For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Interior Lights Schematics Connector End View Reference: Vehicle Access Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 | Verify that the door ajar indicator is malfunctioning. Does the door ajar indicator operate normally? | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3
3 | Is the door ajar indicator ON all the time? | Go to Step 4 | Go to Step 8
4 |

1. Install a scan tool.
2. Close all of the doors.
3. Turn ON the ignition, with the engine OFF.
4. With a scan tool, observe the Driver Door Ajar Sw. and the Passenger Door Ajar Sw. parameters in the body control module (BCM) data list.

Does the scan tool display Door Ajar for either of the parameters?

Go to Step 5

Go to Step 19

5 | Is the Driver Door Ajar sw. parameter displaying Door Ajar? | Go to Step 6 | Go to Step 7
6 |

1. With a scan tool, observe the Driver Door Ajar Sw. parameter in the BCM data list.
2. Disconnect the driver ajar switch assembly harness connector.

Does the scan tool display Door Closed?

Go to Step 20

Go to Step 15

7 |

1. With a scan tool, observe the Passenger Door Ajar Sw. parameter in the BCM data list.
2. Disconnect each of the passenger ajar switch assembly harness connectors, one at a time.

Does the scan tool display Door Closed when any of the harness connectors is disconnected?

Go to Step 20

Go to Step 16

8 | Is the door ajar indicator inoperative from the driver door? | Go to Step 9 | Go to Step 12
9 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Disconnect the driver ajar switch assembly harness connector.
4. Connect a 3-amp fused jumper wire between the left front door ajar switch signal circuit of the driver ajar switch assembly harness connector and a good ground.
5. With a scan tool, observe the Driver Door Ajar Sw. parameter in the BCM data list.

Does the scan tool display Door Ajar?

Go to Step 10

Go to Step 17

10 | Is the door ajar indicator illuminated? | Go to Step 11 | Go to Step 19
11 |

1. Connect a 3-amp fused jumper wire between the left front door ajar switch signal circuit of the driver ajar switch assembly harness connector and the ground circuit of the driver ajar switch assembly harness connector.
2. With a scan tool, observe the Driver Door Ajar Sw. parameter in the BCM data list.

Does the scan tool display Door Ajar?

Go to Step 20

Go to Step 22

12 |

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. Disconnect the appropriate passenger ajar switch assembly harness connector.
4. Connect a 3-amp fused jumper wire between the door ajar switch signal circuit of the appropriate passenger ajar switch assembly harness connector and a good ground.
5. With a scan tool, observe the Passenger Door Ajar Sw. parameter in the BCM data list.

Does the scan tool display Door Ajar?

Go to Step 13

Go to Step 18

13 | Is the door ajar indicator illuminated? | Go to Step 14 | Go to Step 19
14 |

1. Connect a 3-amp fused jumper wire between the door ajar switch signal circuit of the appropriate passenger ajar switch assembly harness connector and the ground circuit of the appropriate passenger ajar switch assembly harness connector.
2. With a scan tool, observe the Passenger Door Ajar Sw. parameter in the BCM data list.

Does the scan tool display Door Ajar?

Go to Step 20

Go to Step 22

15 | Test the left front door ajar switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 21
16 | Test the appropriate door ajar switch signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 21
17 | Test the left front door ajar switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 21
18 | Test the appropriate door ajar switch signal circuit for an open. Refer to Circuit Testing and Wiring Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 21
19 | Inspect for poor connections at the harness connector of the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 23
20 | Inspect for poor connections at the harness connector of the appropriate door ajar switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 24
21 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs. Did you find and correct the condition? | Go to Step 26 | Go to Step 25
22 | Repair the open in the appropriate ground circuit. Refer to Wiring Repairs and Connector Repairs. Did you find and correct the condition? | Go to Step 26 | --
23 | Replace the IPC. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 26 | --
24 | Replace the appropriate ajar switch assembly. Did you complete the replacement? | Go to Step 26 | --
25 | Replace the BCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 26 | --
26 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2