68 Pump Motor Stalled

NAME OF CODE:
68 Pump Motor Stalled


SET CONDITION:
The following criteria must be met for this trouble code to be detected:

1. Ignition turned on for at least 3.4 seconds.
2. Valve, power relay, and motor (ignition cycle) self-test in progress.
3. ABS power relay command given for at least 15 ms.
4. CAB pump motor command given for 500 ms and then turned off.
5. High feedback voltage from low side of motor continuously for next 100 ms.


POSSIBLE CAUSES:
- Anything that keeps motor feedback voltage high when it is expected to be driven low by back EMF across the rotor winding of the coasting motor
- Seized motor or pump
- Open CAB motor driver output
- Shorted circuit in motor winding
- Short to a high voltage point in the motor feedback to the CAB microprocessor