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 Instructions provides 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 dome lamp switch has 3 positions: DOOR, OFF, and ON. The ON position provides a ground for continuous operation and the dome lamps will remain illuminated until the switch is placed in either the DOOR or OFF position. When in the DOOR position, the dome lamps operation is controlled by the body control module (BCM). When any door is opened, the door ajar switch contacts close and the BCM receives a door-open input. The BCM illuminates the dome lamps when any door is opened or a door lock/unlock request is activated with the key fob. After all doors have been closed, the dome lamps will remain illuminated approximately 3 seconds after the last door closes. When the driver places the dome lamp switch in the OFF position, the dome lamps will be disabled. In the event that the dome lamps were to remain illuminated for more than 10 minutes with the vehicle ON/OFF switch in the OFF position and no doors opened, the BCM will deactivate the dome lamps control circuit to prevent total battery discharge.
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 in the dome lamps control circuit.
* The BCM detects a short to ground or an open/high resistance in the F7DR (INT LAMPS) fuse B+ circuit.
Actions Taken When the DTC Sets
The front and middle dome lamps are inoperative.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction-free vehicle ON/OFF switch cycles have occurred.
Diagnostic Aids
When the F7DR (INT LAMPS) fuse is open, both dome lamps, sunshade lamps, reading lamps, and backup lamps will be inoperative. DTC B2545 will also set for the backup lamps when the vehicle is placed in the reverse gear.
Reference Information
Schematic Reference
* Interior Lights Schematics Interior Lights Schematics
* Body Control System Schematics [1][2]Body Control Systems
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Interior Lighting Systems Description and Operation Interior Lighting Systems
Electrical Information Reference
* Circuit Testing 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 Programming and Relearning for scan tool information
Circuit/System Testing
Note: Each dome lamp may need to be disconnected to isolate the short to ground. Use the schematic to identify the following:
* Each dome lamps control and ground circuit terminals
* All dome lamps equipped on the vehicle
* Component locations on the dome lamps control circuits
1. Vehicle OFF, disconnect the X5 harness connector at the K9 BCM.
2. Vehicle in Service Mode, verify that a test lamp illuminates between the F7DR (INT LAMPS) fuse B+ circuit terminal 4 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Vehicle OFF, connect the X5 harness connector at the K9 BCM.
4. Disconnect the harness connector at the inoperative dome lamp.
5. Vehicle OFF, scan tool disconnected, all doors closed, all accessories OFF, and wait 2 minutes. Test for less than 10 ohm between the ground circuit terminal 6 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
6. Connect a test lamp between the control circuit terminal 2 and ground.
7. Vehicle in Service Mode, 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.
8. If all circuits test normal, replace the appropriate dome lamp.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Reading Lamp Replacement Service and Repair
* Dome and Reading Lamp Replacement Service and Repair
* Control Module References Programming and Relearning for BCM replacement, setup, and programming