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DTC B2615

DTC B2615

Diagnostic Instructions


• Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• Diagnostic Procedure Instructions has overviews of all diagnostic categories.


DTC Descriptor

DTC B2615 02

Passenger Compartment Dimming 2 Circuit Short to Ground

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Courtesy Lamps Control

B2615 02

2

1

-

1. Courtesy Lamps Always Illuminated

2. Courtesy Lamps do Not Illuminate



Circuit/System Description

Battery voltage for the courtesy lamps is supplied at all times 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 control circuits to the courtesy lamps listed below.


• Dome/reading lamps

• Dome/Reading lamps row

• Accent lamp left lower Instrument Panel

• Accent lamp right lower Instrument Panel

• Accent lamp driver seat

• Accent lamp passenger seat

• Accent lamp driver door handle

• Accent lamp passenger door handle


Conditions for Running the DTC

The BCM attempts to illuminate the courtesy lamps.

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 BCM will not attempt to activate 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 ignition cycles have occurred.


Reference Information

Schematic Reference

Interior Lights Dimming Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Interior Lighting Systems Description and Operation

Electrical Information Reference


• Circuit Testing

• Connector Repairs

• Testing for Intermittent Conditions and Poor Connections

• Wiring Repairs


Scan Tool Reference

Control Module References for information on diagnostic tools

Circuit/System Verification

Command the Courtesy Lamps test 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 harness connectors at the appropriate inoperative backlighting component.

2. Test for less than 5 Ω between the black wire of the component and ground.

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

4. Connect a test lamp between the control circuit of the component grey wire and ground.

5. Command the Courtesy Lamps Dimming ON and OFF with a scan tool.

6. If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

7. If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module.

8. If all circuit test normal, test or replace the appropriate inoperative component.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Reading Lamp Replacement

• Front Floor Flood Lamp Replacement

• Front Side Door Sill Courtesy Lamp Replacement

• Rear Compartment Courtesy Lamp Replacement

• Control Module References for BCM or instrument cluster replacement, setup, and programming