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1. Install a scan tool and with all of the doors closed, verify the door ajar switch parameters are Door Closed. If any of the door ajar switch parameters are Door Ajar while the doors are closed 2. Open the doors and verify the door ajar switch parameters are Door Ajar. If any of the door ajar switch parameters are Door Closed while the doors are open 3. If the door ajar switch inputs to the BCM function normally replace the IPC. Circuit/System Testing Door Ajar Switch Circuit Test 1. Ignition OFF, disconnect the harness connector at the affected door latch. 2. Test for less than 1 ohm between the listed ground circuit terminal and ground. Driver with power door locks terminal 8 Driver with out power door locks terminal 6 Front passenger and right rear terminal 3 Left rear terminal 6 If greater than the specified range, test the ground circuit for an open/high resistance. 3. Ignition ON, verify the scan tool door ajar switch parameter is Door Closed. If not the specified value, test the listed signal circuit terminal for a short to ground. If Driver with power door locks terminal 6 Driver with out power door locks terminal 4 Front passenger and right rear terminal 1 Left rear terminal 4 4. Install a 3A fused jumper wire between the listed signal circuit terminal and low reference circuit terminal. Verify the scan tool door ajar switch parameter is Door Ajar. Driver with power door locks terminal 6 to terminal 8 Driver with out power door locks terminal 4 to terminal 6 Front passenger and right rear terminal 1 to terminal 3 Left rear terminal 4 to terminal 6 If not the specified value, test the signal circuit for a short to voltage or an open/high
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
5. If all circuits test normal, test or replace the affected door latch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Front Side Door Lock Replacement Rear Door Lock Replacement (Extended Cab Upper) or Rear Door Lock Control Module References for the IPC or BCM replacement, setup, and programming POWER DOOR LOCKS INOPERATIVE - FRONT (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 and passenger door lock and side window switches are integrated control module 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
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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 Verification Ignition ON, observe the scan tool Door Lock Actuator Cmd parameter while operating the If the reading does not change relative to the actual switch position, replace the affected Circuit/System Testing Front Door Lock Circuit Test 1. Disconnect the harness connector at the affected door latch, and connect a test lamp between the listed lock actuator control circuit terminals. Driver terminal 5 to 6 Passenger terminal 2 to 3 2. Verify that the test lamp illuminates while the lock switch is operated to lock and unlock. If the test lamp does not illuminate, test the lock actuator control circuits for an 3. If the circuits test normal replace the affected door lock and side window switch. Repair Procedures Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Front Side Door Lock Replacement Control Module References for DDS or PDS replacement, programming, and setup
2008 Chevrolet Silverado 1500 2008 ACCESSORIES & EQUIPMENT Vehicle Access - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
POWER DOOR LOCKS INOPERATIVE - FRONT (W/O 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 power door locks are controlled by the body control module (BCM) through lock and 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
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