Bendix MC-30 User Manual

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Bendix MC-30 User Manual

 

SD-13-4834

Bendix® MC-30 Trailer ABS Controller Assembly

 

LED Diagnostic

30-Pin

Connector

Display

 

 

ABS Modulator

 

 

Connector

Control

 

(MOD1)

Port

 

 

1/4" NPT

Delivery Ports

Supply Port

 

1/2" NPT

 

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-Configuration/Control Toggle . . . . . . . . . .

. .8

Other Configurable 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

FIGURE 1 - MC-30 CONTROLLER TANK (NIPPLE) MOUNT ASSEMBLY

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.

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

1

 

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 filled 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 ASSEMBLY

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. Atank 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 trailerABS indicator lamp. Trailers built after this date will transmit the status of the trailerABS 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 controller 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 identified 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.

2

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.

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.

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.

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 configurations, 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.

3

Auxiliary I/O Connector

An optional auxiliary connector provides a connection to the MC-30 controller auxiliary feature I/O pins. The five auxiliary ground-switch inputs and two auxiliary outputs can be activated and configured 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.

30-Pin ECU

ECU Connector Jackscrew Connector

(Tighten to 15-20 in. lbs.)

3-Pin Modulator 2

(MOD2)

8-Pin Auxiliary

 

 

 

 

(AUX)

4-Pin Diagnostic

 

 

 

 

 

 

Left Rear

3-Pin Modulator 1

(DIAG)

 

 

 

 

 

(LFT RER)

(MOD 1)

 

 

 

Right Rear

 

 

Right Front

Left Front

(RHT RER)

5-Pin Power and

 

(LFT FRT)

 

 

(RHT FRT)

 

2-Pin Wheel

Indicator Lamp

 

 

 

 

 

 

Speed Sensors

(PWR/WL)

 

 

 

 

 

 

 

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

Pigtail

2

 

To

To Diagnostic

(MOD2)

 

Pigtail

Tool

 

 

 

FIGURE 6 - REMOTE MODULATOR HARNESS (MOD2)

FIGURE 7 - REMOTE DIAGNOSTIC HARNESS

4

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)

 

 

 

 

 

 

 

 

 

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 configured to receive wheel speed information from 100 tooth tone rings by default. Vehicle axle and ABS control configurations 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.

Previous Bendix Wheel Speed Sensors

Previous sensors are all replaced by the Bendix WS-24 wheel speed sensor shown below.

90° Speed

Sensors

Straight Speed

Sensors

 

WS-24

Previous

sensors use

clamping

clamping

sleeves with

sleeves have

“BX” in a

“BW” in a

swoosh

diamond

symbol

 

PREVIOUS AND NEW CLAMPING SLEEVES

FIGURE 8 - BENDIX WHEEL SPEED SENSORS

Wheel Speed Sensor Clips

The sensor spring clip is designed to firmly 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

5

FIGURE 11 - M-30T TANK (NIPPLE) MOUNT

MODULATOR-VALVE

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 duringABS 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 configurations.

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, configuration, 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.

AUXILIARY I/O

Auxiliary Function Inputs

The MC-30 controller offers five 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 configuration 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.

6

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 Configuration

At power-up, the diagnostic LEDs all illuminate, then display the current configuration for sensors, modulators and ABS control. See chart 3. After displaying the configuration, only the green VLT 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 configuration

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 five 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

Sensors

Modulators

Available

Configuration

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

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 controller is able to optimize slip between the 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 coefficient wheel just under the lock limit. Temporary periods of wheel lock are permitted on the low coefficient 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 coefficient wheel just under the lock limit. Optimal vehicle stability is achieved by not allowing the high coefficient 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 configured for 4S/2M Axle control. This configuration 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.

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.

7

SELF-CONFIGURATION / CONTROL TOGGLE

When activated with a magnet or diagnostic tool, the self-configuration 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 configuration 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 reconfigured 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-configure 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 configure for two wheel speed sensors. The MC-30 controller will default to two ABS modulators for any four sensor configuration.

When configured for two wheel speed sensors, Right Front (RHT FRT) and Left Front (LFT FRT) 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-configure for either one or two modulators. The EC-30T controller will automatically configure 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 configure for a single ABS modulator.

When configured for a single modulator, Modulator 1 (MOD 1) must be used.

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-configuration occurs without an ABS control toggle, the ABS control group does not change. See chart 6 and chart 7.

Self-Configuration 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 configuration 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 selfconfigure 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 configuration on the diagnostic LEDs. Verify the new ABS configuration 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-configuration, fault codes are activated when the MC-30 controller returns to normal operating mode.

ABS Control Toggle Procedure

To 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 flash. At this point the MC-30 controller will toggle the ABS control configuration. Remove the magnet.

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

ABS

Control Group A

 

Control Group B

Configuration

 

2S/1M

Axle

Toggle

Dolly-Axle

 

 

 

 

2S/2M

Axle

Toggle

Side

 

 

 

 

4S/2M

Axle

Toggle

Side

 

 

 

 

CHART 6 - ABS CONFIGURATION AND CONTROL TOGGLE

CHART 5 - SELF-CONFIGURATION AND ABS CONTROL TOGGLE ACTIVATION

8

4S/2M Side to 2S/1M 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 configured 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.

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 flash as the ABS control toggle activation occurs.

Remove magnet.

2S/1M Axle to 2S/1M Dolly-Axle

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 configured 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 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 flash as the ABS control toggle activation occurs.

Remove magnet.

2S/1M Axle

2S/1M Dolly-Axle

Verify the new configuration using the LEDs or blink codes.

Verify the new configuration using the LEDs or blink codes.

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

9

4S/2M Axle to 2S/2M 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 configured for 4S/2M axle control.

Provide power to the MC-30 controller and verify the current configuration 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.

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

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 configured 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 configuration using the LEDs or blink codes.

2S/1M Dolly-Axle

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

Verify the new configuration using the LEDs or blink codes.

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

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