Schematic Reference: Door Lock/Indicator Schematics

Connector End View Reference: Vehicle Access Connector End Views

DEFINITION: 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

1. Install a scan tool.
2. Close all doors.
3. Turn ON the ignition, with the engine OFF.
4. Operate one of the door lock switches to both the Lock and Unlock positions.

Did DTCs U1162 and U1163 simultaneously set current when you operated the lock switch?

Go to Step 8

Go to Step 3

1. With the scan tool, observe the Door Lock Switch parameter in the driver door switch assembly (DDSA) data list.
2. Operate the driver door lock switch to both the Lock and Unlock positions.
3. With the scan tool, observe the Door Lock Switch parameter in the front passenger door module (PDM) data list.
4. Operate the front passenger door lock switch to both the Lock and Unlock positions.

Did the parameters change to both the Lock and Unlock states for both switches?

Go to Step 7

Go to Step 4

1. Turn OFF the ignition.
2. Disconnect the inoperative door lock switch harness connector.
3. Connect a 3-amp fused jumper wire between the door lock switch lock signal circuit at the harness connector and ground.
4. Turn On the ignition, with the engine OFF.
5. With the scan tool, observe the appropriate Door Lock Switch parameter.
6. Turn OFF the ignition.
7. Remove the 3-amp fused jumper from the door lock switch lock signal circuit.
8. Connect the 3-amp fused jumper wire between the door lock switch unlock signal circuit at the harness connector and ground.
9. Turn On the ignition, with the engine OFF.
10. With the scan tool, observe the appropriate Door Lock Switch parameter.

Did the Door Lock Switch parameter change state to both the Lock and Unlock states as expected?

Go to Step 5

Go to Step 6

1. Turn OFF the ignition.
2. Connect a 3-amp fused jumper wire between the door lock switch lock signal circuit and the door lock switch ground circuit at the door lock switch harness connector.
3. Turn On the ignition, with the engine OFF.
4. With the scan tool, observe the appropriate Door Lock Switch parameter.

Did the Door Lock Switch parameter change to the Lock state as expected?

Go to Step 9

Go to Step 13

Important:: If a power door lock switch signal circuit is found to be shorted to battery voltage, the lock switch may need to be replaced.

Test the Lock and Unlock signal circuits of the inoperative door lock switch for opens, shorts to each other, or short to battery. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 10

Test the door lock actuator unlock and lock control circuits of the inoperative rear door lock actuator for an open, short to ground, or short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 11

Test the lock and unlock control circuits of both rear door lock actuators for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 12

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

Did you find and correct the condition?

Go to Step 18

Go to Step 14

Inspect for poor connections at the appropriate harness connector of, either the PDM, or, if the inoperative lock is the driver door lock, the driver door switch assembly (DDSA). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 18

Go to Step 15

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

Did you find and correct the condition?

Go to Step 18

Go to Step 16

Inspect for poor connections at the harness connector of the inoperative 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 18

Go to Step 17

Locate and repair an open or high resistance in the ground circuit of the appropriate door lock switch. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 18

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Replace the appropriate door lock switch. Refer to Door Lock Switch Replacement .

Did you complete the replacement?

Go to Step 18

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Replace the PDM, or, if the inoperative lock is the driver door lock, replace the DDSA. Refer to Control Module References for replacement, setup, and programming or Door Lock Switch Replacement .

Did you complete the replacement?

Go to Step 18

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Replace the door control module. Refer to Control Module References .

Did you complete the replacement?

Go to Step 18

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Replace the inoperative door lock actuator. Refer to Rear Door Lock Replacement .

Did you complete the replacement?

Go to Step 18

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2