B2615

DTC B2615

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* ReviewStrategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.


DTC Descriptor
DTC B2615 00
- Passenger Compartment Dimming 2 Circuit



Diagnostic Fault Information





Circuit/System Description

Battery voltage for the courtesy lamps is supplied at all times, from the CTSY/RF TRN Fuse located in the rear fuse block, to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it then applies voltage through the courtesy lamps supply voltage circuits to the courtesy lamps listed below.

* Left and right roof rail courtesy/reading lamps
* Overhead console lamp


Conditions for Running the DTC

* The BCM attempts to illuminate the courtesy lamps.
* Engine ON, the BCM attempts to illuminate the day time running lamps.
* Ignition ON with the right turn signal switch active, the BCM attempts to illuminate the right front turn signal.


Conditions for Setting the DTC

* The BCM detects a short to ground on the courtesy lamp supply voltage circuit.
* The BCM detects a short to ground on the right front turn signal supply voltage circuit.


Action Taken When the DTC Sets

The BCM will not attempt to activate courtesy lamps or the right front turn signal.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.


Reference Information
Schematic Reference

Interior Lights Schematics (Interior Lights Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Interior Lighting Systems Description and Operation (Interior Lighting Systems Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for Scan Tool Information

Circuit/System Verification

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

Circuit/System Testing

1. Ignition OFF, disconnect the X4 harness connector at the BCM.
2. Verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the supply voltage circuits listed below for a short to ground.

* Right front turn signal lamp supply voltage terminal 5 X4
* Courtesy lamp supply voltage terminal 1 X6
* Courtesy lamp supply voltage terminal 5 X2

3. Ignition OFF, connect the X4 harness connector at the BCM.
4. Disconnect the harness connectors at all components fed by the supply voltage circuits listed below.

* Right front turn signal lamp supply voltage terminal 5 X4
* Courtesy lamp supply voltage terminal 1 X6
* Courtesy lamp supply voltage terminal 5 X2

5. Ignition ON, clear the DTC with a scan tool.
6. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.

• If the DTC resets, test the supply voltage circuits for a short to ground. If the circuits test normal, replace the BCM.

7. Reconnect each component one at a time and verify that the DTC does not reset.

• If the DTC resets, test or replace the component responsible for setting the DTC.



Repair Instructions

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

* Roof Rail Rear Courtesy Lamp Replacement (Roof Rail Rear Courtesy Lamp Replacement)
* Overhead Console Reading Lamp and Bulb Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for BCM replacement, setup, and programming