Diagnostic Routine J

Diagnostic Routine J

Diagnostic Overview

All The Courtesy Lamps Stay On Continuously

Refer to Wiring Diagram Set 117 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Courtesy Lamps .

REFER to Door Ajar Switch .

DTC Fault Trigger Conditions






Visual Inspection and Diagnostic Pre-checks

- Inspect the doors for correct latching.

Pinpoint Test

1. CHECK THE DOOR AJAR SWITCH PIDs (Parameter Identifications)

1. Ignition ON.

2. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

3. Monitor the BCM (Body Control Module) DOOR_SW_LR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR PIDs (Parameter Identifications) while opening and closing all the doors.

Do all the door ajar switch PID (Parameter Identification) values agree with the door positions?







2. BYPASS THE SUSPECT DOOR LATCH

1. Disconnect: Suspect Door Latch.

2. Connect:





3. Using a scan tool, view BCM (Body Control Module) PIDs (Parameter Identifications).

4. Monitor the BCM (Body Control Module) DOOR_SW_LR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR PIDs (Parameter Identifications).

Does the PID (Parameter Identification) indicate the door in question is closed?







3. BYPASS THE DOOR LATCH GROUND CIRCUIT

1. Connect:





2. Monitor the BCM (Body Control Module) DOOR_SW_LR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR PIDs (Parameter Identifications).

Does the PID indicate the door in question is closed?







4. CHECK THE SUSPECT DOOR AJAR SWITCH INPUT CIRCUIT FOR AN OPEN

1. Disconnect: BCM (Body Control Module) C2280B.

2. Measure:





Is the resistance less than 3 ohms?







5. CHECK THE DOOR LATCH RETURN CIRCUIT TO THE DOOR MODULE FOR AN OPEN

1. Connect: Suspect Door Latch.

2. Disconnect: Suspect Door Module.

3. Connect:





4. Close the door.

5. Monitor the BCM (Body Control Module) DOOR_SW_LR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR PIDs (Parameter Identifications).

Does the PID (Parameter Identification) indicate the door is closed?







6. CHECK THE DOOR MODULE GROUND CIRCUIT FOR AN OPEN

1. Connect:





2. Monitor the BCM (Body Control Module) DOOR_SW_LR, DOOR_SW_PSGR, DOOR_SW_LR and DOOR_SW_RR PIDs (Parameter Identifications).

Does the PID indicate the door is closed?







7. CHECK FOR CORRECT BCM (Body Control Module) OPERATION

1. Disconnect the BCM (Body Control Module) connectors.

2. Repair:

- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

3. Reconnect the BCM (Body Control Module) connectors and make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?