C1243

Circuit Description
The pump motor is grounded through the ground stud on the BPMV. The EBCM controls the pump motor by energizing the pump motor relay. The pump motor relay then supplies voltage to the pump motor. The pump serves 2 purposes:
- Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events.
- Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events.

Condition for Running the DTC
After the pump motor has been ON, the pump motor relay is commanded OFF.

Condition for Setting the DTC
The pump motor is stalled or turning slowly.

Action Taken When the DTC Sets
If equipped, the following actions occur:
- The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
- The ABS indicator turns ON.
- The TRACTION CONTROL indicator turns ON.
- The DIC displays the SERVICE STABILITY SYS message.

Conditions for Clearing the DTC
- The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
- The condition for the DTC is no longer present (the DTC is not current) and you used the On-Board Diagnostics Clear DTC function.
- The EBCM automatically clears the history DTC when a current DTC is not detected in 50 consecutive drive cycles.

Diagnostic Aids
The pump motor is integral to the BPMV. The pump motor is not serviceable.

Test Description
The numbers below refer to step numbers on the diagnostic table.
2. This step tests the pump motor ground.
4. This step tests the pump motor ground through the BPMV.