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 00
- Display Dimming Pulse Width Modulation (PWM) Output Circuit

Diagnostic Fault Information






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 LED indicator dimming supply circuit to the components on the circuit.

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 conditions for setting the DTC are no longer present.
* A history DTC clears after 100 malfunction-free ignition cycles.

Circuit/System Verification

Ignition ON, headlamp switch to PARK, 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. Ignition OFF, disconnect the harness connector at the affected component.
2. Connect a test lamp between the listed LED dimming control circuit terminal and ground.

* IP multifunction switch terminal 6
* 4wd mode switch terminal 4
* PTO switch terminal 7

3. Command the dimming test high to low with a scan tool. The test lamp should turn from bright to dim when changing between the commanded states.

^ If the test lamp is always off, test the control circuit for an open/high resistance or short to ground. If the circuit tests normal, replace the BCM.

^ If the test lamp is always bright, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

4. If all circuits test normal, test or replace the affected component.

Repair Instructions

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

* Refer to the appropriate replacement procedure for the component causing the condition.