C0241

Part 1 Of 2:

Part 2 Of 2:

CIRCUIT DESCRIPTION
Traction Control is simultaneously controlled by the Electronic Brake and Traction Control Module (EBTCM) and the Engine Control Module (ECM). The EBTCM 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 EBTCM supplies the pull up voltage.

CONDITIONS FOR SETTING THE DTC
^ If a defective requested torque signal is detected by the ECM, a PWM signal outside the normal range (95-97 %) is sent back to the EBTCM via the delivered torque circuit. The DTC will set if the EBTCM receives the out of range signal for 30 milliseconds continuously.
^ DTC C0241 can be set anytime when ignition voltage is present and the EBTCM detects an engine RPM greater than 480 RPM.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction Diagnostic Trouble Code (DTC) is stored.
^ The Traction Control System (TCS) is disabled.
^ The TO indicator is fumed 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
- Possible causes for DTC C0241 to set:
- Open in the requested torque circuit.
- Requested torque circuit shorted to ground or voltage.
- Communication problem.
- Requested torque circuit has a wiring problem, terminal corrosion, or poor connections.
- ECM not receiving information from the EBTCM.

TEST DESCRIPTION
The numbers below refer to step numbers on the diagnostic table.
4. Step 4 checks for the proper requested torque value.
5. Step 5 checks if the ECM is sending back a PWM signal of 95-97 % via the delivered engine torque circuit indicating a defective requested torque signal. If the ECM is sending this signal, after the requested torque checks OK with the scan tool in step 4, the ECM is suspect.
7. Step 7 checks for the presence of a pull-up