Bendix MC-30 User Manual

Bendix® MC-30™ Trailer ABS Controller Assembly

SD-13-4834

LED Diagnostic

Display

ABS Modulator

Connector

(MOD1)

Delivery Ports

3/8" NPT (x4)

TABLE OF CONTENTS PAGE

Components . . . . . . . . . . . . . . . . . . . . . . .2

MC-30™ Controller Comparison to MC-12™ Modulator. .2

MC-30™ Controller Assemblies. . . . . . . . . . . . . .2

MC-30™ Controller with PLC . . . . . . . . . . . . . . .2

Wiring Harness (Pigtail) . . . . . . . . . . . . . . . . .3

Power and Ground. . . . . . . . . . . . . . . . . . . .5

ABS Indicator Lamp . . . . . . . . . . . . . . . . . . .5

Wheel Speed Sensors . . . . . . . . . . . . . . . . . .5

M-30T™ ABS Modulator-Valves . . . . . . . . . . . . .6

J1708/J1587 Diagnostic Link . . . . . . . . . . . . . .6

Auxiliary I/O . . . . . . . . . . . . . . . . . . . . . . .6

MC-30™ Controller Power-up Sequence . . . . . . . . .7

ABS Operation . . . . . . . . . . . . . . . . . . . . . .7

Self-Conﬁ guration/Control Toggle . . . . . . . . . . . .8

Other Conﬁ gurable Parameters . . . . . . . . . . . . 11

Odometer Function. . . . . . . . . . . . . . . . . . . 11

Fault Detection. . . . . . . . . . . . . . . . . . . . . 11

MC-30™ Controller Diagnostic Display . . . . . . . . . 12

Blink Code Diagnostics . . . . . . . . . . . . . . . . 13

Bendix ABS Diagnostic Tools . . . . . . . . . . . . . 16

Contacting Bendix . . . . . . . . . . . . . . . . . . . 16

Correct Maintenance Practices . . . . . . . . . . . . 16

Servicing the MC-30™ Controller. . . . . . . . . . . . 17

Replacing the EC-30T™ Controller . . . . . . . . . . . 17

Overhaul of the Relay Valve . . . . . . . . . . . . . . 17

MC-12™ Modulator / MCE-12 Service-Replacement. . 17 Reinstallation of the MC-30™ Controller or

M-30T™ Modulator-Valve. . . . . . . . . . . . . . . . 18

Leakage and Operational Tests . . . . . . . . . . . . 18

ABS Wiring. . . . . . . . . . . . . . . . . . . . . . . 18

Troubleshooting Flowcharts . . . . . . . . . . . . . . 24

Product Revision / Feature Introduction . . . . . . . . 32

For updates to this Service Data Sheet, please visit www.bendix.com.

Supply Port

1/2" NPT

30-Pin

Connector

Control

Port

1/4" NPT

FIGURE 1 - MC-30™ CONTROLLER TANK (NIPPLE)

MOUNT ASSEMBL Y

MC-30™ CONTROLLER INTRODUCTION

The MC-30™ controller is the Bendix antilock braking system (ABS) controller assembly intended for application on air braked heavy duty trailers, semi-trailers and dollies.

The Bendix® MC-30™ controller features an integral LED diagnostic display with magnetic reset for easy diagnostics and fault code clearing. Blink code diagnostics are standard and advanced diagnostic tool support is also available.

The MC-30™ controller supports PLC communication for indicator lamp, full diagnostics capability and other customized features.

The ABS function of the MC-30™ controller is designed to provide a towed vehicle with improved stability and control during braking while providing the maximum available braking force.

MC-30™ CONTROLLER COMPONENTS

The MC-30™ controller ABS installation consists of the following components:

- EC-30T™ ABS Electronic Control Unit (ECU) (1)

™

- M-30T

ABS modulator-valve with relay function (1 or 2)

- WS-20™ wheel speed sensors (2 or 4)

- Sensors spring clips (2 or 4)

- Trailer mounted ABS indicator lamp

- Pigtail wiring harness

- PLC signal for dash mounted trailer ABS indicator lamp (Towed vehicles manufactured after March 1, 2001)

MC-30™ CONTROLLER COMPARISON TO MC-12™ MODULATOR

The MC-30™ controller has been designed to replace the MC-12™ modulator as the standard Bendix trailer ABS controller assembly for OEM and aftermarket installations. The EC-30T™ controller has a black plastic enclosure similar to the Bendix® EC-30™ tractor ABS controller, and is mounted to the modulator-valve with a bracket. The MC-12™ modulator utilized a metal ECU enclosure and was directly bolted to the modulator body. The MC-30™ controller has a 30-pin electrical connector and the MC-12™ modulator has a 14-pin connector.

The M-30T™ ABS modulator-valve utilizes a 3-pin external electrical connector, where the MC-12™ modulator used a 4-pin internal connector.

Physical MC-30™ MC-12 Feature Controller Modulator

ECU Enclosure Plastic ECU Metal ECU ECU Mounting Bracket Mounted to Directly Mounted to ABS

ABS Modulator Valve Modulator Valve Body ECU Electrical 30-pin 14-pin

Connector ABS Modulator 3-pin External 4-pin Internal Connector Connector Connector

CHART 1 - MC-30™ CONTROLLER AND MC-12™ MODULATOR DIFFERENCES

™

EC-30T™ TRAILER ABS ECU

The EC-30T™ is a plastic electronic controller with a single 30-pin electrical connector. The EC-30T™ controller enclosure is ﬁ lled with a hard epoxy-based potting that seals all internal components from the environment. A patented LED (light emitting diode) diagnostic display and magnetic reset switch are incorporated in the housing for simple, self-contained diagnostics. The design of the EC-30T™ controller’s electronics is robust against radio, electromagnetic and environmental interference.

The EC-30T™ controller is typically mounted to the M-30T™ modulator-valve using four bolts and a bracket. This assembly forms an MC-30™ ABS controller.

The EC-30T™ controller can also be frame rail mounted, independent of the M-30T™ modulator-valve.

FIGURE 2 - MC-30™ CONTROLLER BRACKET (FRAME) MOUNT ASSEMBL Y

MC-30™ CONTROLLER ASSEMBLIES

Tank (Nipple) Mounted

The MC-30™ controller tank-mount assembly is mounted by using a schedule 80 (heavy gauge steel) 1/2" nipple directly between the trailer supply tank and the MC-30™ modulatorvalve supply port. A tank with a reinforced port must be used. See Figure 1 for tank-mount MC-30™ modulator-valve.

CAUTION: The tank-mounted MC-30™ modulator-valve cannot be mounted on a frame or crossmember using the ECU bracket holes.

Bracket (Chassis) Mounted

The MC-30™ controller bracket mount assembly is mounted directly to the trailer frame rail or crossmember. See Figure 2 for bracket mount MC-30™ controller. The bracket studs are secured using three 5/16-18 nuts and lock washers torqued to 180-220 in-lbs.

MC-30™ CONTROLLER WITH PLC

Effective March 1, 2001 all towed vehicles must transmit a signal to control an in-cab trailer ABS indicator lamp. Trailers built after this date will transmit the status of the trailer ABS unit over the ignition power wire (blue wire of the J560 connector) using Power Line Carrier (PLC) communications.

The PLC signal is usually broadcast by the trailer ABS ECU. The application of PLC technology for the heavy vehicle industry is known as PLC4Trucks. MC-30 models with PLC will support communication in accordance with SAE J2497.

Identifying MC-30™ Controller units with PLC

Most MC-30™ controller units will contain PLC capability. However, some MC-30™ controller units installed prior to March 1, 2001 may not. An MC-30™ controller with PLC can be identiﬁ ed by the individual part number label and pin stamp on the EC-30T™ controller housing. On PLC units, the PLC function can be disabled with a diagnostic tool.

™

controller

This will be the case when an MC-30™ controller is installed on a powered vehicle auxiliary axle.

Identifying / Measuring the PLC Signal

An MC-30™ controller with PLC will continuously broadcast PLC messages that indicate trailer ABS status. At powerup or during a trailer ABS fault condition, the MC-30 controller will signal the tractor ABS unit to illuminate the dash mounted trailer ABS indicator lamp.

Diagnostic tools are available that detect the presence of a PLC signal and perform further system diagnostics directly on the power line. For more information on these diagnostic tools, contact Bendix or refer to your local authorized Bendix dealer.

An oscilloscope can also be used to verify the presence and strength of a PLC signal on the power line. The PLC signal is an amplitude and frequency modulated signal. Depending on the load on the power line, the amplitude of the PLC signal can range from 5.0 mV p-p to 7.0 V p-p.

Suggested oscilloscope settings are (AC coupling, 1 volt/ div, 100 µsec/div). The signal should be measured on pin 7 of the J560 connector at the nose of the trailer. See Figure 3 and Figure 4 for examples of PLC measurements using an oscilloscope.

™

All connector leads of the MC-30

™

controller pigtail harness are weather sealed at the connector interface and are clearly labeled for proper installation.

Non over-molded versions of the MC-30™ controller pigtail, shown in Figure 5, are repairable. If repairs are needed, see chart 12 for connector and tool information.

Over-molded versions of the wiring harness must be replaced if corrosion or damage occurs.

ECU Connector

The 30-pin ECU connector of the pigtail is fastened to the EC-30T™ controller with a jackscrew tightened to 15-20 in. lbs. Improper tightening of the connector jackscrew can cause environmental contamination or damage to the EC-30T™ controller. The use of a inch-pound torque wrench is recommended.

Power / ABS Indicator Lamp Connector

The MC-30™ controller pigtail utilizes the TTMA RP 97-99 5-pin Packard Weather Pack connector for brake light power, constant power , ground and the trailer mounted ABS indicator lamp. The Power/ABS Indicator Lamp lead of the pigtail harness is available in various lengths to satisfy installation requirements such as slider axles.

FIGURE 3 - POWER LINE WITHOUT PLC SIGNAL

FIGURE 4 - POWER LINE WITH PLC SIGNAL

MC-30™ CONTROLLER WIRING HARNESS (PIGTAIL)

The EC-30T™ controller utilizes a pigtail wire harness to interface with ABS and other trailer system components. Various pigtail harness part numbers are available from Bendix. The following connectors are optional and may not be present on all pigtail harnesses: Modulator 2, auxiliary , diagnostic, and rear axle wheel speed sensors.

Wheel Speed Sensor Connectors

Two or four wheel speed sensor connectors are provided. These 2-pin connectors are labeled Right Front (RHT FRT), Left Front (LFT FRT), Right Rear (RHT RER) and Left Rear (LFT RER). Right Front and Left Front wheel speed sensor inputs must be used for two sensor installations, even if the wheel speed sensors are not physically located on the forward axle. Extension cables are available from Bendix that will provide longer wheel speed sensor lengths when required by the installation.

ABS Modulator Connectors

One or two modulator connectors are provided. These 3-pin connectors are labeled MOD 1 and MOD 2. Modulator 1 is always used for single modulator installations. For two modulator conﬁ gurations, Modulator 1 is installed at the right or front position. Modulator 2 is installed at the left or rear position. An extension cable must be used for Modulator 2. The remote modulator harness is available in various lengths to satisfy any installation requirement. See Figure 6.

Diagnostic Connector

An optional 4-pin diagnostic connector provides a port for connecting a diagnostic tool. The connector provides ignition power, ground and data lines. Remote diagnostic cables are available from Bendix that will provide a standard J1708/J1587 diagnostic port at the side of the trailer. See Figure 7.

Auxiliary I/O Connector

An optional auxiliary connector provides a connection to the MC-30™ controller auxiliary feature I/O pins. The ﬁ ve auxiliary ground-switch inputs and two auxiliary outputs can be activated and conﬁ gured with a diagnostic tool.

POWER AND GROUND

Trailer electrical power is supplied to the MC-30™ controller from the ignition and brake light circuits. Note: The MC-30™ controller may not function properly when powered with a battery charger. See Chart 2.

3-Pin Modulator 2

3-Pin Modulator 1

(MOD 1)

5-Pin Power and

Indicator Lamp

(MOD2)

(PWR/WL)

ECU Connector Jackscrew

(Tighten to 15-20 in. lbs.)

8-Pin Auxiliary

(AUX)

4-Pin Diagnostic

(DIAG)

Right Front

(RHT FRT)

30-Pin ECU

Connector

Left Front (LFT FRT)

Left Rear

(LFT RER)

Right Rear (RHT RER)

2-Pin Wheel

Speed Sensors

FIGURE 5 - MC-30™ CONTROLLER PIGTAIL HARNESS (4S/2M WITH DIAGNOSTIC AND AUXILIARY CONNECTORS SHOWN)

Pigtail

FIGURE 6 - REMOTE MODULATOR HARNESS (MOD2)

Modulator 2

(MOD2)

To Diagnostic

Pigtail

FIGURE 7 - REMOTE DIAGNOSTIC HARNESS

Tool

Circuit 7-Pin Trailer 5-Pin ABS 30-Pin ECU

Electrical Power Connector Connector Connector

Ignition Power (PLC) Pin 7 B Pin E1

(Blue Wire) Brake Light Power Pin 4 A Pin E3

(Red Wire) Ground Pin 1 E Pin D2

(White Wire) Indicator Lamp N/A D Pin D3

(White/Green Wire) Function Mode Value

Operating Range 8.0 to 16.0 VDC ECU Active 383 mA ABS Active 2.4 A @ 12 VDC

(1 modulator) ABS Active 4.5 A @ 12 VDC

(2 modulators)

Previous Bendix Wheel Speed Sensors

Previous sensors are all replaced by the

Bendix WS-24™ wheel speed sensor shown below.

CHART 2 - POWER AND GROUND

ABS INDICATOR LAMP

Trailer Mounted Lamp

The MC-30™ controller controls an ABS indicator lamp to indicate the trailer ABS status. The MC-30™ controller directly controls the ABS indicator lamp by providing a

12.0 VDC signal to turn it on. The other side of the lamp is grounded. The MC-30™ controller must be powered in order to operate the trailer indicator lamp. Pin D3 of the 30-pin connector is the ABS indicator lamp output.

Dash Mounted Lamp (PLC Controlled)

MC-30™ controller models with PLC will transmit a signal to control a trailer ABS indicator lamp mounted on the dash of the tractor. MC-30™ controller will transmit the status of the trailer ABS unit over the ignition power pin E1 of the 30-pin connector. The ignition power wire (blue wire of the J560 connector) will carry this signal to the towing vehicle. MC-30™ controller models with PLC support communication in accordance with SAE J2497.

WHEEL SPEED SENSORS

Wheel speed data is provided to the MC-30™ controller from the Bendix wheel speed sensors. See Figure 8 for examples. Working with a tone (exciter) ring, the wheel speed sensors provide the MC-30™ controller with an AC signal, which varies in voltage and frequency in relation to the speed of the wheel. The MC-30™ controller is conﬁ gured to receive wheel speed information from 100 tooth tone rings by default. Vehicle axle and ABS control conﬁ gurations determine if two or four wheel speed sensors must be used. See the MC-30™ controller’s electrical system schematic for wheel speed sensor connector pin locations, Figure 16.

90° Speed

Sensors

Straight Speed

Sensors

WS-24

clamping

sleeves have

“BW” in a

diamond

PREVIOUS AND NEW CLAMPING SLEEVES

FIGURE 8 - BENDIX WHEEL SPEED SENSORS

sensors use

clamping

sleeves with

“BX” in a

swoosh

symbol

Wheel Speed Sensor Clips

The sensor spring clip is designed to ﬁ rmly hold the wheel speed sensor in place while also allowing the sensor to adjust in position as the wheel and hub rotate. Wheel bearing play and heavily loaded axles will cause sensors to self-adjust. Proper sensor installation begins by fully inserting the spring clip into the block, with the retaining tabs toward the inside of the vehicle. See Figure 9.

CLIP AND SENSOR INSERTION

FIGURE 9

FIGURE 10

FIGURE 11 - M-30T™ TANK (NIPPLE) MOUNT MODULATOR-VALVE

Tank (Nipple) Mounted

The M-30T™ modulator-valve tank-mount assembly is mounted by using a schedule 80 (heavy gauge steel) 1/2" nipple directly between the trailer supply tank and the M-30T™ modulator-valve supply port. A tank with a reinforced port must be used. See Figure 11.

Bracket (Chassis) Mounted

The M-30T™ modulator-valve bracket mount assembly is mounted directly to the trailer frame rail or crossmember. See Figure 12. The bracket studs are secured using three 5/16-18 nuts and lock washers torqued to 180-220 in-lbs.

J1708/J1587 DIAGNOSTIC LINK

The MC-30™ controller provides a J1708/J1587 diagnostic link with data and power to communicate with the vehicle and various diagnostic tools. Diagnostics, testing, conﬁ guration, data transfer and other functions can be performed using this link. The MC-30™ controller is supported by diagnostic tools such as the MPSI Pro-Link® and Bendix® ABS Diagnostic Software. Ignition power must be provided to the MC-30™ controller for the diagnostic link to be active. See the MC-30™ controller electrical system schematic for J1708/J1587 diagnostic link pin locations, Figure 16.

FIGURE 12 - M-30T™ BRACKET (FRAME) MOUNT MODULATOR-VALVE

Wheel Speed Sensor Adjustment

Speed sensors are properly adjusted by gently pushing (not striking) the sensor into the clip until it makes contact with the face of the tone ring. The wheel speed sensor will automatically adjust as the wheel rotates. If rotating the wheel causes a gap of 0.020 in. or greater, check for excessive wheel bearing play or tone ring runout. Proper wheel speed sensor installation is critical to proper ABS operation. See Figure 10.

M-30T™ ABS MODULATOR-VALVES

The M-30T™ Bendix® trailer ABS modulator-valve is controlled by the EC-30T™ controller to modify driver applied air pressure to the service brakes during ABS activation. The ABS modulator-valve is an electro-pneumatic control valve and is the last valve that air passes through on the way to the brake chambers. The hold and exhaust solenoids of the M-30T™ modulator-valve are activated to precisely modify the brake pressure on command. The EC-30T™ controller is designed to control one or two modulator-valve assemblies. See the MC-30™ controller’s electrical system schematic for ABS modulator connector pin locations, Figure 16.

The M-30T™ modulator-valve is available in two mounting conﬁ gurations.

AUXILIARY I/O

Auxiliary Function Inputs

The MC-30™ controller offers ﬁ ve auxiliary ground switch inputs. These inputs can be configured for various custom functions using a diagnostic tool. See the MC-30™ controller’s system electrical schematic for auxiliary function input connector pin locations, Figure 16.

Auxiliary Function Outputs

The MC-30™ controller offers two auxiliary output drivers. These outputs can be configured for various custom functions. Pin F1 of the 30-pin connector is the auxiliary low side output. Pin K2 of the 30-pin connector is the auxiliary high side output.

MC-30™ CONTROLLER POWER-UP SEQUENCE

At power-up, the MC-30™ controller performs a series of self-checks that can assist a technician in determining the status and conﬁ guration of the system.

Trailer ABS Indicator lamp

At power-up without detected faults, the trailer ABS indicator lamp will illuminate for 2.5 seconds as a bulb check and then turn off.

If a PLC tractor and PLC trailer are powered at the same time, the MC-30

™

controller will also trigger a bulb check

on the tractor dash using PLC.

Diagnostic LED Display of Conﬁ guration

At power-up, the diagnostic LEDs all illuminate, then display the current conﬁ guration for sensors, modulators and ABS control. See chart 3. After displaying the conﬁ guration, only the green VL T LED will stay on. However, if a fault is detected, the faulted component will be displayed by the red diagnostic LEDs.

MC-30™ Controller – LED Power-Up Sequence

At power-up All LEDs

1st blink displays number of wheel speed sensors 2 Sensors SEN-FRT 4 Sensors SEN-RER-FRT 2nd blink displays modulator conﬁ guration 1 Modulator (Dolly-Axle control) MOD 1 Modulator (Axle control) MOD-FRT 2 Modulators (Axle control) MOD-RER-FRT 2 Modulators (Side control) MOD-LFT-RHT Normal Operation No Faults VLT (green) LED illuminated only

CHART 3 - LED POWER-UP SEQUENCE

Modulator Chuff Test at Power-Up

At power-up, the MC-30™ controller activates a modulator chuff test. This electrical and pneumatic ABS modulator test can assist the technician in verifying that the modulator wiring and installation are correct. With brake pressure applied, a properly installed modulator will cause ﬁ ve rapid audible chuffs of air pressure. If two modulators are installed, the MC-30™ controller activates 5 chuffs at Modulator 1 (MOD 1) then Modulator 2 (MOD2). The chuff sequence is then repeated.

If the modulator is wired incorrectly , the modulator will only produce one chuff, or no chuff at all. If an issue is detected during the modulator chuff test, compare the modulator wiring and plumbing to the MC-30™ controller’s electrical system schematic and make repairs. See Figures 16 and

17.

System

Conﬁ guration 2 4 1 2 ABS Control Settings 2S/1M X X Axle or Dolly-Axle

2S/2M X X Axle or Side 4S/2M X X Axle or Side

CHART 4 - MC-30™ CONTROLLER ABS CONFIGURATIONS

Sensors Modulators

Available

ABS OPERATION

The MC-30™ controller uses wheel speed sensors, ABS modulator-valves and an ECU to control trailer wheels by axle or by side. By detecting excessive wheel slip during braking and adjusting the pressure to each brake chamber, the MC-30 tire and the road surface. The EC-30T™ controller controls the ABS modulator-valves, similar to a driver pumping the brakes. However, the MC-30™ controller is able to pump the brakes on the vehicle with greater speed and accuracy.

Axle Control

MC-30™ controller axle control will utilize a single ABS modulator-valve to control wheels from both sides of a given axle or axles. In the case of an unbalanced braking surface, axle control will control the high coefﬁ cient wheel just under the lock limit. Temporary periods of wheel lock are permitted on the low coefﬁ cient wheel. Axle control should not be used on 5th wheel dollies or steerable axles. When braking on even surfaces, an axle-control system will perform similar to a side control, two modulator system. Axle control is available in 2S/1M, 2S/2M and 4S/2M installations.

Dolly-Axle Control (Select Low)

MC-30™ controller dolly-axle control will utilize a single ABS modulator-valve to control wheels from both sides of a given axle or axles. In the case of an unbalanced braking surface, dolly-axle control will control the low coefﬁ cient wheel just under the lock limit. Optimal vehicle stability is achieved by not allowing the high coefﬁ cient wheel to sustain wheel lock. When braking on even surfaces, a dolly axle control system will perform similar to side control or axle control system. Dolly axle control is only available in 2S/1M installations.

Steer Axle Option (MOD2 Select Low)

This option causes MOD2 to be Dolly-Axle controlled and is only active while conﬁ gured for 4S/2M Axle control. This conﬁ guration option should be set when MOD2 is installed on a forward or steer axle of a full trailer. Steer Axle option can be set using a diagnostic tool or by purchasing an MC-30™ controller unit with this option pre-set.

Side Control

The MC-30™ controller will utilize a single ABS modulatorvalve to control one or more wheels on a given vehicle side. In the case of an unbalanced braking surface, MC-30™ controller side control will individually control each side just under the lock limit. Side control is available in 2S/2M and 4S/2M installations.

™

controller is able to optimize slip between the

Normal Braking

During normal braking, the MC-30™ controller functions as a standard relay valve. As brakes are applied or released by the driver, the control signal from the tractor foot valve causes the M-30T™ modulator-valve to apply proportional pressure to the trailer brake chambers.

SELF-CONFIGURATION / CONTROL TOGGLE

When activated with a magnet or diagnostic tool, the self-conﬁ guration feature allows for wheel speed sensor, modulator and ABS control settings to be altered. This is generally performed after replacement of an MC-30™ controller. See chart 5.

CAUTION: An incorrect ABS conﬁ guration may cause a fault indication or degraded ABS performance. All

™

MC-30

controller’s service replacement parts are initially defaulted to 4S/2M side control and may need to be reconﬁ gured upon installation. Before and after activating a self-configuration, always determine the current ABS configuration by monitoring the diagnostic LEDs at power-up or by activating blink code diagnostics.

Wheel Speed Sensors

The MC-30™ controller will self-conﬁ gure for either two or four wheel speed sensors. If either rear (RER) wheel speed sensors are detected, four wheel speed sensors will be selected. If neither rear wheel speed sensors are detected, the MC-30™ controller will conﬁ gure for two wheel speed sensors. The MC-30™ controller will default to two ABS modulators for any four sensor conﬁ guration.

When conﬁ gured for two wheel speed sensors, Right Front (RHT FRT) and Left Front (LFT FR T) wheel speed sensor inputs must be used, even if the wheel speed sensors are not physically located on the front axle.

Modulators

The EC-30T™ controller will self-conﬁ gure for either one or two modulators. The EC-30T™ controller will automatically conﬁ gure for two ABS modulators if it detects Modulator 2 (MOD2) and/or either of the rear wheel speed sensors. If MOD2 is not detected and no rear wheel speed sensors are detected, the EC-30T™ controller will conﬁ gure for a single ABS modulator.

When conﬁ gured for a single modulator, Modulator 1 (MOD

1) must be used.

Self-Conﬁ guration Procedure

Verify that the ECU, wheel speed sensor and ABS modulator connectors are in place and then power the MC-30™ controller.

Determine the current ABS conﬁ guration by monitoring the diagnostic LEDs at power-up or by activating blink code diagnostics.

Hold a magnet on the reset location of the diagnostic display. All of the LEDs will be on while the magnet is held in place.

After holding the magnet in place for 20 seconds, the

™

LEDs will begin to roll and the MC-30

controller will selfconﬁ gure for the number of detected wheel speed sensors and modulators. If it is not desired to toggle the ABS control, remove the magnet.

The MC-30™ controller will then automatically go through the power-up sequence and display the new conﬁ guration on the diagnostic LEDs. Verify the new ABS conﬁ guration by monitoring the diagnostic LEDs at power-up or by activating blink code diagnostics.

If an erroneous sensor or modulator combination is detected during the self-conﬁ guration, fault codes are activated when the MC-30™ controller returns to normal operating mode.

ABS Control Toggle Procedure

T o also toggle the ABS control, continue to hold the magnet in place while the LEDs are rolling, for an additional 20 seconds (total of 40 seconds). After holding the magnet in place for 40 seconds, the LEDs will begin to rapidly ﬂ ash. At this point the MC-30™ controller will toggle the ABS control conﬁ guration. Remove the magnet.

ABS Control Toggle

The MC-30™ ABS controller control setting can be toggled between Control Group A and Control Group B. When activated, the MC-30™ controller will toggle the ABS control between (axle control) and (dolly-axle control or side control). When a self-conﬁ guration occurs without an ABS

ABS

Conﬁ guration

2S/1M Axle Dolly-Axle 2S/2M Axle Side 4S/2M Axle Side

control toggle, the ABS control group does not change. See chart 6 and chart 7.

CHART 5 - SELF-CONFIGURATION AND ABS CONTROL TOGGLE ACTIVATION

CHART 6 - ABS CONFIGURATION AND CONTROL TOGGLE

Control Group A Control Group B

Toggle

Tog gle

Toggle

4S/2M Side to 2S/1M Axle

2S/1M Axle to

2S/1M Dolly-Axle

Your trailer has two wheel speed sensors and one ABS modulator that is plumbed for axle control.

The MC-30™ controller you have installed is currently conﬁ gured for 4S/2M side control.

Provide power to the MC-30™ controller and verify the current configuration using the LEDs or blink codes.

4S/2M Side

Hold magnet in place for 20 seconds. The LEDs will begin to roll as the installed sensors and modulators are detected.

Your dolly or steer axle has two wheel speed sensors and one ABS modulator that is plumbed for axle control.

The MC-30™ controller you have installed is currently conﬁ gured for 2S/1M axle control.

Provide power to the MC-30™ controller and verify the current configuration using the LEDs or blink codes.

2S/1M Axle

Hold magnet in place for 20 seconds. The LEDs will begin to roll as the installed sensors and modulators are detected.

2S/1M Dolly-Axle

With the LEDs rolling, continue to hold the magnet in place for an additional 20 seconds. (Total of 40 seconds)

The LEDs begin to ﬂ ash as the ABS control toggle activation occurs.

Remove magnet.

2S/1M Axle

Verify the new conﬁ guration using the LEDs or blink codes.

2S/1M Axle

With the LEDs rolling, continue to hold the magnet in place for an additional 20 seconds. (Total of 40 seconds)

The LEDs begin to ﬂ ash as the ABS control toggle activation occurs.

Remove magnet.

2S/1M Dolly-Axle

Verify the new conﬁ guration using the LEDs or blink codes.

CHART 7 - EXAMPLES OF SELF-CONFIGURATION AND ABS CONTROL TOGGLE (1 of 2)

4S/2M Axle to 2S/2M Axle

4S/2M Side to

2S/1M Dolly-Axle

Your trailer has two wheel speed sensors and two ABS modulators that are plumbed for axle control.

The MC-30™ controller you have installed is currently conﬁ gured for 4S/2M axle control.

Provide power to the MC-30™ controller and verify the current conﬁ guration using the LEDs or blink codes.

4S/2M Axle

Hold magnet in place for 20 seconds. The LEDs will begin to roll as the installed sensors and modulators are detected. Remove the magnet.

Your trailer has two wheel speed sensors and two ABS modulators that are plumbed for side control.

The MC-30™ controller you have installed is currently conﬁ gured for 4S/2M side control.

Provide power to the MC-30™ controller and verify the current configuration using the LEDs or blink codes.

4S/2M Side

Hold magnet in place for 20 seconds. The LEDs will begin to roll as the installed sensors and modulators are detected. Remove the magnet.

2S/2M Axle

Stop! You do not need to perform an ABS control toggle in this case.

Verify the new conﬁ guration using the LEDs or blink codes.

CHART 7 - EXAMPLES OF SELF-CONFIGURATION AND ABS CONTROL TOGGLE (2 of 2)

2S/1M Dolly-Axle

Stop! You do not need to perform an ABS control toggle in this case.

Verify the new conﬁ guration using the LEDs or blink codes.

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