Pinpoint Test F: The Interior Courtesy Lamps Stay On Continuously

Interior Lighting

Pinpoint Test F: The Interior Courtesy Lamps Stay On Continuously

Refer to Wiring Diagram Set 89, Interior Lamps for schematic and connector information Electrical Diagrams.

Normal Operation

When the Body Control Module (BCM) detects a request for the courtesy lamps (such as an open door or liftgate), the BCM (Body Control Module) provides voltage to the interior courtesy lamps.

- DTC B1313:15 (Interior Lighting Output: Circuit Short To Battery or Open)- sets when the BCM (Body Control Module) detects a short to voltage from the interior courtesy lighting output circuit.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- BCM (Body Control Module)

PINPOINT TEST F : THE INTERIOR COURTESY LAMPS STAY ON CONTINUOUSLY

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

F1 CHECK THE DOOR AND LIFTGATE AJAR SWITCH PIDs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: BCM (Body Control Module) DataLogger.

- Monitor the BCM (Body Control Module) door ajar switch PIDs (DOOR_SW_DRVR, DOOR_SW_PSGR, DOOR_SW_LR, DOOR_SW_RR, DOOR_SW_LUGG) while opening and closing all the doors.

Do all the door and liftgate ajar switch PID values agree with the door and liftgate positions?

Yes
GO to F2.

No
GO to Pinpoint Test E Pinpoint Test E: All The Courtesy Lamps Stay On Continuously.

F2 CHECK THE INTERIOR COURTESY LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: BCM (Body Control Module) C2280A.

- Ignition ON.

Do the interior courtesy lamps continue to illuminate?

Yes
REPAIR circuit VLN33 (GY/VT) for a short to voltage. TEST the system for normal operation.

No
GO to F3.

F3 CHECK FOR CORRECT BCM (Body Control Module) OPERATION

- Disconnect all the BCM (Body Control Module) connectors.

- Check for:
- corrosion

- damaged pins

- pushed-out pins


- Connect all the BCM (Body Control Module) connectors and make sure they seat correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes
INSTALL a new BCM (Body Control Module). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.