• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Dome Lamp Switch Signal | 2 | 2 | 2 | -- |
Courtesy Lamp Control | B1480 00 | 1, 2 | -- | -- |
Courtesy Lamp Control - Left Door | 2 | 2 | 2 | -- |
Courtesy Lamp Control - Right Door | 2 | 2 | 2 | -- |
Courtesy Lamp Switch - Console Control | 2 | 2 | -- | -- |
Courtesy Lamp Low Control | 2 | 1, 2 | 1, 2 | -- |
Courtesy Lamp - Left Door Ground | -- | 2 | -- | -- |
Courtesy Lamp - Right Door Ground | -- | 2 | -- | -- |
Courtesy Lamp Switch - Console Ground | -- | 2 | -- | -- |
Driver Information Center (DIC) Switch Ground | -- | 2 | -- | -- |
I/P Compartment Lamp Ground | -- | 2 | -- | -- |
Rear Compartment Lid Latch Assembly Ground | -- | 2 | -- | -- |
Rear Compartment Lid Pull Down Actuator Ground | -- | 2 | -- | -- |
Underhood Lamp Ground | -- | 2 | -- | -- |
Vanity Mirror Lamp - Right Ground | -- | 2 | -- | -- |
Vanity Mirror Lamp - Left Ground | -- | 2 | -- | -- |
1. Rearview Mirror Lamp(s) Inoperative - Inside 2. Courtesy Lamps Malfunction |
The INTERIOR LIGHTS fuse supplies battery voltage to the body control module (BCM). The BCM applies battery voltage to the courtesy lamps through the courtesy lamp supply voltage circuit. When any door is opened, the jam switch contacts close and the BCM receives a door-open input. If the BCM receives a door lock or unlock input or a rear hatch open input, the BCM will activate the courtesy lamp supply voltage circuit, providing battery voltage to all of the instrument panel (I/P) courtesy lamps, rearview mirror lamps, and rear compartment lamps. The BCM also provides a serial data message to the driver door module (DDM) and passenger door module (PDM) to apply battery voltage to the exterior courtesy lamps. In the event that any of these lamps were to remain illuminated for more than 10 minutes with the ignition switch in the OFF position, the BCM will deactivate the courtesy lamp supply voltage circuit to prevent a total battery discharge condition.
Battery voltage must be between 9-16 volts.
DTC B1480 will set when the courtesy lamp supply voltage circuit that feeds the courtesy lamps, underhood lamp, IP compartment lamp, console lamp and both visor vanity mirror lamps is shorted to ground for longer than 1 second.
The courtesy lamps, underhood lamp, I/P compartment lamp, console lamp, and both visor vanity mirror lamps will not operate.
• | The condition responsible for setting the DTC no longer exists. |
• | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred. |
Interior Lighting Systems Description and Operation
Control Module References for scan tool information
⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the BCM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |