B2610

DTC B2610

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 B2610 00
- Passenger Compartment Dimming 1 Circuit




Diagnostic Fault Information






Circuit/System Description

The up/down dimmer controls located on the headlamp and panel dimmer switch is used to increase and decrease the brightness of the interior backlighting components. Each dimmer control switch provides a voltage signal that will increase as the brightness of the lights are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) supplies each dimmer control switch with a signal circuit. When either the up or down dimmer control switch is placed in the desired position, the dimmed voltage setting is applied from the appropriate dimmer control switch through the dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies the dimmed voltage to the LED backlight dimming control circuit and the interior backlighting components dim to the requested level.


Conditions for Running the DTC

* Battery voltage must be between 9-16 volts.
* Park lamps ON.



Conditions for Setting the DTC

DTC B2610 00 will set when the BCM detects a short to ground in the LED backlight dimming control circuit.


Actions Taken When the DTC Sets

The BCM will not dim or illuminate any indicators supplied by the LED backlight dimming 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. With a scan tool clear the DTC.
2. Ignition OFF, disconnect the harness connectors at the following components.

* Door lock/window switch
* Headlamp and panel dimmer switch
* Steering wheel controls
* Multifunction switch - center console
* Automatic transmission shift lever
* Dome/reading lamps - with CF5

3. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.

• If the DTC resets, test the control circuit terminal 18 X3 for a short to ground. If the circuits test normal, replace the BCM.

4. Reconnect each component one at a time and verify the DTC does not reset as current.

• If the DTC resets as current, test or replace the component responsible for setting the DTC.




Repair Instructions

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

* Reading Lamp Replacement (Service and Repair)
* Transmission Floor Shift Control Indicator Lamp Replacement (Service and Repair)
* Instrument Panel Lamp Dimmer Switch Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for BCM replacement, setup, and programming