• | 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) 1 Fuse B+ | B1395 03 | B1395 03 | -- | -- |
I/P Dimming Voltage Reference | B1395 03 | B2652 00 | B1395 07 | -- |
I/P Dimmer Switch Signal | B1395 03 | 1 | 1 | -- |
I/P Lamps Dimmer Switch Signal | B2652 00 | 1 | 1 | -- |
Courtesy Lamps Control | B2615 00, 1 | 1 | 1 | -- |
Indicator Dimming Control | B2625 00 | 1 | 1 | -- |
LED Backlight Dimming Control | B2610 00 | 1 | 1 | -- |
I/P Dimmer Switch Low Reference | -- | 1 | -- | -- |
I/P Dimmer Switch Ground | -- | 1 | -- | -- |
1. Interior Backlighting Malfunction |
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 front 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 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.
DTC B2615 00 will set when the BCM detects a short to ground in the courtesy lamps voltage supply circuit.
The BCM will not illuminate any courtesy lamps supplied by the courtesy lamps voltage supply circuit.
• | 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
• | LH I/P courtesy lamp |
• | LH Vanity Mirror |
• | Liftgate courtesy lamp |
• | Middle overhead console courtesy lamps |
• | Overhead console courtesy lamps |
• | Rear dome lamp |
• | RH I/P courtesy lamp |
• | RH Vanity Mirror |
⇒ | If the DTC resets, test the courtesy lamps voltage supply circuit for a short to voltage, short to ground, or an open/high resistance. If the circuits test normal, replace the BCM. |
⇒ | If the DTC resets as current, test or replace the component responsible for setting the DTC. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |