Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC B2610 00: Passenger Compartment Dimming 1 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Body Control Module (BCM) VB4 Fuse B+ | B1395 03 | B1395 03 | -- | -- |
DIM Fuse B+ | B2652 00 | B2652 00 | -- | -- |
I/P Dimmer Switch B+ Voltage Reference | B1395 03, B3600 03 | B3600 03 | -- | -- |
I/P Lamps Dimmer Switch Signal | B2652 00 | -- | -- | -- |
I/P Dimmer Switch Signal | B1395 03, B3600 03 | B3600 03 | 1 | -- |
LED Backlight Dimming Control | B2610 00 | 1 | 1 | -- |
I/P dimmer Switch Ground | -- | 1 | -- | -- |
1. Interior Backlighting Malfunction | ||||
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 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 ignition cycles have occurred. |
Reference Information
Schematic Reference
Interior Lights Dimming Schematics
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- With a scan tool clear the DTC.
- Ignition OFF, disconnect the harness connectors at the following components.
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
- Reconnect each component one at a time and verify that the DTC does not reset as current.
| • | Door lock switch - driver |
| • | Fog lamp switch |
| • | Heated seat switch - driver |
| • | Heated seat switch - passenger |
| • | HVAC control module |
| • | I/P multifunction switch |
| • | Outside rearview mirror switch |
| • | Radio |
| • | Steering wheel control switch |
| ⇒ | If the DTC resets, test the control circuits listed below for a short to ground. If the circuits test normal, replace the BCM. |
| • | LED dimming control terminal 18 X3 |
| • | LED dimming control terminal 21 X6 |
| ⇒ | If the DTC resets as current, test or replace the component responsible for setting the DTC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM, HVAC control module, or Radio replacement, setup, and programming |
