Power Door Locks Inoperative. Chevrolet PJJ 2000

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Did you perform the Door Systems Diagnostic System Check? | -- | Go to Step 2 | Go to Diagnostic System Check - Door Systems
2 | Depress each door lock switch to LOCK and UNLOCK. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 | Are all of the door locks inoperative? | -- | Go to Step 4 | Go to Step 9

4

1. Install a scan tool.
2. With the scan tool, observe the door locks data parameter in the BCM data list.
3. Operate the door locks from both switches.

Did the scan tool display an active state from both switches?

--

Go to Step 5

Go to Step 7

5

1. Disconnect the door lock/unlock relay connector.
2. Test the battery positive voltage circuit for an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 16

Go to Step 6

6 | Test the door lock motor circuits for an open or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 16 | Go to Step 15

7

1. Disconnect the suspect switch.
2. Connect a test lamp between the battery positive voltage circuit and chassis ground.

Does the test lamp illuminate?

--

Go to Step 14

Go to Step 8

8 | Repair the open or short to ground in the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | --

9

1. Disconnect the suspect door lock motor connector.
2. Connect a test lamp between the lock control circuit and chassis ground.
3. Operate the door lock switches and observe the test lamp.

Did the test lamp illuminate?

--

Go to Step 10

Go to Step 11

10

1. Connect a test lamp between the unlock control circuit and chassis ground.
2. Operate the door lock switches and observe the test lamp.

Did the test lamp illuminate?

--

Go to Step 13

Go to Step 12

11 | Repair the open in the lock control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | --
12 | Repair the open in the unlock control circuit. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 16 | --
13 | Replace the door lock motor. Refer to Door Lock Replacement . Did you complete the replacement? | -- | Go to Step 16 | --
14 | Replace the door lock switch. Refer to Door Lock Switch Replacement . Did you complete the replacement? | -- | Go to Step 16 | --
15 | Replace the door lock/unlock relay. Did you complete the replacement? | -- | Go to Step 16 | --
16 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3