P1689

DTC C0244 or P1689
DTC Descriptor
DTC C0244
Pulse Width Modulated (PWM) Delivered Torque

DTC P1689
Traction Control Delivered Torque Output Circuit

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Diagnostic System Check - Vehicle

Circuit/System Description
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
The ignition is ON and the engine is 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.
^ The Stability Caution indicator turns on.
^ The driver information center (DIC) displays the TRACTION FAILED message.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and 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
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction.

Reference Information
Schematic Reference
ABS Schematics

Connector End View Reference
^ ABS Connector End Views
^ Powertrain Control Module (PCM) Connector End Views

Electrical Information Reference
^ Circuit Testing
^ Connector Repairs
^ Testing for Intermittent Conditions and Poor Connections
^ Wiring Repairs

Scan Tool Reference
Scan Tool Data List

Circuit/System Testing
1. Use a scan tool in order to clear the DTC's. Cycle the ignition to OFF and then start the engine. A current failure will set a DTC.
^ If the DTC does not reset, go to Diagnostic Aids. Component Tests and General Diagnostics

2. Turn OFF the ignition and disconnect the PCM harness connector. At the PCM harness connector, use a DMM to measure for 12 volts on the delivered torque circuit. Turn ON the ignition.
^ If the voltage is below 10 volts, check for an open or short to ground on the requested torque circuit.
^ If the voltage is below 10 volts and an open or short to ground cannot be found, replace the EBCM/brake pressure modulator valve (BPMV) assembly.

3. Connect one end of a test lamp to ground. With the DMM still connected to the PCM harness connector, touch the other end of the test lamp to the DMM lead connected to the PCM harness connector. The DMM voltage reading should drop below 0.15 volts.
^ If the voltage does not drop to below 0.15 volts, check for a short to voltage on the requested torque circuit. If a short to voltage cannot be found, replace the PCM.

Repair Instructions

Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

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