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Sunshade Illumination Malfunction

Sunshade Illumination Malfunction

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.


Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Sunshade Lamps B+

1, 2, 3

2

-

-

Sunshade Lamps Ground

-

2

-

-

1. Reading Lamps Always OFF

2. Sunshade Lamps Always OFF

3. Instrument Panel Compartment Lamp Always OFF



Circuit/System Description

The body control module (BCM) supplies the dome/reading lamps, sunshade and instrument panel compartment lamp with battery voltage. When switching on the following components the concerning lamps will illuminate:


• Dome/reading lamps

• Sunshade left Front

• Sunshade right Front

• Instrument panel compartment lamp


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

Ignition ON, observe the lamp of the sunshade left front/sunshade right front while opening and closing it. The lamp should illuminate when opened.

Circuit/System Testing


Sunshade Light Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate sunshade.

• A3L Sunshade - Left

• A3R Sunshade - Right

2. Test for less than 5 Ω between the ground circuit terminal B and ground.

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

4. Ignition ON, test for greater than 11 V between the circuit terminal A and the ground circuit terminal B.

5. If less than the specified range, test the 12 V circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module.

6. If all circuits test normal, test or replace the appropriate sunshade.

• A3L Sunshade - Left

• A3R Sunshade - Right


Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Sunshade Replacement

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