B2625
DTC B2625
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC B2625
- Display Dimming Pulse Width Modulation (PWM) Output Circuit
Diagnostic Fault Information
Circuit/System 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 illumination lamps to a desired intensity. When this occurs, the BCM directly sends a pulse width modulated (PWM) voltage based on the I/P dimmer switch position through the instrument panel lamps dimming control circuit to the instrument panel illumination lamps.
Conditions for Running the DTC
The battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
* The TBC 4 fuse battery supply circuit to the BCM is open or shorted to ground.
* The LED dimming supply voltage circuit is shorted to ground.
Action Taken When the DTC Sets
The switch LED indicators will be inoperative.
Conditions for Clearing the 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.
Circuit/System Testing
1. Ignition OFF, disconnect the BCM connector X3.
2. Verify that a test lamp illuminates between the B+ circuit terminal B4 and ground.
^ If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the courtesy lamp supply circuit terminal B3 for a short to ground.
3. If the circuits test normal replace the BCM.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests