Fault Code Guide

J1587 Fault 136-044 Left Rear Inlet Solenoid Valve
MID SID FMI Problem Test Test Result Action
136 044
03
05
06
Shorted to power (inlet
valve)
Open circuit (inlet valve)
Shorted to ground (inlet
valve)
NOTE: Check for an open
circuit in the wiring
between the ECU and the
modulator valve. Check the
ground circuit to the
modulator valve.
1. Measure the resistance
across Pins 5 and 2 of the
gray X1 ECU connector
(Circuits 378LRI and
GRDE).
Resistance
reading 6.5±0.5
ohms
Check for intermittent
wiring connections. If the
wiring is OK, suspect the
ECU is at fault.
Resistance
reading not
6.5±0.5 ohms
Go to Test 2.
2. Check the ground circuit
by measuring the
resistance between Pin 2
of the gray X1 ECU
connector and a good
chassis ground.
Resistance
reading close to
zero
Go to Test 3.
Resistance
reading not
close to zero
Check and repair the
ground circuit.
3. With the modulator valve
connector removed,
measure the resistance
between Pin 8 on the
modulator connector and a
good chassis ground.
Resistance
reading close to
zero
Go to Test 4.
Resistance
reading not
close to zero
Check the modulator
ground circuit, repair as
necessary.
4. Measure the resistance
in Circuit 378LRI between
modulator connector Pin 2
and connector Pin 5 on the
gray X1 ECU connector.
Resistance
reading close to
zero
Go to Test 5.
Resistance
reading not
close to zero
Repair Circuit 378LRI.
5. With the modulator valve
connector removed,
measure the resistance
across Pins 2 and 8 on the
modulator connector.
Resistance
reading 6.5±0.5
ohms
Repeat Tests 1 through 5.
The problem may be
intermittent. If the wiring is
OK, suspect the ECU is at
fault.
Resistance
reading not
6.5±0.5 ohms
Replace the modulator
valve.
Table 14, J1587 Fault 136-044 Left Rear Inlet Solenoid Valve
Meritor WABCO Hydraulic Antilock Braking System (ABS) 42.26
Troubleshooting
Business Class M2 Workshop Manual, Supplement 4, March 2003300/20