Diagnostic Instructions
| • | 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. |
DTC Descriptor
DTC B2615 00 : Passenger Compartment Dimming 2 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Body Control Module (BCM) 1 Fuse B+ Supply | B1395 03 | B1395 03 | -- | -- |
Courtesy Lamps Voltage Supply | B2615 00, 1 | 1 | 1 | -- |
I/P Dimmer Switch Signal | B1395 03 | 1 | 1 | -- |
I/P Lamps Dimmer Switch Signal | B2652 00 | 1 | 1 | -- |
I/P Dimming Voltage Reference | B1395 03 | B2652 00 | B1395 07 | -- |
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 | ||||
Circuit/System Description
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 GMLAN 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. For more detailed information concerning courtesy lamp operation refer to Interior Lighting Systems Description and Operation .
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
DTC B2615 00 will set when the BCM detects a short to ground in the courtesy lamps voltage supply circuit.
Actions Taken When the DTC Sets
The BCM will not illuminate any courtesy lamps supplied by the courtesy lamps voltage supply circuit.
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists. |
| • | You issue a scan tool CLEAR DTCs command. |
| • | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred. |
Reference Information
Schematic Reference
Connector End View Reference
Lighting Systems Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- With a scan tool clear the DTC.
- Ignition OFF, disconnect the harness connectors at the following components:
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- Reconnect each component one at a time and verify that the DTC does not reset as current.
| • | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
