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

Circuit/System Description

The body control module (BCM) monitors the instrument panel (I/P) lamps dimming control circuit to determine the lighting intensity of the I/P lamps. When the BCM receives a varied voltage signal on the I/P lamps dimming control circuit, it applies a corresponding pulse width modulated (PWM) voltage signal through the I/P lamps supply voltage circuit to all the I/P lamps.

Conditions for Running the DTC

* Voltage supplied to the BCM is in the normal operating range, approximately 9-14 volts.
* The ignition switch must be in the ACCESSORY or RUN position.
* The park lamps must be ON.

Conditions for Setting the DTC

* The BCM detects a short to ground in the instrument panel lamp supply voltage circuit.
* The above condition must be present for more than 1 second.

Action Taken When the DTC Sets

The I/P courtesy lamps are 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

Test the instrument panel lamp supply voltage circuit for a short to ground.

If all circuits test normal, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests