Fault Code Guide

J1587 Fault 136-013 Retarder
MID SID FMI Problem Test Test Result Action
136 013 03 Short to power
1. Disconnect the black X2
connector at the ECU.
Disconnect the retarder
relay. With the ignition ON,
measure the voltage
between Pin 7 of the black
X2 ECU connector and a
good chassis ground.
Voltage zero
Check for an intermittent
short to power in Circuit
376R. If okay, ECU may
be at fault.
Voltage not zero
Check for a short to power
in Circuit 376R. Repair as
necessary.
136 013 05 Open circuit
2. Disconnect the black X2
connector at the ECU.
Disconnect the retarder
relay. Measure the
resistance between Pin 7
of the black X2 ECU
connector and relay
connector cavity that
corresponds to pin 85 of
the relay.
Resistance less
than 1 ohm
Check relay coil resistance
(should be 60-85 Ohms). If
okay, check circuit 81C
(power to relay coil) for
open. Repair as
necessary.
Resistance more
than 1 ohm
Repair open in circuit
376R.
136 013 06 Short to ground
3. Disconnect the black X2
connector at the ECU.
Disconnect the retarder
relay. Measure the
resistance between pin 7
of the X2 connector and a
good chassis ground.
Resistance is
less than 10
Ohms
Check circuit 376R for
short to ground. Repair as
necessary.
Resistance is
much greater
than 10 Ohms
Check for intermittent short
to ground in circuit 376R.
If okay, ECU may be at
fault.
Table 8, J1587 Fault 136-013 Retarder
J1587 Fault 136-014 Power
MID SID FMI Problem Test Test Result Action
136 014 03
Voltage supplied to ECU
with ignition OFF
1. Check for voltage
backfeeding to ECU with
the ignition off, especially
to pins 7/X2 and 10/X2.
Voltage zero Repair as necessary.
136 014 04
No voltage supplied to
ECU with ignition ON
2. With the ignition ON,
measure the voltage
between Pin 3 of the black
X2 ECU connector and a
good chassis ground.
Repeat between pin 11
and ground.
Voltage between
9.5 and 14 volts
at both pins.
Check Circuit 376A for an
intermittent open circuit. If
the problem persists,
suspect the ECU is at
fault.
Voltage below
9.5 volts at one
or both pins.
Check Circuit 376A for an
open circuit and check
Fuse F16. Repair as
necessary.
Table 9, J1587 Fault 136-014 Power
Meritor WABCO Hydraulic Antilock Braking System (ABS) 42.26
Troubleshooting
Business Class M2 Workshop Manual, Supplement 4, March 2003 300/15