C0243

DTC C0243

Circuit Description
Engine Drag Control (EDC) The EBCM sends a Engine Drag Control (EDC) request via a dedicated data line. The PCM supplies a pull up voltage of 5 volts that the EBCM switches to ground to create the signal.

Conditions for Running the DTC
The engine is running.

Conditions for Setting the DTC
The EBCM receives a serial data message from the PCM indicating that the EDC circuit has failed.

Action Taken When the DTC Sets
^ The EBCM disables the EDC for the duration of the ignition cycle.
^ The DIC displays the Service Stability System message.
^ The ABS/TCS remains functional.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The Electronic Brake Control Module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
The following conditions can cause this concern:
^ An open in the EDC control circuit.
^ An short to ground or voltage in the EDC control circuit.
^ A wiring problem, terminal corrosion, or poor connection in the EDC control circuit.

Test Description

Steps 1 - 10:

The number below refer to the step number on the diagnostic table.
9. This vehicle is equipped with a ECM which uses an Electrically Erasable Programmable Read Only Memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.