C1243

CIRCUIT DESCRIPTION
When the Electronic Brake Control Module/Electronic Brake Traction Control Module (EBCM/EBTCM) grounds the pump motor relay, the relay closes and provides battery voltage to operate the pump.

CONDITIONS FOR SETTING THE DTC
The pump motor relay is commanded off after the motor has been on. A malfunction 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 DTC C1243 is stored
^ The ABS/TCS is disabled
^ The ABS and the TRACTION OFF indicators are turned on

CONDITIONS FOR CLEARING THE DTC
^ The condition for the Diagnostic Trouble Code (DTC) is no longer present and the scan tool clear DTC function is used
^ 50 ignition cycles have passed with no DTCs detected

DIAGNOSTIC AIDS
^ Thoroughly inspect the wiring and the connectors. Failure to carefully and fully inspect the wiring and the connectors can result in misdiagnosis. Misdiagnosis may cause replacement of parts without repairing the malfunction.
^ The following conditions may cause an intermittent malfunction:
- Poor connections
- Broken insulation
- A broken wire inside the insulation
^ If an intermittent malfunction exists, refer to Troubleshooting Procedures.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
3. This step checks for a good pump motor ground.
5. This step checks for proper pump motor resistance.