C0243

DTC C0243

Circuit Description

The electronic brake control module (EBCM) sends an engine drag control (EDC) request via a dedicated data line. The engine control module (ECM) supplies a pull up voltage of 12 volts that the EBCM switches to ground to create the signal.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC C0243 Engine Drag Control

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.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

9. This vehicle is equipped with an ECM which uses an electrically erasable programmable read only memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.

Step 1 - Step 8:

Step 9 - Step 10: