B2652
DTC B2652
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.
DTC Descriptor
DTC B2652 02
- Passenger Compartment Dimming 3 Circuit Short to Ground
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, daylight conditions 70%, night conditions 40% and as welcome light 100% illumination. The following LEDs will be illuminated, if equipped:
* Door accent lamps
* Center console accent lamps
* Instrument panel accent lamps
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 (Interior Lights Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Description and Operation
Interior Lighting Systems Description and Operation (Interior Lighting Systems Description and Operation)
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) for scan tool information
Circuit/System Verification
When opening the passenger door the ambient illumination should go ON. When closing the driver door and locking the vehicle the courtesy lighting should go OFF after 20 s and the accent light illumination should remain ON at the commanded illumination dimming level with ignition ON.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connectors at the appropriate inoperative accent light.
2. Test for less than 5 ohm between the following ground circuit terminals and ground.
* E1C Accent Lamp - Driver Door Handle and E1D Accent Lamp - Driver Door terminal A
* E1M Accent Lamp - Passenger Door Handle and E1P Accent Lamp - Passenger Door terminal A
* E1E Accent Lamp - Left Rear Door Handle and E1LR Accent Lamp - Left Rear Door terminal A
* E1F Accent Lamp - Right Rear Door Handle and E1RR Accent Lamp - Right Rear Door terminal A
* Instrument panel accent lamp terminal B
* Center console accent lamp terminal B
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Exterior lights OFF.
4. Ignition OFF.
5. Close all doors and lock the vehicle, test for less than 0.3 V between control circuit terminal listed below of the appropriate inoperative accent light and ground after 20 s.
* E1D Accent Lamp - Driver Door terminal B
* E1P Accent Lamp - Passenger Door terminal B
* E1LR Accent Lamp - Left Rear Door terminal B
* E1RR Accent Lamp - Right Rear Door terminal B
* E1C Accent Lamp - Driver Door Handle terminal C
* E1M Accent Lamp - Passenger Door Handle terminal C
* E1E Accent Lamp - Left Rear Door Handle terminal C
* E1F Accent Lamp - Right Rear Door Handle terminal C
* Instrument panel accent lamp terminal A
* Center console accent lamp terminal A
• If greater than the specified value, test the circuit for a short to voltage. If the circuits test normal replace the K9 Body Control Module.
6. Unlock the vehicle.
7. Open the driver door.
8. Test for greater than 11 V between control circuit terminal listed below of the appropriate inoperative accent light and ground.
* E1D Accent Lamp - Driver Door terminal B
* E1P Accent Lamp - Passenger Door terminal B
* E1LR Accent Lamp - Left Rear Door terminal B
* E1RR Accent Lamp - Right Rear Door terminal B
* E1C Accent Lamp - Driver Door Handle terminal C
* E1M Accent Lamp - Passenger Door Handle terminal C
* E1E Accent Lamp - Left Rear Door Handle terminal C
* E1F Accent Lamp - Right Rear Door Handle terminal C
* Instrument panel accent lamp terminal A
* Center console accent lamp terminal A
• If less than the specified value, test the circuit for a short to ground or an open/high resistance. If the circuits test normal replace the K9 Body Control Module.
9. If all circuits test normal, test or replace the appropriate inoperative 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