C1242

CIRCUIT DESCRIPTION
The pump motor is an integral part of the Brake Pressure Modulator Valve (BPMV). The electronic brake control relay supplies power to the solenoid valves and pump motor. The electronic brake control relay, located in the EBCM/EBTCM, is activated whenever the ignition switch is in the RUN position and no faults are present. The electronic brake control relay remains engaged until the ignition switch is turned off or a failure is detected.

CONDITIONS FOR SETTING THE DTC
DTC C1242 will set anytime the system voltage is greater than 8 volts and the pump motor is commanded off. A DTC exists if the voltage across the pump motor is between 3.3 and 5.2 volts for 2.0 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored.
^ ABS/TCS is disabled.
^ ABS/TCS indicators are turned on.

CONDITIONS FOR CLEARING THE DTC
^ Condition for DTC is no longer present and scan tool clear DTC function is used.
^ 100 ignition cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
^ Possible causes for DTC C1242 to set are:
- The pump motor internals has a open.
- The pump motor circuit is open.

^ The pump motor is part of Brake Pressure Modulator Valve (BPMV) and is not serviceable separately.
^ The solenoid valve control relay is integral to the EBCM/EBTCM and is not serviceable separately.
^ 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.
^ If an intermittent malfunction exists refer to Intermittents and Poor Connections Diagnosis in Diagnostic Aids.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
2. Checks for good pump motor ground.