Circuit Description
The powertrain control module (PCM) and the electronic brake control module (EBCM) communicate on the serial data link whenever the ignition is ON.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0240 EBCM Malfunction
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The engine is running at a speed greater than 450 RPM for 5-20 seconds. |
Conditions for Setting the DTC
The EBCM receives a serial data message stating that the PCM has lost the ability to reduce engine torque.
Action Taken When the DTC Sets
| • | The EBCM disables the vehicle stability enhancement system (VSES). |
| • | Engine torque reduction is disabled. |
| • | The traction off indicator turns ON. |
| • | The message center displays the service stability system or stability system disabled message. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
A requested torque signal malfunction is only one possible cause for setting this DTC. DTC C0240 may set due to engine overheating, throttle actuator control failure, loss of ignition timing control by the PCM, etc. If DTC P0856 has not set, refer to Symptoms - Engine Controls or Symptoms - Engine Controls in order to identify other possible causes of DTC C0240.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 | Is DTC P0856 set? | -- | Go to Diagnostic Aids |
