Fault Code Guide

Troubleshooting Tables
Using the following tables, troubleshoot the ABS sys-
tem by MID-SID.
J1587 Fault Code Cross-Reference
MID-SID Description
Troubleshooting
Table
Wheel Sensor
136-001
136-002
136-003
136-004
Left Front
Right Front
Left Rear
Right Rear
Table 2
Table 3
Table 4
Table 5
Modulator Valve
136-007
136-008
136-009
136-010
Left Front
Right Front
Left Rear
Right Rear
Table 6
Table 7
Table 8
Table 9
J1587 Fault Code Cross-Reference
MID-SID Description
Troubleshooting
Table
136-014
136-015
Ground Faults Table 10
Table 11
136-018 ATC Valve (if equipped) Table 12
136-019 Auxiliary Output Table 13
136-023 ABS Warning Lamp See Subject 310
136-231 J1939 Datalink Table 14
136-251 Voltage Table 15
136-253 Configuration Errors Table 16
136-254 Miscellaneous Faults Table 17
Table 1, J1587 Fault Code Cross Reference
Left Front Wheel Sensor Troubleshooting (SID 001)
MID SID FMI Problem Test Test Result Action
136 001 01 Incorrect sensor
air gap
1. Adjust the sensor.
Check the AC voltage
across pins 7 and 8 of the
black X2 ECU connector
while rotating the LF wheel
30 rpm.
Voltage is 0.2 Vac
or greater
Sensor adjustment solved the
problem.
Voltage is less
than 0.2 Vac
Check for excessive wheel
bearing end play and hub runout.
Repair as needed.
136 001 02 Incorrect tire size Check for correct tire size and
mixed tire sizes. Check for correct
number of teeth on tone wheel.
Correct as needed.
136 001 03 Sensor shorted to
power
2. Measure the voltage
across pins 7 of the X2
(black) connector and a
good chassis ground.
Repeat the test between
pin 8 and ground.
Measurable
voltage at either
pin
Repair short to power in circuit(s)
377LF+ and 377LF– in chassis
harness and sensor cable.
If problem is in the sensor
harness, replace the sensor.
No voltage at
either pin
Repeat the test and check for
intermittent short to power in
circuits 377LF+ and 377LF–.
Suspect ECU is at fault if the
problem persists.
Meritor WABCO Pneumatic Antilock Braking System
(ABS)
42.00
ABS System Troubleshooting
Business Class M2 Workshop Manual, Supplement 2, June 2002 300/1