BENDIX SD-13-4986 User Manual

The Bendix® ESP® EC-80™ Controller

SD-13-4986

INTRODUCTION

The Bendix® ESP® EC‑80™ Electronic Control Unit (ECU) is a member of a family of three Bendix®‑brand electronic Antilock Braking System (ABS) devices used to help improve the braking characterist ics of air‑braked heavy‑ and medium‑duty trucks, tractors, and buses:

1. The Bendix® ABS ESP® ECU uses wheel speed sensors to monitor four wheel‑ends to detect wheel‑slip or wheel lock‑up during braking. The system inter venes when needed — using Pressure Modulator Valves (PMVs) to adjust and/or pulse the brake pressure — in order to optimize the contact bet ween the t ires and t he road surface.

2. The Bendix® Automatic T raction Control (ATC ) EC‑80 ECU provides standard ABS; improves vehicle traction during acceleration; and aid lateral stability while driving through curves. The Bendix® A TC E CU communicates with the engine’s Controller to provide Engine Torque Limiting (ETL), and/or use Differential Braking (DB) to make brake applications at individual wheels.

3. The Bendix ESP EC‑80 Controller provides — in addition to the ABS and ATC functions described above — advanced braking features referred to as the Bendix® ESP® Electronic Stability Program. The Bendix ESP EC‑80 Controller analyzes the vehicle's motion compared to the driver 's intended path and provides Yaw Control (YC) and Roll Stability Program (RSP) capabilities. When necessary, the s ystem will intervene to reduce the engine throt tle, and/or apply the brakes at one or more of the wheel ends — to help the vehicle return to the intended direction.

™

Label Shows ECU

Designation

FIGURE 1 - THE BENDIX® ESP® EC‑80™ CONTROLLER

The driver is always responsible for the control and safe ope rat io n of th e vehicl e at a ll ti me s. The Bendix® ABS system does not replace the need for a skilled, alert professional driver, reacting appropriately and in a timely manner, and using safe driving practices.

TABLE OF CONTENTS Page

Components . . . . . . . . . . . . . . . . . . . . . 3‑4

Indicator Lamps and Power‑Up Sequence . . . . . 8‑9

ABS Operation. . . . . . . . . . . . . . . . . . . . 9‑10

ATC Operation. . . . . . . . . . . . . . . . . . . . 11‑12

ESP ABS With Stability Control . . . . . . . . . . . 12‑13

Important Safety Information About

The ESP Stability System . . . . . . . . . . . . . 13‑14

Troubleshooting . . . . . . . . . . . . . . . . . . . 17‑62

See page 63 for the full Table of Contents

Bendix

™

EC‑80

System Name

ABS “Standard”

ATC “Premium”

ESP

EC‑60™ ECU) Designations

“Advanced”

Previous (Bendix

ECU; Pressure Modulator Valves (PMVs); Four Wheel Speed Sensors.

Items above, plus: Automatic Traction Control (ATC) Valve; Option of two more Wheel Speed Sensors and PMVs.

All items above, plus: Yaw Rate Sensor; Steering Angle Sensor; Load Sensor; Steer‑axle ATC valve; Brake Demand Sensor; and an Additional PMV

Key Components

ESP® is a registered trademark of DaimlerChrysler and is used by BCVS under license.

Key System Features

(ECU Designation Shown

on the ECU Label)

ABS [Antilock Braking]

(EC‑80 ABS)

ABS plus ATC [Traction Control]

(EC‑80 ATC)

ABS plus ATC plus ESP

[Yaw Control (YC) and

Roll Stability Program (RSP

(EC‑80 ESP)

ECU

Connector

Locations

Provided

Two SD‑13‑4983

Three SD‑13‑4983

Four

)].

See

Service Data

Sheet

SD‑13‑4986

(This

Document)

GENERAL SAFETY GUIDELINES

WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS

TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following guidelines should be observed AT ALL TIMES:

▲ Park the vehicle on a level surface, apply the

parking brakes and always block the wheels. Always wear personal protection equipment.

▲ Stop the engine and remove the ignition key

when working under or around the vehicle. When working in the engine compartment, the engine sho uld be shut off and the ig nition key should be removed. Where circumst ances require that the engine be in operation, EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving, rotating, leaking, heated or electrically-charged components.

▲ Do not att empt to install, remove, dis assemble

or assemb le a component until you have re ad, and thoroughly understand, the recommended procedures. Use only the proper tools and observe all precautions pertaining to use of those tools.

▲ If the wor k is being per formed on th e vehicle’s

air brake system, or any auxiliary pressurized air systems, make ce rta in to drain th e air pressur e from all rese rvoirs before be ginning ANY work on the vehicle. I f th e vehicle i s equip ped wi th a Bendix® AD-IS® air dryer system, a Bendix® DRM™ dryer re se rvoir modul e, o r a B en di x® AD-9si™ air dryer, be sure to drain the purge reservoir.

▲ Following the vehicle manufacturer’s

recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle.

▲ Never exceed manufacturer’s recommended

pressures.

▲ Never connect or disconnect a hose or line

containing pressure; it may whip. Never remove a compone nt or plug unless you ar e certai n all system pressure has been depleted.

▲ Use only genuine Bendix

parts, components and kits. Replacement

hardware, tubing, hose,  ttings, etc. must be of

equivalent size, type and strength as original

equipment and be designed speci cally for such

applications and systems.

▲ Component s with st rippe d threads o r damaged

part s should be replaced ra ther than repaired. Do not attempt repairs requiring machining or

welding unless speci cally stated and approved

by the vehicle and component manufacturer.

▲ Prior to retur ning the vehicle to ser vice, make

certain all components and systems are restored to their proper operating condition.

▲ For vehicles with Automatic Traction Control

(ATC), the ATC function m ust be disabled (ATC indicator lamp should be ON) prior to performing any vehicle maintenance where one or more wheels on a d rive axle ar e lifted of f the groun d and moving.

▲ The power MUST be t emporarily disco nnected

from the radar sensor whenever any tests USING A DYNAMOMETER are conducted on a Bendix Wingman® Advanced™-equipped vehicle.

brand replacement

▲ You should consult the vehicle manufacturer's operating and service manuals, and any related literature,

in conjunction with the Gu ideli nes above.

Even with the Bendix® ESP® system with the EC-80™ Controller, the driver remains responsible for ensuring vehicle stability during operation. The braking system can only function within the limits of physics. The system helps mitigate potential vehicle stability incidents, but cannot prevent them in all cases.

Other factors such as driving too fast for road, trafc

or weather conditions, oversteering, an excessively high vehicle Center of Gravity (CG), or poor road conditions can cause vehicle instability that is beyond the capability of any stability system to mitigate. In addition, the effectiveness of Bendix ESP system with the EC-80 Controller can be greatly reduced on vehicles towing multiple trailer combinations.

The Bendix ESP system with the EC-80 Controller (see page 12) may only be used on vehicles tested and approved by Bendix engineering. The tests produce a validated parameter data set for use by the vehicle’s Bendix ESP EC-80 Electronic Control Unit (ECU).

When replacing an ECU, only specic Controllers —

with the correct parameter set — may be used. See

“Obtaining a N ew Bendix ES P EC‑ 80 C ontroller ” on page 17 for further details.

Bendix ESP system with the EC-80 Controller-equipped

ve hi c les should not be dr i v e n on hi g h -ba n k e d ro a d s —

such as those found on high-speed test or race tracks. Test per sonnel must have the Be ndix ESP system's stability features disabled prior to operating a vehicle on such tracks.

For vehicles with the (optional) Hill Start Aid (HSA) system (sometimes referred to as a “Hill Start Assist”, or simply “Hill Start ”), this feature interfac es between the transmis sion and the braking system. HSA helps the driver prevent the vehicle from rolling downhill w hen m oving up a steep incline from a stationar y position. See page 6 for more

information.

YAW CONTROL (YC)

A Bendix® EC‑80™ ESP® Controller includes Yaw Control (YC) functionality. Yaw Control has the ability to apply brakes to individual wheel ends, as well as applying the trailer brakes, to counteract trailer “pus h” that — during cert ain maneuvers — could lead to a loss‑ of‑control or a jackknife incident. See " Yaw Stability" on page 13 for

further details.

ROLL STABILITY PROGRAM (RSP)

The Bendix ABS solution that helps decrease vehicle speed by reducing the engine's throttle and applying all vehicle brakes as needed, mitigating the vehicle's tendency to roll over. RSP focuses on reducin g the vehicle’s speed below the critical ro ll thre sho ld dur in g direc ti on‑changing maneuvers — such as driving on curved highway exit ramps or obstacle avoidance maneuvers on dry, high friction sur faces. See " ESP ABS with Stabilit y Control"

on page 12 for further details.

Roll Stability Program (RSP), is an all‑a xle

The Bendix ESP EC‑80 Controller 's ESP/RSP function utilizes the following additional components:

• A Steer Axle T raction Control V alve (may be integral to the service brake Relay Valve or a stand‑alone device)

Sensor

Clamping

Sleeve

Straight Speed

90° Speed

Sensors

FIGURE 2 - BENDIX® WS‑24™ WHEEL SPEED SENSORS

Delivery

(Port 2)

™

M-40X

Modulator

Exhaust (Port 3)

Sensors

Supply

(Port 1)

Electrical

Connector

During an RSP syste m intervent ion, the vehicle automatically decelerates. RSP can slow the vehicle with or without the operator applying the brake p edal, and even when the o perator is applying the throttle.

COMPONENTS

The Bendix ESP EC‑80 Controller’s ABS function utilizes the following components:

• Bendix® WS‑24™ Wheel Speed Sensors (four or

six, depending on the conguration), each with a

clamping sleeve. [Refer to SD-13-4860]

• Bendix® M‑40QR™ or M‑40‑HF™ Pressure Modulator

Valves (four, ve, or six may be present) [refer to SD-13-4958]. For legacy systems where a Bendix®

M‑32™ or M‑32QR™ Pressure Modulator Valve is used, refer to SD-13-4870.

• A dash‑mounted tractor ABS Indicator Lamp

• A service brake Relay Valve

• A dash‑mounted trailer ABS Indicator Lamp

• An optional blink code Activation Switch

• An optional ABS Off‑road Switch

FIGURE 3 - EXAMPLE OF A BENDIX M‑40X™ MODULATOR

• A dash‑mounted ESP Status/Indicator Lamp (also serves as the ATC Status/Indicator Lamp)

• A Bendix® SAS‑60™ Steering Angle Sensor (mounted to the steering column ‑ See Figure 4)

When replacing a steering wheel, take care not to damage the Steering Angle Sensor or interfere with its operation, and the Steering Angle Sensor must be recalibrated (see Troubleshooting section.)

Straight

Connector

FIGURE 4 - EXAMPLES OF STEERING ANGLE SENSORS

90° Connectors

• Bendix® YAS‑60™ or YAS‑70X™ Yaw Rate/Lateral Acceleration Sensors (typically mounted to a cross‑ member near the back of the vehicle cab). See

Figure 5.

• Brake Demand Sensors (installed in the primary and secondary delivery circuits)

• A Load Sensor (typically installed in the suspension air bag)

• An additional Modulator Valve (Bendix® M‑40QR™ or M‑40HF™ Pressure Modulator Valve) that controls the pressure applied to the trailer brakes during a system intervention

The Bendix® ESP® EC‑ 80™ Controller's ATC function utilizes the following additional components:

• A drive axle Traction Control V alve (may be integral to the service brake relay valve or a stand‑alone device)

• A dash‑mounted ATC Status/Indicator Lamp

• A J1939 serial communication Control Module

• A J1939‑ or ECU hardware‑provided Stop Lamp Switch Input

• An optional ATC Mud/Snow Switch (sometimes referred to as an ATC off‑road switch)

Brake Demand/

Load Sensor

Bendix® RV-3

Pressure

Reducing Valve

FIGURE 6 - ADDITIONAL VALVES NECESSARY FOR THE

HILL START AID FEATURE

™

Bendix® AT-3

Traction Control

Valve

™

Bendix Double Check

Valve

DC-4

BENDIX® ETRAC™ AUTOMA TED AIR SUSPENSION TRANSFER SYSTEM

The Bendix® eTrac™ automated air pressure transfer system is used on 6 x 2 semi‑trac tors that feature Bendix® ATC and ESP Antilock Brake Systems (ABS). This system complements the Bendix® S MART AT C™ traction control feature of our ABS system to provide improved traction at low speeds (e.g. pulling away on an inclined ramp, or in slippery conditions such as mud or snow‑covered surfaces, etc.) When active, the Bendix eTrac system vents — or “dumps” — the air pressure of the tag axle susp ension air bags, and increases the air pressure in t he drive a xle suspension air bags to a pre‑determined maximum. This action helps the drive axle to gain more traction.

See SD-13-21021 for more information about the Bendix® eTrac™ Automated Air Suspension Transfer System.

Yaw/Lateral

Accelerator Sensors

(Two examples

shown.)

FIGURE 5 - YAW AND BRAKE DEMAND/LOAD SENSORS

The Bendix ESP EC‑80 Controller's Hill Start Aid function utilizes the following additional components:

• A Bendix® AT‑3™ Traction Control Valve

• A dash‑mounted Hill Start Status/Indicator Lamp

• A dash‑mounted Enable/Disable Switch

• A Bendix® RV‑3™ Pressure Reducing Valve

• A Bendix® DC‑4® Double Check Valve

ECU MOUNTING

The Bendix ESP EC‑80 Controller is not protected against moisture, and must be mounted in an environmentally protected area.

All wire harness connectors must be properly seated. The use of secondary locks is strongly recommended.

The Bendix ESP EC‑80 Controller utilizes connectors from the AMP MCP 2.8 product family.

HARDWARE CONFIGURATIONS

Bendix ESP EC‑80 Controllers support applications up to six sensor/six modulator (6S/6M) installations with ATC and drag torque control. They can also support Hill Start functions. All 12 volt models suppor t Power Line Carr ie r (PLC). 24 volt models do not support PLC. See Figure 7

for more details.

ABS

Off-

Road

ATC

Mud/Snow

Blink

Codes

ESP/

RSP

HSA

Hill Start

Aid Feature

Bendix

eTrac

system*

Optional Optional Optional 12/24 4/5/6 4/6

For information about the Bendix® eTrac™ automated air suspension transfer system, see SD‑13‑21021

FIGURE 7 - BENDIX® ESP® EC‑80™ CONTROLLER FEATURES

BENDIX® ESP® EC-80™ CONTROLLERS USE POWER LINE CARRIER (PLC)

All new towing vehicles built since March 1, 2001 , have had an in‑cab trailer ABS Indicator Lamp installed.

Trailers built since Marc h 1, 2001, transmit the status of the trailer ABS over the power line (the blue wire of the J560 connector) to the tractor using a Power Line Carrier (PLC ) signal. See Figures 8 and 9. Typically the signal is broadcast by the trailer ABS Electronic Control Unit (ECU).

™

Voltage

Input

PLC

Modu-

lators

(PMVs)

Retarder

Relay

Sensors

Serial

Communication

J1939

Suggested oscilloscope settings are AC coupling, with one volt/div, 100 µsec /div. The signal should be measured at the ignition power input of the Bendix EC‑80 Controller.

Note: An ABS trailer equipped with PLC, or a PLC diagnostic tool, must be connected to the vehicle in order to generate a PLC signal on the power line.

BENDIX ESP EC-80 CONTROLLER INPUTS

Battery and Ignition Inputs

The Bendix ESP EC‑ 80 Controller oper ates at a nominal supply voltage of 12 or 24 volts, depending on the ECU. The battery input is connected through a 3 0 amp fuse directly to the battery.

The ignition input is applied by the ignit ion switch circuit through a 5 amp fuse.

FIGURE 8 - POWER LINE WITHOUT PLC SIGNAL

FIGURE 9 - POWER LINE WITH PLC SIGNAL

The application of PLC technology fo r the heavy vehicle industry in North America is known as “PLC4Trucks.”

The Bendix® ESP® EC‑ 80™ Controller supports PLC communications in accordance with SAE J2497.

PLC SIGNAL

An oscillosc ope can be used to measure or identif y the presence of a PLC signal on the power line. The PLC signal is an amplitude and frequency‑modulated signal.

Depending on the ltering and load on the power line,

the PLC signal amplitude can range from 5.0 mVp‑p to

7.05 Vp‑p.

Ground Input

The Bendix ESP EC‑ 80 Controller supp orts one gr ound input. See pages 52 and 53 for wiring system schematics.

ABS Indicator Lamp Ground Input

The Bendix ESP EC‑80 Controller requires a second ground input (X1‑12) for the ABS indicator lamp. The X1 wire harness co nnector contains an AB S indicator lamp interlock (X1‑15), which shorts the ABS indicator lamp circuit (X1‑18) to ground if the connector is removed from the ECU.

Bendix® WS-24™ Wheel Speed Sensors

Wheel speed data is provided to the B endix ESP EC‑ 8 0 Controller from the Bendix® WS‑24™ wheel speed sensor (see Figure 2). Vehic les have an exciter ring (or “tone ring”) as part of the wheel assembly. As the wheel turns, the teeth of the exciter ring pass the whee l speed sensor, generating an AC signal. The Bendix ESP EC‑80 Controller receives the AC signal, which varies in voltage and frequency as the wheel speed changes.

Vehicle axle configurations determine the number of Bendix WS‑24 wheel speed se nsors that must be used. A vehicle with a single rear axle requires four wheel speed sensors. Vehicles with two rear axles can utilize six wheel speed sensors for optimal performance.

Diagnostic Blink Code Switch

A momentary switch that grounds the ABS Indicator Lamp output is used to place the ECU into the diagnostic blink code mode and is typically located on the vehicle’s dash panel.

Optional ABS Off-Road Switch and Indicator Lamp Operation

Vehicle operators use an optional dash‑mounted switch to place the Bendix® ESP® EC‑ 8 0™ Controller into the ABS off‑road m ode. See "Optional A BS Off- Road Mode" on page 10 for further details. In some c ases, ECUs may also be put into the ABS off‑road mode by one of the other vehicle control module s, using a J193 9 message to the Bendix ESP EC‑80 Controller.

(If you need to know if a specic Bendix ESP EC‑80

Controller uses a J1939 message to operate the lamp, contact the Bendix Tech Team. E‑mail the Tech Team at ABS@bendix.com (be sure to specify the ECU par t number), or call 1‑800‑AIR‑BRAKE (1‑800‑245‑2725).

The ABS off-road mode should not be used on normal, paved road surfaces because vehicle stability and steerability may be adversely affected. When the ECU is placed in the ABS off-road mode,

the ABS Indicator Lamp will ash constantly (at a

rate of onc e per 2 .5 secon ds) to notif y th e vehicle operator that the off-road mode is active.

Optional ATC Mud/Snow (Off-Road) Switch and Indicator Lamp Operation (also see page 8.)

The Bendix ESP system uses a dash‑mounted switch for the operator to place the ECU into the ATC Mud/Snow mode.

Optional Hill Start/Hill Start Assist Feature Switch and Lamp Operation (see also page 8.)

ESP Controllers use a dash‑mounted switch for the operator to place the ECU into the hill star t mode. This feature interfaces between the transmission and the braking system to help the driver prevent the vehicle from rolling downhill when moving up a steep incline fro m a stationary position.

With Hill Start Aid Feature option you lose the ABS off-road function and the retarder relay output.

When the ECU is placed in the Hill Start Aid (HSA) feature

mode, the HSA Indicator Lamp will ash constantly (at a

rate of once per 2.5 seconds) to notify the vehicle operator that the HSA mode is active. The ECU receives J1939 messages from the t ransmissi on to engage the H S/HSA components. When engaged, the system applies 44 psi to the rear brakes for three (3) seconds then releases. This function is totally controlled by the automatic transmission.

Stop Lamp Switch (SLS)

The Bendix ESP EC‑ 80 Controller monitors the vehic le stop lamp status. Certain vehicle functions, such as ATC and All‑Wheel Drive (AWD), use the status of the stop lamp to determine when the driver makes a brake application. This c an be provided to the ECU via J1939 communications, or hardware input.

Brake Demand Sensors

The brake demand sensors provide the Controller with an indication of driver‑applied brake pressure. One is installed in the primary air brake circuit, and another is installed in the secondary air brake circuit.

Load Sensor

The load sensor provides the Controller with an indication of the vehicle load. It is typic ally installed in one of the suspension air bags.

Bendix® SAS-70X™ Steering Angle Sensor

Bendix® brand Steering Angle Sensors (SAS) are used to report the steering wheel position to the Controller, utilizing a dedicated serial communications link that is shared with the Y a w Rat e Sensor. The Controller supplies the power and ground inputs to the Bendix® SAS‑70X™ sensor.

The Bendix SAS‑70X sensor is available with two different styles of wire harness connectors. (See Figure 4.)

Bendix® YAS-60™ or Y AS-70X™ Yaw Rate/Lateral Acceleration Sensors

Bendix® brand yaw rate/lateral acceler ation sensors are used to provide the Controller an indication of vehicle lateral acceleration an d rotati on around t he ver ti c al ax is. This information is provided to t he Controller, utilizing a dedicated serial c ommunications link that is sha red with the Bendix® SAS‑60™ sensor. The Controller supplies the power and ground inputs to the yaw rate sensor.

BENDIX® ESP® EC-80™ CONTROLLER OUTPUTS

Bendix® M-40QR™ and M-40HF™ Pressure Modulator Valves (PMVs)

The Bendix ESP EC‑80 Controller operates Bendix® M‑40QR™ and M‑40HF™ Pressure Modulator Valves (PMVs) to modify the dr iver‑applied air pressure to the servic e brakes during ABS, ATC, RSP or YC activation (see pages 9-13). The PMV is an electropneumatic control valve and is the last valve that air passes through on its way to the brake chamber. The modulator hold and release solenoids are activated to "modulate" or "control" the brake pressure during an antilock braking event. The hold solenoid is normally open and the release solenoid is normally closed, such that the PMV nominally allows air to

ow through. This design allows for air delivery to brake

chambers in the event of electrical trouble.

The Bendix® ESP® EC‑ 80™ Controller also utilizes an additional Pressure Modulator Valve (PMV) for control of the trailer service brakes during stability interventions.

Traction Control Valve (TCV)

Bendix ESP EC‑80 Controllers use two TCVs, one on the steer axle and one on the dr i ve a x l e. The TCV may be a separate valve or integrated into the rear axle relay valve.

The Controller will activate the drive axle TCV during differential braking ATC events.

During stabilit y interventions, the Controller will act ivate both the steer axle and drive axle TCVs as required.

Stop Lamp Output

The Controller provides an output to control a relay that illuminates the vehicle stop lamps during stability interventions. This information is also available using the J1939 serial communications link.

ABS Indicator Lamp Control with Optional Diagnostic Blink Code Switch

The Bendix ESP EC‑80 Controller has internal circuitry to control the ABS Indicator Lamp on the dash panel.

The ABS Lamp Illuminates:

1. During power up (e.g. when the vehicle is started) for approximately three (3) seconds and turns off after the self‑test is completed, providing no Diagnostic Trouble Codes (DTCs) are present on the ECU;

2. When full ABS operation is not available due to the presence of a DTC on the ECU;

3. If the ECU is unplugged or has no power;

4. When the ECU is placed into the ABS off‑road

mode (the lamp ashes steadily at a rate of once per

2.5 sec.); or

5. To display blink codes for diagnostic purposes after the external diagnostic switch is activated.

The Bendix ESP EC‑80 Controller may communicate with other vehicle control modules to operate the ABS Indicator Lamp using serial communications. (If you need to know if this Bendix ESP EC‑ 80 Controll er uses serial communications to operate the lamp; e‑mail ABS@ bendix.com, (be sure to specify the ECU part number), or call 1‑800‑AIR‑BRAKE/1‑800‑247‑2725 and speak to the Bendix Tech Team.)

Indicator Lamp Control Using Serial Communications Links

As mentioned above, depending on the vehicle manufacturer, the dash indicator lamps (ABS, ATC, ESP, and trailer ABS) may be controlled using serial communications links. In the se cases, the Bendix ESP EC‑80 Controller will send a serial communications message over the J1939 link, indicating the required status of the lamp(s). Another vehicle contro l module receives the message and controls the indicator lamp(s).

Dynamometer Mode Indicator Lamp Operation

When the Bendix ESP EC‑ 80 Controller is put into the Dynamometer mode for testing purposes, the ATC Indicator Lamp will be illuminated.

Retarder Relay Disable Output

The retarder relay disable output may be used to control a

retarder disable relay. When congured to use this output,

the ECU will energize the retarder disable relay and inhibit the use of the retarder as needed.

If the ECU is congured for the Hill Start/ Hill Start Assist

feature (HS/HSA), the retarder relay output pin is used to control the Hill St art status lamp. As a result, the vehic l e loses the retarder relay function when it has the Hill Start feature.

SAE J1939 Serial Communications

A Controller Area Network (CAN) data link (SAE J1939 ) is provided for communication. This link is used for various functions, such as:

• Diagnostic purposes.

• To disable retarding devices during ABS operation.

• To request that the torque converter disable lock‑up during ABS operation

• To share information such as wheel speed and ECU status with other vehicle control modules.

Bendix ESP EC‑80 Controllers utilize the J1939 data link for:

• ATC and drag torque control functions.

• Vehicle stability functions.

Trailer ABS Indicator Lamp Control

The Bendix ESP EC‑80 Controller will activate a trailer ABS Indicator Lamp (located on the dash panel) that indicates the status of the trailer ABS unit on one, or more trailers, or dollies that are equipped with PLC functionality. T ypically , the Bendix ESP EC‑80 Controller directly controls the trailer ABS Indicator Lamp based on the information it receives from the trailer ABS, via PLC.

Alternatively, some vehicles require the Bendix ESP EC‑80 Controller to activate the trailer A BS Indicator Lamp by communicating with other vehicle Controllers using serial communications.

(If you need to know if this Bendix ESP EC‑ 80 Controller uses a serial communications message to operate the lamp, e‑mail ABS@bendix.com (be sure to specify the ECU part number), or call 1‑800‑AIR‑BRAKE (1‑800‑245‑2725) and speak to the Bendix Tech Team.)

Interaxle Differential Lock Control (AWD Transfer Case)

Bendix ESP EC‑ 80 Controllers c an control the intera xle differential lock (AWD transfer case) . This is recommended

on AWD vehicles, but the ECU must be specially congured

to provide this feature. E‑mail ABS@bendix.com for more details.

INDICATOR LAMPS AND POWER-UP

ATC

SEQUENCE

NOTICE: The vehicle operator should Verif y the proper

operation of all installed indicator lamps (ABS, ATC/ESP, and trailer ABS) when applying ignition power and during vehicle operation. See Figure 10.

Lamps that do not illuminate as expected when ignitio n power is applied, or remain illuminated, indicate the need for maintenance.

Dash Lamp Behavior for the

ABS

Bendix® ESP® EC-80™ Controller

Mode

Ignition on ‑ start up

[trailer with Power Line

Carrier (PLC)]

3 seconds after ignition

At Vehicle Startup

[with no Diagnostic

Trouble Codes (DTCs)]

ABS

Off-Road

Mode

Vehicles with Hill Start Aid (HSA):

Special Mode Operation

Deep

Mud/

Snow/

Mode

During an Automatic Traction Control (ATC) Event Flashes quickly • Reduces wheel slip during acceleration at low speeds

During Dynamometer Mode

Normal

During an ATC

Event

‑— OR, depending on vehicle options (a vehicle can have either ABS off‑road or HSA) —

During HSA Mode

(“Hill Start” / “Hill Start Assist”)

Normal OFF

During an ATC/ESP

Event

During an ESP Event Flashes quickly •

ABS

Lamp

ON for

three (3)

seconds*

Lamp OFF* Lamp OFF* Lamp OFF**

Lamp ashes

slowly (every 2.5

seconds)

OFF Flashes quickly

ATC/ESP Lamp

ON for 2.5

seconds*

Lamp OFF

Flashes quickly

During HSA Event Lamp OFF

HSA Manually Disabled

Flashes slowly

(every 2.5

seconds)

Lamp ON

(ATC

Disabled)

TRLR

ABS Lamp

seconds**

• Uses dash switch

• Not for rm road surfaces

• Allows more wheel lock‑up (less ABS intervention)

• Mode only applies under 25 mph (Over 25 mph, the system reverts to

• Disables ATC monitoring functions

• When not in Dynamometer Mode, an illuminated lamp indicates an ATC DTC is present

HSA

Trailer

ON for

three (3)

full ABS ‑ including ATC/ESP — and upon exiting off‑road mode, the ATC lamp extinguishes.)

• Uses dash switch

• Increases allowable wheel slip during ATC interventions

• Not for rm road surfaces

System intervenes to reduce the risk of rollovers, loss‑of‑control, etc.

HSA

Lamp

ON for

three (3)

seconds*

Lamp

OFF*

Flashes

slowly

Comments

If any of the described lamp behaviors

do not occur — or if the lamp remains on during operation — have the vehicle

serviced by a qualied mechanic as

soon as possible to restore full system functionality.

Some vehicle manufacturers may

illuminate the trailer ABS indicator lamp at power‑up regardless of whether a PLC signal is detected from the trailer or not. Consult the vehicle manufacturer’s documentation for more details.

• The HSA lamp is illuminated only at power‑ up, or if an HSA DTC is present

0.5 2.0 2.5 3.0 (sec.)1.5

Power

Application

ATC/ESP System

Status Indicator

at Start-Up

ATC/ESP

enabled

No ESP

or ATC

ABS System

Status Indicators

at Start-Up

Powered Vehicle ABS

Indicator Lamp

Trailer ABS

Indicator Lamp

(PLC Detected)**

Trailer ABS

Indicator Lamp**

(PLC Not Detected)

ON OFF

FIGURE 10 - BENDIX® ESP® EC‑80™ CONTROLLER INDICATOR LAMP BEHAVIOR 8

ON OFF

0.5 2.0 2.5 3.0 (sec.)1.5

Power

Application

ABS Indicator Lamp Operation (Bulb Check)

The Bendix® ESP® EC‑80™ Controller will illuminate the ABS Indicator Lamp for approximately three seconds when ignition power is applied, after which the lamp will extinguish if no Diagnostic Trouble Codes (DTCs) are detected.

The Controller will illuminate the ABS Indicator Lamp whenever full ABS operation is not available due to a DTC. In most cases, partial ABS is still available.

ATC/ESP Status/Indicator Lamp Operation

The Bendix ESP EC‑80 Controller will illuminate the A TC/ ESP lamp for approximately 2.5 seconds when i gnition power is applied, after which t he lamp will extinguish if no DTCs are detected. The Controller will continuously illuminate the AT C/ESP Indicator Lamp whenever ESP or ATC is disabled due to a DTC.

During an ESP or ATC intervention, the lamp will ash

rapidly (2.5 times per second). When the C ontroller is placed in the ATC Mud/Snow (off‑ road) mode, the lamp

will ash slowly at a rate of once every 2.5 seconds.

Trailer ABS Indicator Lamp Operation

The Controller will control the Trailer ABS Indicator Lamp when a PLC signal (SAE J2497) from a trailer ABS ECU is detected.

Hill Start Assist (HSA) Indicator Lamp Operation

Vehicles with HSA enabled, will illuminate the HSA Indicator Lamp when ignition power is applied. The lamp will extinguish if there are no issues with the HSA system.

This test is performed only when the vehicle is stationary (if the vehicle moves, the Chuff Test will not be performed).

The Bendix ESP EC‑80 Controller will per form a PMV Chuff Test on all installed modulators in the following order:

• Steer Axle Right PMV;

• Steer Axle Left PMV;

• Drive Axle Right PMV;

• Drive Axle Left PMV;

• Additional Axle Right PMV;

• Additional Axle Left PMV; then

• Drive Axle TCV The pattern will then repeat itself. See Figure 11. Vehicles with a Bendix ESP EC‑80 Controller — following

the completion of the second round of PMV & TCV Chuff

Tests — the Controller (if congured to do so) will perform

a test to cross‑ check the trailer PMV o peration with the vehicle stop lamps. If the trailer PMV c irc uit i s mis‑wired (including the steer axle TCV), the PMV will exhaust a large amount of air, or none at all.

NOTICE: If there are any active DTCs, the stop lamp cross‑check portion of the Chuff Test will not be carried out until all DTCs are fully diagnosed and the corresp onding repairs are succes sfully conduc ted. The ESP/ATC dash indicator will also illuminate when there are ac tive ABS, ATC or ESP DTCs.

The ECU will not perform the PMV Chuff T est when wheel speed sensors show that the vehicle is in motion.

Pressure Modulator Valve (PMV) and Traction Control Valve (TCV) Chuff Test

Right Steer

Driver

Left Steer

FIGURE 11 - VEHICLE ORIENTATION (TYPICAL)

After the performance of the conguration test, the Bendix

ESP EC‑80 Controller will perform a Bendix‑patented PMV and TCV Chuff Test. The Chuff Te st is an elect ric al and pneumatic PMV test that can assist maintenance personnel in verifying proper PMV wiring and installation.

When ignition power is applied, eac h m odulator so le noi d

is briey energized. If the air system is fully charged and

the servic e brake pedal is depres sed during i gnition, the modulator creates a single, sharp audible “chuf f” of air pressure. The modulators are energized in a certain pattern: right front; left front; right rear; then left rear.

Right Drive

Left Drive

Right

Additional

Left

Additional

ABS OPERATION

Bendix® ABS uses wheel speed s ensors, ABS pres sure modulator valves, and an ECU to control either four or six wheels of a vehicle. The Bendix ESP EC‑ 80 Controlle r monitors individual wheel tur ning motion during brak ing, and adjusts or modulates the brake pressure at the wheel end. When excessive wheel slip — or wheel lock‑up — is detected, the Bendix ESP EC‑ 80 Controller will act ivate the pressure modulator valves to automatically reduce the brake pressure at one or more of the wheel ends. By these actions, the A BS system helps to maintain the vehicle's lateral stability and steerability during heavy brake applications and during braking on slippery surfaces.

Steer Axle Control

Although both wheels of the steer axle have their own wheel speed sensor and pres sure modulator valve, the Bendix ESP EC‑ 80 Controller blends the applied braking force between the two steering axle brakes. This Bendix patented brake application control, called Modified Individual Regulation (MIR), is designed to help reduce steering wheel pull during an ABS event on road surfaces with poor tracti on, or areas of poor tracti on (e.g. asphalt road surfaces with patches of ice).

Single Drive Axle Control (4x2 Vehicle)

For vehicles with a single rear drive axle (4x2) , the brakes are operated independently by the Bendix® ESP® EC‑80™ Controller, based on the individual wheel behavior.

Dual Drive Axle Control (4S/4M Conguration)

For vehicles with dual drive axles (6x4) using a 4S/4M

conguration, one ABS modulator controls both of the

right‑side rear whe els; the other modulator c ontrols both of the left‑side r ear wheels. Both wheels on each side receive equal brake pressure during an A BS stop. The rear wheel speed sensors must b e installed on the axle with the lightest load.

Dual Rear Axle Control (6S/6M Conguration)

For vehicles with dual rear axles (6x4, 6x2) using a 6S/6M

conguration, the rear wheels are controlled independently.

Therefore, brake application pressure at each wheel is adjusted according to the individual wheel behavior on the road surface.

6x2 Vehicles with 6S/5M Conguration

6x2 vehicles can utilize a 6S/5M conguration, with the

additional axle (a non‑driven rear axle) having two sensors, but only one Pressure Modulator Valve (PMV). In this case, the PMV controls both wheels on the additional axle. The additional axle wheels would receive equal brake pressure, based on the wheel that is currently experiencing the most wheel slip.

Normal Braking

During normal braking, brake pressure is delivered through the ABS PMV and into the brake chamber. If the ECU does not detect excessive wheel slip, it will not activate ABS control, and normal vehicle service braking is applied.

Retarder Brake System Control

On surfac es with low trac tion, applic ation of the retar der can lead to high levels of wheel slip at the drive axle wheels, which can adversely affect vehicle stability.

T o prevent this, the Bendix ESP EC‑80 Controller switches off the retarder as soon as a lock‑up is detected at one (or more) of the drive axle wheels.

When the ECU is placed in the A BS off‑road mode (on vehicles equipped with this optional feature), it will switch off the retarder only w hen ABS is active on a steer a xle wheel and a drive axle wheel.

Optional ABS Off-Road Mode

On some road conditi ons, particularly when the drivin g surface is s oft, the stopping distance with conventional ABS may be longer than witho ut ABS. This can occur when a locked wheel on soft ground or loose gravel plows up the road surface in front of the tire, changing the rolling friction value. Alt hough vehicle stopping dist ance with a locked wheel (in the absence of ABS) may be shorter than

corresponding stopping distanc e with conventional ABS control, vehicle steerability and stability would be reduced.

Bendix ESP EC‑80 Controllers have an optional dash

switch that initiates a modied ABS control mode (known

as "off‑road A BS") that more effectively ac commodates these soft road c onditions to shorten stopping distanc e while maintaining optimal vehicle steerability and stability.

Note: Off‑road mode is not available if the vehicle is equipped with Hill Start / Hill Start Assist (HS or HSA).

The ABS off-road mode should not be used on normal, paved road surfaces because vehicle stability and steerability may be reduced. The ABS

Indicator Lamp will ash slowly to indicate to the

driver that the ABS off-road mode is engaged.

When ABS off-road mode is engaged, stability functions are disabled at speeds below approximately 25 mph/40 kph. The A TC/ESP dash lamp will illuminate to indicat e to the driver that t he stability syst em is disabled.

The vehicle manufacturer should provide the optional ABS off‑road function only for vehicles that operate on unpaved surfaces — or that are used in off‑road applications — and is responsible for ensuring that vehicles equipped with the ABS off‑road function meet all FMVSS‑121 requirements and have adequate operator indicators and instructions.

The vehicle operator activates the off‑road function with a

switch on the dash panel. A ashing ABS Indicator Lamp

indicates to the driver that the A BS off‑road function is engaged. To exit the ABS of f‑road mode, depress and release the switch. A new ignition cycle w ill also cause the ECU to exit the ABS off‑road mode.

All-Wheel Drive (AWD) Vehicles

AWD vehicles with an engaged interaxle differential (steer axle to rear axle) / AWD transfer case, may have negative effects on ABS performance. Optimum ABS performance is achieved when the lockable differentials are disengaged, allowing individual wheel control.

Bendix ESP EC‑80 Controllers can be programmed

specically for this conguration to control the differential

lock/unlock solenoid in the AWD transfer case. When programmed to do so, the ECU will disengage the locked interaxle/AWD transfer case during an ABS event and reengage it once the ABS event has ended.

ATC OPERATION

ATC Functional Overview

Just as ABS improves vehicle stabilit y during braking, Automatic T raction Control (A TC ) improves vehicle stability and traction during vehicle acceleration. The Bendix® ESP® EC‑ 80™ Controller's ATC function uses the same wheel speed information and modulator control as the ABS function. The Bendix ESP EC‑80 Controller detects excessive drive wheel speed; compares the speed to the front, non‑driven wheels; and reacts to help bring the wheel

spin under control. The Controller can be congured to use

engine torque limiting and/or differential braking to control wheel spin. For optimal AT C performance, both methods are recommended.

ATC/ESP Lamp Output/ATC Mud/Snow Switch Input

Bendix ESP EC‑80 Controllers operate the AT C/ESP dash lamp as follows.

The ATC/ESP dash lamp illuminates:

1. During power up (e.g. when the vehicle is started) for approximately 2.5 seconds and turns off after the self test is completed, providing no Diagnostic Trouble Codes (DTCs) are present.

2. When ESP or ATC is disabled for any reason.

3. During an ESP or ATC event (the lamp will ash rapidly

at a rate of 2.5 times per second).

4. When the ECU is placed in the ATC off‑road mode

(the lamp will ash steadily at a rate of once every 2.5 seconds). This noties the vehicle operator that the

ATC Mud/Snow mode is active.

5. When the ECU is placed in the ABS off‑road mode. When in this mode, ESP will be disabled below 25 mph and its inactive status will be indicated by a steadily illuminated A TC/ESP lamp.

Differential Braking

Differential br aking within ATC is automatically activated when drive wheel(s) on one side of the vehicle are spinning excessively. This typically occurs on road sur faces with patches of ice. The tract ion system will then lightly apply the brake to the drive wheel(s) that are spinning excessively. The vehicle differential will then drive the wheels on the other side of the vehicle.

Differential braking (as part of A TC functionality) is available at vehicle speeds up to 25 mph/40 kph.

Disabling ATC Differential Braking

ATC differential braking is disabled under the following conditions:

1. During power up (e.g. when the vehicle is started), until the ECU detects a service brake application.

2. If the ECU receives a J1939 message indicating that the vehicle is parked.

3. When the dynamometer test mode is active. The Dynamometer test mode is entered using the diagnostic Blink Code Switch or by using a diagnostic tool (such as Bendix® ACom® Diagnostics).

4. In response to a serial communications request from a diagnostic tool.

5. If ATC Differential Braking function is activated for a long time period to avoid overheating of the brakes. It would take approximately three (3) continuous minutes of activation for the time‑out to occur. Once timed‑out, approximately two (2) minutes of "cool off" time would be required before A TC Dif ferential Braking can be used again.

6. When certain DTC conditions are detected.

Traction Control with Engine Torque Limiting

The Bendix ESP EC‑ 80 Controller uses Engine Torque Limiting to control drive ‑ axl e wheel slip. This is c ommu ‑ nicated to the engine contro l module (using J19 39), and is available at all vehicle speeds.

Bendix® SMART ATC™ System

The Bendix ESP EC‑80 Controller has an additional feature known as the Bendix® SMART ATC™ system. This system monitors the accelerator pedal position (using J1939) to help provide optimum traction and vehicle stability. By determining the driver’s throttle input and adapting the target slip of the drive wheels to the dr iving s ituation, th e Bendix SMART ATC system allows higher wheel slip when the accelerator pedal is applied above a preset level.

The wheel slip allowed by the Bendix SMART AT C system is decreased when dri ving through a cur ve for improved stability.

Disabling ATC Engine Control and the Bendix SMART A TC System

A TC Engine Control and the Bendix SMART AT C system will be disabled under the following conditions:

1. In response to a serial communications request from an off‑board tool;

2. At power‑up until the ECU detects a service brake application;

3. If the ECU receives a J1939 message indicating that the vehicle is parked;

4. If the dynamometer test mode is active. This may be accomplished via an off‑board tool or the diagnostic Blink Code Switch; or

5. When certain DTC conditions are detected.

Optional ATC Mud/Snow (Off-Road) Mode

In some road conditions, the vehicle operator may desire additional drive wheel slip when ATC is active. The Bendix® ESP® EC‑8 0™ Controller has an optional c o ntro l m od e to permit this desired performance.

The vehicle operator can activate the Mud/Snow function with a switch on the dash panel. Alter nately, a J1939 message may be used to place the vehicl e in this mo de.

The ATC/ESP Indicator Lamp will ash steadily at a rate of once every 2.5 seconds to conrm that the ATC mud/

snow mode is engaged. T o exit the A TC Mud/Snow mode, depress and release the

ATC Mud/Snow switch.

BENDIX ESP EC-80 ABS WITH STABILITY CONTROL

Overview

The Bendix ESP system with the EC‑80 Controller reduces

the risk of rollovers, jackkning and other loss‑of‑control

events. Bendix ESP EC‑80 Controllers include Roll Stability Program (RSP®) and Y aw Control (YC) functions. During operation, the Bendix ESP EC‑80 Controller constantly compares performance models to the vehicle’s

Drag Torque Control Functional Overview

Bendix ESP EC‑80 Controllers have a feature referred to as drag torque control which reduces wheel slip on a driven axle due to driveline iner t ia. This c on dition i s address ed by increasing the engine torque to overcome the inertia.

Drag torque control increases vehicle stabilit y on low‑ traction road sur faces during down‑shifting or retarder braking.

actual movement, using wheel speed sensor s; a lateral acceleration sensor, a yaw rate sensor, and a steering angle sensor. If the vehicle shows a tendency to leave an appropriate travel path, or if criti cal threshold values are approached, the system will intervene to assist the driver.

A Real World Example Of How The RSP System Operates:

Excessive speed for road conditions creates forces that exceed the threshold at which a vehicle is likely to rollover on a higher‑ friction surface.

The system automatically reduces engine torque and applies the service brakes (based on the projected rollover risk) to reduce the vehicle speed, thereby reducing the tendency to roll over.

A Real World Example Of How Yaw Control Operates:

Excessive speed exceeds the threshold, creating a situation where a vehicle is likely to spin and jackknife.

The Bendix and selectively applies brakes to reduce the tendency to jackknife.

Y aw Control system reduces engine throttle

FIGURE 12 - RSP EXAMPLE

FIGURE 13 - YAW CONTROL EXAMPLE

Bendix® Roll Stability Program (RSP®)

Bendix RSP — an element of the overall Bendix® ESP® system with the EC‑8 0™ Controller — addresses r ollover conditions. In the c ase of a potential roll event, the ECU will override the throttle and quickly apply brake pressure at all wheel ends to slow the vehicle co mbination. The level of braking application during an RS P event will be proportional to roll risk. See Figure 12.

Yaw Stability

Y aw stability counteracts the tendency of a vehicle to spin about its vertic al axis. Dur ing operation — if t he frict ion

between the road surface and the tires is not sufcient

to oppose lateral (side) forces — one or more of the tires can slide, causing the truck/tractor to spin. These events are referred to as either an "under‑steer" situation (where there is a lack of vehicle response to steering input due to tire slide on the steer axle), or an "over‑steer" (where the tractor's rear end slides out due to tire slide on the rear axle) situation. Generally, shorter wheelbase vehicles (tractors, for instance) have less natural yaw stability, while longer wheelbase vehicles (straight trucks, for instance) have

greater natural yaw stability. Factors that inuence yaw

stability are: wheelbase, suspension, steering g eometry, weight distribution front to rear, and vehicle track width.

Yaw Control

Yaw control responds to a wide range of low‑ to high‑ friction sur face scenarios including rollover, jackknife and loss‑of‑control. It is the recommended system for all power vehicles and especially cr itical for trac tors pulling trailers. In the case of vehic le slide (over‑steer or under‑ steer situations), the system will reduce the throttle and then brake one or more of the “four corners” of the vehicle (in addition to potentially applying the trailer brakes) , thus applying a counter‑force to better align the vehicle with an appropriate path of travel.

For example, in an over ‑steer situation, the system applies the “outside” front brake; while in an under‑steer condition, the “inside” rear brake is applied. (See Figure 13)

IMPORTANT SAFETY INFORMATION ABOUT THE BENDIX® ESP® SYSTEM

The Bendix ESP EC-80 Controller may reduce the vehicle speed automatically.

The Bendix® ESP® system can make the vehicle decelerate automatically and can slow the vehicle w ith or wit h o ut the operator

applying the brake — and even when the

throttle is being applied.

T o minimize une xpected deceleration and reduce the risk of a collision, the operator must:

• Avoid aggressive driving maneuvers, such as sharp turns or abrupt lane changes at high speeds, which might trigger the stability system; and

• Always operate the vehicle safely, drive defensively , anticipate obstacles and pay attention to road,

weather and trafc conditions. Bendix ABS, ATC

and ESP systems are no substitute for prudent, careful driving.

Towing Doubles Or Triples May Reduce The Effectiveness Of Stability Systems

The Bendix ESP syst em wi t h th e EC-80 Con t roll er i s designed and optimized for trucks and for tractors that tow single trailers. If a tractor equipped with Bendix ESP is used to powe r multiple trail er combination s (known as “doubl es” or “trip les”) the eff ectiveness of the Bendi x ESP system may be greatly r educed. Extremely careful driving is always required when towing doubles or triples. Excessive speed and

aggres s i v e ma n e uv e r s — such as sha r p tu r ns , su d den steering inputs, or abrupt lane changes — should be

avoided.

Limitations Of Stability Systems

The effectiveness of the Bendix ESP system with the EC‑80 Controller may be greatly reduced if:

• The load shifts due to improper retention, accident damage, or the inherently mobile nature of some loads (for example, hanging meat, live animals or partially laden tankers),

• The vehicle has an unusually high — or off‑set — center of gravity (CG),

• One side of the vehicle drops off the pavement at an angle that is too large to be counteracted by a reduction in speed,

• The vehicle is used to haul double or triple trailer combinations,

• If very rapid steering changes are attempted at high speeds,

• There are mechanical problems with suspension leveling of the tractor or trailer resulting in uneven loads,

• The vehicle is maneuvering on a high banked road creating either additional side forces due to the weight (mass) of the vehicle, or a deviation between expected & actual yaw rates,

• Gusty winds are strong enough to cause signicant

side forces on the vehicle and any towed vehicles.

To Maximize The Effectiveness Of The Bendix®

System with the EC-80™ Controller:

ESP

• Loads must be properly secured at all times.

• Drivers need to exercise extreme caution at all times, plus avoid sharp turns, sudden steering adjustments or abrupt lane changes at high speeds, particularly if:

› the vehicle hauls loads that could shift; › the vehicle or load has a high or off‑set center of

gravity (CG) when loaded; or

› the vehicle tows doubles or triples.

Truck Chassis Modications

If the vehicle’s chassis components are altered (for example, a wheel base extension or reduction; tag axle addition or rem oval; a major body change suc h as conversion of a tractor into a truck; or an axle, suspension,

or steering system component modication) the Bendix

ESP

system must be disabled. Have a qualied mechanic

replace the Bendix ESP EC‑80 Co ntr o lle r w it h a B e ndi x®

ESP

ATC EC‑80™ Controller and secure the X4 connector (which will no longer be used). The ATC/ESP indicator lamp would continue to function as an A TC indicator lamp, and should be designated as ATC only.

If a modied vehicle does not have the Bendix

ESP® system disabled, serious vehicle braking and performance issues could result, including unnecess ary ESP syst em inter vention s. This can lead to a loss-of-control of the vehicle.

In addition, remove all cab signage (e.g. visor labels, etc.) that were used to show that the Bendix ESP system was installed. Make any necessar y notations in the vehicle manual(s), so that drivers do not misunderstand which ABS options are installed on the vehicle.

Sensor Location Modications

The location and orientation of the Steering Angle Sensor and Y aw Rate Sensor must not be altered. When servicing, an identical component must be used in the same orientation (using OEM brackets & torque requirements). During installation follow the OEM leveling guidelines.

Steering Angle Sensor Re-Calibration

Whenever maintenance or repair work is performed to the steering mechanism, linkage, steering gear, adjustment of the wheel track, or if the steering angle sensor is replaced, a recalibration of the Steering Angle Sensor must be performed.

If the Steering Angle Sensor is not recalibrated, the yaw control system ma y not function properly, which can result in incidents leading to loss of vehicle control. See page 19 of this document for more

details on this procedure.

DYNAMOMETER TEST MODE

Bendix ATC and ESP systems must be disabled prior to conducting any dynamometer testing. When the Dynamometer Test Mode is engaged, the Bendix ATC EC‑80 Controller's brake control and engine control — along with drag torque contr ol and Bendix ESP system functions — are disabled. This test mode is used to avoid torque reduction or torque increase and brake control activation when the vehicle is operated on a dynamometer for testing purposes.

The Dynamometer Test Mode may be activated by pressing

and releasing the diagnostic Blink Code Switch ve times

or by using a hand‑held or PC‑based diagnostic tool. During Dynamometer Test Mode the AT C lamp remains ON. Bendix ESP EC‑80 Controllers will remain engaged in

the Dynamometer Test Mode even if power to the ECU is removed and re‑applied. To exit the test mode, press and release the Blink Code S witch three time s, or use a hand‑held or PC‑based diagnostic tool.

AUTOMATIC TIRE SIZE CALIBRATION

The ECU requires a precise rolling circ umference ratio between steer axle and dr ive axle tires in order for the Bendix ABS, ATC, and ESP systems to perform in an optimal manner. For this reason, a continuously monitoring process takes place in which the precise ratio is calculated. This calculated value is stored in the ECU memory provided the following conditions are met:

1. Rolling‑circumference ratio is within the permissible range;

2. Vehicle speed is greater than approximately 12 mph/19 kph;

3. No acceleration or deceleration is taking place; and

4. There are no active speed sensor Diagnostic Trouble Codes (DTCs).

The ECU is provided with a ratio value of 1.00 as a default setting. If the automatic tire size alignment c alculates a

different value, this is used to overwrite the original gure

in the memor y. This process adapts t he ABS and ATC function to the vehicle.

Acceptable Tire Sizes

The speed calculatio n for an exciter ring with 100 teeth is based on a default tire size of 510 revolutions per mile.

This gure is based on the actual rolling circumference of

the tires, which varies with tire size, tire wear, tire pressure, vehicle loading, etc.

The ABS response sensitivity is reduced when the actual rolling circumference is excessive on all wheels. For a 100 tooth exciter ring, the minimum number of tire revolutions per mile is 376, and the maximum is 665. T he ECU will set a Diagnostic Trouble Code (DTC) if the number of revolutions is out of this range.

In addition, the size of the steer axle tire s compared to the drive axle tires als o has to be within t he A BS system design. To avoid DTCs, the ratio of the effective rolling circumference of the steer a xle, divided by the effective rolling circumference of th e drive axle, must be bet ween

0.85 to 1.15.

Drive Axle/Additional Axle Wheel Speed Sensor DTC

The Bendix ATC and E SP systems are disabled. In a four sensor system, ABS on the affected wheel is disabled, but ABS on all other wheels remains active.

In a six sensor system, ABS remains active by using input from the remaining rear wheel speed sensor on the same side.

ATC Modulator DTC

The Bendix ATC and ESP systems are disabled. ABS remains active.

J1939 Communication DTC

The Bendix ATC and ESP systems are disabled. ABS remains active.

ECU DTC

The Bendix ABS, ATC, and ESP systems are disabled. The system reverts to normal braking.

The Bendix® ESP® system with t he EC- 80 Cont roller effectiveness relies on the accuracy of vehicle speed.

If a major ch a n g e on the tire siz e s is ma d e — su c h that

the odometer setting needs to be changed to correct

for the new tires — the Bendix ESP EC-80 Controller's

setting o f tire sizes must al so be reprogramme d to revised values.

SYSTEM IMPACT DURING ACTIVE DIAGNOSTIC TROUBLE CODES (DTCs)

ABS PARTIAL SHUTDOWN

Depending on which component the DTC is detected, the Bendix ABS, ATC, and ESP system functions may be fully or partially disabled. Even with the ABS indicator lamp illuminated, the Bendix ESP EC‑ 80 Controller m ay still provide ABS function on wheels that are not affected. The ABS system Controller shoul d be servic ed as soon as possible.

Steer Axle ABS Modulator DTC

ABS on the affected wheel is disabled. ABS and ATC on all other wheels remains active. The Bendix ESP system with the EC‑80 Controller is disabled.

Drive Axle/Additional Axle ABS Modulator DTC

ATC is disabled. ABS on the af fec ted wheel i s disabled. ABS on all other wheels remains active. The Bendix ESP EC‑80 system is disabled.

Steer Axle Wheel Speed Sensor DTC

The wheel with the DTC is still controlled by using input from the remaining wheel speed sensor on the steer axle. ABS remains active on the rear wheels. The Bendix ATC and ESP systems are disabled.

Voltage DTC

While voltage is out of range, Bendix ABS, A TC, and E SP systems are disabled. The system reverts to normal braking. When the co rrect voltage level is restored, full ABS and ATC function is available. The operating voltage range is 9.0 to 17.0 VDC for 12 volt systems, and 20 to 33.5 volts for 24 volt systems.

Steering Angle Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

Yaw Rate/Lateral Acceleration Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

Brake Demand Pressure Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

Load Sensor DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

Steer Axle Traction Control Valve (TCV) DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

Trailer Pressure Modulator Valve (PMV) DTC

The Bendix ESP system is disabled. Bendix ABS and ATC systems remain active.

SYSTEM RECONFIGURATION

The Bendix® ESP® EC‑ 80™ Controller is designed to allow the technician to change the default system settings (chosen by the vehicle OEM) to provide additional or customized features.

Depending on the model, the customizable features include ABS control settings, engine module c ommunication etc.

Many of these settings can be recongured using a hand‑

held or PC‑ based sof t ware, such as t he Bendix® ACom® Diagnostic software.

ECU RECONFIGURATION

Reconguring a Bendix ESP EC‑80 Controller may be

carried out by using the B link Code S witch or by using a hand‑held or PC‑based diagnostic tool.

Note: During the reconfiguration process — and

independently from any reconguration being carried out

by the technician — the Electronic Control Unit (ECU) will automatically check the J1939 serial link and communicate with other vehicle modules. In particular, if the serial link shows that the vehicle has a retarder device present, the

ECU will congure itself to communicate with the retarder

device for improved ABS per formance. For example, if the ECU detects the presence of a retarde r disable r elay

during a reconguration, it will congure itself to control the

relay to disable the retarding device as needed.

DATA STORAGE

Depending on the product type and version, Bendix® brand ECUs may store data related to troubleshooting, diagnostics, service needs, vehicle system operating status, and vehicle operator inputs. No personally identifying data (e.g. name, gender or age) is recorded. Bendix will not acces s stored ECU data or share it with others except: with the consent of the vehicl e owner; in

response to an ofcial request by law enforcement or

other governmental agency; as par t of Bendix’s defense of litigation; or, as otherwise required by law. Data that Bendix receives may also be used for research purposes or made available to others for research purposes, where

a need is shown and the data is not linked to a specic

vehicle or owner. Bendix brand antilock ECUs are not designed to store

data for purposes of acc ident rec onstruc tion and Bendi x ACom Diagnostic Software is not intended to retrieve data for purposes of accident reconstruction. Bendix makes no representations as to the acc uracy of data retrieved and interpreted from Bendix ECUs for purpose s of accident reconstruction.

Reconguration Using the Blink Code Switch

With ignition power removed from the Bendix ESP EC‑80 Controller, depress the Blink Code Switch. After the ignition power is activated, depress and release the switch

seven (7) times to initiate a reconguration event.

Diagnostic Tool

A reconguration event may be initiated using a hand‑held

or PC‑based diagnostic tool to communicate with the ECU over the SAE J1939 diagnostic link.

6S/5M Conguration

A Bendix ESP EC‑80 Controller will congure for 6S/5M operation when a reconguration event is initiated, and the

ECU detects that an additional‑axle Pressure Modulating Valve (PMV) is wired as follows:

PMV Connector ECU Connector

Hold Right Additional Axle Hold Release Left Additional Axle Release Common Right Additional Axle Common

Troubleshooting: General

GENERAL SAFETY GUIDELINES

Read and follow the General Safety Guidelines shown on page two (2) of this document.

REMOVAL OF THE BENDIX® ESP® EC-80™ CONTROLLER ASSEMBL Y

1. Turn vehicle ignition off.

2. Remove as much contamination as possible prior to disconnecting electrical connections.

3. Note the Bendix ESP EC‑80 Controller assembly mounting position on the vehicle.

4. Disconnect the electrical connectors from the Controller.

5. Remove and retain the mounting bolts that secure the Controller.

The VIN of th e vehicle is stored in the Be ndix ESP EC-80 Controller's internal memor y, and is crosschecked by the E lectronic Co ntrol Unit (ECU) using information obtained from other vehicle Controller( s). If the VI N stored i n the ECU doe s not match t he VI N obtained from the other vehicle Controller(s), the ECU will generate an ECU Internal VIN Mismatch Diagnostic Trouble Code (DTC).

Accordingl y, d o not attempt to move a Bend ix ESP EC-80 Controller from one vehicle to another.

OBTAINING A NEW BENDIX® ESP® EC-80™ CONTROLLER

Should the Bendix ESP EC‑80 Controller require replacement, certain steps must be followed:

1. Record the vehicle model, VIN, year and date of manufacture from the vehicle.

2. Record the part number of the Bendix ESP EC‑80 Controller.

3. Provide this information to your local OEM vehicle service department to obtain a new Bendix ESP EC‑80 ECU. The OEM service department will install the same parameter set in the new Controller that was loaded into the original ECU at the vehicle OEM assembly facility .

INSTALLING A NEW BENDIX ESP EC-80 CONTROLLER

When replacing the Bendix ESP EC-80 Controller, verif y with the OEM service depart ment that the unit you are installing has the correct parameter set. Failure to do so could re sult in a loss of f eature s or degraded ESP performance.

For further information, contact either the vehicle manufacturer, Bendix, or your local authorized Bendix distributor.

1. Position and secure the Bendix ESP EC‑80 Controller in the original mounting orientation using the mounting bolts retained during removal. Use no more torque than

is necessary to rmly secure the ECU into position.

Over‑tightening the mounting hardware can cause damage to the Bendix ESP EC‑80 Controller.

2. Reconnect the electrical connectors to the Bendix EC‑80 Controller.

3. Apply power and monitor the Bendix ESP EC‑80 Controller power‑up sequence to Verify the proper system operation.

See Troubleshooting: Wiring section beginning on page 45 for more information on wire harnesses.

The Bendix ESP system with the EC-80 Controller is

validated with specic Bendix

Always use Bendix brand replacement parts to prevent compromising system performance. Bendix is not a ble t o validat e th e safe an d relia ble use of substitute or alternate components that may be available f rom other ma nufactu rers, since supplier s of a non-Ben dix brand ABS com ponent may implement design changes in their component (without the knowledge or approval of Bendix) which could negatively af fect antilock system reliabilit y and braking performance issues.

brand components.

STEERING ANGLE SENSOR MAINTENANCE

Service Checks:

1. Check all wiring and connectors. Some installations also include an intermediate connector from the steering angle sensor to the main vehicle wire harness. Make sure all connections are free from visible damage.

2. Examine the sensor. Make sure the sensor, its mounting screws, and the interface between the hub and the steering column are not damaged.

Diagnostics:

The Bendix in conjunction with a Bendix® ESP® EC‑80™ Controller. No independent diagnostics can be performed on the sensor.

See pages 38-39 for Diagnostic Trouble Codes (DTCs) associated with this device.

Removal:

1. Remove steering column sheathing.

2. Depending upon manufacturer, the steering angle sensor could be located either near the steering wheel, necessitating the removal of the steering wheel, or near the joint to the vehicle steering mechanism, necessitating the disconnection of this linkage.

3. Unplug sensor cable assembly from body of sensor. Squeeze the mounting tabs and pull gently on the connector until it disengages.

4. Unscrew all three of the mounting screws that hold the body of the sensor to the steering column body.

5. Slide the sensor over the column to remove. Take note if the sensor label is facing upward or downward.

Installation:

1. Obt ain a new senso r. The sensor is not repairable in

the eld.

2. Slide the sensor over the column. The center hub of the sensor must be aligned with the c o r re sp onding n otch in the column. Dif ferent column manufacturers may implement this hub alignment in dif ferent ways. The sensor label should be facing in the same direction as the removed sensor.

brand steering angle sensor is only operational

3. Assemble to column non‑moving plate with three self‑ locking screws.

4. Tighten screws to steering column manufacturer's

recommended torque specication.

5. Reconnect the connector. Ensure that there will be no force applied to the sensor be cause the c onnec tor is pulling on the sensor body.

6. If the wire harness leading to the sensor is being replaced, ensure that it is adequately tie wrapped so that the full motion of the steer ing column can b e achieved without pulling apart the connectors.

7. Reinstall the column sheathing. The sensor is not protected against dirt or water intrusion, so care must be taken not to introduce these elements during installation.

STEERING ANGLE SENSOR CALIBRATION

The steering angle sensor calibration can only be achieved when the sensor is powered by the Bendix ESP EC‑ 80 Controller. No stand‑alone sensor calibration can be carried out. The calibration procedure is performed using Bendix® ACom® Diagnostic software V6.7. 2.5 or higher. See “Troubleshooting Diagnostic Trouble Codes:

Steering Angle Sensor (Bendix® SAS-60™)” for the calibration procedure using this tool. The sensor must be

recalibrated using ACom Diagnostic Software after any of these situations:

• Replacement of the steering angle sensor;

• Any opening of the connector hub from the steering angle

sensor to the column;

• Any maintenance or repair work on the steering linkage,

steering gear or other related mechanism;

• Adjustment of the wheel alignment or wheel track; or

• Af ter an accident that may have led to damage of the

steering angle sensor or assembly

If the steering angle sensor is not properly recalibrated as needed, the yaw control system may not funct io n p roperly, which can re sul t in a l o ss o f vehicle control.

Y AW RA TE/LATERAL ACCELERA TION SENSOR MAINTENANCE

Different generations of yaw rate/lateral acceleration sensors are not compatible. Only replace these sensors with exactly the same device.

Service Checks:

1. Check all wiring and connectors. Make sure all connections are free from visible damage.

2. Examine the sensor. Make sure the sensor, its mounting bolts, and the mounting bracket are not damaged.

3. Check t he vent hole in under body of sens or housing. The vent hole should remain free from paint and debris at all times.

Diagnostics:

The yaw rate sensor is only operational in conjunction with a Bendix® ABS, ATC or ESP® system with the EC‑80 Controller. No independent d iagnostics can be performed on the sensor. See pages 40-41 for Diagnostic Trouble

Codes associated with this device.

Removal:

1. Unplug the sensor cable assembly from body of sensor. The connector must be t wisted and pulled gently to release.

2. In some mounting congurations, the sensor can be

removed independently from its mounting bracket. Otherwise, remove entire assembly, then remove sensor from bracket.

3. Take note of the direction in which th e connector is pointed.

Installation:

1. Obt ain a new senso r. The sensor is not repairable in

the eld.

The location of the Yaw Rate Sensor on the vehicle, the means o f fa ste ning t he un it to t he vehi cle , and the sensor's orien t at io n, M UST NOT BE A LTERED. When ser vicing, an ident ical component mu st be used in the sa me or ien tat ion (using OE M brac kets & torque requirements). During installation, follow the OE M leveling guidelin es. If any of the se requirements are not followed, the Bendix ESP system may not function properly, which can result in incidents leading to loss of vehicle control.

™

2. Assembly yaw rate sensor housing to mounting bracket. The bracket must be the same design as used on the

original vehicle conguration.

3. For Bendix® YAS‑60™ Yaw Rate Sensors, the correct

fasteners are three M8 size bolts, and the xing torque

should be 20 Nm (±2 Nm). For Bendix® Y AS‑70X™ Yaw Rate Sensors, the correct fasteners are two M10 size bolts (1.5 mm pitch angle), or OEM‑supplied hardware,

and the xing torque should be 46 Nm (±9 Nm). Note

that the Bendix YAS‑70X sensor has two alternate designs, one with an aligning post — see the kit instruction sheet for more information. In all cases, the connector should be facing in the same direction as the removed sensor. The unit must not be installed upside‑down where there is a pressure‑balancing hole.

4. The sensor should be as level as possible and parallel to the road surface when installed on the vehicle.

5. Reconnect the connector. Ensure that there will be no force applied to the sensor be cause the c onnec tor is pulling on the sensor body.

When removing o r installing the sensor, care must be used to prevent damage. Do not strike or pr y the sensor. Do not use an imp act tool to in stall th e mounting hardware.

Sensor Location Modications

The location and orientation of the Yaw Rate Sensor must not be altered. When servi cing, an identical c omponent must be used in the same orientation (using OEM brackets & torque requirements). During installation follow the OEM leveling guidelines.

Yaw Rate Sensor Calibration:

The yaw rate sensor calibration can only be achieved via the Bendix ESP system with the EC‑ 80 Controller. The sensor must be recalibrated after any of these situations:

• Replacement of the sensor

• Af ter an accident that may have led to damage of the

yaw rate sensor

The calibration procedure is performed using Bendix ACom® Diagnostic Software V6.7.2.5 or higher.

See “Troubleshooting Diagnostic Trouble Codes: Y aw Rate Sensor” for the calibration procedure.

BRAKE DEMAND SENSOR CALIBRATION

Calibration must be performed under the following conditions:

• After servicing any pressure sensor related Diagnostic Trouble Codes (DTCs)

• Replacement of any sensor

The calibration procedure is performed using Bendix® ACom® Diagnostic Software V6.7.2.5 (or higher).

See “Troubleshooting Diagnostic Trouble Codes: Brake Demand Sensor/Load Sensor” for the calibration procedure.

PRESSURE SENSOR INSTALLATION REQUIREMENTS

Service Checks:

1. Check all wiring and connectors. Make sure all connections are free from visible damage.

2. Examine the sensor. Make sure the sensor and its interface to the pressure location are not damaged.

Diagnostics:

See the test diagram supplied by the Bendix ACom Diagnostic Software. The pressure sensor can be

independently diagnosed when supplied with a ve volt

voltage supply to the B location and ground to the A location shown in the test diagram. Signal output on the C location shoul d read approximately 0.5V if t here is no pressure applied. The signal outp ut should increase proport ionately as pres sure is applie d, up to a maximum of 4.5V at 150 psi.

Removal:

1. Unp lug sensor cable assembly f rom body of sensor. Pull gently on the mounting tab and co nnector until it disengages.

2. Remove sensor from its pressure mounting using

approved air brake push in tting tools.

Installation:

1. Obt ain a new senso r. The sensor is not repairable in

the eld.

2. Insert sensor into pressure tting using approved tools.

3. Reconnect the connector. Ensure that there will be no force applied to the sensor be cause the c onnec tor is pulling on the sensor body.

4. If the wire harness leading to the sensor is being replaced, ensure that it is adequately tie wrapped.

Pressure Sensor Calibration:

There is no need for pressure se nsor calibr ation as long as the part replaced is identical to the part removed and a component approved for use with the Bendix® ESP® system with EC‑80™ Controllers. However, replacement of brake demand sensors or clearing of demand pressure sensor related DTCs require the following:

1. Use Bendix ACom Diagnostic Sof tware V6.7.2.5 (or higher) to clear the active pressure sensor DTC.

2. Carrying out the demand pressure sensor initialization procedure which involves applying ser vice brakes of 90 psi or greater for three (3) seconds (while stationary).

Once this procedure is carried out successfully, if there are no other active DTCs, the A T C/ESP indicator lamp will no longer be illuminated.

Troubleshooting: Blink Codes and Diagnostic Modes

ELECTRONIC CONTROL UNIT (ECU) DIAGNOSTICS

The Bendix® ESP® EC‑80™ Controller contains self‑testing diagnostic circuitry that continuously checks for the normal operation of internal components and circuitry, as well as external ABS components and wiring.

Active Diagnostic Trouble Codes (DTCs)

When an erroneous system condition is detected, the Bendix ESP EC‑80 Controller:

1. Illuminates the appropriate indicator lamp(s) and disengages part or all of the Bendix ABS, ATC and ESP system functions. (See ABS Partial Shutdown,

on page 15.);

2. Places the appropriate DTC information in the Electronic Control Unit (ECU) memory; and

3. Communicates the appropriate DTC information over the serial communications diagnostic link as required. Hand‑held or PC‑based diagnostic tools attach to the vehicle diagnostic connector, typically located on or under the dash (see Figure 14).

BLINK CODES

Blink codes allow a technician to troubleshoot ABS problems without using a hand‑held or PC‑based diagnostic tool. Instead, information about the ABS system is communicated by the Bendix ESP EC‑80 Controller using the ABS indicator lamp to display sequences of blinks.

Note: The Bendix ESP EC-80 Controller will not enter the diagnostic blink co de mode if the wheel speed sensors show that the vehicle is in motion. If the ECU is in the diagnostic blink code mode and then detects vehicle motion, it will exit the blink code mode.

In addition, by operating the Blink Code Switch as described below, one of several diagnostic modes can be entered. See Diagnostic Modes below.

Blink Code Switch Activation

When activating the Blink Code Switch:

1. Wait at least two seconds after “ignition on.” (Except

when entering Reconguration Mode ‑ see System

Reconguration section on page 16.)

2. For the Bendix ESP EC‑80 Controller to recognize that the switch is activated “on,” the technician must press

for at least 0.1 seconds, but less than ve (5) seconds. (If the switch is held for more than ve (5) seconds, the

ECU will register a malfunctioning switch.)

3. Pauses between pressing the switch when a sequence is required, (e.g. when changing mode) must not be longer than two (2) seconds.

4. After a pause of three‑and‑a‑half (3.5) seconds, the ECU will begin responding with output information blinks. See Figure 15 for an example.

FIGURE 14 - TYPICAL VEHICLE DIAGNOSTIC CONNECTOR LOCATIONS (J1939)

FIGURE 15 - EXAMPLE OF A BLINK CODE MESSAGE

Blink Code Timing

The Bendix® ESP® EC‑80™ Controller responds with a sequence of blink codes. The overall blink code response from the Electronic Control Unit (ECU) is called a “message.” Each message includes, depending on the mode selected by the technici an, a sequence of one or more groups of blinks. Simply record the number of blinks for each sequence and then use the troubleshooting index on page 26 for active or inactive Diagnostic T rouble Codes (DTCs) and you will be directed to the page that provides troubleshooting information.

NOTE:

1. Sequences of blinks illuminate the ABS indicator lamp for half a second, with half‑second pauses between them.

2. Pauses between blink code digits are one‑and‑a‑half (1.5) seconds.

3. Pauses between blink code messages are two‑and‑a‑ half (2.5) seconds.

4. The lamp remains on for ve (5) seconds at the end of

messages.

Once the ABS indicator lamp begins displaying a sequence of codes, it continues until all blink c ode m essag es have been displayed and then returns to the normal o perating mode. During this time, the Bendix ESP EC‑80 Controller will ignore any additional Blink Code Switch activation.

All DTCs, with the exception of voltage and J1939 DTCs, will remain in an active state for the remainder of the power cycle.

Voltage DTCs will clear automatically when the voltage returns within the required limits. All Bendix ABS functions will be re‑engaged.

J1 939 DTCs will clear automatically when communications are re‑established.

DIAGNOSTIC MODES

In order to communicate with the Bendix ESP EC‑80 Controller, there are several modes that the technician can select to allow information to b e retrieved, or other ECU functions to be accessed.

Diagnostic Modes

To enter the various diagnostic modes:

No. of

Times to

Press the

Blink Code

Switch

1 Active Diagnostic T rouble Code (DT C) Retriev al 2 Inactive DTC Retrieval 3 Clear Active DTCs 4 System Conguration Check 5 Dynamometer Test

7* Recongure ECU

* To enter the Reconguration Mode, the switch must be held

in before the application of ignition power. Once the power is supplied, the switch is released and then pressed se ven times.

FIGURE 16 - DIAGNOSTIC MODES

Active Diagnostic Trouble Code Mode

For troubleshooting, typically the Active and Inactive DTC Retrieval Modes are used. The technician presses the Blink Code Switch o nce and the A BS indicator lamp

ashes a rst group of two codes, and if there are more

DTCs recorded, this is followed by a second set of codes, etc. (See page 26 for a director y of these codes.) All active DTCs may also be retrieved using a hand‑held or PC‑based diagnostic tool, such as the Bendix® ACom® Diagnostic Software.

To clear active DTCs (as problems are xed), simply

clear (or “self‑heal”) by removing and re‑applying ignition power. The only exception is for wheel speed sensor DTCs, which clear when power is removed, re‑applied, and the ECU detects valid wheel speed from all wh eel spe ed sensors. Alternately, codes may be cleared by pressing the diagnostic Blink Code Switch three (3) times (to en t er the Clear Active Diagnostic Trouble Code Mode) or by using a hand‑held or PC ‑based diagno stic tool. Hand‑ held or PC‑based diagn ost ic too ls are ab le to c lear w he el spe ed sensor DTCs without the vehicle being driven.

System Mode Entered

Inactive Diagnostic Trouble Code Mode

The Bendix® ESP® EC‑80™ Controller stores past Diagnostic Trouble Codes (DTCs) and c omments (such

as conguration changes) in its memory. This record is

commonly referred to as “event history.” When an active DTC is cleared, the Electronic Control Unit (ECU) stores it in the event history memory as an inactive DTC.

Using blink codes, the techni cian may review all inactive DTCs stored on the ECU. The ABS indicator lamp will display inactive diagnostic blink codes when the diagnostic Blink Code Switc h is depres sed and release d two times. See page 26 for the index showing DTCs and

the troubleshooting guide page to read.

Inactive DTCs, and event history, may be retrieved and cleared by using a hand‑held or PC‑based diagnostic tool, such as the Bendix® ACom® Diagnostic Software.

Clearing Active DTCs

The ECU will clear active DTCs when the diagnostic Blink Code Switch is depressed and released three (3) times.

System Conguration Check Mode

The ABS indicator lamp will display system conguration

information when the diagnostic Blink Code Switch is depressed and released four t imes. The lamp will blink

out conguration information codes using the following

patterns. (See Figure 17). In this mode the ECU tells the technician — by means of a

series of seven (7) blink codes — the type of ABS system that the ECU has been set up to expect. For example, if the fourth blink code is the number two (2) , the technician

knows that a 6S/4M sensor/modulator conguration has

been set.

Dynamometer Test Mode

The Dynamometer Test Mode is used to disable Bendix® ESP® & ATC system functions when needed (e.g. when performing any vehicle maintenance where the wheels are lifted of f the ground an d moving, including dy namometer testing). Note: For Bendix ESP and ABS EC‑80

Controller s, this mode will remain engage d even if power to the ECU is r emoved and r e‑ap pli ed . To exit

the Dynamometer Test Mode, press and release the Blink Code Switch three (3) times, or use a hand‑ held or PC‑ based diagnostic tool.

1st Number System Power

1 12 Volts

2nd

Number

4 4 Sensors 6 6 Sensors

3rd Number Pressure Modulator Valves

4 4 Modulators 5 5 Modulators 6 6 Modulators

4th Number ABS Conguration

1 4S/4M or 6S/6M 2 6S/4M 3 6S/5M

5th Number Traction Control Conguration

2 No ATC 3 ATC Engine Control Only 4 ATC Brake Control Only 5 Full ATC (Engine Control & Brake Control)

6th Number Retarder Conguration

1 No Retarder 2 J1939 Retarder 3 Retarder Relay 4 J1939 Retarder, Retarder Relay

7th Number Stability Conguration

1 No Stability Program 2 Electronic Stability Program (ESP)

FIGURE 17 - SYSTEM CONFIGURATION CHECK

Wheel Speed Sensors

Recongure ECU Mode

Controller reconfiguration is carried out by using the

Recongure ECU Mode. (See page 16.)

Note: To enter the Reconguration Mode, the Blink Code

Switch must be held in before the app lication of ignition power. Once the power is supplied, the switch is released and then pressed seven times.

Other Methods

Troubleshooting and DTC clearing (as well as recongura‑ tion) may also be carried out using hand‑held or PC‑based diagnostic tools such as the Bendi x® Remote Diagnostic Unit (RDU™), Bendix ACom Diagnostic Software, or similar tools.

Troubleshooting: Using PC-Based or

Hand-Held Diagnostic Tools

BENDIX® ACOM® DIAGNOSTIC SOFTWARE

FIGURE 18 - BENDIX® ACOM® DIAGNOSTICS

Bendix® ACom® Diagnostic Software is a PC‑based program and is designed to meet RP‑1210 industry standards developed by the Truck Maintenance C ouncil (TMC). This software provides the technician with access to all the available Bendix® EC‑ 80™ ESP® Controller's diagnostic information and configuration capability, including:

• ECU information;

• Diagnostic Trouble Codes (DTCs) and repair

information;

• Conguration (ABS, ATC, and more);

• Wheel speed information;

• Perform component tests; and

• Save and print information

Note: Bendix ACom Diagno st ic Softwar e V6 .7.2.5 (or higher) is required to calibrate the Steering Angle Sensor, the Yaw Rate/Lateral Acceleration Sensor, the Brake Demand Sensors and the Load Sensor.

When using ACom Diagnostic Software V6.7.2.5 (or higher) to diagnose the Bendix ESP EC‑80 Controller, the computer’s serial or parallel p ort ne eds to be connected to the vehicle’s diagnostic connector.

BENDIX® RDU™ (REMOTE DIAGNOSTIC UNIT)

The Bendix® RDU™ tool (Bendix part number K 101596N001) provides the technician with a visual indication of Antilock Braking System (ABS) component Diagnostic Trouble Code (DTC) information. Note: Previous versions of the

RDU tool are not compatible with the Bendix ESP EC-80 Controller. The Bendix RDU tool is specically designed

for use with Bendix® brand ABS systems and Bendix makes no claims for its operation and/or usability with other brands of ABS systems.

LED lights

illuminate

Diagnostic

Trouble

Codes

(10 locations

in total)

FIGURE 19 - THE BENDIX® REMOTE DIAGNOSTIC UNIT

Features of the Bendix RDU Tool

The Bendix RDU tool at taches to the 9‑pin diagnostic connector in the cab of the vehicle.

The Bendix RDU tool allows the technician to:

• Troubleshoot ABS system component problems using

DTC reporting via LEDs;

• Reset DTCs on Bendix ESP EC‑80 Controllers by

holding a magnet over the reset in the center of the RDU tool for less than six (6) seconds; and

• Enter the Self‑Conguration Mode used by Bendix ESP

EC‑8 0 Controlle rs by holding a magnet over the reset area for greater than six (6) seconds but less than 30 seconds.

How the Bendix RDU Operates

See Figure 14 for typical vehicle connector locations.

When the Bendix RDU tool is plugged into the diagnostic connector, all the LEDs will illuminate, and the green LED

will ash four (4) times to indicate communications have

been established. If the Bendix ESP EC‑ 8 0 Contro ller has no act ive DTCs,

only the green LED will remain illuminated. If the Bendix ESP EC‑80 Controller has at least one active

DTC, the RDU tool displays the rst DTC by illuminating the

red LEDs, indicating the malfunc tioning A BS c omponent and its location on t he vehicle (See Figure 20.) If t here are multiple DTCs on the ABS system, the RDU tool will

display one DTC rst, then — once that DTC has been

repaired and cleared — the next code will be displayed.

Typical Combination

Diagnostic Trouble Codes (DTCs) are:

• Right steer sensor

• Left steer sensor

• Right drive sensor

• Left drive sensor

• Right additional sensor

• Left additional sensor

• Right steer modulator

• Left steer modulator

• Right drive modulator

• Left drive modulator

• Right additional

modulator

• Left additional modulator

• Rear Axle Traction

modulator

• ECU

• Engine serial

communication

• MOD red LED illuminated, shows the "Common"

connection of one o r more modulators is shor ted to battery or ground

• VLT (Flashing indicates either over‑ or under‑voltage

condition)

To pinpoint the root cause and to ensure the system

Diagnostic Trouble Code is properly corrected the rst time,

additional troubleshooting may be necessary.

Note: The Bendix® RDU™ tool is not capable of diagnosing certain Bendix® ESP® EC-80™ system-specific DTCs including additional sensors: steering angle sensors, yaw sensors, pressure sensors, or modulator valves (trailer pressure modulating valves or front axle trac tion control valves.)

LED DIAGNOSTIC TROUBLE CODES

LFT ‑ Left RHT ‑ Right DRV ‑ Drive Axle ADD ‑ Additional STR ‑ Steer Axle VLT ‑ Power ECU ‑ ABS Controller

Example: If the Diagnostic Trouble Code is "Right Steer Axle Sensor", the Bendix RDU tool will display one green and three red LEDs

FIGURE 20 - DIAGNOSTIC TROUBLE CODES AS DISPLAYED ON THE BENDIX

SEN ‑ Wheel Speed Sensor MOD ‑ Pressure Modulator Valve TRC ‑ Traction Control

LEDs

Green

VLT

Red SEN STR RHT

RDU™ TOOL

Bendix® RDU™ Reset Function

The magnetic reset switch is located in t he center top of the Bendix RDU tool. Activation r equires a magnet with 30 gauss minimum.

The reset operations are:

1. If the magnet is held over the switch for less than 6 seconds the "clear current DTCs" command is sent.

2. If the magnet is held over the switch for more than 6 seconds, but less than 30 seconds, the Bendix ABS

"self‑conguration command" is sent.

Additionally, it is recommended at the end of any inspection that the user switches off and restores the power to the Bendix ESP EC‑ 80 Controller, then check the ABS Indicator Lamp operatio n and Bendix RDU tool to see if they indicate any remaining DTCs.

Bendix RDU Communication Problems

If the Bendix ESP EC‑80 Controller does not respond to the RDU tool’s request for DTCs, the RDU tool will illuminate each red LED in a clockwise pattern. This pattern indicates the loss of communication and will continue until the Bendix ESP EC‑8 0 C o ntr oll er re sp o nds an d communication has been established.

Possible sources of communication problems are:

1. A problem with the J1939 link at the in‑cab off‑board

diagnostic connector (9 or 6 Pin);

2. The Be ndix ESP EC‑80 Contro ller does not support

PID194;

3. No power is being supplied to the Bendix ESP EC‑8 0

Controller and/or the diagnostic connector;

4. The J1939 bus is overloaded with information and the

RDU can not arbitrate access; or

5. A malfunctioning Bendix RDU tool.

Other Information

For more information on Bendix® ACom® Diagnostics Software o r RP‑1210 compliant tools, go to ww w.bendix. com or visit your local authorized Bendix distributor.

See pages 56-62 for Appendices showing J1939 SID, FMI, codes and their Bendix blink code equivalents.

www.bendix.com

For the latest information, and for free downloads of the Bendix® ACom® Diagnostic Software, and its User Guide, visit the Bendix website at www.bendix.com.

Bendix Technical Assistance Team

For direct telephone technical support, call the Bendix technical assistance team at:

1-800-AIR-BRAKE (1‑800‑247‑2725 option 2, then 1) , Monday through Friday, 8:00 a.m. to 6:00 p.m. ET, and follow the instructions in the recorded message. E‑mail the Bendix Technical Assistance Team at:

techteam@bendix.com.

Active or Inactive Diagnostic Trouble Codes (DTCs):

INDEX

How to interpret the first digit of messages received when Active or Inactive Diagnostic Trouble Code Mode is entered.

1st Blink Code Number

1 ............................... No DTCs (1,1)

2 ............. Wheel Speed Sensors ‑ pages 27‑28

3 ............. Wheel Speed Sensors ‑ pages 27‑28

4 ............. Wheel Speed Sensors ‑ pages 27‑28

5 ............. Wheel Speed Sensors ‑ pages 27‑28

6 ........................Power Supply ‑ page 29

7 .......... Pressure Modulator Valves ‑ pages 30‑31

8 .......... Pressure Modulator Valves ‑ pages 30‑31

9 .......... Pressure Modulator Valves ‑ pages 30‑31

10 .........Pressure Modulator Valves ‑ pages 30‑31

11 ..........................J1939 ‑ pages 32‑33

12 ...................Miscellaneous ‑ pages 34‑35

13 ..............................ECU ‑ page 36

14 ............ Wheel Speed Sensors ‑ pages 27‑28

15 ............ Wheel Speed Sensors ‑ pages 27‑28

16 .........Pressure Modulator Valves ‑ pages 30‑31

17 .........Pressure Modulator Valves ‑ pages 30‑31

18 ....... Drive Axle Traction Control Valve ‑ page 37

19 .......Steer Axle Traction Control Valve ‑ page 37

20 ....Trailer Pressure Modulator Valve ‑ pages 30‑31

21 ............Steering Angle Sensor ‑ pages 38‑39

22 ................Yaw Rate Sensor ‑ pages 40‑41

23 ............Lateral Acceleration Sensor ‑ page 42

24 ..........Brake Demand/Load Sensors ‑ page 43

25 .................Valves Miscellaneous ‑ page 44

26 ...............J1939 ESP‑Related ‑ page 45‑47

Troubleshooting Tests

Example: For a message sequence of:

3, 2 12, 4

For the rst sequence go to page 27 and

for the second sequence go to page 34.

See Page 56-62 for APPENDIX B: J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents

Troubleshooting Diagnostic Trouble Codes (DTCs):

Wheel Speed Sensors

1st. Blink

Code

2 Left Steer Axle Sensor 3 Right Steer Axle Sensor 4 Left Drive Axle Sensor 5 Right Drive Axle Sensor 14 Left Additional Axle Sensor 15 Right Additional Axle Sensor

2nd. Blink Code

Location

Diagnostic Trouble Code Description

1 Excessive Air Gap

2 Output Low at

Drive‑off

3 Open or Shorted

Repair Information

Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum of 0.25 VAC sensor output at ~ 0.5 RPS . Verify the c onditi on of the sens or head. Verify the mount ing of t he exciter r ing an d co ndit ion of t he teet h. Verif y the p rop er bearing end‑play. Verify the condition and retention of the clamping sleeve. Verify the sensor lead routing and clamping.

Verify 1500 – 2500 ohms is found across the sensor leads. V erify no continuity between the sensor leads and ground or voltage. Verify no continuity between the sensor leads and the other sensors. Check for corroded/damaged wiring or connectors between the Electronic Control Unit (ECU) and the wheel speed sensor.

4 Loss of Sensor Signal

5 Wheel End

6 Erratic Sensor Signal

7 Tire Size Calibration

10 Conguration Error

Adjust the sensor to contact the exciter ring. Rotate the wheel and verify a minimum of 0.25 VAC sensor output at ~ 0.5 RPS. Verify the condition of sensor head. Verify the mounting of the exciter ring and condition of the teeth. Verify the proper bearing end‑play. V erify the condition and retention of the clamping sleeve. Verify the sensor lead routing and clamping. Check for corroded/damaged wiring or connectors between the ECU and the wheel speed sensor.

Verify the mounting of exciter ring and the condition of teeth. V erify the proper bearing end‑play. V erify the condition and retention of the clamping sleeve. V erify the sensor lead routing and clamping. Check the mechanical function of brake. Check for kinked or restricted air hoses.

Verify the correct tire size as desired. Verify the proper tire ination. Verify the correct

number of exciter ring teeth.

The ECU is congured for four sensors, but it has detected the presence of additional sensors. Verify the sensor wiring and the ECU conguration.

Speed Sensor Repair Tests:

1. Take all measurements at the Elec tronic C ontrol Unit (ECU) harness connector pins in order to the check wire harness and sensor. Probe the connector carefully so that the terminals are not damaged.

2. The wheel speed sensor measurements should read:

Location Measurement

Sensor Sensor to voltage or ground Open Circuit (no continuity) Sensor output voltage >0.25 of VAC sensor output at ~ 0.5 revs/sec.

3. Clear the DTC after the issue is corrected. The sensor DTC will remain until the power is cycled to the ABS ECU and vehicle is driven above 15 MPH or the DTC was cleared using either the diagnostic Blink Code Switch or a diagnostic tool.

Cab-mount ECU: Looking into the wire harness connector

1500 ‑ 2500 Ohms

Connector Pin

18 Way

15 Way

(if ECU is

congured for

6 sensors)

Wheel Speed Sensor Location

10 Right Drive Axle (+) 11

Right Drive Axle (‑)

5 Left Steer Axle (+)

Left Steer Axle (‑)

11 Right Steer Axle (+)

Right Steer Axle (‑)

14 15 Left Drive Axle (+)

Left Drive Axle (‑)

18 11 Left Additional Axle (+) 14

Left Additional Axle (‑)

12 Right Additional Axle (+)

Right Additional Axle (‑)

Troubleshooting Diagn ostic Trouble Codes (D TC s ): P ower S upply

1st. Blink

Code

6 Power Supply

2nd. Blink Code

Location

Diagnostic Trouble Code Description

Battery Voltage Too Low

Battery Voltage Too High

Measure the battery voltage under load. Check the vehicle battery and associated components. Check for damaged wiring. Check for damaged or corroded connectors and connections.

Measure the bat tery voltage under load. Ensur e that battery voltage is c orrect for the Electronic Control Unit (ECU). Check the vehic le batter y and associated

components. Check for damaged wiring. Check for damaged or corroded connectors and connections.

Power Supply Tests:

1. Take all measurements at the ECU harness connector.

2. Place a load (e.g. an 1157 stop lamp) across the battery or ignition and ground connection, measure the ignition and battery voltage with the load. Ignition to Ground should measure between 9 to 17 VDC. Battery to Ground should also measure between 9 to 17 VDC.

Repair Information

3. Check for damaged wiring, damaged or corroded connectors and connections.

4. Check the condition of the vehicle battery and associated components, verify that the ground connection is good and tightened.

5. Check the alternator output for excessive noise.

Cab-mount ECU: Looking into wire harness connector

Connector Pin Power Supply Test

18 Way

1 Ground 2 Ignition

16 Battery

Troubleshooting Diagnostic Trouble Codes (DTCs):

Pressure Modulator Valves (PMVs)

1st. Blink

Code

7 Left Steer Axle 8 Right Steer Axle 9 Left Drive Axle 10 Right Drive Axle 16 Left Additional Axle 17 Right Additional Axle 20 Trailer PMV

2nd. Blink Code

Location

Diagnostic Trouble Code Description

Release Solenoid Shorted to Ground

Release Solenoid Shorted to Voltage

Repair Information

Verify no co ntinuit y b et ween th e PMV l eads an d groun d. Verif y 4.9 to 5. 5 ohms from REL to CM N & H LD to C M N , and 9. 8 to 11 ohms from REL to HLD. Chec k

for corr oded/dama ged wir ing or c onnecto rs bet ween the Electronic Control Unit (ECU) and PMV.

Verify no co ntinui t y between the PM V lea ds and vol ta ge. Verif y 4. 9 to 5. 5 ohm s from REL to CM N & H LD to C M N , and 9. 8 to 11 ohms from REL to HLD. Chec k for corroded/damaged wiring or connectors between the ECU and PMV.

Release Solenoid Open Circuit

Hold Solenoid Shorted to Ground

Hold Solenoid Shorted to Voltage

Hold Solenoid Shorted to Open Circuit

CMN Open Circuit Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from

Conguration Error

Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check for c orroded/damaged w iring or connector s between the ECU and PMV.

Verify no co ntinuit y b et ween th e PMV l eads an d groun d. Verif y 4.9 to 5. 5 ohms from REL to CM N & H LD to C M N , and 9. 8 to 11 ohms from REL to HLD. Chec k for corroded/damaged wiring or connectors between the ECU and PMV.

Verify no co ntinui t y between the PM V lea ds and vol ta ge. Verif y 4. 9 to 5. 5 ohm s from REL to CMN & HLD CMN, and 9.8 to 11 ohms from REL to HLD. Check for corroded/damaged wiring or connectors between the ECU and PMV.

Verify 4.9 to 5.5 ohms from REL to CMN & HLD to CMN, and 9.8 to 11 ohms from REL to HLD. Check for c orroded/damaged w iring or connector s between the ECU and PMV.

REL to HLD. Check for corroded/damaged wiring or connectors between the ECU and PMV. This is potentially a miswired or internal mechanical problem.

A mis‑match exists between the ECU conguration and the modulator installation and wiring. Verify the PMV wiring and installation. Verify the ECU conguration.

Special Note regarding Trailer PMV: Pneumatic issues can result in this DTC being set. Verify all lines are free from debris or other obstructions, kinks, etc.

Pressure Modulator Valve (PMV) Repair Tests:

1. T ake all measurements at the Electronic Control Unit (ECU) harness connector pins in order to check wire harness and PMV. Probe the connector carefully so that the terminals are not damaged.

2. The pressure modulator resistance should read:

Location Measurement

Release to Common 4.9 to 5.5 Ohms Hold to Common 4.9 to 5.5 Ohms Release to Hold 9.8 to 11.0 Ohms Release, Hold, Common to

Voltage or Ground

Open Circuit (no continuity)

When troubleshooting modulator Diagnostic Trouble Codes (DTCs),

check inactive DTCs and the event history for over-voltage or excessive noise DTCs. If one of these is found, troubleshoot these

DTCs rst before the PMV.

Cab-mount ECU: Looking into the wire harness connector

Connector Pin PMV Location

1 Left Steer Axle Hold 2 Left Steer Axle Release 3 Left Steer Axle Common 4 Right Steer Axle Hold 6 Right Steer Axle Common

18 Way

15 Way (if

the ECU is

congured for

6 modulators)

12 Way

7 Right Steer Axle Release

9 Right Drive Axle Common 10 Right Drive Axle Hold 13 Right Drive Axle Release 12 Left Drive Axle Common 16 Left Drive Axle Hold 17 Left Drive Axle Release

4 Left Additional Axle Hold

6 Left Additional Axle Common

7 Left Additional Axle Release

9 Right Additional Axle Common 10 Right Additional Axle Hold 13 Right Additional Axle Release

6 Trailer PMV Hold

9 Trailer PMV Release 12 Trailer PMV Common

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Serial Communications

1st. Blink

Code

2nd. Blink Code

Location:

J1939

Diagnostic Trouble Code Description

1 J1939 Serial Link

2 J1939 Electronic

Retarder Time‑out or Invalid Signal

3 J1939 Electronic Engine

Controller 1 Time‑out or Invalid Signal

4 J1939 Electronic Engine

Controller 2 Time‑out or Invalid Signal

5 J1939 AIR Message

Time‑out or Invalid Signal

6 ESP J1939 CAN

Message Time‑out

Repair Information

There is loss of communications between the Bendix other devices connected to t he J1939 link. Check for damaged or reversed J1939 wiring. Check for corroded or damaged connectors. Ver ify the Electronic Control

Unit (ECU) conguration. Check for other devices inhibiting J1939 communications.

Check for damag ed or reversed J1939 wiring. Check fo r corroded or dam aged connecto rs. Verify t he presenc e of a retarde r on the J1939 link. Verify th e ECU

conguration. Verify that the retarder is congured to broadcast ERC1. Check for

other devices inhibiting J1939 communications. Check for damag ed or reversed J1939 wiring. Check fo r corroded or dam aged

connectors. Verify the presence of ECU on the J1939 link. Verify the ECU

conguration. Verify the ECU is congured to broadcast EEC1. Check for other

devices inhibiting J1939 communications. Check for damag ed or reversed J1939 wiring. Check fo r corroded or dam aged

connectors. Verify the presence of Engine ECU on the J1939 link. Verify the ECU

conguration. Verify that there is an EEC2 broadcast from the address congured

in the ABS ECU. Check for other devices inhibiting J1939 communications. Invalid pressure signals received from a vehicle Controller. Verify the prope r

operation of brake demand sensors. Check wiring between brake demand sensors and the vehicle C ontroller. Verify the prope r programming of vehicl e Controller. Check for damag ed or reversed J1939 wiring. Check fo r damaged or corro ded connectors. Check for other device inhibiting J1939 communications.

Invalid ESP message s on the J1939 link. Check fo r damaged o r reversed J1939 wiring. Check for damaged or corroded connectors. Verify the presence of engine and / or retarder on J1939. V erify the proper programming of engine and/or retarder. Check for other devices inhibiting J1939 communications.

ESP® EC‑80™ Controller and

7 J1939 Transmission

Communication for HSA

8 Time‑out or invalid data

on XBR

10 J1939 Electronic

Transmission Controller 1 Time‑out or Invalid Signal

11 AUXIO CAN message

Time‑out

12 J1939 Hill Start Feature

Switch Signal Not Available

14 J1939 CAN Message

related to ESP is incomplete

There is loss of c ommunicatio ns between the EC‑ 80 ECU and the tr ansmission ECU over the J1939 link. Check for damage d or reversed J1939 wiring. Chec k for damaged or corroded connectors. Verify the presence of transmission ECU on J1939 link. Check for other devices inhibiting J1939 communications.

Check for damag ed or reversed J1939 wiring. Check fo r damaged or corro ded connecto r s. Ch ec k fo r oth er devi c e s inhi bit ing J1939 com muni c at io ns. Verify the

ECU conguration. Verify XBR message being broadcast from address 42.

There is loss of c ommunications bet ween the Bendix EC‑ 80 Controller an d the transmission ECU over the J1939 link. Check for damaged or reversed J1939 wiring. Check for co rrode d or damage d connec tors. Verif y the pre sence of eng ine ECU

on the J1939 link. Verify the ECU conguration. Check for other devices inhibiting

J1939 communications. Check for damag ed or reversed J1939 wiring. Check fo r damaged or corro ded

connecto r s. Ch ec k fo r oth er devi c e s inhi bit ing J1939 com muni c at io ns. Verify the

EC U co n  g u r a t i o n. Verify AUX IO br o a d c a s t fr o m address congured in EC‑ 8 0 ECU.

Check for damag ed or reversed J1939 wiring. Check fo r damaged or corro ded

connectors. Ve r if y the EC U co n  gu r a t i o n . Verif y EB C1 being broadcast with a val i d

SPN 577 parameter. Check for other devices inhibiting J1939 communications. Check for damag ed or reversed J1939 wiring. Check fo r damaged or corro ded

connecto r s. Ch ec k fo r oth er devi c e s inhi bit ing J1939 com muni c at io ns. Verify the

ECU conguration. Verify ESP messages.

2nd. Blink Code

15 J1939 Electronic Engine

16 J1939 Electronic

20 J1939 EAC1 Time‑out

21 CAN Message

22 CAN Message

23 J1939 CCVS Time‑out

24 J1939 TCO

26 J1939 Address Conict

Diagnostic Trouble Code Description

Controller 3 Time‑out or Invalid Signal

Transmission Controller 2 Time‑out

or Invalid Signal

CGW_C1 Time‑out or invalid signal

ASC1_CLCS Time‑out or invalid signal

or Invalid Signal

(Tachograph) Time‑out

ABS Address

Repair Information

There is loss of communications between the Bendix the engine Elec t ro ni c C o ntr o l Uni t (ECU) over the J1939 link. Chec k fo r da ma ge d or reversed J1939 wiring. Che ck for cor r o d e d o r d a m ag e d connectors. Verify the

presence of engine ECU on the J1939 link. Verify the ECU conguration. Check

for other devices inhibiting J1939 communications. There is loss of c ommunications bet ween the Bendix EC‑ 80 Controller an d the

transmission ECU over the J1939 link. Check for damaged or reversed J1939 wiring. Check for co rrode d or damage d connec tors. Verif y the pre sence of eng ine ECU

on the J1939 link. Verify the ECU conguration. Check for other devices inhibiting

J1939 communications.. Verify 60 ohm s of re sist an c e between X1 pin 7 and X1 pin 8. Check for damaged

or reversed J1939 wiring. Check for damaged or corroded connectors. Verify that the message i s being transmit ted. Verify data for Elec tronic Ax le Controller 1 i s

correct. Verify the ECU conguration.

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or reversed J1939 wiring. Check for damaged or corroded connectors. Verify that the message is being transmitted. Verify that the data for differential lock(s) is correct.

Verify the ECU conguration.

Verify 60 ohm s of re sist an c e between X1 pin 7 and X1 pin 8. Check for damaged or reversed J1939 wiring. Check for damaged or corroded connectors. Verify that the message is being transmitted. Verify that the data for Air Suspension Control 1

is correct. Verify the ECU conguration.

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or reversed J 1939 wiring. Check f or damaged or corroded connectors. V erify message

is being transmitted. Verify the ECU conguration.

Verify 60 ohms of resistance between X1 pin 7 and X1 pin 8. Check for damaged or reversed J 1939 wiring. Check f or damaged or corroded connectors. V erify message

is being transmitted. Verify the ECU conguration.

Verify only one A BS ECU is con nected on J1939 bus, broad casting O Bh (equals 13 decimal).

ESP® EC‑80™ Controller and

27 J1939 Address Conict

TPMS Address

28 J1939 Proprietary XBR

Message Out of Range

29 J1939 CAN Messages

Are Not Being Transmitted/Received

Verify only one TPMS ECU is connected on J1939 bus, broadcasting 33h.

Verify 60 ohm s of re sist an c e between X1 pin 7 and X1 pin 8. Check for damaged or reversed J1939 wiring. Che ck for damaged o r corrod ed connectors. Check fo r messages being transmitted/received.

J1939 Troubleshooting Tests:

1. Take all measurements at ECU harness connector.

2. Check for damaged or reversed J1939 wiring.

3. Check for corroded or damaged wiring connector problems such as (opens or shorts to voltage or ground).

4. Check for other J1939 devices which may be loading down (inhibiting) J1939 communication.

Cab-mount ECU: Looking into wire harness connector

Connector Pin J1939

18 Way

7 J1939 Low 8 J1939 High

Troubleshooting Diagnostic Trouble Codes (DTCs): Miscellaneous

1st. Blink

Code 12

2nd.

Blink

Code

1 Stop Lamp Switch

2 Stop Lamp Switch

3 ATC or ESP Disabled

4 Retarder Relay Open

5 Retarder Relay Circuit

6 ABS Indicator Lamp

7 PMV Common

8 PMV Common

9 ATC Disabled to

11 Wheel Speed

Diagnostic Trouble Code Description

Not Detected

Defective

or Dynamometer Test Mode Active

Circuit or Shorted to Ground

Shorted to Voltage

Circuit DTC

Shorted to Ground

Shorted to Voltage

Prevent Brake Fade

Sensors Reversed on an Axle

Location:

Miscellaneous

Repair Information

The Electronic Control Unit (ECU) has not detected the presence of the stop lamp switch since igniti on power was applie d (note that stop lamp switch input may be ap plied to the Bendix and release service b rake. Check f or brake switc h input into ECU (see system wir ing schematic). With servi ce brake released, ch eck for presenc e of the stop lamp bulb. With service brake applied, verify system voltage is now present at the stop lamp switch input to the ECU. Check for damaged wiring between ECU, stop lamp switch and bulb. Check for c orroded or d amaged conn ectors. Che ck for damaged o r reversed J1939 wiring. Check for corroded or damaged connectors on J1939 link. Verify the presence

of engine ECU on the J1939 link. Verify the ECU conguration.

Apply and rel ease ser vi ce bra ke. Check for br ake switch input into ECU (see system wiring schematic). With service brake released, check for presence of the stop lamp bulb.

With service brake applied, verify system voltage is now present at the stop lamp switch input to the ECU. Check for damaged wiring between ECU, stop lamp switch and bulb. Check for c orroded or d amaged conn ectors. Che ck for damaged o r reversed J1939 wiring. Check for corroded or damaged connectors on J1939 link. Verify the presence

of engine ECU on the J1939 link. Verify the ECU conguration.

AT C or ESP is disabled. ECU has been placed in the Dynamometer Test Mode by either the diagnosti c Blink Code Sw itch or a hand ‑held or PC ‑base d diagnostic too l. Clear DTCs to exit Dynamometer Test Mode.

Verify vehicle contains a retarder relay. Verify the ECU conguration. Check wiring

between ECU and retarder relay. Verify no continuity between retarder disable output of Bendix ESP EC‑80 Controller and ground. Verify condition and wiring of the retarder relay.

Check wiri ng betwe en ECU and retard er relay. Verify no conti nuity bet ween ret arder disable output of Bendix ESP EC‑80 Controller and voltage. Verify condition and wiring of the retarder relay.

Check operation of diagnostic Blink Code Switch. Check wiring of diagnostic Blink Code Switch (verif y A B S wir e is not g rou nde d whe re us ed) and A BS I ndic at or L amp. Verif y ABS Indicator Lamp ground input. On some vehicles with multi‑plex dashes, the ground wire may not be present - see ECU 19 DTC.

Verify no continuity between the Release, Hold and CMN of all Pressure Modulator Valves (PMVs), Traction Control Valve (TCV), HSA, Diff Lock Solenoid and ground. Check for corroded/damaged wiring or connectors between the ECU and CMN of all PMVs, TCV, and Diff Lock Solenoid. See the extended troubleshooting for this code in Appendix A.

Verify no co ntinuity betwee n the Re leas e, Hol d and C MN of a ll PM Vs, TCV, HSA, Diff Lock Solenoid and voltage. Check for corroded/damaged wiring or connectors between the ECU and CMN of all PMVs, TCV, and Diff Lock Solenoid.

The Bendix prevent excessive heating of the foundation brakes.

Sensors are rever sed (lef t to ri ght) on one of the a xles. Verif y th e prope r installat ion, connection, and wiring of the sensors.

ESP® EC‑ 80™ Controlle r using either hard‑w ire input or J1939). Apply

ATC (Automatic Traction Control) system is temporarily disabled to

14 Sensor CAN Supply

Voltage Error

17 ABS disabled due to

off‑road mode

19 Maximum number

of PMV cycles exceeded

Incorrect supply voltage for the Steering Angle Sensor (SAS) and the Yaw Rate sensor . Verify the proper voltage at the sensor connectors. Verify the wiring between the ECU and the sensors. Verify the proper output voltage from ECU. Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.

The ABS indicator lamp will be ashing, indicating the ECU is in the off‑road ABS mode.

Remove and re‑apply ignition power.

Replace all PMV valves and clear the DTC.

2nd.

Blink

Code

Diagnostic Trouble Code Description

Repair Information

20 Maximum Number

of TCV Cycles Exceeded

22 ESP Sensor Voltage

Out of Range

24 HS Feature Lamp

Open or Shorted to Ground

25 HS Feature Solenoid

Open or Shorted to Ground

26 HS Feature Solenoid

Shorted to Voltage

27 Brake Lamp Input

Mismatch With Brake Lamp Output

28 Air system/

Mechanical Component

Replace all Traction Control Valve (TCV) valves and clear the Diagnostic Trouble Code (DTC).

Incorrect supply voltage is detected for the Bendix

SAS‑60™ and the Yaw Rate sensor. Verify the pro per voltage at se nsor conne ctors. Verif y wiring bet ween the Ele ctronic Control Unit (ECU) and th e sensors. Verify the prope r output voltage from ECU.

Note: When check ing fo r voltag e at YAW/L AS & SAS, the vol tage wi ll on ly be pr esent momentarily at key ON.

Verify no co ntinuity bet ween the Hi ll Star t / Hill Star t As sist lamp and grou nd. Verify continuity between the lamp and the ECU. Check the wiring between the lamp and the ECU. Check the lamp and the condition of its wiring.

The Hill Start / Hill Start Assist solenoid is shorted to ground or has a broken wire. Verify no continuity between the solenoid and ground. Check for corroded/damaged wiring or connectors between the ECU and the solenoid.

Verify no continuity between the Hill Start / Hill Start Assist Solenoid and voltage. Check for corroded/damaged wiring or connectors between the ECU and Solenoid.

There is a brake lamp input mismatch with the brake lamp output.

Verify brakes are operating correctly. Verify that there is not over‑braking at one or more wheel end(s). Check the pneumatic plumbing and the exhaust port of the PCVs, TCVs,

and relay valves and conrm that the air is being exhausted from all brake chambers. Verify tire sizes on the vehicle match the ABS ECU conguration. Verify wheel speed

sensors and tone ring are properly adjusted and in good condition.

29 Air system/

Mechanical Component

30 ESP Disabled due to

Off Road Mode

31 HS Feature Lamp

Shorted to Voltage

32 I/O 2 or 3 Shorted

High (EC‑80‑ATC) OR I/O 2 or 3 shorted High or Stop Lamp Output error (ESP EC‑80)

33 HS Feature Solenoid

Open Circuit

34 eTrac Valve Solenoid

Shorted to Voltage

35 eTrac Valve Solenoid

Shorted to Ground

Verify that the t ires a re in go od c on diti on. Verif y th at no pne umati c hose s are t w isted or kinked. Verify that t he b rakes are o pe rat ing c o r rec tl y. Verify that th e whe el sp ee d sensor and tone ring are properly adjusted. Verify tire size.

Electronic S tabilit y has been dis abled due to t he vehicle be ing in the AB S or ATC off road mode. Cycle ABS Off Road or ATC Mud snow switch.

Verify that there is no resistance measured between the battery and HSA lamp output of the ECU. Check the wir ing betwee n the ECU and the Hill St art / Hi ll Star t Assist lamp. Check the lamp and condition of its wiring.

Check for a short‑circuit condition between voltage and the I/O 2 and I/O 3 circuits.

Verify resistance across the Hill Sta rt / Hill Start Assist solenoi d. C heck the ECU and HSA solenoid for corroded or damaged wiring and/or connectors.

Verify the resistance between voltage and the Bendix

eTrac™ solenoid is open. Check

for corroded or damaged wiring or connectors between the ECU and the e T rac solenoid.

Verify the resistance between ground and the Bendix eT rac solenoid is open. Check for corroded or damaged wiring or connectors between the ECU and the eTrac solenoid.

36 Reserved 38 Invalid ABS Warning

Lamp Conguration

Reserved Check X1‑12 if pin/wire inst all ed. X2‑12 should have no terminal or conne c ti on. ABS

Warning Lamp is controlled via J1939.

Troubleshooting Diagnostic Trouble Codes (DTCs): ECU

1st. Blink

Code

Location:

ECU

Diagnostic

2nd

Blink

Code

1 ECU DTC (5FC) 2 ECU DTC (5CD)

4 ECU DTC (2678C) 5 ECU DTC (1C) 6 ECU DTC (6CD)

7 8 ECU DTC (56)

9 ECU DTC (CAC3) 10 ECU DTC (5F3) 11 ECU DTC (F1A)

12 ECU DTC (F14) 13

14 ECU DTC (C6) 15 ECU DTC (CF) 16 ECU DTC (C0) 17 ECU DTC (C8C)

18 ECU DTC (CC)

Trouble Code Description

(With HEX designation)

ECU DTC (10)

Conguration

mismatch

Conguration

mismatch

Repair Information

Check for damaged or corroded connectors. Check for damaged wiring. Clear D iagnostic Trouble Code s (DTCs). If DTCs return, contact the Bendix Tech T eam at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further troubleshooting assistance.

Verify components installed match the Electronic Control Unit (ECU)

conguration.

Check for damaged or corroded connectors. Check for damaged wiring. Clear DTCs. If DTCs return, c o ntac t th e Ben dix Tech Team at 1‑80 0 ‑ AIR‑ B R A KE (1‑80 0 ‑247‑2725, option 2, then 1) for further troubleshooting assistance.

Verify components installed match ECU conguration.

Parameter le was not downloaded. To verify that the vehicle specic

parameters have been lo aded, c ontac t Bendix fo r more inf ormat ion at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725).

19 ECU DTC (63) 20 ECU DTC (6E)

21 ECU DTC (6C) 22 ECU DTC (63C)

28 ECU DTC (7CD)

29 ECU DTC (5D)

ECU Internal VIN Mismatch

Valve Conguration

Mismatch

The ECU internally‑stored VIN does not match the VIN of the vehicle. Ensure that the ECU is insta lled on the c orr ect vehicl e. Verify the ECU programming. Verify engine programming.

Check for damaged or corroded connectors. Check for damaged wiring including power and ground wiring. Clear DTCs. If DTCs return, contact the Bendix Tech T eam at 1‑800‑AIR‑BRAKE (1‑800‑247‑2725, option 2, then 1) for further troubleshooting assistance.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Traction Control Valves (TCV)

1st. Blink

Code

18 Drive Axle Traction Control Valve 19 Steer Axle Traction Control Valve

NOTE: When troubleshooting Traction Control Valve DTCs, it may be useful to look for a potential connection between them and ECU DTCs (in particular, DTCs 1 3‑8 and 13‑18 shown on page 36).

Location

2nd. Blink Code

Diagnostic Trouble Code Description

TCV Solenoid Shorted to Ground

TCV Solenoid Shorted to Voltage

TCV Solenoid Open Circuit

TCV Conguration Error The ECU is not congured for ESP or ATC, but has detected the presence

Repair Information

Verify 7 to 19 ohms betwe en Tracti on Control Valve (TCV) and TCV common. Verif y no continu ity bet ween TCV leads and ground. Ch eck for corroded/damaged wiring or connectors between the ECU and TCV.

Verify 7 to 19 ohms between TCV and TCV common. Verify no continuity between TCV leads and voltage. Check for corroded/damaged wiring or connectors between ECU and TCV.

Verify 7 to 19 ohms between TCV and TCV common. Check for corroded/ damaged wiring or connectors between ECU and TCV.

of a TCV. Verify TCV wiring. I nspe ct fo r the p rese nc e of a TCV. Verif y

the ECU conguration.

ATR valve inspections should include: looking for kinked air hoses; inside the harness socket on the valve for removed or corroded connector pins; and a test to verify that the ATC valve solenoids are functioning correctly.

Traction Control Valve (TCV) Repair Tests:

1. Take all measurements at ECU harness connector pins in order to check wire harness and traction control valve. Probe the connector carefully so that the terminals are not damaged.

2. Tractor Control Valve resistance measurements should read:

Location Measurement

TCV to TCV Common 7 to 19 Ohms

Cab-mount ECU: Looking into wire

harness connector

Connector Pin Traction Control Test

18 Way

Release, Hold, Common to Voltage or Ground

Drive Axle Traction

Control Valve Common Drive Axle Traction

Control Valve

Open Circuit (no continuity)

Connector Pin Traction Control Test

Steer Axle Traction

15 Way

Control Valve Common Steer Axle Traction

Control Valve

Troubleshooting Diagnostic Trouble Codes (DTCs):

Steering Angle Sensor (SAS) [Bendix® SAS-60™ Sensor]

1st. Blink

Code

Blink Code

Location:

Steering Angle Sensor

2nd.

Diagnostic Trouble Code Description

SAS Not Calibrated Steering Angle Sensor (SAS) has not been calibrated.

SAS Calibration

in Progress

SAS Static Signal SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring

SAS Signal Out

of Range

SAS Signal Reversed SAS s ignal is reversed. Verify t he proper install ation of the SAS. Verify p roper

SAS Invalid Signal SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring

Repair Information

Perform SAS calibration procedure.

SAS calibration procedure is underway.

between the Electronic Control Unit (ECU) and the SAS. Check SAS output.

SAS signal incorrect. Verify the proper installation of the SAS. Verify proper wiring between the ECU an d the SAS. Check SAS output. Per form SAS calibrati on procedure.

wiring between the ECU and the SAS. Check SAS output.

between the ECU an d the SAS. Check SAS outp ut. Verify that cor rect SAS is being used.

SAS Gradient Error SAS signal is invalid. Verify the proper installation of the SAS. Verify proper wiring

between the ECU an d the SAS. Check SAS outp ut. Verify that cor rect SAS is being used.

SAS CAN Time‑out Loss of CAN communications between the ECU and the SAS. Verify proper wiring

between the ECU and the SAS. Check SAS output.

SAS Long Term

Calibration Error

SAS Plausibility Check E CU has detected incorrect SAS signal as compared to the Yaw Rate sensor signal.

SAS detected but

not congured

SAS calibration error. Verify the proper installation of the SAS. Verify proper wiring between the ECU and the SAS. Check SAS output. Verify that correct SAS is being used. Verify proper ECU programming. Perform SAS calibration procedure.

Verify the proper installation of the SAS. Verify proper wiring between the ECU and the SAS. Check SAS output. Verify that correct SAS is being used. Verify proper ECU programming. Perform SAS calibration procedure.

Verify the ECU is congured for ESP.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Steering Angle Sensor (SAS) [Bendix

(continued)

Steering Angle Sensor (SAS) Connector

Looking into wire harness connector

(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON).

Steering Angle Sensor Tests

1. Measure resistance between input voltage and ground at the sensor wiring harness connector.

Verify continuity between the Electronic Control Unit

(ECU) and SAS‑60 and Yaw Rate Sensor (typically Y AS‑70 or YAS‑60).

Connector Pin Function

2 Voltage Input 1 Ground Input

11 Power

10 Common

ECU

12 Way

SAS

4. T o perform a calibration procedure of the Steering Angle Sensor, Bendix® ACom® Diagnostic Software V6.7.2.5 or higher is required. Using the program, select the “Configuration” option, followed by the “Calibrate” option. The following screen should be displayed.

SAS-60™ Sensor]

2. Verify wiring between the Steering Angle Sensor and the ECU.

SAS Wire

Harness

Terminal

4 7 Verify Continuity 3 8 Verify Continuity

ECU Wire

Harness Terminal

Measurement

3. Verify wiring between the Steering Angle Sensor and power/ground.

SAS Wire Harness

Terminal

4 to Voltage &

Ground

3 to Voltage &

Ground

Measurement

Verify open circuit (no

continuity)

Verify open circuit (no

continuity)

5. Follow the prompts to perform a calibration of the Steering Angle Sensor.

6. To test the Steering Angle Sensor, ACom V6.7.2.5, or higher, is required. Using Bendix ACom V6.7.2.5 or higher, select the “Component Test” option, followed by the “ESP Test” option. The following screen should be displayed.

7. Follow the prompts to perform a test of the Steering Angle Sensor.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Yaw Rate Sensor (YRS)

1st. Blink

Code

Blink

Code

Yaw Rate Sensor

2nd.

Diagnostic Trouble Code Description

YRS Signal Out of

Range

YRS Sensor

Reversed Signal YRS Invalid Signal

YRS Gradient Error

YRS CAN Time‑out Loss of CAN communic ations bet ween th e ECU and the YRS. Verif y pro per wiri ng

YRS Static BITE

Error

YRS Dynamic BITE

Error

YRS Fast Calibration

Error

YRS Static

Calibration Error

Location:

Repair Information

The YRS signal i s inc or r ec t. Verify the prop er in sta llat ion o f the Y RS. Verify proper wiring between the Electronic Control Unit (ECU) and the YRS. Check the YRS output. Perform the YRS calibration procedure.

The YRS signal is reversed. Verify the proper installation of the YRS. Verify the wiring between the ECU and the YRS. Check the YRS output.

The YRS signal i s invalid. Verify the prope r installation of th e YRS. Verify prop er wiring bet ween the ECU and the Y RS. Check the YRS ou tput. Verify that c orrect YRS is being used.

between the ECU and the YRS. Check the YRS output. The YRS signal f ail s st at i c s el f ‑ te st . Verify the prop er i nstallation of th e Y RS. Verify

proper wir ing between the ECU and th e YRS. Check the YRS o utput. Verify that correc t YRS is being used. Verify pro per ECU programming. Per form the YRS calibration procedure.

The YRS signal f ai ls s e l f‑test conducted while vehicl e i s in m ot ion. Verify the p r op e r installation of the YRS. Verify proper wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS is being used. Verify proper ECU programming. Perform the YRS calibration procedure.

There is a YRS calibration error. Verify the proper installation of the YRS. Verify proper wiring between the ECU and the YRS. Check the YRS output. Verify that correct YRS is being used. Verify proper ECU programming. Perform the YRS calibration procedure..

YRS Normal Calibration Error

YRS Plausibility Check (Ref Yaw Rate)

YRS Plausibility Error (Inside Model Based Limits)

YRS Plausibility Error (Outside Model Based Limits)

YRS ‑ SAS Signal Cross‑check Incomplete

YRS ‑ Vibration Detected

YRS Detected But

Not Congured

The ECU has detected an inc or rec t YRS si gnal. Verif y the pr oper i nstall ation of t he YRS. Verify pro per wir ing bet ween the ECU and th e YRS. Chec k the YRS out put. Verify that correct YRS is being used. Verify proper ECU programming. Perform the YRS calibration procedure.

The ECU (if congured) must conrm that YRS and SAS signals match. The vehicle

must be exposed to an S‑shaped driving maneuver for this DTC to automatically clear. If the DTC does not clear even after the S‑shaped driving maneuver, check and correct the orientation of the YRS and then repeat the maneuver.

Inspect the Y RS mounting a nd verif y it is sec urely mounte d. Note that the Y RS may not be reloc ated from the OEM‑ installed position o n vehicle without writ ten Bendix Engineering approval.

Verify that the ECU is congured for ESP.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Yaw Rate Sensor (YRS) (continued)

Yaw Connector

Looking into wire harness connector

(Note: When checking for voltage at YAW/LAS & SAS, the voltage will only be present momentarily at key ON.).

Yaw Rate Sensor Tests

1. Verify continuity between the Electronic Control Unit (ECU) and the Yaw Rate Sensor (typically YAS‑70 or YAS‑60).

Connector Pin Function

2 Voltage Input 1 Ground Input

11 Power

10 Common

ECU

12 Way

YRS

4. To perform a calibration procedure of the Yaw Rate Sensor, ACom® Diagnostic Software V6.7.2.5 (or higher) is required. Using the program, select the “Configuration” option, followed by the “Calibrate” option. The following screen should be displayed.

2. Verify wiring between the Yaw Rate Sensor and the ECU.

YRS Wire

Harness

Terminal

4 7 Verify Continuity 3 8 Verify Continuity

ECU Wire

Harness Terminal

Measurement

3. Verify wiring between the Y aw Rate Sensor and power/ ground.

YRS Wire Harness

Terminal

4 to Voltage &

Ground

3 to Voltage &

Ground

Measurement

Verify open circuit (no

continuity)

Verify open circuit (no

continuity)

5. Follow the prompts to perform a calibration of the Yaw Rate Sensor.

6. T o test the Y aw Rate Sensor , ACom V6.7.2.5, or higher , is required. Using Bendix ACom V6.7.2.5 or higher, select the “Component Test” option, followed by the “ESP Test” option. The following screen should be displayed.

7. Follow the prompts to perform a test of the Yaw Rate Sensor.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Lateral Acceleration Sensor (LAS)

1st. Blink

Code

Blink Code

Location:

Lateral Acceleration

Sensor

2nd.

Diagnostic Trouble Code Description

LAS Signal Out of

Range

2 LAS Calibration in

Progress

3 LAS Static

Calibration Error

4 LAS Long Term

Calibration Error

Repair Information

LAS signal inc orr ect. Verif y the pro per installati on of the Y RS/L AS. Verif y proper wiring between the Electronic Co ntr o l U nit (ECU) and the YRS/LAS. Check YRS/LAS output. Perform LAS calibration procedure.

LAS calibration procedure is underway.

LAS calibr ation e r ror. Verify the proper installati on of th e YRS/LAS. Verify proper wiring between the ECU and the YRS/LAS. Check YRS/LAS output. Verify that correct YRS/LAS is being used. Verify proper ECU programming. Perform LAS calibration procedure.

5 LAS Plausibility

Error (Inside ECU‑

specic Limits)

6 LAS Plausibility

Error (Outside ECU

–specic Limits)

7 Erratic ESP Sensor

Signal

(Note: When checking for voltage at YRS/LAS & SAS, the voltage will only be present momentarily at key ON.).

1. Follow the steps shown in the Yaw Rate Sensor troubleshooting section for calibration and troubleshooting of the Lateral Acc eleration Sensors (previous page).

ECU has detected an incorrect LAS signal. Verify the proper installation of the YRS/LAS. Verify proper wiring between the ECU and the YRS/LAS. Check YRS/LAS output. Verify that correct YRS/LAS is being used. Verify proper ECU programming. Perform LAS calibration procedure.

ECU has detected an erratic signal. Verify the proper installation of the YRS/ LAS. Verify proper wiring between the ECU and the YRS/LAS. Check YRS/ LAS output. Verify that correct YRS/LAS is being used. Verify proper ECU programming. Perform LAS calibration procedure.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Brake Demand/Load Sensors

1st. Blink

Code

2nd.

Blink

Code

1 PS1 Open or 2 PS2 Open or

3 PS3 Open or 4 PS1/2 5 PS Supply

6 PS Not 7 PS Error Verify operation of pressure sensor.

8 PS Supply 9 PS Not

Location:

Brake Demand/

Load Sensor

Diagnostic Trouble Code Description

Shorted Shorted

Shorted Plausibility Error Voltage Error

Calibrated

Voltage Error

Congured

Repair Information

Check wiring between Brake Demand Sensor (primar y brake circuit) and Electronic Control Unit (ECU). Verify operation of pressure sensor. Check wiring between Brake Demand Sensor (secondary brake circuit) and ECU. Verify operation of pressure sensor. Check wiring between Load Sensor and ECU. Verify operation of pressure sensor.

ECU has detected an invalid pressure sensor signal from one of the Brake Demand Sensors. Incorrect supp ly voltage to the sensors. Verif y the proper voltage at sensor connectors. Verify wiring between the ECU and the sensors. Verify the proper

output voltage from the ECU (Specically, ensure that X4‑4 PS_SPL is not

shorted to ground). Perform static sensor calibration procedure. (NOTE: When replacing an ECU,

this DTC may occur.)

Incorre ct supply voltage to senso rs. Verify the prope r voltage at sensor con nectors. Verify wiring between ECU and the sensors. Verify the proper output voltage from ECU.

Check for presence of pressure sensors. Make sure ESP is enabled.

Looking into wire

harness connector

Brake Demand/Load Sensor Tests

1. Verify continuity between the ECU and the pressure sensor power and ground.

Power and Ground Input Test Measurement

B = Power Input X4 ‑ 4 Power A = Ground Input X4 ‑ 1 Common

2. Verify wiring between the Load Sensor and the ECU.

Load Sensor

Wire Harness

Terminal

ECU Wire Harness

Terminal

X4 ‑ 2 Brake Demand Sensor (primary brake circuit)

X4 ‑ 5 Brake Deman d Sen sor (secondary brake circuit)

X4 ‑ 3 Load Sensor Verify Continuity

Measurement

Verify Continuity

3. Verify wiring between the Load Sensor and power/ ground.

Load Sensor Harness Terminal

C to Voltage & Ground Verify open circuit (no continuity)

Measurement

4. T o perform a calibration procedure of the Brake Demand Sensor(s), ensure that the air system is fully charged. Apply ignition power, and wait 30 seconds. Perform a full application of the service brake and hold for 5 seconds. Release the service brake.

5. To test the Brake Demand Sensor and/or the Load Sensor, Bendix® ACom® Diagnostic Software V6.7.2.5 or higher is required. Using the program, select the “Component Test” option, followed by the “ESP Test” option. The following screen should be displayed.

6. Follow the prompts to test the Brake Demand Sensor(s) and/or the Load Sensor.

Troubleshooting Diagnostic Trouble Codes (DTCs):

Valves Miscellaneous

1st. Blink

Code

Blink Code

Location:

Valves

2nd.

Diagnostic Trouble Code Description

Differential Lock

Solenoid Open

2 Differential Lock

Solenoid Shorted to Ground

3 Differential Lock

Solenoid Shorted to Voltage

4 I/O 3 Open Circuit Verify resistance for I/O3 c ircuit. Check for cor roded / damaged wiring o r

5 I/O 3 shorted to

Ground

Verify resistance between Diff solenoid and Diff common. Check for corroded /damaged wriing or connec tors between the Elec tronic Control Unit (ECU) and the Diff solenoid.

Verify no continuity b etween the D iff Loc k Solenoid an d ground. Check for corroded /damaged wiring or connectors between the ECU and Diff Lock Solenoid.

Verify no continuity b etween th e Dif f Lock S olenoid and volt age. Check for corroded /damaged wiring or connectors between the ECU and Diff Lock Solenoid.

connector between ECU and I/O. Check for a short circuit condition between ground and the I/O 3 circuit

Verify resistance between Input /Output and ground is open

Repair Information

6 I/O 3 Shorted to

Battery

7 Output Conguration

Error ‑ Diff

8 Output Conguration

Error ‑ I/O 3

Check for a shor t circuit condition between voltage and the I/O 3 circuit Verify resistance between Input /Output and voltage is open

Mismatch between ECU conguration and Diff valve

Mismatch between ECU conguration and I/O3

Troubleshooting Diagnostic Trouble Codes (DTCs):

Bendix® ESP® system-related

1st. Blink

Code

2nd.

Blink

Code

Location:

J1939 Bendix

Diagnostic Trouble Code

system-related

Description

1 J1939 CAN Time‑out of ESP

Message

2 Time‑out or Invalid CAN data

–CCVS 2 ESP Message

3 Time‑out or Invalid CAN data

–Electronic Engine Controller 1 ESP Message

4 Time‑out or Invalid CAN data

–EEC2 ESP Message

5 Time‑out or Invalid CAN data

– Driveline Line Retarder ESP Message

6 Time‑out or Invalid CAN data –

Engine Retarder ESP Message

7 Time‑out or Invalid CAN

data – Exhaust Retarder ESP Message

8 Time‑out or Invalid CAN data –

PROP XBR ESP Message

9 Time‑out or Invalid CAN data

– Transmission Retarder ESP Message

10 Time‑out or Invalid CAN data

–Electronic Transmission Controller 1 ESP Message

11 Time‑out or Invalid AUXI/O –

ESP Message

ESP®

Repair Information

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded conn ectors . Verify mes sage is be ing transmi tted on J1939 link.

Verify the Electronic Control Unit (ECU) conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded conn ectors . Verify mes sage is be ing transmi tted on J1939 link.

Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded connector s. Verify the pres ence of engine ECU on J1939 link. Verify mess age is b ein g tra nsmitted on J1939 link. Verify dat a for d ri ver 's demand torque, act ual engine to rque, engin e speed is c or rect. Verif y th e

ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded connector s. Verify the pres ence of engine ECU on J1939 link. Verify mess age is being transmitte d on J1939 link. Verify ac celeration pedal positi on and acceleration p edal status is correc t. Verif y the ECU

conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded connectors. Verif y the presence of a retar der on J19 39 Link. Verify that the message is being transmitted. Verify that the data is correct

for torque / speed control. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded con nector s. Verif y the pres ence of Rad ar on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 Link. Verify that the message is being transmitted. Verify that the data in torque/speed

control. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded con nector s. Verif y the pres ence of tr ansmiss ion ECU on J1939 link. Verify that t he me ss age i s bein g tra nsmit te d. Verif y th at the dat a fo r

shift in process, torque conguration lock , driveline engaged is correct. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify that the message is being transmitted. Verify

that the data for reference torque is correct. Verify the ECU conguration

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Bendix® ESP® system-related (continued)

1st. Blink

Code

Blink Code

Location:

J1939 Bendix

system-related

2nd.

Diagnostic Trouble Code Description

12 Time‑out or invalid data for

Conguration of Electronic

Engine Controller 1 ESP Message

13 Invalid Data Transfer Time‑out

of EC1 ESP Message

14 Time‑out or invalid data for

Conguration of Driveline Line

Retarder ESP Message

15 Time‑out or invalid CAN data

–Electronic Engine Controller ESP Message

ESP®

Repair Information

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded c on nec tor s. Verif y t he p rese nc e of eng ine on J1939 link. Verif y that the mess age is being transm itted. Verify th at the data for referen ce

torque is correct. Verify the Electronic Control Unit (ECU) conguration

torque is correct. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify that the mess age is being transm itted. Verify th at the data for referen ce

torque is correct. Verify the ECU conguration

Check for damaged or re versed J1 939 wiring. Check for damaged or corroded connecto rs. Verif y the p resenc e of engin e ECU on J1939 link. Verify th e

presence of engine ECU on J1939 link. Verify the ECU conguration

16 Time‑out or invalid CAN data

–Electrionic Transmission Controller 2‑ message required for ESP

17 Time‑out or invalid data

for Conguration of Engine

Retarder ESP Message

18 Time‑out or invalid data for

Conguration of Exhaust

Retarder ESP Message

19 Time‑out or invalid data for

Conguration of Transmission

Retarder ESP Message

20 Invalid Data Transfer Time‑out

of Driveline Line Retarder ESP Message

21 Invalid Data Transfer Time‑out

of Engine Retarder ESP Message

22 Invalid Data Transfer Time‑out

of Exhaust Retarder ESP Message

current gear is correct. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded con nector s. Verif y the pres ence of Rad ar on J1939 link. Verify

the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify the presence of a retarder on J1939 link. Verify message is being transmitted.

Verify the ECU conguration

Troubleshooting Diagnostic Trouble Codes (DTCs):

J1939 Bendix® ESP® system-related (continued)

1st. Blink

Code

2nd. Blink Code

23 Time‑out or invalid CAN data –

24 Time‑out or invalid CAN data –

25 Invalid Data Transfer Time‑out

27 Time‑out of message or invalid

Location:

J1939 ESP-related

Diagnostic Trouble Code Description

CCVS ESP Message

TCO ESP Message

of Driveline Line Retarder ESP Message

ESP‑related CM3 Time‑out at J1939

data received from transmission transfer information on J1939 ‑ message required for ESP

Repair Information

Check for dama ged or reversed J1939 wiring. Check for da maged or corro ded conn ectors . Verify mes sage is be ing transmi tted on J1939 link. Verify data for park brake, brake lamp switch, clutch and tachograph. Verify

the Electronic Control Unit (ECU) conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify the presence of a retarder on J1939 link. Verify

message is being transmitted. Verify the ECU conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

28 Time‑out or invalid CAN data –

Electronic Axle Controller 1ESP Message

Check for dama ged or reversed J1939 wiring. Check for da maged or corroded connectors. Verify message is being transmitted. Verify the ECU

conguration

Troubleshooting: Connectors

Bendix® ESP® EC-80™ Controller Wire Harness Connector Part Numbers and Pin Assignments:

CONNECTOR

CONNECTORX3CONNECTORX4CONNECTOR

Bendix ESP EC-80 Controller

Controllers utilize four (4) AMP connectors for wire harness connections.

X1 Connector Pin Assignments

Vary by Part Number:

K098920R000 K098921R000 K103428R000 K103429R000 K105094R000 K105095R000 K105096R000 K105097R000

Pin Designation Designation Designation Designation Designation

1 Ground PMV SA Left HLD ABS ORS Pressure Sensor CMN 2 Trailer ABS Indicator HSA Disable Switch PMV SA Left REL 3 Ignition PMV SA Left CMN TCV CMN (SA) Load Sensor Signal 4 TCV CMN (DA) TCV (DA) PMV SA Right HLD PMV AA Left HLD

5 TCV (DA) TCV CMN (DA) WSS SA Left (+) TCV (SA)

ATC/ESP Indicator

and ATC ORS 7 J1939 High PMV SA Right REL PMV AA Left REL Sensor CAN Low 8 J1939 Low

9 SLS Input

10 WSS DA Right (+) PMV DA Right HLD PMV AA Right HLD Sensor CAN Common

ABS Indicator

Ground

13 J1939 High 2 PMV DA Right REL PMV AA Right REL 14 J1939 Low 2 15 ABS Indicator Interlock WSS DA Left (+) WSS AA Right (‑) 16 Battery PMV DA Left HLD

17 Retarder ATC/ESP Indicator PMV DA Left REL 18 ABS Dash Indicator

WSS DA Right (‑) WSS SA Right (+) WSS AA Left (+) Sensor CAN Supply

K105303R000

X2 Connector

Assignments

TPMS Ground PMV SA Right CMN PMV AA Left CMN PMV Trailer HLD

WSS SA Left (‑) Stop Lamp Output Sensor CAN High TPMS Communications

Reserved PMV DA Left CMN WSS AA Right (+) PMV Trailer CMN

ATC Disable S witch or Diagnostic Switch

AWD vehicles only (AWD Transfer Case.)

PMV DA Right CMN PMV AA Right CMN PMV Trailer REL

WSS SA Right (‑) WSS AA Left (‑)

WSS DA Left (‑)

X3 Connector

Assignments

Diff. Lock Solenoid

X4 Connector Pin

Assignments

Brake Demand Primary

Circuit Signal

Pressure Sensor Supply Brake Demand Secondary Circuit Signal

Troubleshooting: Wiring

ABS/ATC WIRING

Electronic Control Unit (ECU) Wiring Harness Connectors

The Bendix® ESP® EC‑ 80™ Controller is designed to interface with AMP MCP 2.8 connectors as referenced in Figure 21. Follow all AMP requirements for t he repair of wire harnesses.

All wire harness connectors must be properly seated. The use of secondary locks is strongly advised.

All unused ECU connectors must be covered and receive proper environmental protection.

ABS Wiring Requirements

As a matter of good practice and to ensure maximum system robustness, always use the maximum size wire supported by the wire harness connectors for battery, ignition, ground, Pressure Modulator Valve (PMV), T raction Control Valve (TCV), Interaxle Differential Lock and indicator lamp circuits.

All sensor and serial communications circuits (J1 939) must use twisted pair wir ing (one to two twists pe r inch). See the appropriate Soci ety of Automotive Engineers (SAE) document for additional details.

All wires mus t be carefully route d to avoid cont act with rotating elements. Wiring must be properly secured approximately every 6 to 12 inches using UV stabilized, non-metallic hose clamps or bow-tie cable ties to prevent pinching, binding or fraying.

It is recommended that wir es be routed straight out of a connector for a minimum of three inc hes before the wi re is allowed to bend.

Battery and g round wires should be kept to a minimum length.

If convoluted tubing is used, its I.D. must match the size of the wire bundle as closely as possible.

Wire harn ess len gths mu st be ca refully se lect ed for the vehicle. Excess lengths of wire are not to be wound to form coils, instead re-route, repair or replace wire harness to avoid the possibilit y of electrical interference and wire damage. Do not at tempt to stretch harnesses that are too short, since mechanical strain can result in wire breakage.

Bendix® SAS-60™ Sensors and YAS-60™, or YAS-70X™, Sensor Wiring

If it is necessar y to replace the wir ing that connects t he Bendix SAS‑ 60 or the Yaw Rate sensor to the ECU, it is import ant to use the same wiring as that used by the vehicle OEM.

ABS Component Connector Wire Terminal

In‑Cab Controller Harness

17‑Way AMP

MCP 2.8 (X1)

1718091‑1

927768‑9 1 ‑ 2.5 mm X1‑12 & 18

In‑Cab Controller Harness

18‑Way AMP

MCP 2.8 (X2)

8‑968974‑1

Wire Seal/

Plug

Terminal

Lock

Terminal Crimp Tool

N/A

967634

In‑Cab Controller Harness

15‑Way AMP

MCP 2.8 (X3)

8‑968973‑1

968874

2.5 ‑ 4 mm

Controller Harness

12‑Way AMP

MCP 2.8 (X4)

8‑968972‑1

968873

1.0 ‑ 2.5 mm

ABS Modulator Harness

AMP T wist‑Lock

(Bayonet)

ATC Modulator Harness

1‑967325‑2

929975‑1

AMP T wist‑Lock

(Bayonet)

1‑967325‑3

ABS Modulator Harness

3‑pin Packard

Metri‑Pack 280 Series

12040977

12077411

TE® Connectivity / AMP Terminal Removal Tool. Newark® Part

No. 78H0240. Manufacturer Part Number 1‑1579007‑6

12015323

N/A

12034145

539723‑2

539635‑1

12155975

Bendix® WS-24™ Wheel Speed Sensor Connectors

Packard® GT

150 series

Packard

Metripack 150.2

series

Deutsch

DTM06 series

Packard

Metripack 280

series (female)

Packard

Metripack 280

series (male)

Yaw Rate Sensor Wire Harness Connectors (4 contact): Straight Connector: Schlemmer® 9800 351 (shown)

AMP® Connector 2‑967325‑1 ITT® Cannon® Connector 121583‑001

90 degree Connector: Schlemmer 9800 331 Brake Demand Sensor/Load Sensor

Wire Harness Connectors:

Metri‑Pack® (Packard) 1206 5287

Contact Pins:

Packard 1210 3881

Bendix® SAS-60™ Sensor Connectors:

Robert Bosch® 1 928 404 025, Robert Bosch 1 928 498 001

One Meter Adapter to Connector:

Bendix 5015242 (shown) Packard 12092162, pins 12064971

FIGURE 21 - BENDIX ESP® EC‑80™ CONTROLLER COMPONENT CONNECTORS

Deutsch DT04

series

Standard round

two pin

Yaw Rate Sensor Wire Harness Contact Pin Terminals:

Schlemmer 7814 125 AMP 0‑962981‑1 ITT Cannon 031‑8717‑120

WS-24™ Speed

Sensor

Troubleshooting: Wiring (Continued)

Speed Sensor

Mounting Block

100 Tooth (typical)

Speed Sensor

Exciter Ring

Mounting

Block

Brake Drum

Max. Gap

(Sensor to Exciter)

.015 Inches

WS-24™ Speed

Sensor

100 Tooth

Exciter

Ring

Hub Assembly

Air Disc Brake

Note: Ensure that the sensor wiring is

routed to avoid chang from moving

parts (including rotors and steering components.)

FIGURE 22 - BENDIX® WS‑24™ WHEEL SPEED SENSOR INSTALLATION (S‑CAM AND AIR DISC BRAKE)

90° Speed

Sensors

Sensor

Clamping

Sleeve

Wheel Speed Sensor Wiring

Route sensor wiring coming o ut of the wheel ends away from moving brake components. Sensor w ir in g nee ds to be secured to the axle to prevent ex cess cable length and wiring damage. It is required that cab le ties be installe d to the sensor wire within 3 inches (76.2 mm) of the sensor head to provide strain relief.

Following the axle, the sensor wires must be attached along the length of the service brake hoses using cable ties with ultraviolet protection and secured every 6 to 8 inches

(152 to 203 mm). Sufcient – but not excessive – cable

length must be provided to permit full suspension travel and steering axle movement. Install wires so that they cannot touch rotating elements such as w heels, brake discs or drive shafts. Radiation protec tion may be necessar y in the area of brake discs.

Bendix does not recomm e n d us in g standard tie‑wraps to secure wiring har nes s es dire c t ly to r ubb er air line s. Thi s may cause premature wiring failure from the pressure exerted on the wiring when air pressure is applied through the air line. Non‑metallic hose clamps or bow‑tie tie‑wraps are preferred.

The use of grommets or other suitable protection is required whenever the cable must pass throug h metallic frame members.

All sensor wiring must utilize twisted pair wire, with approximately one to two twists per inch.

It is recommended that wir es be routed straight out of a connector for a minimum of three inc hes before the wi re is allowed to bend.

Straight Speed

Sensors

OP LAMP OUTPUT

PMV_TR_REL

PMV_TR_CMN

PMV_TR_HLD

PS_SIG 1

PS_SIG 3

PS_SPL

PS_CMN

PS_SIG 2

CAN_SEN_SPL

CAN_SEN_CMN

CAN_SEN_HI

CAN_SEN_LO

TCV_SA_CMN

TCV_SA

PMV_AL_REL

PMV_AL_CMN

PMV_AL_HLD

PMV_AR_REL

PMV_AR_CMN

PMV_AR_HLD

WSS_AL-

WSS_AL+

WSS_AR-

WSS_AR+

DIFF

ABS ORS

WSS_SL-

WSS_SL+

WSS_SR-

WSS_SR+

PMV_SL_REL

PMV_SL_CMN

PMV_SL_HLD

PMV_SR_REL

PMV_SR_CMN

PMV_SR_HLD

PMV_DL_REL

PMV_DL_CMN

PMV_DL_HLD

PMV_DR_REL

PMV_DR_CMN

PMV_DR_HLD

WSS_DL-

WSS_DL+

WSS_DR-

WSS_DR+

SLS INPUT

ABS IND. GND

IND. INTERLOCK

ABS IND.

TRAILER ABS IND.

IGNITION

GROUND

RETARDER

BATTERY

J1939_HI

J1939_LO

J1587 A

J1587 B

11 14

476

10 13

15 18

Troubleshooting: Wiring Schematic A

PMV

2 1

88 8 8

1010

DIFF

7 7

6 6 6

30A

TRAILER

PRESSURE

SENSOR 1

(PRIMARY

DELIVERY)

YAW

RATE

AMP

CONNECTOR

PART NUMBER

NUMBER OF

CONTACTS

REF. NO.

SENSOR

STEERING

ANGLE

1718091-1

17 POLE

SENSOR

8-968974-1

8-968973-1

15 POLE

18 POLE

STOP LAMP

RELAY

8-968972-1

X4 12 POLE

NOTES

1. RETARDER CONTROL VIA RELAY OR SAE J1939.

5 PRESSURE MODULATOR VALVE (PMV): BENDIX M-32, M-32QR, M-40X

6 PMV CONNECTOR TWIST-LOCK PACKARD

4 ATC ENGINE CONTROL PER SAE J1939.

2 DIAGNOSTICS PER SAE J1587 OR J1939.

3 DIAGNOSTIC BLINK CODE SWITCH (MOMENTARY SWITCH).

PRESSURE

SENSOR 3

(SUSPENSION)

PRESSURE

SENSOR 2

(SECONDARY

DELIVERY)

STEER

AXLE

TRACTION

CONTROL

VALVE

ADD

PMV

AXLE

LEFT

ADD

PMV

AXLE

RIGHT

WSS

ADD

AXLE

LEFT

WSS

LOCK

SOL

WSS

ADDITIONAL AXLE

ADD

AXLE

RIGHT

ABS

STEER

AXLE

LEFT

STEER

AXLE

RIGHT

STEER

AXLE

LEFT

PMV

WIRE HARNESS CONNECTORS

(ORS)

SWITCH

OFF-ROAD

STEER AXLE

STEER

AXLE

RIGHT

PMV

DRIVE

AXLE

LEFT

5 5 5

PMV

DRIVE

AXLE

RIGHT

PMV

DRIVE AXLE

WSS

DRIVE

AXLE

LEFT

WSS

DRIVE

AXLE

RIGHT

(OPTIONAL)

RETARDER RELAY

ABS DASH

INDICATOR

TRAILER ABS

DASH INDICATOR

STOP LAMP

(SLS)

STOP LAMP SWITCH

+12V IGNITION

Use this page for the following Electronic C ontrol Unit (ECU) part numbers: K098920R000 K098921R000 K103428R000 K103429R000 K105094R000 K105095R000 K105096R000 K105097R000 See next page for the alternate wiring schematic for one other part number.

COMMON (CMN) PIN 2 PIN B

HOLD (HLD) PIN 3 PIN C

RELEASE (REL) PIN 1 PIN A

9 TRACTION CONTROL VALVE (TCV).

7 WHEEL SPEED SENSOR (WSS): BENDIX WS-24

8 WSS WIRING - 18 AWG (TWISTED PAIR REQUIRED).

+12V BATTERY

11 DOTTED LINES: SPECIAL FUNCTION (OPTIONS).

10 SERIAL COMMUNICATIONS - 18 AWG (TWISTED PA IR REQUIRED).

VEHICLE 6 X 4

12 BATTERY AND GROUND - 12 AWG

13 ALL WHEEL DRIVE VEHICLES ONLY. REQUIRES STOP LAMP INPUT (SEE NOTE 18 ).

16. THIS SYSTEM WIRING CONNECTION SCHEMATIC IS FOR AN EC-80 ECU DESIGNED AS A SERVICE REPLACEMENT FOR EC-60 ADVANCED.

ABS INDICATOR.

17 WHEN X1 IS DISCONNECTED FROM ECU, THE INTERLOCK SHORTS THE INDICATOR CIRCUIT TO GROUND, ILLUMINATING THE

18 STOP LAMP SWITCH INPUT REQUIRED FOR ATC AND ALL-WHEEL DRIVE VEHICLES.

15. PRODUCT SPECIFICATION: Y119679

14. ALL WIRE IS CONDUCTOR CROSS-SECTION OF 16 AWG, UNLESS OTHERWISE NOTED.

19 CAN SENSOR WIRING - 18 AWG (FOUR CONDUCTOR TWISTED WIRE REQUIRED).

20 MOMENTARY SWITCH.

MAY BE PROVIDED VIA HARDWARE INPUT OR J1939 COMMUNICATION.

21 ADDITIONAL AXLE WSS AND PMV INSTALLED PER EC-80 CONFIGURATION (6S/4M, 6S/6M).

ADDITIONAL

DRIVE

STEER

TCV_DA_CMN

TCV_DA

ESP/ATC IND.

TRAC

CONTROL

VALVE

(TCV)

ATC

ESP/ATC

DASH

INDICATOR

(ORS)

SWITCH

OFF-ROAD

FIGURE 23 - STANDARD WIRING SCHEMATIC FOR ECUs LISTED ABOVE

Troubleshooting: Wiring Schematic B (Alternate)

PMV_TR_REL

PMV_TR_CMN

PMV_TR_HLD

PS_SIG 1

PS_SIG 3

PS_SPL

PS_CMN

PS_SIG 2

CAN_SEN_SPL

CAN_SEN_CMN

CAN_SEN_HI

CAN_SEN_LO

TCV_SA_CMN

TCV_SA

PMV_AL_REL

PMV_AL_CMN

PMV_AL_HLD

PMV_AR_REL

PMV_AR_CMN

PMV_AR_HLD

WSS_AL-

WSS_AL+

WSS_AR-

WSS_AR+

HSA SOLENOID

I/0

TPMS PWR

WSS_SL-

WSS_SL+

WSS_SR-

WSS_SR+

PMV_SL_REL

PMV_SL_CMN

PMV_SL_HLD

PMV_SR_REL

PMV_SR_CMN

PMV_SR_HLD

PMV_DL_REL

PMV_DL_CMN

PMV_DL_HLD

PMV_DR_REL

PMV_DR_CMN

PMV_DR_HLD

WSS_DL-

WSS_DL+

WSS_DR-

WSS_DR+

TPMS COMM

NOT CONNECTED

IND. INTERLOCK

ATC DIS OR DIAG

HSA DISABLE

IGNITION

GROUND

ATC IND

BATTERY

J1939_HI

J1939_LO

CAN LO 2

CAN HI 2

11 14

476

10 13

15 18

ATC DISABLEORDIAGNOSTIC

88 8 8

SWITCH

30A

1010

PMV

TRAILER

Use the wiring schematic on this page for the following Electronic Control Unit (ECU) part number:

PRESSURE

SENSOR 1

(PRIMARY

PRESSURE

SENSOR 3

DELIVERY)

(SUSPENSION)

YAW

RATE

SENSOR

K105303R000

See the previous page for a second list of ECU part numbers.

PRESSURE

SENSOR 2

(SECONDARY

DELIVERY)

If your ECU part numbe r does not appear on eit her list , pleas e

STEER

AXLE

TRACTION

CONTROL

VALVE

2 1

HSA

SOL

7 7

6 6 6

5 5 5

ATC

MUD

& SNOW

HSA

SWITCH

DISABLE

ATC

LAMP

ADD

PMV

AXLE

LEFT

ADD

PMV

AXLE

RIGHT

WSS

ADD

AXLE

LEFT

WSS

ADDITIONAL AXLE

ADD

AXLE

RIGHT

STEER

AXLE

LEFT

STEER

AXLE

RIGHT

STEER

AXLE

LEFT

PMV

WIRE HARNESS CONNECTORS

AMP

CONNECTOR

PART NUMBER

NUMBER OF

CONTACTS

REF. NO.

8-968974-1

1718091-1

18 POLE

17 POLE

8-968973-1

8-968972-1

15 POLE

X4 12 POLE

STEER AXLE

STEER

AXLE

RIGHT

PMV

COMMON (CMN) PIN 2 PIN B

HOLD (HLD) PIN 3 PIN C

NOTES:

1. RETARDER CONTROL VIA SAE J1939.

2 DIAGNOSTICS VIA SAE J1939.

3 MOMENTARY SWITCH.

DRIVE

AXLE

LEFT

PMV

DRIVE

AXLE

RIGHT

PMV

WSS

DRIVE AXLE

DRIVE

AXLE

LEFT

AXLE

DRIVE

RIGHT

HSA

LAMP

4 ATC ENGINE CONTROL PER SAE J1939.

+12V IGNITION

RELEASE (REL) PIN 1 PIN A

7 WHEEL SPEED SENSOR (WSS): BENDIX WS-24.

5 PRESSURE MODULATOR VALVE (PMV): BENDIX M-32, M-32QR, M-40X.

6 PMV CONNECTOR TWIST-LOCK PACKARD

8 WSS WIRING - 18 AWG (TWISTED PAIR REQUIRED).

call 1‑800‑AIR‑BRAKE, option 2, and speak with the Tech Team.

9 TRACTION CONTROL VALVE (TCV).

11 DOTTED LINES: SPECIAL FUNCTION (OPTIONS).

12 BATTERY AND GROUND - 12 AWG.

10 SERIAL COMMUNICATIONS - 18 AWG (TWISTED PAIR REQUIRED).

+12V BATTERY

16 TPMS WIRING - 3 WIRES.

13. ALL WHEEL DRIVE VEHICLES ONLY. REQUIRES STOP LAMP INPUT (SEE NOTE 18 ).

15. PRODUCT SPECIFICATION: Y119679 AND Y173755.

14. ALL WIRE IS CONDUCTOR CROSS-SECTION OF 16 AWG, UNLESS OTHERWISE NOTED.

VEHICLE 6 X 4

17. WHEN X1 IS DISCONNECTED FROM ECU, BODY CONTROLLER NEEDS TO ILLUMINATE ABS INDICATOR.

19 CAN SENSOR WIRING - 18 AWG (FOUR CONDUCTOR TWISTED WIRE REQUIRED).

18 STOP LAMP SWITCH INPUT REQUIRED FOR ATC AND ALL-WHEEL DRIVE VEHICLES.

IS PROVIDED VIA STOP LAMP SWITCH VIA J1939 COMMUNICATION.

20 ADDITIONAL AXLE WSS AND PMV INSTALLED PER EC-80 CONFIGURATION (6S/4M, 6S/6M).

21. ABS/ESP/TRAILER LAMP VIA J1939. 22. NO ABS OFF ROAD SWITCH. ABS OFF ROAD ACTIVATED WITH ATC MUD AND SNOW.

ADDITIONAL

DRIVE

STEER

TCV_DA_CMN

TCV_DA

TPMS GND

TRAC

CONTROL

VALVE

(TCV)

FIGURE 24 - CAB WIRING SCHEMATIC FOR ECU LISTED ABOVE

GLOSSARY

ABS — Antilock Brake System. ABS Event — Impend ing whee l loc k situati on that c auses t he

ABS Controller to activate the modulator valve(s). ABS Indicator Lamp — An amber lamp whi ch indicates the

operating status of an antilock system. When the indicator lamp is on, ABS is dis abled and t he vehicl e rever ts to nor mal brake operation.

Air Gap — Distance between the Sensor and tone ring. ASR — Auto matic Slip Re gulation. A nother na me for trac tion

control. ATC — Automatic Traction Control. An additional ABS function

in which engine t orque is controlled and br akes are applied differentially to enhance vehicle traction.

ATC/ESP Lamp — A lamp that indicates when stability functions, including trac tion contro l, roll stability pr ogram or yaw control are operating.

Channel — A controlled wheel site. CAN — Controlle r Area N etwor k. J1939 is an SAE ver sion of

the CAN link. Clear Cod es — Syste m to erase h istor ic al Diag nosti c Trouble

Codes (DTCs) from the ECU, from either the Diagnostic Switch or from a hand ‑held diagnosti c tool (only repaired DTCs may be cleared).

Conguration — The primary objective is to identify a “normal” set of sensors and m odulators fo r the Electro nic Control U nit, so that it will identify future missing sensors and modulators.

Diagnostic Connector — Diagnostic receptacle in vehicle cab for connection of J1939 hand‑held or PC based test equipment. The tester can initiate test sequences, and can also read system parameters.

Diagnostic Switch — A switch used to activate blinks codes. Differential Braking — Application of brake force to a spinning

wheel so that tor que can be applied to wh eels which are not slipping.

ECU — Electronic Control Unit. ESP — Electron ic Stability Program. Full stability functi on that

includes RSP & YC subfunctions. Diagnostic Tr ouble Code — A condition that interferes with the

generation or transmission of response or control signals in the vehicle's ABS system t hat c oul d lead to t he fu nct io nalit y of t he ABS system becoming inoperable in whole or in part.

FMVSS-121 — Federal Mot or Vehicle Safety Standar d which regulates air brake systems.

Hill Start (or “ Hill Start Assist”) HS/HSA — This feature interfaces between the transmission and braking system to help the driver prevent the vehicle from rolling downhill when moving up a steep incline from a stationary position.

IR — Independent Regulat ion. A control method in whi ch a wheel is cont rolled at optimum slip, a point w here retardation and stabilit y are maximized. The br ake pressure that is best for the wheel in question is directed individually into each brake chamber.

J1939 — A high speed data link used for communications between the ABS ECU engine, transmission and retarders.

LAS — Lateral Acceleration Sensor. MIR — Mo d i  ed In dependent Reg u l a t i o n . A method of controlling

the opposite sides of a steer axle during ABS operation so that torque steer and stopping distance are minimized.

PLC — Power Line Carrier. The serial communication protocol used to commun icate with the trailer over the bl ue full time power wire.

PMV — Pres sure M odu lator Valve. An air valve wh ic h is use d to vent or block air to the b rake chambers to limit or reduce brake torque.

QR — Quick Release. Quick release valves allow faster release of air from the br ake chamber af ter a brake application. To balance the system, qu i ck release valves have hold off sprin g s that produce higher crack pressures (when the valves open).

Relay Valve — Increase s the a ppli cat ion s peed o f the se r vi ce brake. Installed near b rakes wi th lar ger air c ham ber s (typ e 24 or 30). The treadle valve ac tivates the relay valve with a n air signal. The relay valve then connects its supply port to its delivery ports. Equal length air hose must connect the delivery ports of the relay valve to the brake chambers.

Retard er Relay — A r elay which i s used to disab le a retard er when ABS is triggered.

RSP

— Roll Stabilit y Program. An all ‑axle A BS solution th at helps reduce veh icle speed by applying al l vehicle brakes as needed, reducing the tendency to roll over.

SAS — Steering Angle Sensor. Sensor Clamping Sleeve — A beryllium c o pp er sl eeve whi c h

has ngers cut into it. It is pre s sed bet wee n an ABS se nsor and

mounting hole to hold the sensor in place. Stored Diagnostic Trouble Codes — A DTC that occurr ed i n

the past.

TCS — T raction Control System, another name for AT C or ASR. TCV — Traction Control Valve. Tone Ring — A ring that is usually pressed into a wheel hub that

has a series of teeth (usually 100) and provides actuation for the speed sensor. Note maximum run out is .008.

YC — Y aw Control. Helps stabilize rotational dynamics of vehicle. YRS — Yaw Rate Sensor.

APPENDIX A: TROUBLESHOOTING A 12-7 BLINK CODE, EQUIVALENT TO A (SID-93 FMI-4) (SPN-0802 FMI-04) DIAGNOSTIC TROUBLE CODE (DTC)

Bendix® EC-80™ ESP® Electronic Control Unit (ECU)

1) Remove the X1, X2, X3 and X4 connectors from the ECU.

2) Using X1‑1 as the ground connection, check for resistance for the entire X2 connector. There should be no resistance

to ground found. Please ll out worksheet on this page.

3) Using X1‑1 as the ground connection, check for resistance for X1‑4 and X1‑5. There should be no resistance to ground.

4) Using X1‑1 as the ground connection, check for resistance for X3‑4, X3‑6, X3‑7, X3‑9, X3‑10, X3‑13, X3‑3 and X3‑5. There should be no resistance to ground. (Even if the vehicle is not

congured for 6S/6M).

5) Using X1‑1 as the ground connection, check for resistance for X4‑6, X4‑9 and X4‑12. There should be no resistance to ground.

6) Troubleshoot any pin that has resistance to ground. If no issues are found continue to step 7.

7) Reconnect the X1 connector only and apply IGN power to the ECU and using the DTC screen of Bendix® ACom® Diagnostic Software, clear all DTCs. Re‑check for any DTCs. If the 12‑7 DTC is still present, the problem is the Traction Solenoid Wiring or Solenoid.

8) If the 12‑7 DTC does not reappear , remove power and connect the X2 connector, reapply power, then clear all DTCs. If the 12‑7 DTC is no longer present, connect the X3 connector and clear all DTCs.

9) If at this point the 12‑7 DTC is not present, the problem is with the X4 connector.

For Peterbilt® & Kenworth® Trucks Only:

Clear all DTCs. If the 12‑7 DTC reappears, the issue is

10) on the X4 connector. Otherwise, proceed to the next step.

11) Disconnect all modulators and the traction solenoid. Clear all DTCs. If the DTC does not reappear, connect one modulator and Traction Solenoid at a time, until the DTC reappears. Otherwise, continue to the next step.

12) Make sure all modulators and the traction solenoid are connected. Disconnect the ABS bulkhead connector at the engine (top‑left side) and remove Pins 1, 2, 11 &12. Reconnect the connector and apply IGN power to the ECU. Using Bendix ACom Diagnostics, clear all DTCs. If the 12‑7 DTC returns, the problem is either the wiring harness inside the cab or the ECU.

Record Resistances Below: X1-1 for ground point

X1 Pin Resistance X1‑4 X1‑5

X2 Pin Resistance X2‑1 X2‑2 X2‑3 X2‑4 X2‑5 X2‑6 X2‑7 X2‑8 X2‑9 X2‑10 X2‑11 X2‑12 X2‑13 X2‑14 X2‑15 X2‑16 X2‑17 X2‑18

X3 Pin Resistance X3‑4 X3‑5 X3‑6 X3‑7 X3‑8 X3‑9 X3‑10 X3‑13

X4 Pin Resistance X4‑6

X4‑9 X4‑12

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

168 3 6 2 Battery Voltage Too High ON ON 168 4 6 1 Battery Voltage Too Low ON ON

564 3 25 3 Differential Lock Solenoid Shorted To Voltage ON ON 564 4 25 2 Differential Lock Solenoid Shorted To Ground ON

564 5 25 1 Differential Lock Solenoid Open ON ‑ 564 13 25 7 Output Conguration Error ‑ Differential ON ‑

575 14 12 17

576 14 12 3 ATC or ESP Disabled or Dynamometer Test Mode Active ON 614 3 12 32 614 3 25 6 I/O 3 Shorted to Voltage

614 4 25 5 I/O 3 Shorted to Ground 614 5 25 4 I/O 3 Open Circuit 614 13 25 8 615 14 12 19 Maximum Number of Pressure Modulator Valve (PMV) Cycles Exceeded 615 14 12 20 Maximum Number of Traction Control Valve (TCV) Cycles Exceeded ‑ ‑

614 3 12 32 614 3 25 6 I/O 3 Shorted to Voltage

614 4 25 5 I/O 3 Shorted to Ground 614 5 25 4 I/O 3 Open Circuit 614 13 25 8 615 14 12 19 Maximum Number of PMV Cycles Exceeded 615 14 12 20 Maximum Number of TCV Cycles Exceeded ‑ ‑

629 2 13 4 ECU DTC (2678C) ON ON 629 2 13 5 ECU DTC (1C) ON ON 629 2 13 7 Conguration Mismatch ON ON 629 2 13 17 ECU DTC (C8C) ON ON

629 8 12 29 Air System / Mechanical Component ON ON

629 12 13 3 ECU DTC (10) ON ON 629 12 13 14 ECU DTC (C6) ON ON 629 12 13 15 ECU DTC (CF) ON ON 629 12 13 16 ECU DTC (C0) ON ON

629 14 12 28 Air System / Mechanical Component ON ON 629 14 12 30

FMI

(J1939)

‑ 1 1 No DTCs ‑ ‑

Blink Code

Equivalent(s) (1st

Digit)

(2nd

Lamp Status

Diagnostic Trouble Code (DTC) Description

ABS

Power Supply DTCs

Miscellaneous DTCs

ABS Disabled Due To Special Mode Or Off‑Road ABS Active.

Note: The ABS warning lamp will be ashing indicating the is in ABS off-

road mode

I/O 2 or 3 Shorted High (EC‑80 ATC) OR I/O 2 or 3 Shorted High or Stop Lamp Output Error (ESP EC‑80)

Output Conguration Error ‑ I/O 3 ‑ ON

I/O 2 or 3 Shorted High (EC‑80 ATC) OR I/O 2 or 3 Shorted High or Stop Lamp Output Error (ESP EC‑80)

Output Conguration Error ‑ I/O 3 ‑ ON

ECU DTCs (Also see other 629 codes)

Miscellaneous DTCs

ECU DTCs (Also see other 629 codes)

Miscellaneous DTCs

ESP Disabled Due to Off‑Road Mode ‑ ON

ATC/

ESP

‑ ON

‑ ON ‑ ON

‑ ‑

‑ ON ‑ ON

‑ ‑

‑

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

629 14 13 1 ECU DTC (5FC) ON ON 630 12 13 6 ECU DTC(6CD) ON ON 630 12 13 10 ECU DTC (5F3) ON ON 630 12 13 19 ECU DTC (63) 630 12 13 20 ECU DTC (6E) ON ON 630 12 13 28 ECU DTC (7CD) ON ON 630 13 13 2 ECU DTC (5CD) ON ON 630 13 13 8 ECU DTC (56) ON ON 630 13 13 9 ECU DTC (CA3C) ON ON 630 13 13 18 ECU DTC (CC) ON ON 630 13 13 21 ECU DTC (6C) ON ON 630 13 13 22 ECU DTC (63C) ON ON 630 13 13 25 VIN Mismatch 630 13 13 26 Valve Conguration Mismatch 630 13 13 29 ECU DTC (5D) ON ON 630 14 13 13 Conguration Mismatch ON ON

639 2 11 2 J1939 Electronic Retarder Time‑out or Invalid Signal ON ON 639 2 11 3 J1939 Electronic Engine Controller 1 Time‑out or Invalid Signal 639 2 11 4 J1939 Electronic Engine Controller 2 Time‑out or Invalid Signal 639 2 11 5 J1939 AIR Message Time‑out or Invalid Signal 639 2 11 6 ESP J1939 CAN Message Time‑out 639 2 11 7 Time‑out or Invalid CAN Data for ETC7/VP15 639 2 11 8 Time‑out or Invalid Data on XBR ‑ ‑ 639 2 11 10 J1939 Electronic Transmission Controller 1 Time‑out or Invalid Signal ON ‑ 639 2 11 11 AUXIO CAN Message Time‑out ‑ ‑ 639 2 11 12 J1939 Hill Start Aid Switch Signal Not Available ‑ HSA LAMP ON ‑ ‑ 639 2 11 14 J1939 CAN Message Related to ESP is Incomplete ‑ ON 639 2 11 15 J1939 Electronic Engine Controller 3 Time‑out or Invalid Signal 639 2 11 16 J1939 Electronic Transmission Controller 2 Time‑out 639 2 11 20 J1939 EAC1 Time‑out or Invalid Signal 639 2 11 21 CAN Message CGW_C1 Time‑out or Invalid Signal 639 2 11 22 CAN Message ASC1_CLCS Time‑out or Invalid Signal 639 2 11 23 J1939 CCVS Time‑out or Invalid Signal 639 2 11 24 J1939 TCO(Tachograph) Time‑out 639 2 11 28 639 2 26 1 J1939 CAN Time‑out of ESP Message 639 2 26 2 Time‑out or Invalid CAN Data – CCVS 2 ESP Message

639 2 26 3 639 2 26 4 Time‑out or Invalid CAN Data – EEC2 ESP Message

639 2 26 5 Time‑out or Invalid CAN Data – Driveline Line Retarder ESP Message 639 2 26 6 Time‑out or Invalid CAN Data – Engine Retarder ESP Message 639 2 26 7 Time‑out or Invalid CAN Data – Exhaust Retarder ESP Message 639 2 26 8 Time‑out or Invalid CAN Data – PROP XBR ESP Message 639 2 26 9 Time‑out or Invalid CAN Data – Transmission Retarder ESP Message

639 2 26 10 639 2 26 11 Time‑out or Invalid AUX I/O – ESP Message 639 2 26 12

FMI

(J1939)

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Lamp Status

Diagnostic Trouble Code (DTC) Description

ABS

ECU DTCs (Also see other 629 codes)

J1939 DTCs

J1939 Proprietary XBR Message Out‑of‑Range ‑ ON

Time‑out or Invalid CAN Data – Electronic Engine Controller 1 ESP Message

Time‑out or Invalid CAN Data – Electronic Transmission Controller 1 ESP Message

Time‑out or Invalid Data for Conguration of Electronic Engine Controller 1

ESP Message

ATC/

ESP

‑ ‑

‑ ON ‑ ON

‑ ON ‑ ON ‑ ON ‑ ON ‑ ‑

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON ‑ ON

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON ‑ ON ‑ ON

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

639 2 26 13 Invalid Data Transfer Time‑out of EC1 ESP Message 639 2 26 14 639 2 26 15 Time‑out or Invalid CAN Data – Electronic Engine Controller ESP Message 639 2 26 16 639 2 26 17 Time‑out or Invalid Data for Conguration of Engine Retarder ESP Message 639 2 26 18 639 2 26 19

639 2 26 20 Invalid Data Transfer Time‑out of Driveline Line Retarder ESP Message 639 2 26 21 Invalid Data Transfer Time‑out of Engine Retarder ESP Message 639 2 26 22 Invalid Data Transfer Time‑out of Exhaust Retarder ESP Message 639 2 26 23 Time‑out or Invalid CAN Data – CCVS ESP Message 639 2 26 24 Time‑out or Invalid CAN Data – TCO ESP Message 639 2 26 25 Invalid Data Transfer Time‑out of Driveline Line Retarder ESP Message 639 2 26 26 ESP Related CM3 Time‑out at J1939

639 2 26 27 639 2 26 28 Time‑out or Invalid CAN Data – Electronic Axle Controller 1ESP Message

639 5 11 29 J1939 CAN Messages Are Not Being Transmitted / Received ON ON 639 12 11 1 J1939 Serial Link ON ON

789 1 2 1 Steer Axle Left WSS Excessive Air Gap ON ON 789 2 2 3 Steer Axle Left WSS Open or Shorted ON ON 789 7 2 5 Steer Axle Left WSS Wheel End ON ON

789 8 2 6 Steer Axle Left Erratic Sensor Signal ON ON 789 9 2 2 Steer Axle Left WSS Signal Low at Drive Off ON ON 789 10 2 4 Steer Axle Left WSS Loss of Sensor Signal ON ON 789 13 2 7 Steer Axle Left WSS Tire Size Calibration ON ON 790 1 3 1 Steer Axle Right WSS Excessive Air Gap ON ON 790 2 3 3 Steer Axle Right WSS Open or Shorted ON ON 790 7 3 5 Steer Axle Right WSS Wheel End ON ON 790 8 3 6 Steer Axle Right Erratic Sensor Signal ON ON 790 9 3 2 Steer Axle Right WSS Signal Low at Drive Off ON ON 790 10 3 4 Steer Axle Right WSS Loss of Sensor Signal ON ON 790 13 3 7 Steer Axle Right WSS Tire Size Calibration ON ON 791 1 4 1 Drive Axle Left WSS Excessive Air Gap ON ON 791 2 4 3 Drive Axle Left WSS Open or Shorted ON ON 791 7 4 5 Drive Axle Left WSS Wheel End ON 791 8 4 6 Drive Axle Left Erratic Sensor Signal ON ON 791 9 4 2 Drive Axle Left WSS Signal Low at Drive Off ON ON 791 10 4 4 Drive Axle Left WSS Loss of Sensor Signal ON ON 791 13 4 7 Drive Axle Left Tire Size Calibration ON ON 792 1 5 1 Drive Axle Right WSS Excessive Air Gap ON ON 792 2 5 3 Drive Axle Right WSS Open or Shorted ON ON 792 7 5 5 Drive Axle Right WSS Wheel End ON ON 792 8 5 6 Drive Axle Right Erratic Sensor Signal ON ON 792 9 5 2 Drive Axle Right WSS Signal Low at Drive Off ON ON 792 10 5 4 Drive Axle Right WSS Loss of Sensor Signal ON ON 792 13 5 7 Drive Axle Right Tire Size Calibration ON ON 793 1 14 1 Additional Axle Left WSS Excessive Air Gap ON ON

FMI

(J1939)

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Diagnostic Trouble Code (DTC) Description

Time‑out or Invalid Data for Conguration of Driveline Line Retarder ESP

Message

Time‑out or Invalid CAN Data – Electronic Transmission Controller 2‑ Message Required for ESP

Time‑out or Invalid Data for Conguration of Exhaust Retarder ESP

Message

Time‑out or Invalid Data for Conguration of Transmission Retarder ESP Message

Time‑out of message or Invalid Data Received from Transmission Transfer information on J1939 ‑ Message Required for ESP

Wheel Speed Sensor DTCs

Lamp Status

ABS

ATC/

ESP

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON ‑ ON

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

793 2 14 3 Additional Axle Left WSS Open or Shorted ON ON 793 7 14 5 Additional Axle Left WSS Wheel End ON ON 793 8 14 6 Additional Axle Left Erratic Sensor Signal ON ON 793 9 14 2 Additional Axle Left WSS Signal Low at Drive Off ON ON 793 10 14 4 Additional Axle Left WSS Loss of Sensor Signal ON ON 793 13 14 7 Additional Axle Left Tire Size Calibration ON ON 794 1 15 1 Additional Axle Right WSS Excessive Air Gap ON ON 794 2 15 3 Additional Axle Right WSS Open or Shorted ON ON 794 7 15 5 Additional Axle Right WSS Wheel End ON ON 794 8 15 6 Additional Axle Right Erratic Sensor Signal ON ON 794 9 15 2 Additional Axle Right WSS Signal Low at Drive Off ON ON 794 10 15 4 Additional Axle Right WSS Loss of Sensor Signal ON ON 794 13 15 14 Additional Axle Right Tire Size Calibration ON ON

795 5 7 7 Steer Axle Left PMV Common Open Circuit ON ON 795 13 7 8 Steer Axle Left PMV Conguration Error ON ON

796 5 8 7 Steer Axle Right PMV Common Open ON ON 796 797 5 9 7 Drive Axle Left PMV Common Open Circuit ON ON 797 13 9 8 Drive Axle Left PMV Conguration Error ON ON 798 5 10 7 Drive Axle Right PMV Common Open Circuit ON ON 798 13 10 8 Drive Axle Right PMV Conguration Error ON ON 799 5 16 7 AA Left PMV Common Open Circuit ON ON 799 13 16 8 AA Left PMV Conguration Error ON ON 800 5 17 7 Additional Axle Right PMV Common Open Circuit ON ON 800 13 17 8 AA Right PMV Conguration Error ON ON

801 2 12 4 Retarder Relay Open Circuit or Shorted to Ground ON 801 3 12 5 Retarder Relay Open Circuit or Shorted to Voltage ON ‑

802 3 12 8 PMV Common Shorted to Voltage ON ON 802 4 12 7 PMV Commons Shorted to Ground ON ON

802 12 13 11 ECU DTC (F1A) ON ON 802 12 13 12 ECU DTC (F14) ON 805 14 12 9 ATC Disabled to Prevent Brake Fade - -

806 3 18 2 TCV DA Solenoid Shorted to Voltage ON ON 806 4 18 1 TCV DA Solenoid Shorted to Ground 806 5 18 3 TCV DA Solenoid Open Circuit 806 13 18 4 TCV DA Valve Conguration Error ON ON 807 3 19 2 TCV SA Solenoid Shorted to Voltage 807 4 19 1 TCV SA Solenoid Shorted to Ground 807 5 19 3 TCV SA Solenoid Open Circuit ON ON 807 13 19 4 TCV SA Valve Conguration Error ON ON

810 7 12 11 Wheel Speed Sensors Reversed on an Axle ON ON

811 2 12 6 ABS Dash Indicator Circuit DTC ON 811 13 12 38

815 13 14 10 Additional Axle WSS Conguration Error ON ON

FMI

(J1939)

13 8 8 Steer Axle Right PMV Conguration Error ON ON

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Diagnostic Trouble Code (DTC) Description

Pressure Modulator Valve (PMV) DTCs

Miscellaneous DTCs

Pressure Modulator Valve (PMV) DTCs

Miscellaneous DTCs

Traction Control Valve (TCV) DTCs

Miscellaneous DTCs

Warning Lamp Ground Pin Connected to GND in Conict with Conguration

Settings

Lamp Status

ABS

ATC/

ESP

‑

‑ ON ‑ ON

‑

ON ‑

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

932 3 7 5 Steer Axle Left PMV Hold Solenoid Shorted to Voltage ON ON 932 4 7 4 Steer Axle Left PMV Hold Solenoid Shorted to Ground ON ON 932 5 7 6 Steer Axle Left PMV Hold Solenoid Open Circuit ON ON 933 3 8 5 Steer Axle Right PMV Hold Solenoid Shorted to Voltage ON ON 933 4 8 4 Steer Axle Right PMV Hold Solenoid Shorted to Ground ON ON 933 5 8 6 Steer Axle Right PMV Hold Solenoid Open Circuit ON ON 934 3 9 5 Drive Axle Left PMV Hold Solenoid Shorted to Voltage ON ON 934 4 9 4 Drive Axle Left PMV Hold Solenoid Shorted to Ground ON ON 934 5 9 6 Drive Axle Left PMV Hold Solenoid Open Circuit ON ON 935 3 10 5 Drive Axle Right PMV Hold Solenoid Shorted to Voltage ON ON 935 4 10 4 Drive Axle Right PMV Hold Solenoid Shorted to Ground ON ON 935 5 10 6 Drive Axle Right PMV Hold Solenoid Open Circuit ON ON 936 3 16 5 AA Left PMV Hold Solenoid Shorted to Voltage ON ON 936 4 16 4 AA Left PMV Hold Solenoid Shorted to Ground ON ON 936 5 16 6 AA Left PMV Hold Solenoid Open Circuit ON ON 936 13 16 11 937 3 17 5 AA Right PMV Hold Solenoid Shorted to Voltage ON ON 937 4 17 4 AA Right PMV Hold Solenoid Shorted to Ground ON ON 937 5 17 6 AA Right PMV Hold Solenoid Open Circuit ON ON 937 13 17 11 938 3 7 2 Steer Axle Left PMV Release Solenoid Shorted to Voltage ON ON 938 4 7 1 Steer Axle Left PMV Release Solenoid Shorted to Ground ON ON 938 5 7 3 Steer Axle Left PMV Release Solenoid Open Circuit ON ON 939 3 8 2 Steer Axle Right PMV Release Solenoid Shorted to Voltage ON ON 939 4 8 1 Steer Axle Right PMV Release Solenoid Shorted to Ground ON ON 939 5 8 3 Steer Axle Right PMV Release Solenoid Open ON ON 940 3 9 2 Drive Axle Left PMV Release Solenoid Shorted to Voltage ON ON 940 4 9 1 Drive Axle Left PMV Release Solenoid Shorted to Ground ON ON 940 5 9 3 Drive Axle Left PMV Release Solenoid Open Circuit ON ON 941 3 10 2 Drive Axle Right PMV Release Solenoid Shorted to Voltage ON ON 941 4 10 1 Drive Axle Right PMV Release Solenoid Shorted to Ground ON ON 941 5 10 3 Drive Axle Right PMV Release Solenoid Open Circuit ON ON 942 3 16 2 AA Left PMV Release Solenoid Shorted to Voltage ON ON 942 4 16 1 AA Left PMV Release Solenoid Shorted to Ground ON ON 942 5 16 3 AA Left PMV Release Solenoid Open Circuit ON ON 942 13 16 10 943 3 17 2 AA Right PMV Release Solenoid Shorted to Voltage ON ON 943 4 17 1 AA Right PMV Release Solenoid Shorted to Ground ON ON 943 5 17 3 AA Right PMV Release Solenoid Open Circuit ON ON 943 13 17 10

1043 2 12 14 ESP sensor supply too high or too Low 1043 2 12 22 1045 2 12 2 Stop Light Switch Defective ON ON 1045 2 12 27 Brake Lamp Input Mismatch With Brake Lamp Output ON ON 1045 7 12 1 Stop Lamp Switch Not Detected

FMI

(J1939)

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Lamp Status

Diagnostic Trouble Code (DTC) Description

ABS

Pressure Modulator Valve (PMV) DTCs

Output Conguration Error ‑ Left Additional Axle Hold ON ON

Output Conguration Error ‑ Additional Axle Right Hold ON ON

Output Conguration Error ‑ Additional Axle Left Release ON ON

Output Conguration Error ‑ Additional Axle Right Release ON ON

Miscellaneous DTCs

U‑ Bat too high or too Low for ESP sensor ‑ ON

ATC/

ESP

‑ ON

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

1056 3 20 2 Trailer PMV: Release Solenoid Shorted to Voltage ON ON 1056 3 20 5 Trailer PMV: hold Solenoid Shorted to Voltage ON ON 1056 4 20 1 Trailer PMV: Release Solenoid Shorted to Ground 1056 4 20 4 Trailer PMV: hold Solenoid Shorted to Ground

1056 5 20 3 Trailer PMV: Release Solenoid Open Circuit 1056 5 20 6 Trailer PMV: hold Solenoid Open Circuit 1056 5 20 7 Trailer PMV: Common Open Circuit 1056 13 20 8 Trailer PMV: Conguration Error

1059 2 24 3 PS3 Open or Shorted 1067 2 24 1 PS1 Open or Shorted 1067 3 24 5 PS Supply Voltage High Error 1067 4 24 7 PS Supply Voltage Low Error 1067 6 24 8 PS Supply Voltage Error 1067 7 24 6 PS Not Calibrated

1067 11 24 4 1067 14 24 9 Pressure Sensor not congured.

1068 2 24 2 PS2 Open or Shorted

1238 14 12 37 ATC disable by switch

1807 2 21 3 SAS Static Signal 1807 2 21 4 SAS Signal Out of Range 1807 2 21 5 SAS Signal Reversed 1807 2 21 7 SAS Gradient Error 1807 2 21 9 SAS Long Term Calibration Error 1807 2 21 10 SAS Plausibility Check (Ref YAW Rate) 1807 9 21 8 SAS CAN Time‑out 1807 12 21 6 SAS Signal Invalid 1807 13 21 1 SAS Not Calibrated 1807 13 21 2 SAS Calibration in Progress 1807 13 21 11 SAS Detected But Not Congured

1808 2 22 1 YRS Signal Out of Range 1808 2 22 2 YRS Reversed Signal 1808 2 22 3 YRS Invalid Signal 1808 2 22 4 YRS Gradient Error 1808 2 22 6 YRS Static BITE Error 1808 2 22 7 YRS Dynamic BITE Error 1808 2 22 8 YRS Fast Calibration Error 1808 2 22 9 YRS Static Calibration Error 1808 2 22 10 YRS Normal Calibration Error 1808 2 22 12 YRS Plausibility Check (Ref Yaw Rate) 1808 2 22 13 YRS Plausibility Error (Inside Model Based Limits) 1808 2 22 14 YRS Plausibility Error (Outside Model Based Limits) 1808 2 22 16 YRS Vibration Detected 1808 9 22 5 YRS CAN Time‑out 1808 13 22 17 YRS Detected But Not Congured 1808 14 23 7 Erratic ESP Signal

FMI

(J1939)

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Digit)

Diagnostic Trouble Code (DTC) Description

Pressure Modulator Valve (PMV) DTCs

Brake Demand/Load Sensor DTCs

(PS1/PS2 Plausibility Error) Brake Demand Primary and Secondary Circuit Pressure Sensor Plausibility Error

Miscellaneous DTCs

Steering Angle Sensor DTCs

Yaw Rate Sensor DTCs

Lamp Status

ABS

ATC/ ESP

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON ‑ ON

‑ ON

‑ ‑

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

APPENDIX B: J1939 SPN AND FMI CODES AND THEIR BENDIX® BLINK CODE EQUIVALENTS

Bendix

SPN

(J1939)

1809 2 23 1 LAS Signal of Range 1809 2 23 3 LAS Static Calibration Error 1809 2 23 4 LAS Long Term Calibration Error 1809 2 23 5 LAS Plausibility Error (Inside Model Based Limits) 1809 2 23 6 LAS Plausibility Error (Outside Model Based Limits) 1809 13 22 15 1809 13 23 2 LAS Calibration in Progress

2011 31 11 26 ABS ECU CAN Address Conict ON

2051 31 11 27 TPMS ECU CAN Address Conict ‑ TPMS INDICATOR LAMP ON ‑ ‑

2622 2 12 24 HSA lamp Open Circuit or Shorted to GND ON 2622 3 12 26 HSA valve: Solenoid Shorted to Voltage ON ‑ 2622 3 12 31 HSA lamp Shorted to Voltage ON ON 2622 4 12 25 HSA valve: Solenoid Shorted to Ground 2622 5 12 33 HSA valve: Solenoid Open Circuit ‑ ‑

2984 3 12 34 Bendix 2984 4 12 35 Bendix eTrac Solenoid Shorted to Ground

FMI

(J1939)

Blink Code

Equivalent(s)

(1st

Digit)

(2nd

Lamp Status

Diagnostic Trouble Code (DTC) Description

ABS

Lateral Acceleration Sensor DTCs

YRS‑ SAS Signal Cross‑Check Incomplete ‑ ON

Miscellaneous

HS/HSA Hill Start Feature DTCs

Bendix® eTrac™ DTCs

eTrac™ Solenoid Shorted to Voltage ‑ ON

ATC/

ESP

‑ ON ‑ ON ‑ ON ‑ ON ‑ ON

‑ ON

‑ ‑

‑ ON

‑

Figures Used

Figure 1 - Bendix® ESP® EC‑80™ Controller ....................................................................1

Figure 2 - Bendix® WS‑24™ Wheel Speed Sensors .........................................................3

Figure 3 - Example Of A Bendix® M‑40X™ Modulator .....................................................3

Figure 4 - Examples Of Steering Angle Sensors ............................................................3

Figure 5 - Yaw And Brake Demand/Load Sensors ..........................................................4

Figure 6 - Additional Valves Necessary For The Hill Start Feature .................................4

Figure 7 - Bendix ESP EC‑80 Controller Features ..........................................................5

Figure 8 - Power Line Without PLC Signal ......................................................................5

Figure 9 - Power Line With PLC Signal ...........................................................................5

Figure 10 - Bendix ESP EC‑80 Controller Indicator Lamp Behavior ...............................8

Figure 11 - Vehicle Orientation (Typical) .........................................................................9

Figure 12 - RSP Example ..............................................................................................12

Figure 13 - Yaw Control Example ..................................................................................12

Figure 14 - Typical Vehicle Diagnostic Connector Locations (J1939) ...........................21

Figure 15 - Example Of Blink Code Message ...............................................................21

Figure 16 - Diagnostic Modes........................................................................................22

Figure 17 - System Conguration Check .......................................................................23

Figure 18 - Bendix® ACom® Diagnostics .......................................................................24

Figure 19 - The Bendix® Remote Diagnostic Unit..........................................................24

Figure 20 - Diagnostic Trouble Codes ...........................................................................25

Figure 21 - Bendix EC‑80 Controller Component Connectors ......................................50

Figure 22 - WS‑24 Wheel Speed Sensor Installation (S‑Cam And Air Disc Brake) ......51

Figures 23 & 24 - Troubleshooting: Wiring Schematics ...........................................52‑53

Full Table of Contents

Introduction .............................................................................................................................................1

Yaw Control (YC) ....................................................................................................................................3

Roll Stability Program (RSP) ..................................................................................................................3

Components ........................................................................................................................................3‑4

Bendix® eTrac™ Automated Air Suspension Transfer System ................................................................4

ECU Mounting ........................................................................................................................................4

Hardware Congurations .......................................................................................................................4

Bendix® ESP® EC‑80™ Controllers USE Power Line Carrier (PLC) .......................................................5

Bendix ESP EC‑80 Controller Inputs ..................................................................................................... 5

Bendix ESP EC‑80 Controller Outputs ...............................................................................................6‑7

Indicator Lamps And Power‑Up Sequence .........................................................................................8‑9

ABS Operation ..................................................................................................................................9‑10

ATC Operation ..................................................................................................................................11‑12

Bendix® ESP® ABS With Stability Control .......................................................................................12‑13

Important Safety Information About The Bendix ESP System ........................................................ 13‑14

Dynamometer Test Mode ..................................................................................................................... 14

Automatic Tire Size Calibration ............................................................................................................ 14

System Impact During Active Trouble Codes ....................................................................................... 15

ABS Partial Shutdown .......................................................................................................................... 15

System Reconguration .......................................................................................................................16

Electronic Control Unit (ECU) Reconguration .................................................................................... 16

Data Storage ........................................................................................................................................16

Troubleshooting ...........................................................................................................................17-53

Removal Of The Bendix ESP EC‑80 Controller Assembly .................................................................. 17

Obtaining A New Bendix ESP EC‑80 Controller ................................................................................. 17

Installing A New Bendix ESP EC‑80 Controller ................................................................................... 17

Steering Angle Sensor Maintenance .................................................................................................... 18

Steering Angle Sensor Calibration .......................................................................................................18

Removal Of The Yaw Rate/Lateral Acceleration Sensor ..................................................................... 19

Brake Demand Sensor Calibration ....................................................................................................... 20

Pressure Sensor Installation Requirements ......................................................................................... 20

Troubleshooting: Blink Codes and Diagnostic Modes .....................................................................21‑23

ECU Diagnostics .................................................................................................................................. 21

Blink Codes .......................................................................................................................................... 21

Diagnostic Modes .................................................................................................................................22

Troubleshooting: Using PC‑Based or Hand‑Held Diagnostic Tools ................................................24‑25

Bendix® ACom® Diagnostic Software ...................................................................................................24

Bendix® RDU™ (Remote Diagnostic Unit) ............................................................................................. 24

Active or Inactive Diagnostic Trouble Codes: Index and Troubleshooting Tests .............................26‑47

Troubleshooting: Connectors ...............................................................................................................48

Troubleshooting: Wiring ...................................................................................................................49‑53

Glossary ...............................................................................................................................................54

APPENDIX A: Troubleshooting a 12‑7 Blink Code DTC (SID‑93 FMI‑4) (SPN‑0802 FMI‑04) ...........55

APPENDIX B: J1939 SPN and FMI Codes and their Bendix Blink Code Equivalents ...................56‑62

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BENDIX SD-13-4986 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual