B2652

DTC B2652

Diagnostic Instructions

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



DTC Descriptor
DTC B2652 02
- Inadvertent Load Circuit Low Voltage




Diagnostic Fault Information






Circuit/System Description

The rear electrical center (REC) applies battery voltage to the dome lamp and the left and right vanity mirrors through the inadvertent courtesy lamp control circuit. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the REC will deactivate the inadvertent courtesy lamp control circuit to prevent a total battery discharge condition.


Conditions for Running the DTC

Battery voltage must be between 9-16 volts.


Conditions for Setting the DTC

DTC B2652 02 will set when the REC detects a short to ground in the inadvertent courtesy lamp control circuit.


Actions Taken When the DTC Sets

The REC will disable the inadvertent courtesy lamp control circuit.


Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 consecutive malfunction-free 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 (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the following components.

* Dome lamp
* Vanity mirror - left
* Vanity mirror - right

2. Ignition ON, verify a test lamp illuminates between the control circuit terminals listed below and ground.

* Dome lamp terminal 6 - uplevel
* Dome lamp terminal 2 - standard
* Vanity mirror terminal A - left
* Vanity mirror terminal A - right


• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the REC.

3. Connect each component one at a time and verify with a scan tool if the DTC resets as current.
4. If the DTC resets, test or replace the inoperative component.



Repair Instructions

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

* Sunshade Replacement (Visor) (Service and Repair)Sunshade Replacement (Visor Cover) (Service and Repair)
* Dome Lamp Replacement (Dome Lamp Replacement)
* Overhead Console Reading Lamp and Bulb Replacement (Overhead Console Reading Lamp and Bulb Replacement)
* Control Module References (Programming and Relearning) for REC replacement, setup, and programming