C0244

DTC C0244 or P1689

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC C0244 00
- Pulse Width Modulated (PWM) Delivered Torque

DTC P1689
- Traction Control Delivered Torque Output Circuit




Diagnostic Fault Information






Circuit Description

Traction control is simultaneously controlled by the electronic brake control module (EBCM) and the powertrain control module (PCM)/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 is turned on. The ABS remains functional.
* The Stability Off indicator is turned on.



Conditions for Clearing the DTC

* The condition for the DTC is no longer present. The DTC is cleared with a scan tool.
* The EBCM automatically 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 (Component Tests and General Diagnostics).
* 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 ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) 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 (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning) for EBCM, PCM or ECM replacement, setup, and programming