Otc C0241 Pcm Indicated Requested Torque Malf - GMC chervolet camaro 1999 Service Manual

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Brakes
Antilock Brake System 5-211
OTC C0241 PCM Indicated Requested Torque Malf
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Circuit Description Diagnostic Aids
Traction Control is simultaneously controlled by the
EBTCM and the ECM. The EBTCM sends a requested
torque message via a Pulse Width Modulated
• It is very important that a thorough inspection of
the wiring and connectors be performed. Failure
{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 OTC
• If a defective requested torque signal is detected
by the PCM, a message is broadcasted back to
the EBTCM via class 2.
• DTC C0241 can be set anytime when ignition
voltage is present and the EBTCM detects the first
class 2 message of a defective requested
torque signal from the PCM.
Action Taken When the DTC Sets
• A malfunction OTC 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 OTC function is used.
• 100 ignition cycles have passed with no OTC(s)
detected.
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 Wiring
Systems.
• Possible causes for OTC 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 EBTCM.
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.