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 Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

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. Turn ON the ignition, with the engine OFF.
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 Range Selector Displays Incorrect Range in Automatic Transmission

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 body control module (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

Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

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