C0241

Circuit Description
Traction Control is simultaneously controlled by the EBCM and the ECM. The EBCM sends a requested torque message via a Pulse Width Modulated (PWM) signal to the ECM requesting a desired engine torque level for proper Traction Control system operation. The PCM supplies the pull up voltage.

Conditions for Setting the DTC
^ If a defective requested torque signal is detected by the PCM, a message is broadcasted back to the EBCM via class 2.
^ DTC C0241 can be set anytime when ignition voltage is present and the EBCM detects the first class 2 message of a defective requested torque signal from the PCM.

Action Taken When the DTC Sets
^ A malfunction DTC is stored.
^ The TCS is disabled.
^ The TRAC OFF indicator is turned on. The ABS remains functional.

Conditions for Clearing the DTC
^ Condition for DTC is no longer present and scan tool clear DTC function is used.
^ 100 ignition cycles have passed with no DTC(s) detected.

Diagnostic Aids
^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ If an intermittent malfunction exists, refer to Checking Aftermarket Accessories.
^ Possible causes for DTC C0241 to set:
^ Open in the circuit 463.
^ Circuit 463 shorted to ground or voltage.
^ Communication problem.
^ Circuit 463 has a wiring problem, terminal corrosion, or poor connections.
^ PCM not receiving information from the EBCM.

Test Description
The numbers below refer to step numbers on the diagnostic table.
4. This step checks for the proper requested torque value received at the PCM. This value is in percent of torque.
5. This step checks for the proper requested torque value sent from the EBCM. This value is in newton meters of torque.
7. This step checks for the presence of a pull-up voltage from the PCM.