C1243

DTC C1243 BPMV Pump Motor Stalled:

BPMV Pump Motor Circuit Schematic:

CIRCUIT DESCRIPTION
When the pump motor relay is grounded by the EBCM/EBTCM, it closes and provides battery voltage to operate the pump.

CONDITION FOR SETTING THE DTC
- DTC C1243 can be set when the pump motor relay has been commanded "OFF" after the pump motor has been " ON. " A malfunction has occurred if the pump motor was "ON", and the EBCM/EBTCM sensed a stuck or slowly turning pump motor.

ACTION TAKEN WHEN THE DTC SETS
- A malfunction DTC is stored, ABS/TCS is disabled and the "ABS" and "TRACTION OFF" indicator lamps are turned "ON."

CONDITIONS FOR CLEARING DTC
- Condition for DTC is no longer present and scan tool clear DTC function is used.
- 50 ignition cycles have passed with no DTC(s) detected.

DIAGNOSTIC AIDS
- It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
- An intermittent malfunction can be caused by poor connections, broken insulation, or a wire that is broken inside the insulation.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
3. Checks for good pump motor ground.
5. Checks for good pump motor ground through the BPMV.