Fault Code Guide

Left Front Wheel Sensor Troubleshooting (SID 001)
MID SID FMI Problem Test Test Result Action
136 001 04 Short to ground 3. Measure the resistance
between pin 7 of the X2
(black) connector and a
good chassis ground.
Repeat the test between
pin 8 and ground.
Resistance
between either pin
and ground is less
than 100,000 ohms
Repair the short to ground in
circuit(s) 377LF+ and 377LF– in
chassis harness or sensor cable.
If problem is in sensor harness,
replace the sensor.
Resistance
between either pin
and ground is
greater than
100,000 ohms
Repeat the test for intermittent
short to ground in circuits 377LF+
and 377LF–.
Suspect ECU is at fault if the
problem persists.
136 001 05 Open circuit 4. Measure the resistance
between pins 7u and 8 of
the X2 (black) connector.
Resistance is 900–
2000 ohms
Repeat the test and check for
intermittent open or short in
circuits 377LF+ and 377LF–.
Suspect ECU at fault if the
problem persists.
Resistance is
greater than 2000
ohms OR less than
900 ohm.
Perform test 5.
136 001 05 Open circuit 5. Disconnect the sensor
connector from the chassis
harness. Measure the
resistance between the
pins on the sensor
connector.
Resistance is 900–
2000 ohms
Repair open or short in circuit(s)
377LF+ and 377LF– in chassis
harness.
Resistance is
greater than 2000
ohms OR less than
900 ohms
Replace the sensor.
136 001 06 Short circuit Perform tests 4 and 5.
136 001 07 Damaged tone
ring
Inspect tone ring for damage and
missing teeth. Make sure correct
tooth wheel is installed (100-tooth
is normal application). Repair as
needed.
136 001 08 Excessive wheel
slip
Check sensor adjustment. This
fault usually occurs when there is
excessive tire spin for more than
16 seconds.
136 001 09 Wire mismatch 6. Check for mixed sensor
connection. Using Meritor
PC Diagnostics, spin each
wheel individually. Check
that output is from the
correct sensor.
Correct wiring connections, as
needed.
Meritor WABCO Pneumatic Antilock Braking System
(ABS)
42.00
ABS System Troubleshooting
Business Class M2 Workshop Manual, Supplement 2, June 2002300/2