B2615 (with YF7)

DTC B2615 (with YF7)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy 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 BCM 3 Fuse located in the underhood fuse block, to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it applies voltage through the courtesy lamps relay control circuit in order to energize the relay. With the relay energized, battery voltage is applied through switch side of the relay and the courtesy lamp supply voltage circuits to the courtesy lamps listed below.

* Front dome lamp
* Rear dome lamp

Conditions for Running the DTC

* Ignition ON.
* Courtesy lamps ON.

Conditions for Setting the DTC

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

Action Taken When the DTC Sets

The BCM will deactivate the courtesy lamps.

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 ignition cycles have occurred.

Reference Information
Schematic Reference

Interior Lights Dimming Schematics (Interior Lights Dimming Schematics)
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 the scan tool. The interior 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 control circuit terminal 5 and the right front turn signal for a short to ground. If all circuits and component test normal, replace the BCM.

3. Ignition OFF, connect the X4 harness connector at the BCM and disconnect the X1 harness connector at the underhood fuse block.
4. Connect a test lamp between the control circuit terminal 20 and ground.
5. Ignition ON, 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 ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
• 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 BCM.

6. If all circuits test normal, replace the underhood fuse block.

Repair Instructions

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

* Body Wiring Harness Junction Block Replacement (Body Wiring Harness Junction Block Replacement)
* Control Module References (Programming and Relearning) for BCM replacement, setup, and programming