P1689

DTC C0244 or P1689





Test 1-4





Test 5-12

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

Conditions for Running the DTC
^ The ignition switch is ON.
^ The DTC can be set after system initialization.

Conditions for Setting the DTC
DTC C0244 can be set anytime when ignition voltage is present. A malfunction exists if the PWM signal is out of range or no signal is received for a period of 2 seconds.

Action Taken When the DTC Sets
If equipped, the following actions occur:
^ 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
^ The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

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 C0244 to set:
- Open in delivered torque circuit.
- Delivered torque circuit shorted to ground or voltage.
- Communication frequency problem.
- Communication duty cycle problem.
- Delivered torque circuit has a wiring problem, terminal corrosion, or poor connections.
- EBCM not receiving information from the PCM.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
4. Use the scan tool in order to determine if the delivered torque signal has a valid duty cycle.
10. This vehicle is equipped with a PCM which uses an Electrically Erasable Programmable Read Only Memory (EEPROM). When replacing the PCM, the replacement PCM must be programmed.