C0242
DTC C0242
Circuit Description
The electronic brake control module (EBCM) and the powertrain control module (PCM) simultaneously control the traction control. The EBCM sends a serial data message to the PCM requesting torque reduction. When certain PCM DTC's are set, the PCM will not be able to perform the torque reduction for traction control. A serial data message is sent to the EBCM indicating that traction control is not allowed.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0242 PCM Indicated TCS Malfunction
Conditions for Running the DTC
^ The ignition is ON.
^ Ignition voltage is greater than 8 volts.
Conditions for Setting the DTC
The PCM diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the EBCM indicating that torque reduction is not allowed. The PCM will typically set a DTC and the EBCM will set this DTC.
Action Taken When the DTC Sets
^ The EBCM disables the engine management portion of the Traction Control System (TCS).
^ The Traction Off indicator turns ON.
^ The message center displays the Service Traction System message.
^ The ABS 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 EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the Antilock Brake System (ABS)/TCS.
