For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Door Lock/Indicator Schematics Connector End View Reference: Power Door Systems Connector End Views , Body Control System Connector End Views , or Electrical Center Identification Views
1 | Did you perform the Door System Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Door Systems
2 | Verify the one door or switch power door locks inoperative fault is present. Do the power door locks operate normally? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring System | Go to Step 3
3 | Is the door lock switch the inoperative component? | Go to Step 4 | Go to Step 6
4 | Are both the LOCK and UNLOCK functions inoperative? | Go to Step 10 | Go to Step 5
5 | Is the LOCK function the inoperative function? | Go to Step 11 | Go to Step 12
6 | Is the driver door lock actuator the inoperative actuator? | Go to Step 7 | Go to Step 8
7 |

1. Disconnect the driver door lock actuator.
2. Connect a test lamp between the driver door lock actuator unlock control circuit and the door lock actuator lock control circuit of the driver door lock actuator electrical connector.
3. Activate a door lock switch to the LOCK and UNLOCK positions.

Does the test lamp illuminate?

Go to Step 16

Go to Step 13

8 |

1. Disconnect the appropriate door lock actuator.
2. Connect a test lamp between the door lock actuator unlock control circuit and the door lock actuator lock control circuit of the appropriate door lock actuator electrical connector.
3. Activate a door lock switch to the LOCK position.

Does the test lamp illuminate?

Go to Step 9

Go to Step 14

9 | Activate a door lock switch to the UNLOCK position. Does the test lamp illuminate? | Go to Step 17 | Go to Step 15
10 | Test the battery positive voltage circuit from the BODY fuse to the door lock switch for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 18
11 | Test the driver door lock switch lock signal circuit for an open or short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 19
12 | Test the driver door lock switch unlock signal circuit for an open or short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 19
13 | Test the driver door lock actuator unlock control circuit for an open or short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 15
14 | Test the appropriate door lock actuator lock control circuit for an open or short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 20
15 | Test the appropriate door lock actuator unlock control circuit for an open or short to battery. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 25 | Go to Step 20
16 | 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 25 | Go to Step 21
17 | Inspect for poor connections at the appropriate 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 21 | Go to Step 21
18 | Inspect for poor connections at the appropriate 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 25 | Go to Step 22
19 | Inspect for poor connections at 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 25 | Go to Step 23
20 | Inspect for poor connections at the right I/P fuse block harness connectors. 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 25 | Go to Step 24
21 | Replace the appropriate door lock actuator. Refer to Front Side Door Latch Replacement or Rear Side Door Latch Replacement . Did you complete the repair? | Go to Step 25 | --
22 | Replace the appropriate door lock switch. Refer to Door Lock Switch Replacement - Front or to Rear Power Door Lock Switch Replacement . Did you complete the repair? | Go to Step 25 | --
23 |

1. Perform the set-up procedure for the body control module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
2. Replace the body control Module. Refer to Body Control Module Replacement in Body Control System.

Did you complete the replacement?

Go to Step 25

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24 | Replace the appropriate door lock relay. Did you complete the repair? | Go to Step 25 | --
25 | Operate the system in order to verify the repair. Did you find and correct the condition? | System OK | Go to Step 2