Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

Verify that the driver power door lock inoperative fault is present.

Does the driver power door lock operate normally?

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 a scan tool, observe the door lock switch parameter in the Body Control Module data list.

Does the scan tool display Idle?

Go to Step 5

Go to Step 4

1. Turn off the ignition.
2. Disconnect the LF door switch.
3. Turn on the ignition, with the engine off.
4. With a scan tool, observe the door lock switch parameter in the Body Control Module data list.

Does the scan tool display Idle?

Go to Step 25

Go to Step 16

1. With a scan tool, observe the door lock switch parameter in the Body Control Module data list.
2. Activate the LH door lock switch to the UNLOCK position.

Does the scan tool display Unlock?

Go to Step 6

Go to Step 17

1. With a scan tool, observe the door lock switch parameter in the Body Control Module data list.
2. Activate the LH door lock switch to the LOCK position.

Does the scan tool display Lock?

Go to Step 7

Go to Step 18

1. Turn the ignition off.
2. Disconnect the door lock relay.
3. Probe the battery positive voltage circuit of the door lock relay with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 8

Go to Step 9

Probe the ground circuit of the door lock relay with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 10

Go to Step 29

Test the battery positive voltage circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 23

Probe the driver door unlock control circuit of the door lock relay with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 19

Go to Step 11

1. Probe the driver door unlock control circuit of the door lock relay with a test lamp that is connected to battery positive voltage.
2. Activate the LH door lock switch to the UNLOCK position.

Does the test lamp illuminate?

Go to Step 12

Go to Step 20

Probe the door lock control circuit of the door lock relay with a test lamp that is connected to battery positive voltage.

Does the test lamp illuminate?

Go to Step 21

Go to Step 13

1. Probe the door lock control circuit of the door lock relay with a test lamp that is connected to battery positive voltage.
2. Activate the LH door lock switch to the LOCK position.

Does the test lamp illuminate?

Go to Step 14

Go to Step 22

1. Connect the door lock relay.
2. Disconnect the driver door lock actuator.
3. Probe the driver door lock actuator unlock control circuit of the driver door lock actuator with a test lamp that is connected to a good ground.
4. Activate the LH door lock switch to the UNLOCK position.

Does the test lamp illuminate?

Go to Step 15

Go to Step 23

1. Probe the driver door lock actuator lock control circuit of the driver door lock actuator with a test lamp that is connected to a good ground.
2. Activate the LH door lock switch to the LOCK position.

Does the test lamp illuminate?

Go to Step 28

Go to Step 24

Test the driver door lock switch signal circuits for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Test the driver door lock switch unlock signal circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 26

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

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Test the driver door unlock control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 26

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

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Test the driver door lock control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 26

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

Did you find and correct the condition?

Go to Step 34

Go to Step 26

Test the driver door lock actuator unlock control circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 24

Test the door lock actuator lock control circuit for a short to ground or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

Go to Step 27

Inspect for poor connections at the harness connector of the LF door switch. 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 34

Go to Step 30

Inspect for poor connections at the harness connector of the body control module. 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 34

Go to Step 31

Inspect for poor connections at the harness connector of the door lock relay. 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 34

Go to Step 32

Inspect for poor connections at the harness connector of the driver door lock actuator. 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 34

Go to Step 33

Repair the ground circuit of the door lock relay. Refer to Wiring Repairs and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 34

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Replace the LF door switch. Refer to Power Accessory Switch Panel Replacement .

Did you complete the replacement?

Go to Step 34

--

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

Did you complete the replacement?

Go to Step 34

--

Replace the door lock relay. Refer to Power Door Lock Relay Replacement .

Did you complete the replacement?

Go to Step 34

--

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

Did you complete the replacement?

Go to Step 34

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2