DTC C0244 or P1689. GMC Truck Canyon Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 2009 🢒 Canyon Pickup - 2WD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC C0244 or P1689

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: Pulse Width Modulated (PWM) Delivered Torque

The electronic brake control module (EBCM) and the powertrain control module (PCM) simultaneously control the Traction Control System (TCS). The PCM sends a Delivered Torque message via a pulse width modulated (PWM) signal to the EBCM. The duty cycle of the signal is used to determine how much engine torque the PCM is delivering.

Conditions for Running the DTC

Ignition ON, engine running.

Conditions for Setting the DTC

•	Pulse signals from the Delivered Torque signal are not detected or are abnormal.

•	The Duty Cycle is less than 5 percent or more than 95 percent.

Action Taken When the DTC Sets

•	The EBCM disables TCS and vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

•	A DIC message and/or a warning indicator may be displayed.

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 50 consecutive drive cycles.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

Important: It is recommend that the defective components be replaced, and not the complete brake master cylinder assembly.

Ignition OFF, disconnect the harness connector X3 at the ECM.
Ignition ON, test for 12 volts between the signal circuit terminal 34 and ground.

⇒	If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.

⇒	If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the EBCM.

If the circuits test normal, replace the ECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for EBCM/BPMV or ECM replacement, setup, and programming