Pump Motor Not Working Properly - Jeep Wrangler TJ 2003 Service Manual

Symptom:

PUMP MOTOR NOT WORKING PROPERLY

When Monitored and Set Condition:
PUMP MOTOR NOT WORKING PROPERLY
When Monitored: Ignition on. The CAB commands the pump on at 20 km/h (12 mph) to
check its operation, if the brake switch is not applied. If the driver has their foot on the
brake, the test will run at 40 km/h (25 mph). The CAB monitors pump voltage
continuously.
Set Condition: The DTC is stored when the CAB detects: 1) Improper voltage decay after
the pump was turned off. 2) Pump not energized by the CAB, but voltage is present for 3.5
seconds. 3) Pump is turned on by the CAB, but their is insufficient voltage to operate it.
ABS PUMP MOTOR INTERMITTENT DTC
FUSED B(+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND
FUSED B(+) CIRCUIT SHORTED TO GROUND
CAB - FUSED B(+) CIRCUIT SHORTED TO GROUND
FUSE BLOWN - PUMP MOTOR CIRCUIT
NO B+ SUPPLY TO FUSE
ABS PUMP MOTOR INOPERATIVE
FUSED B(+) CIRCUIT OPEN
GROUND CIRCUIT OPEN
GROUND CIRCUIT HIGH RESISTANCE
CAB - INTERNAL FAULT
TEST
1 Turn the ignition on.
With the DRBIII , read DTC's.
With the DRBIII , erase DTC's.
Turn the ignition off.
Turn the ignition on.
With the DRBIII , actuate the ABS pump motor.
Did the Pump Motor operate when actuated?
→ Go To 2
No
Yes → Go To 13
2 Turn the ignition off.
Remove and inspect the ABS Pump fuse in the PDC.
Is the Fuse blown?
Yes → Go To 3
→ Go To 7
No
POSSIBLE CAUSES
ACTION
25
BRAKES (CAB)
APPLICABILITY
All
All