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DTC B2652

DTC B2652

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 B2652 02

Passenger Compartment Dimming 3 Circuit Short to Ground

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Interior Accent Light Control

B2652 02

2

1

-

1. Interior Accent Light at Full Intensity and Does Not Dim

2. Interior Accent Light do Not Illuminate



Circuit/System Description

The body control module (BCM) uses the ambient light sensor to determine the required brightness of the accent lighting. The BCM applies a pulse width modulated (PWM) voltage through the accent light LED control circuit which gives during daylight 70%, at night 40% and for welcome lighting 100% illumination. The following LEDs will be illuminated, if equipped:


• Accent Lamp - Passenger Door

• Accent Lamp - Driver Door

• Accent Lamp - Passenger Door Handle

• Accent Lamp - Driver Door Handle

• Center Console Compartment Lamp

• Accent Lamp - Left Rear Door Handle

• Accent Lamp - Left Rear Door

• Accent Lamp - Right Rear Door Handle

• Accent Lamp - Right Rear Door


Conditions for Running the DTC


• The ignition is ON.

• The headlamps or park lamps ON.


Conditions for Setting the DTC

The BCM detects a short to ground on the accent lighting control circuit.

Action Taken When the DTC Sets

The BCM does not attempt to illuminate the accent lighting.

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

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

When opening the passenger door the ambient illumination should go ON. When closing the driver door and locking the vehicle the accent light illumination should go OFF after 5 s.

Circuit/System Testing


1. Ignition OFF, disconnect the harness connectors at the appropriate inoperative accent light.

2. Test for less than 5 Ω between the ground circuit terminal 1 and ground of the listed accent lamps:

• E1P Accent Lamp - Passenger Door

• E1D Accent Lamp - Driver Door

• E1M Accent Lamp - Passenger Door Handle

• E1C Accent Lamp - Driver Door Handle

• E28 Center Console Compartment Lamp

• E1E Accent Lamp - Left Rear Door Handle

• E1LR Accent Lamp - Left Rear Door

• E1F Accent Lamp - Right Rear Door Handle

• E1RR Accent Lamp - Right Rear Door

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

4. Exterior lights OFF.

5. Ignition OFF.

6. Close all doors and lock the vehicle, test for less than 0.3 V between control circuit terminal 1 of the appropriate inoperative accent light and ground after 5 s.

7. If greater than the specified value, test the circuit for a short to voltage. If all circuits test normal, replace the K9 Body Control Module.

8. Unlock the vehicle.

9. Open the driver door.

10. Test for greater than 11 V between control circuit terminal 2 of the appropriate inoperative accent light and ground.

11. If less than the specified value, test the circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the K9 Body Control Module.

12. If all circuits test normal, test or replace the appropriate inoperative accent light.


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for information on BCM replacement, setup, and programming