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 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 lights are increased and decrease as the brightness of the lights are decreased. The body control module (BCM) provides a low reference signal and a B+ voltage reference to the I/P dimmer switch. 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 I/P lamps supply voltage circuit and the interior backlighting components dim to the requested level. Ground for the I/P dimmer switch is provided at G201.
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.
Action 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 Dimming Schematics (Interior Lights Dimming Schematic)
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 X4 harness connector at the BCM.
2. Ignition ON, test for B+ between the B+ circuit terminal 4 and ground.
• If not the specified value, test the B+ circuit for a short to ground or an open/high resistance.
3. Ignition OFF, connect the X4 harness connector at the BCM.
4. Disconnect the X2 harness connector at the BCM.
5. Ignition ON, test for B+ between the B+ circuit terminal 2 and ground.
• If not the specified value, test the B+ circuit for a short to ground or an open/high resistance.
6. Ignition OFF, connect the X2 harness connector at the BCM.
7. With a scan tool clear the DTC.
8. Ignition OFF, disconnect the harness connectors at the following components fed by the LED backlight dimming control circuit:
* Driver information center (DIC) switch
* HVAC control module
* Rear window wiper/washer/fog lamp switch
* Radio
* Steering wheel control switch - left
* Steering wheel control switch - right
* Traction control switch (TCS)
* Window Switch - driver
9. Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
• If the DTC resets, test the LED backlight dimming control circuit for a short to ground. If the circuits test normal, replace the BCM.
10. Reconnect each component one at a time and verify that 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.
* Front Side Door Window Switch Replacement (Front Side Door Window Switch Replacement)
* Driver Information Display Switch Replacement (Service and Repair)
* Hazard Warning Switch Replacement (Service and Repair)
* Fog Lamp Switch Replacement (Service and Repair)
* Steering Wheel Control Switch Assembly Replacement (Equinox) (Service and Repair)Steering Wheel Control Switch Assembly Replacement (Torrent) (Service and Repair)
* Control Module References (Programming and Relearning) for BCM, HVAC control module, or Radio replacement, setup, and programming