Fault Code Guide

Ground Faults Troubleshooting (SID 015)
MID SID FMI Problem Test Test Result Action
136 015 07 Internal relay fault If fault repeats, replace the ABS
ECU.
Table 11, Ground Faults Troubleshooting (SID 015)
ATC Valve Troubleshooting (SID 018)
MID SID FMI Problem Test Test Result Action
136 018 03 Short to power. 1. Disconnect the X3
(green) connector from the
ABS ECU. Disconnect the
ATC valve connector.
Measure the voltage
between pin 5 of the X3
(green) connector and a
good chassis harness.
Voltage Circuit 378T+ is shorted to power.
Repair as necessary.
No voltage Check circuit 378+ for intermittent
short to power. Repair as
necessary. If fault persists,
suspect ECU at fault.
136 018 05 Open circuit 2. Disconnect the ATC
Valve connector. Measure
the resistance across the
two pins of the ATC valve.
NOTE If the vehicle does
not have an ATC valve,
reconfigure the ECU.
Resistance is 7 to
14 ohms.
Go to step 3.
Resistance is not 7
to 14 ohms.
Replace ATC Valve.
3. Reconnect the ATC
valve connector. Measure
the resistance across pins
5 and 6 of the X3
connector.
Resistance is 7 to
14 ohms.
Verify fault. Check for intermittent
open circuit in 376T+ and 376 T-.
Repair as necessary.
Resistance is not 7
to 14 ohms.
Repair circuit 376T+ or 376T-.
136 018 07 Short to ground. 4. Disconnect the X3
(green) connector, check
resistance between pin 6
and a good ground.
Continuity Circuit 376T+ is shorted to
ground. Repair as necessary.
No continuity Verify fault. Check circuit 376T+
for intermittent short to ground.
Repair as necessary.
Table 12, ATC Valve Troubleshooting (SID 018)
Meritor WABCO Pneumatic Antilock Braking System
(ABS)
42.00
ABS System Troubleshooting
Business Class M2 Workshop Manual, Supplement 2, June 2002 300/13