B2625

DTC B2625

DTC DESCRIPTOR

DTC B2625 00

Display Dimming Pulse Width Modulation (PWM) Output Circuit

DIAGNOSTIC FAULT INFORMATION





Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

CIRCUIT/SYSTEM DESCRIPTION
When the interior lamps dimming switch is activated, a variable voltage signal is applied through the instrument panel lamps dimmer switch signal circuit to the body control module (BCM). The BCM then applies a variable voltage signal through the light emitting diode (LED) Indicator dimming supply circuit to the following components:
- Front Parking Display
- Heated Seat Switches
- HVAC Control Heads

CONDITIONS FOR RUNNING THE DTC
The ignition is ON.

CONDITIONS FOR SETTING THE DTC
The BCM receives a ground signal on the LED indicator dimming supply circuit

ACTION TAKEN WHEN THE DTC SETS
The BCM cease attempt to dim or illuminate the LED indicator lamps.

CONDITIONS FOR CLEARING THE DTC
The BCM clears this code from current when the fault is removed from the system.

Circuit/System Verification
Ignition ON, cover the ambient light sensor, vary the interior lamp dimming switch from dim to full bright. The LED lamps should dim and then become full bright.

Circuit/System Testing
1. Disconnect all the LED indicator dimming supply circuit lamps related components. Verify the DTC B2625 does not set
- If the DTC resets then test for a short to ground in the LED indicator dimming supply circuit lamps circuit. If the circuit/connections test normal replace the BCM.
2. Reconnect each component one at a time and test for the DTC B2625. If the DTC resets then replace that component.

Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests
- Seat Switch Replacement - Power
- Heated and Cooled Seat Switch Replacement
- HVAC Control Module Replacement
- Control Module References for BCM replacement, setup, and programming Programming and Relearning