With RPO Code YF7

DTC B2615 (with RPO Code YF7)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* 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 Circuit

Diagnostic Fault Information






Circuit/System Description

Battery voltage for the courtesy lamps is supplied at all times, from the INT LIGHTS 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

* The ignition is ON
* The courtesy lamps must be commanded 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.

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.

3. Ignition OFF, disconnect the X1 harness connector at the body 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 the circuit tests normal, replace the underhood fuse block.

Repair Instructions

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

* Body Wiring Harness Junction Block Replacement