Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC C0244 00: Pulse Width Modulated (PWM) Delivered TorqueDTC P1689: Traction Control Delivered Torque Output Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Pulse Width Modulated (PWM) Delivered Torque Signal Circuit | C0244 00 | C0244 00 | C0244 00 | -- |
Traction Control Delivered Torque Signal Circuit | P1689 | P1689 | P1689 | -- |
Circuit Description
Traction control is simultaneously controlled by the electronic brake control module (EBCM) and the powertrain control module (PCM) or engine control module (ECM). The PCM/ECM sends DELIVERED TORQUE message via a Pulse Width Modulated (PWM) signal to the PCM/ECM 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 is ON. |
| • | The DTC can be set after system initialization. |
Conditions for Setting the DTC
A malfunction is detected if one of the following conditions exist:
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:
| • | The EBCM disables the TCS/VSES for the duration of the ignition cycle. |
| • | A malfunction DTC will set. |
| • | The Traction Control Off indicator is illuminated. The ABS remains functional. |
| • | The Stability Off indicator is illuminated. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present. |
| • | The EBCM clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
| • | Inspect the grounds of both the PCM/ECM and the EBCM, ensuring each ground is clean and torqued to the proper specification. |
| • | It is 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 the Torque delivered Control circuit. |
| - | Torque Delivered Control circuit shorted to ground or voltage. |
| - | Communication frequency problem. |
| - | Communication duty cycle problem. |
| - | Torque Delivered Control circuit has a wiring problem, terminal corrosion, or poor connections. |
| - | EBCM not receiving information from the PCM/ECM. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Engine ON, observe the scan tool delivered torque signal duty cycle from the PCM/ECM to the EBCM in the PCM or ECM scan tool data list. The displayed value should be 90 percent.
Circuit/System Testing
Ignition ON, with a DMM test for battery voltage of the delivered torque signal circuit between the EBCM and the PCM/ECM and ground.
| ⇒ | If less than the specified range, test the delivered torque signal circuit for an open/high resistance, and short to ground. If the circuit tests normal, replace the EBCM. |
| ⇒ | If greater than the specified range, test the delivered torque signal circuit for a short to voltage. If the circuit tests normal, replace the PCM/ECM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM, PCM or ECM replacement, setup, and programming
