For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views
1 | Did you perform the Diagnostic System Check for the door systems? | Go to Step 2 | Go to Diagnostic System Check - Door Systems
2 | Verify that the driver power door lock is inoperative. Does the driver power door lock operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3
3 | Verify that only the driver power door lock is inoperative. Do you have additional symptoms? | Go to Power Door Locks Inoperative - Passenger Door | Go to Step 4
4 | Is the vehicle equipped with Keyless Entry? | Go to Step 5 | Go to Step 9
5 |

1. Remove the driver door unlock relay.
2. Probe the driver door unlock control circuit, at the LH IP Junction Block, with a test lamp connected to ground.
3. While observing the test lamp, command the door locks to unlock from a door lock switch.

Did the test lamp flash or stay illuminated?

Go to Step 6

Go to Step 8

6 | Did the test lamp stay illuminated? | Go to Step 7 | Go to Step 9
7 | Test the driver door unlock control circuit for 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 17 | Go to Step 16
8 | Test the driver door unlock control 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 17 | Go to Step 11
9 |

1. Reconnect the driver door unlock relay if it was disconnected.
2. Disconnect the driver door lock actuator.
3. Probe the driver door lock actuator unlock and lock circuits, one at a time, with a test lamp connected to ground.
4. While observing the test lamp, command the door locks to lock and unlock from a door lock switch.

Did the test lamp flash, for the appropriate circuit, when the door locks were commanded to lock and unlock?

Go to Step 12

Go to Step 10

10 | Test the driver door lock actuator lock and unlock circuits for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 17 | Go to Step 13
11 | Inspect for poor connections at the 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 17 | Go to Step 16
12 | Inspect for poor connections at 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 17 | Go to Step 15
13 | Inspect for poor connections at the LH IP Junction Block. 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 17 | Go to Step 14
14 | Replace the driver door unlock relay if the vehicle is equipped with the Keyless Entry System. Replace the LH IP Junction Block if the vehicle is not equipped with the Keyless Entry System. Refer to Instrument Panel Electrical Center or Junction Block Replacement in Wiring Systems.

Did you complete the repair?

Go to Step 17

--

15 | Replace the driver door lock actuator. Refer to Front Side Door Lock Actuator Replacement . Did you complete the repair? | Go to Step 17 | --
16 | Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the repair? | Go to Step 17 | --
17 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2