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: Passenger Compartment Dimming 1 CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Instrument Panel Lamp Control | B2610 | 1 | 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 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
Connector End View Reference
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan too information
Circuit/System Testing
- Ignition OFF, disconnect the harness connectors at the components fed by the instrument panel lamp control circuits listed below:
- 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.
- Reconnect each component one at a time and verify that the DTC does not reset.
| • | Instrument panel lamp control circuit terminal 48 connector X1 |
| • | Instrument panel lamp control circuit terminal 44 connector X2 |
| ⇒ | If the DTC resets, test the instrument panel lamp control circuit for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the DTC resets, 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, IPC, and Radio replacement, setup, and programming |
