68 - Pump Motor Stalled

Symptom List:
PUMP MOTOR CIRCUIT OPEN - 67
PUMP MOTOR STALLED - 68

Test 1-5:

Test 6-10:

Test 11:

Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be PUMP MOTOR CIRCUIT OPEN - 67.

PUMP MOTOR CIRCUIT OPEN - 67

When Monitored:
Ignition on.

Set Condition:
Ignition on for at least 3.5 seconds. ABS pump motor command never given during the current ABS command. Low feedback voltage from the low side of the motor.

PUMP MOTOR STALLED - 68

When Monitored:
Ignition on.

Set Condition:
When vehicle speed is above 15 mph without ABS active. Vehicle speed above 4 mph with a fault from the previous ignition cycle. ABS pump motor command given and then turned off. High feedback voltage from the low side of the motor continuously.

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 OPEN - 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