Diagnostic Instructions
DTC Descriptor
DTC B2610 00: Passenger Compartment Dimming 1 Circuit
Diagnostic Fault Information
Circuit
| Short to Ground
| Open/High Resistance
| Short to Voltage
| Signal Performance
|
LED Backlight Lamp Control
| B2610 00
| 2
| 1
| --
|
1. Interior LED Backlighting Does Not Dim
2. Interior LED Backlighting Inoperative
|
Circuit/System Description
The body control module (BCM) supplies a voltage reference through the instrument panel (I/P) dimming voltage reference circuit to the interior lamp dimmer switch, which is part of the headlamp switch. When the dimmer switch is placed in a desired brightness
position, reference voltage is applied through the dimmer switch rheostat and the I/P lamps dimmer switch signal circuit to the BCM. The BCM interprets this voltage signal, then applies a variable voltage through the LED backlight lamp control circuit illuminating
the components listed below, if equipped:
| • | Diver information center (DIC) switch |
| • | Head up display (HUD) Switch |
| • | Rear seat audio (RSA) control |
| • | Rear video/HVAC control |
| • | Steering wheel control switch |
Conditions for Running the DTC
| • | The headlamps or park lamps ON. |
Conditions for Setting the DTC
The BCM detects a short to ground on the LED backlight lamp control circuit.
Action Taken When the DTC Sets
The BCM will not DIM or illuminate any LED backlighting supplied by the backlight lamp control circuits.
Conditions for Clearing the DTC
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
Component Connector End Views
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command LED Dimming ON with a scan tool. The LED Dimming Relay Command parameter should display On and the LED Dimming should illuminate.
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at all components fed by the LED backlight lamp control circuits listed below.
| • | LED backlight lamp control terminal 18 X3 |
| • | LED backlight lamp control terminal 21 X6 |
- Ignition ON, clear the DTC with a scan tool.
- Operate the vehicle within the conditions for running the DTC and verify the DTC does not reset.
| ⇒ | If the DTC resets, test the control circuits for a short to ground. If the circuits test normal, replace the BCM. |
- 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 after completing the diagnostic procedure.
