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Conditions for Running the DTC Battery voltage is between 9-16 volts. Conditions for Setting the DTC A door lock or unlock switch input to the BCM is active for greater than 60 seconds. Action Taken When the DTC Sets The input signal will be ignored by the BCM for as long as the code is current. Conditions for Clearing the DTC When the input signal has inactive for 2.5 seconds the DTC will be a history status code. The history code will clear after 50 fault-free ignition cycles or by using the scan tool clear Diagnostic Aids A current switch code indicates that the switch is stuck or the signal circuit is shorted to ground. Reference Information Schematic Reference Door Lock/Indicator Schematics Connector End View Reference Component Connector End Views Description and Operation Power Door Locks Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Scan Tool Reference Control Module References for Scan Tool Information Circuit/System Verification Observe the scan tool door lock and unlock switch parameters while operating the switch to the Circuit/System Testing 1. Ignition OFF, disconnect the harness connector at the door lock switch. 2. Test for less than 1 ohm of resistance between the ground circuit terminal B and ground. If greater than the specified range, test the ground circuit for an open/high resistance. 3. Verify the scan tool door lock and unlock switch parameters are inactive. If not the specified value, test the signal circuit listed below for a short to ground. If Lock terminal D Unlock terminal E 4. Install a 3A fused jumper wire between the signal circuits listed below and the ground circuit terminal B. Verify the scan tool door lock and unlock switch parameters are active. Lock terminal D Unlock terminal E If not the specified value, test the signal circuit for a short to voltage or an open/high 5. If all circuits test normal, test or replace the door lock switch. Component Testing 1. Ignition OFF, disconnect the harness connector at the door lock switch. 2. Test for infinite resistance between the signal terminal listed below and the ground terminal B with the switch in the open position. Lock terminal D Unlock terminal E If not the specified value, replace the door lock switch. 3. Test for less than 1 ohm between the signal terminal listed below and the ground terminal B with the switch in the closed position.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Lock terminal D Unlock terminal E If greater than the specified range, replace the door lock switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Door Lock and Side Window Switch Replacement - Driver Side Door Lock and Side Window Switch Replacement - Passenger Side Control Module References for BCM replacement, programming, and setup SYMPTOMS - VEHICLE ACCESS 1. Perform the Diagnostic System Check - Vehicle before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control modules can communicate via the serial data link. 2. Review the system operation in order to familiarize yourself with the system functions. Refer to the following system descriptions: Power Door Locks Description and Operation Door Ajar Indicator Description and Operation (w/AN3)Door Ajar Indicator Visual/Physical Inspection Inspect for aftermarket devices which could affect the operation of the system. Refer to Inspect the easily accessible or visible system components for obvious damage or conditions Intermittent Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to IMPORTANT: The following steps must be completed before using the symptom tables.
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Symptom List Refer to a symptom diagnostic procedure from the following list in order to diagnose the Door Ajar Indicator Malfunction (w/AN3) or Door Ajar Indicator Malfunction (w/o Power Door Locks Inoperative - Front (w/AN3) or Power Door Locks Inoperative - Power Door Locks Inoperative - Rear DOOR AJAR INDICATOR MALFUNCTION (W/AN3) 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 Circuit/System Description The driver door switch (DDS) and the passenger door switch (PDS) receive a discrete input from Reference Information Schematic Reference Instrument Cluster Schematics Connector End View Reference Component Connector End Views
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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