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DTC P1689 Traction Control Delivered Torque Output Circuit Diagnostic Fault Information Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Circuit/System Description The electronic brake control module (EBCM) and the powertrain control module (PCM) 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 The Stability Caution indicator turns on. The driver information center (DIC) displays the TRACTION FAILED message. The DIC displays the SERVICE STAB SYS 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 Diagnostic Aids Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Reference Information
2007 Hummer H3 2007 BRAKES Antilock Brake System - H3
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