B2610

DTC B2610

CIRCUIT DESCRIPTION
The body control module (BCM) receives a variable voltage signal from the instrument panel (I/P) dimmer switch requesting to illuminate the instrument panel controls illumination lamps to a desired intensity. When this occurs, the BCM directly sends a variable voltage based on the I/P dimmer switch position on the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuit.

Voltage for the backlight lamps control circuit, instrument panel lamps dimming control circuit, and the LED dimming signal circuits is from the TBC 3 fuse 16 in the underhood fuse block directly through the BCM to these circuits.

CONDITIONS FOR RUNNING THE DTC
The battery voltage must be between 9.0-16.0 volts.

CONDITIONS FOR SETTING THE DTC
- The backlight lamps control circuit is open, shorted to ground, or shorted to voltage.
- The instrument panel lamps dimming control circuit is open, shorted to ground, or shorted to voltage.
- The LED dimming signal circuit is shorted to ground.
- There is a loss of the underhood fuse block TBC 3 battery supply voltage to the BCM for 1 second.

ACTION TAKEN WHEN THE DTC SETS
The instrument panel illumination lamps and the controls illumination lamps will not operate or are always ON.

CONDITIONS FOR CLEARING THE MIL/DTC
- This DTC will clear on current status after the condition for setting the fault is corrected.
- A history DTC will clear after 100 consecutive ignition cycles without a fault present.
- History and current DTCs can be cleared using a scan tool.

DIAGNOSTIC AIDS
- Perform a visual inspection for loose or poor connections at all related components.
- A short to ground in the following circuits will cause the TBC 3 fuse to open.
- The backlight lamps control.
- The instrument panel lamps dimming control.
- The LED dimming signal.
- Battery positive voltage from the underhood fuse block TBC 3 fuse.
- An open in the TBC 3 fuse will cause the BCM to set the following DTC:
- B0951
- B2610
- B2625

TEST DESCRIPTION

Steps 1-6:

Steps 7-11:

The numbers below refer to the step numbers on the diagnostic table.
5. This step test determines if the problem exists in the headlamp switch or the BCM.
10. After replacement of the BCM you must calibrate the new module for proper operation.