Schematic Reference: Door Lock/Indicator Schematics

Important:: The automatic door lock system can be programed to perform different functions and may also be disabled. Before continuing with the diagnosis of the system, ensure that the automatic door locks are programmed to perform the specific function that is the cause of the complaint. For further information, refer to Vehicle Personalization in Personalization.

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

Lock and unlock the doors from any of the door lock switches.

Does the door lock system function properly?

Go to Step 3

Go to Symptoms - Doors

1. Install the scan tool.
2. Using output controls, command the doors to lock and unlock.

Do the doors lock and unlock when commanded?

Go to Step 4

Go to Step 5

1. Start the engine.
2. Using the scan tool, monitor the TR Sw. data parameter in the transmission data display table.
3. Place the transmission in all gear ranges while monitoring the scan tool.

Does the scan tool display the correct data parameter values?

Go to Step 6

Go to Diagnostic System Check - Engine Controls in Engine Controls

Test for an open in the door lock and door unlock control circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Inspect for poor connections at the BCM harness connectors. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 8

Go to Step 6

Important: Perform the setup procedure for the body control module.

Replace the body control module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the repair?

Go to Step 8

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 3