Pump Motor Not Working Properly

Symptom:
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.

Test 1-2:

Test 3-6:

Test 7-10:

Test 11-13:

POSSIBLE CAUSES
- 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