Pump Motor Not Working Properly

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/in (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/in (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.

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