Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Power Door Systems Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

Verify that the power door locks key cylinder switches are inoperative.

Does the power door locks key cylinder switches system operate normally?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

Does the power door locks system operate normally?

Go to Step 4

Go to Symptoms - Doors

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the Door Cylinder Switch parameter in the body control module (BCM) data list.

Does the scan tool display Idle?

Go to Step 5

Go to Step 6

1. Activate the key cylinder switch to the Lock and Unlock positions.
2. With a scan tool, observe the Door Cylinder Switch parameter in the BCM data list.

Does the scan tool display Lock and Unlock appropriately?

Go to Step 12

Go to Step 7

1. Disconnect the harness connector of the door lock actuator.
2. With the scan tool, observe the Door Cylinder Switch parameter in the BCM data list.

Does the scan tool display Idle?

Go to Step 11

Go to Step 9

Important: If the jumper wire fuse opens when the jumper wire is connected to the signal circuit, test the signal circuit for a short to voltage.

1. Disconnect the harness connector of the door lock actuator.
2. Connect a 3-amp fused jumper wire between the door key switch signal circuit and a good ground.
3. With the scan tool, observe the Door Cylinder Switch parameter in the BCM data list.

Does the scan tool display Lock?

Go to Step 8

Go to Step 10

1. Connect the 3-amp fused jumper wire between the door key switch signal circuit and ground circuit of the harness connector.
2. With the scan tool, observe the Door Cylinder Switch parameter in the BCM data list.

Does the scan tool display Lock?

Go to Step 11

Go to Step 13

Test the door key switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 12

Test the door key switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 12

Inspect for poor connections at the harness connector of the door lock actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 14

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 16

Go to Step 15

Repair the open ground circuit. Refer to Circuit Testing and Wiring Repairs .

Did you complete the repair?

Go to Step 16

--

Replace the door lock actuator. Refer to Front Side Door Lock Replacement .

Did you complete the replacement?

Go to Step 16

--

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 16

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2