Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Power Door Systems Connector End Views

DEFINITION: The doors do not Unlock from the driver door key lock cylinder, or, the doors do not Lock from the driver door key lock cylinder. This test assumes that all DTCs have been diagnosed.

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

Verify that the Power Door Locks Inoperative - Key Cylinder Switches complaint is present.

Does the Central Door Lock and Central Door Unlock systems operate as described in the Description and Operation?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Step 3

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With the scan tool, observe the Door Cylinder Switch parameter in the driver door module (DDM) data list.
4. If the vehicle is equipped with the Central Door Lock feature (export), insert the door key into the driver door lock cylinder, turn it to the Lock position and hold it there for 3-5 seconds.
5. If the vehicle is equipped with the Central Door Unlock feature, insert the door key into the driver door lock cylinder, turn it to the Unlock position and hold it there for 3-5 seconds.

Does the Door Cylinder Switch parameter change to the appropriate state as expected?

Go to Step 8

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the driver door latch assembly harness connector.
3. Turn ON the ignition, with the engine OFF.
4. Install a 3-amp fused jumper wire between the driver door key switch signal circuit at the driver door latch assembly harness connector and ground.
5. With the scan tool, observe the Door Cylinder Switch parameter.

Does the Door Cylinder Switch parameter change to the appropriate state?

Go to Step 5

Go to Step 6

1. Install a 3-amp fused jumper wire between the driver door key switch signal and ground circuit at the driver door latch assembly harness connector.
2. With the scan tool, observe the Door Cylinder Switch parameter.

Does the Door Cylinder Switch parameter change to the appropriate state?

Go to Step 7

Go to Step 9

Test the driver door key switch signal circuit for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 12

Go to Step 8

Inspect for poor connections at the harness connector of the driver door latch assembly. 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 12

Go to Step 10

Inspect for poor connections at the harness connector of the DDM. 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 12

Go to Step 11

Locate and repair an open or high resistance in the driver door latch assembly ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 12

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Replace the driver door latch assembly. Refer to Front Side Door Lock and Inside Handle Rod Replacement .

Did you complete the replacement?

Go to Step 12

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

Did you complete the replacement?

Go to Step 12

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2