1stDigit
1
2
3
4
5
6
7
7777788
8
8
8
8
2ndDigit
1
1-6*
1-6*
1-6*
1-6*
1-6*
1
2345612
3
4
5
6
TROUBLESHOOTING AND REPAIR
Verify all ECU connectors are in place. Verify accuracy of blink
code and clear from ECU memory. If code does not clear, it may be
necessary to reconfigure or replace the ECU.
Verify accuracy of blink code and clear from ECU memory.
Check vehicle voltage (9.5-14.0 volts). Verify accuracy of blink
code and clear from ECU memory.
Check for damaged tooth wheel.
Check vehicle voltage and supply to ECU (9.5-14.0 volts).
Verify correct ATC set-up. Reconfigure if required.
Check ABS indicator lamp connections. Verify blink code switch
was activated longer than 16 seconds.
Check retarder (third brake) connections.
Check ATC valve, valve cables and connectors. Verify 7.0-14.0
ohms resistance.
Check for correct data link connection: J1922 and J1939 (D
version) or J1939 (E version). Verify correct sensor
adjustment.
Check sensor, sensor cable and connectors. Verify 900-2000 ohms
resistance.Check for tire size mismatch or tooth wheel difference.
Check sensor, sensor cable and connector for intermittent
contact.
Adjust wheel sensor to touch tooth wheel. Check sensor gap.
Check for loose wheel bearings or excessive hub runout. Verify
minimum 0.2 volts AC output @ 30 RPM.
Check ABS modulator valve, valve cable and connectors. Verify
4.0-9.0 ohms resistance (ABS modulator valve).
System O.K.
D Version: Full function, cab-mounted only. Check all ABS valve
ground connections for diagonals 1 and 2 (open, shorted to ground
or shorted to battery).E Version: Check all ABS ECU and ATC valve
grounds.
E Version: Verify accuracy of blink code and clear from ECU
memory. Contact ArvinMeritors Customer Service Center at
800-535-5560.
Verify accuracy of blink code and clear from ECU memory. E
Version: Check RSC valve. Verify 7.0-14.0 ohms resistance.
D and E Version ABS (12 volt)Blink Code Identification Guide
800-535-5560
Meritor WABCO Vehicle Control Systems2135 West Maple RoadTroy,
MI 48084-7121 USA800-535-5560meritorwabco.com
TP-0186(Replaces TP-96182)
Revised 04-05Printed in the USA
For further information, refer to Maintenance Manual 30 (D
Version ABS) orMaintenance Manual 0112 (E Version ABS) or call:
Copyright 2005Meritor WABCO
All Rights Reserved
ECU Identification
4S/4M ABS/ATC/RSC
D Version
E Version
Cab-Mounted ECU Frame-Mounted ECUBasic ECU
Basic ECU Frame-Mounted ECUUniversal ECU
System Configuration Layout
1 Right front steer axle (curb side)2 Left front steer axle
(drivers side)3 Right forward/rear tandem drive axle (curb
side)
* 1-6 Key4 Left forward/rear tandem drive axle (drivers side)5
Right rear/rear tandem drive axle (curb side)6 Left rear/rear
tandem drive axle (drivers side)
INSTRUCTIONS
1. Hold 1 Second.Light is ON.
Pause 1.5 Seconds
2. Count Flashes for 1st Digit (1-8).
4. Match Blink Code left. Read Troubleshooting and Repair.
Pause 1.5 Seconds
Pause 4 SecondsRepeat Code
3. Count Flashesfor 2nd Digit (1-6).
VALVE PACKAGE INSTALLATION (REAR)
VALVE PACKAGEINSTALLATION (FRONT)
AIR LINES
ELECTRICAL LINES
LAMPS
TRACTORPROTECTION
VALVE
RSC VALVE
ATC VALVE
1stDigit
1
2
3
4
5
6
7
7777788
8
8
8
8
2ndDigit
1
1-6*
1-6*
1-6*
1-6*
1-6*
1
2345612
3
4
5
6
TROUBLESHOOTING AND REPAIR
Verify all ECU connectors are in place. Verify accuracy of blink
code and clear from ECU memory. If code does not clear, it may be
necessary to reconfigure or replace the ECU.
Verify accuracy of blink code and clear from ECU memory.
Check vehicle voltage (9.5-14.0 volts). Verify accuracy of blink
code and clear from ECU memory.
Verify accuracy of blink code and clear from ECU memory. Check
RSC valve. Verify 7.0-14.0 ohms resistance.
Check for damaged tooth wheel.
Check vehicle voltage and supply to ECU (9.5-14.0 volts).
Verify correct ATC set-up. Reconfigure if required.
Check ABS indicator lamp connections. Verify blink code switch
was activated longer than 16 seconds.
Check retarder (third brake) connections.
Check ATC valve, valve cables and connectors. Verify 7.0-14.0
ohms resistance.
Check for correct data link connection: J1922 and J1939 (D
version) or J1939 (E version). Verify correct sensor
adjustment.
Check sensor, sensor cable and connectors. Verify 900-2000 ohms
resistance.Check for tire size mismatch or tooth wheel difference.
Check sensor, sensor cable and connector for intermittent
contact.
Adjust wheel sensor to touch tooth wheel. Check sensor gap.
Check for loose wheel bearings or excessive hub runout. Verify
minimum 0.2 volts AC output @ 30 RPM.
Check ABS modulator valve, valve cable and connectors. Verify
4.0-9.0 ohms resistance (ABS modulator valve).
System O.K.
D Version: Full function, cab-mounted only. Check all ABS valve
ground connections for diagonals 1 and 2 (open, shorted to ground
or shorted to battery).E Version: Check all ABS ECU and ATC valve
grounds.
E Version: Verify accuracy of blink code and clear from ECU
memory. Contact ArvinMeritors Customer Service Center at
800-535-5560.
D and E Version ABSBlink Code Identification Guide
800-535-5560
Meritor WABCO Vehicle Control Systems2135 West Maple RoadTroy,
MI 48084-7121 USA800-535-5560meritorwabco.com
TP-0186(Replaces TP-96182)
Revised 04-05Printed in the USA
For further information, refer to Maintenance Manual 30 (D
Version ABS) orMaintenance Manual 0112 (E Version ABS) or call:
Copyright 2005Meritor WABCO
All Rights Reserved
ECU Identification
4S/4M ABS/ATC/RSC
D Version
E Version
(for 12-volt systems)
Cab-Mounted ECU Frame-Mounted ECUBasic ECU
Basic ECU Frame-Mounted ECUUniversal ECU
System Configuration Layout
1 Right front steer axle (curb side)2 Left front steer axle
(drivers side)3 Right forward/rear tandem drive axle (curb
side)
* 1-6 Key4 Left forward/rear tandem drive axle (drivers side)5
Right rear/rear tandem drive axle (curb side)6 Left rear/rear
tandem drive axle (drivers side)
INSTRUCTIONS
1. Hold 1 Second.Light is ON.
Pause 1.5 Seconds
2. Count Flashes for 1st Digit (1-8).
4. Match Blink Code left. Read Troubleshooting and Repair.
Pause 1.5 Seconds
Pause 4 SecondsRepeat Code
3. Count Flashesfor 2nd Digit (1-6).
VALVE PACKAGE INSTALLATION (REAR)
VALVE PACKAGEINSTALLATION (FRONT)
AIR LINES
ELECTRICAL LINES
LAMPS
TRACTORPROTECTION
VALVE
RSC VALVE
ATC VALVE
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