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 General Electrical Diagnosis Procedures in Diagnostic Aids under Diagrams.
^ Possible causes for DTC C0241 to set:
- Open in the CKT 463.
- CKT 463 shorted to ground or voltage.
- Communication problem.
- CKT 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. Step 4 checks for the proper requested torque value received at the PCM. This value is in percent of torque.
5. Step 5 checks for the proper requested torque value sent from the EBTCM. This value is in newton meters of torque.
7. Step 7 checks for the presence of a pull-up voltage from the PCM