Schematic Reference: Door Lock/Indicator Schematics

Did you perform the Door Systems Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

Verify the fault is present.

Does the power door lock system 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. Observe the Door Lock Switch parameter in the Body Control Module Inputs list.

Does the scan tool display Idle?

Go to Step 4

Go to Step 13

Activate the door lock switches to the Lock and Unlock positions.

Did the parameter change to Lock and Unlock with each corresponding switch press?

Go to Step 5

Go to Step 15

1. Disconnect the driver door power lock actuator.
2. With a test lamp connected to a good ground, probe the door lock actuator lock control circuit of the harness connector.
3. Activate the driver door lock switch to the Lock position.

Did the test lamp illuminate when you activated the lock switch to the Lock position?

Go to Step 6

Go to Step 22

With a test lamp connected to a good ground, probe the door lock actuator unlock control circuit of the harness connector.

Is the test lamp illuminated?

Go to Step 17

Go to Step 7

1. With a test lamp connected to a good ground, probe the door lock actuator unlock control circuit of the harness connector.
2. Activate the driver door lock switch to the Unlock position.

Did the test lamp illuminate when you activated the lock switch to the Unlock position?

Go to Step 8

Go to Step 10

1. Connect the test lamp between the door lock actuator Lock and Unlock control circuits of the harness connector.
2. Activate the driver door lock switch to both the Lock and Unlock positions.

Did the test lamp illuminate for each position?

Go to Step 23

Go to Step 9

1. Disconnect the LT Door Unlock Relay at the rear compartment relay center 3.
2. With a test lamp connected to battery positive voltage (B+), probe the ground circuit of the LT Door Unlock Relay.

Does the test lamp illuminate?

Go to Step 12

Go to Step 30

Test the driver door lock motor unlock control circuit for an open or a high resistance. Refer to Circuit Testing Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 35

Go to Step 11

1. Disconnect the LT Door Unlock Relay at the rear compartment relay center 3.
2. With a test lamp connected to a good ground, probe each one of the battery positive voltage supply circuits of the LT Door Unlock Relay.

Did the test lamp illuminate for both circuits?

Go to Step 12

Go to Step 27

1. With the test lamp connected to battery positive voltage (B+), probe the LH Front Door Unlock Relay control circuit.
2. Unlock the doors.

Did the test lamp illuminate?

Go to Step 26

Go to Step 20

1. Disconnect one of the door lock switches.
2. With the scan tool, observe the Door Lock Switch parameter in the body control module (BCM) Inputs list.

Does the scan tool display Idle?

Go to Step 25

Go to Step 14

1. Disconnect the other door lock switch.
2. With the scan tool, observe the Door Lock Switch parameter.

Does the scan tool display Idle?

Go to Step 25

Go to Step 18

1. Disconnect the harness connector of the door lock switch that did not display both Lock and Unlock.
2. Connect a 3 amp fused jumper wire between the switch signal circuit of the inoperative state and a good ground.

Does the scan tool display the inoperative state?

Go to Step 16

Go to Step 19

Connect the 3 amp fused jumper between the door lock switch signal circuit of the inoperative state and the ground circuit of the harness connector.

Does the scan tool display the inoperative state?

Go to Step 25

Go to Step 29

1. Disconnect the LT Door Unlock Relay at the rear compartment relay center 3.
2. With a test lamp connected to battery positive voltage (B+), probe the LH Front Door Unlock Relay control circuit.

Is the test lamp illuminated?

Go to Step 21

Go to Step 26

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

Did you find and correct the condition?

Go to Step 35

Go to Step 24

Test the appropriate lock switch signal circuit for an open or a high resistance. Refer to Circuit Testing Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 35

Go to Step 24

Test the LH front door lock relay control circuit for an open or a short to battery positive voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 35

Go to Step 24

Test the LH front door lock relay 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 35

Go to Step 24

Test the door lock actuator 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 35

Go to Step 28

Inspect for poor connections at the harness connector of the driver door power 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 35

Go to Step 33

Inspect for poor connections at the harness connector of the body control module (BCM). 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 35

Go to Step 31

Inspect for poor connections at the harness connector of the inoperative door lock 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 35

Go to Step 32

Inspect for poor connections at the harness connector of the LT Door Unlock 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 35

Go to Step 34

Repair the open in the appropriate battery positive voltage (B+) supply circuit of the LT Door Unlock Relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 35

--

Repair the short to ground in the door lock actuator lock control circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 35

--

Repair the open in the appropriate door lock switch ground circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 35

--

Repair the open ground circuit of the LT Door Unlock Relay. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

Go to Step 35

--

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

Did you complete the repair?

Go to Step 35

--

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

Did you complete the repair?

Go to Step 35

--

Replace the inoperative driver door power lock actuator. Refer to Door Lock Actuator Replacement .

Did you complete the replacement?

Go to Step 35

--

Replace the LT Door Unlock Relay.

Did you complete the replacement?

Go to Step 35

--

Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2