Interior Accent Lighting Malfunction

Interior Accent Lighting Malfunction

Diagnostic Instructions

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

Diagnostic Fault Information





Circuit/System Description

The body control module (BCM) uses the ambient light sensor and the instrument panel dimming switch to determine the brightness of the accent lighting. The BCM applies a pulse width modulated (PWM) voltage through the accent light LED control circuit depending upon the dimming command received by the BCM. The following accent lamps will be illuminated, if equipped:

* Door accent lamps
* Center console accent lamps
* Instrument panel accent lamps

Reference Information
Schematic Reference

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

Component Connector End Views (Connector End Views By Name)
Description and Operation

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

* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)

Scan Tool Reference

Control Module References (Programming and Relearning)

Circuit/System Verification

Ignition ON, observe the function of the E1 accent lights while commanding the Accent Lighting 1 ON and OFF with a scan tool. All the E1 accent lights should turn ON and OFF while changing between the commanded states.

Circuit/System Testing

Note: Each accent light may need to be disconnected to isolate the short to ground. Use the schematic to identify the following:

* All accent lights equipped with the vehicle
* Component locations on the accent light control circuit
* Each component's control circuit terminals

1. Ignition OFF, disconnect the harness connector at any E1 accent light.
2. Test for less than 30 ohm between the ground circuit terminals and ground.

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

3. Connect a test lamp between the control circuit and ground
4. Command the Accent Lighting 1 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 OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.

• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

5. If all circuits test normal, test or replace the E1 accent light

Repair Instructions

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

* Front Floor Console Cup Holder Illumination Lamp Replacement (Front Floor Console Cup Holder Illumination Lamp Replacement)
* Front Floor Console Armrest Compartment Lamp Replacement (Front Floor Console Armrest Compartment Lamp Replacement)
* Front Side Door Inside Handle Illumination Lamp Replacement (Front Side Door Inside Handle Illumination Lamp Replacement)
* Rear Side Door Inside Handle Illumination Lamp Replacement (Rear Side Door Inside Handle Illumination Lamp Replacement)
* Control Module References (Programming and Relearning) for BCM replacement, setup and programming