ABS - Integrated Chassis Control

DTC C1242: BPMV Pump Motor Circuit Open:

DTC C1242 Schematic:

CIRCUIT DESCRIPTION
The BPMV pump motor ground is supplied through a ground stud on the pump motor to a good ground.

CONDITION FOR SETTING THE DTC
DTC C1242 can be set when the pump relay is commanded OFF. A malfunction exists if the pump motor ground CKT 350 resistance is greater than 6900 ohms.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS/TCS/ICCS is disabled and the ABS and TRACTION CONTROL indicator lamps are turned ON. Vehicles with ICCS2 will display the STABILITY REDUCED message on the DIC.

CONDITIONS FOR CLEARING THE DTC
Condition for DTC is no longer present and scan tool clear DTC function is used. Fifty start cycles have passed with no DTCs 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.
2. Checks for good pump motor ground.
4. Checks for good pump motor ground through the BPMV.