• | 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 |
---|---|---|---|---|
Body Control Module (BCM) B+ Terminal 2 X3 | B1480 00 | B1480 00 | -- | -- |
Inadvertent Power Courtesy Lamp Control | B1480 00 | 1 | -- | -- |
Ground | -- | 1 | -- | |
1. Courtesy Lamps Malfunction |
The body control module (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 compartment 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, dome lamps, rearview mirror lamps, and rear compartment lamps. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamp control circuit to prevent a total battery discharge condition.
Battery voltage must be between 9-16 volts.
The BCM detects a short ground in the inadvertent power courtesy lamp control circuit.
The BCM will deactivate inadvertent power to the courtesy lamps.
• | 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 B+ circuit for a short to ground or an open/high resistance. |
• | Dome/reading Lamp |
• | Left Vanity Mirror Lamp |
• | Right Vanity Mirror Lamp |
• | Reading Lamp Assembly |
• | Inside Rearview Mirror Lamp |
• | Rear Compartment Courtesy Lamp |
⇒ | 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. |
⇒ | If the DTC resets, test or replace the inoperative component. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |