B2610

DTC B2610

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 B2610
- Passenger Compartment Dimming 1 Circuit

Diagnostic Fault Information






Circuit/System Description

The instrument panel (I/P) lamp dimmer switch is used to increase and decrease the brightness of the interior backlighting components. The I/P dimmer switch provides a voltage signal that will increase as the brightness of the light are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) provides the I/P dimmer switch with a 10-volt reference, a low reference signal, and a low reference circuit. When the I/P dimmer switch is placed in the desired position, the dimmed voltage setting is applied from the I/P dimmer switch through the I/P dimmer switch signal circuit to the BCM. The BCM interprets the signal and applies the dimmed voltage to the instrument panel lamp 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 will set when the BCM detects a short to ground in the instrument panel lamp control circuit.

Action Taken When the DTC Sets

The BCM will not dim or illuminate any indicators supplied by the instrument panel 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 Dimming Schematics Interior Lights Dimming Schematics
Connector End View Reference

Component Connector End Views
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 Control Module References for scan too information

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the components fed by the instrument panel lamp control circuits listed below:

* Instrument panel lamp control circuit terminal 48 connector X1
* Instrument panel lamp control circuit terminal 44 connector X2

2. Ignition ON, clear the DTC with a scan tool.
3. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.

• If the DTC resets, test the instrument panel lamp control circuit for a short to ground. If the circuit tests normal, replace the BCM.

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

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

Repair Instructions

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

* Headlamp Switch Replacement Service and Repair
* Front Side Door Window Switch Replacement - Left Side Front Side Door Window Switch Replacement - Left Side
* Front Side Door Window Switch Replacement - Right Side Front Side Door Window Switch Replacement - Right Side
* Door Lock Switch Replacement - Driver Door Door Lock Switch Replacement - Driver Door
* Door Lock Switch Replacement - Passenger Front Door Lock Switch Replacement - Passenger Front
* Interior Lamp and Multifunction Switch Replacement Service and Repair
* Power Sliding Door (PSD) Open/Close Pillar Switch Replacement Service and Repair
* Power Mirror Switch Replacement Service and Repair
* Control Module References Control Module References for BCM, HVAC control module, IPC, and Radio replacement, setup, and programming