Chrysler PT Cruiser 2001 Service Manual Supplement page 1992

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 25 km/h (15 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 every 7
milliseconds.
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.
FUSE BLOWN - PUMP MOTOR CIRCUIT
GROUND CIRCUIT POOR CONNECTION
FUSED B(+) CIRCUIT OPEN
CAB - FUSED B(+) CIRCUIT OPEN
ABS PUMP MOTOR DOES NOT ROTATE
CAB - FUSED B(+) CIRCUIT SHORTED TO GROUND
FUSED B(+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND
FUSED B(+) CIRCUIT SHORTED TO GROUND
CAB - PUMP MOTOR RUNNING CONTINUOUSLY
TEST
1 Turn ignition on.
With the DRBIII , read DTC's.
Is the CAB Power Feed Circuit DTC present now?
Yes → Refer to symptom CAB POWER FEED CIRCUIT in the BRAKES
→ Go To 2
No
2 Turn ignition on.
With the DRBIII read DTC's.
With the DRBIII erase DTC's.
Turn ignition off.
Turn ignition on.
With the DRBIII actuate the pump motor.
Did the Pump Motor operate as commanded by the DRBIII ?
→ Go To 3
No
Yes → Go To 13
POSSIBLE CAUSES
ACTION
(CAB) category.
35
BRAKES (CAB)
APPLICABILITY
All
All