B2615

DTC B2615

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides an overview of each diagnostic category.

DTC Descriptor
DTC B2615 02
- Passenger Compartment Dimming 2 Circuit Short to Ground

Diagnostic Fault Information






Circuit/System Description

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 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.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

The BCM detects a short to ground on the courtesy lamp control circuit.

Action Taken When the DTC Sets

The courtesy lamps and the dome/reading lamps will be inoperative.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear after 100 consecutive fault-free ignition cycles have occurred.

Reference Information
Schematic Reference

Interior Lights Schematics Interior Lighting Systems
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Interior Lighting Systems Description and Operation
Electrical Information Reference

* Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Verification

Command the Courtesy Lamps ON and OFF with a scan tool. The courtesy lamps should turn ON and OFF when changing between the commanded states.

Circuit/System Testing

Note: Each courtesy and dome/reading lamp may need to be disconnected to isolate the short to ground. Use the schematic to identify the following:

* All courtesy and dome/reading lamp equipped with the vehicle
* Component locations on the courtesy and dome/reading lamp control circuit
* Each component's control circuit terminals

1. Vehicle OFF, disconnect the X7 harness connector at the K9 BCM.
2. Vehicle in Service Mode, verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

• If the test lamp does not illuminate, test the B+ circuit for short to ground or an open/high resistance.

3. Vehicle OFF, connect the X7 harness connector at the K9 BCM and disconnect the harness connector at any courtesy and dome/reading lamp.
4. Test for less than 30 ohm between the ground circuit terminal and ground.

• If greater than the specified range, test the ground circuit for an open/high resistance.

5. Connect a test lamp between the control circuit terminal and ground.
6. Command the Courtesy Lamps ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.

• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 BCM.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

7. If all circuits test normal, test or replace the courtesy or dome/reading lamp.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Control Module References Control Module Referencesfor BCM control module replacement, programming and setup