Chevrolet Trax: DTC B2625
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- 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 02
Display Dimming Pulse Width Modulation Output Circuit Short to Ground
Diagnostic Fault Information
![Diagnostic Fault Information](images/manuals/4484/index715(1).jpg)
![Diagnostic Fault Information](images/manuals/4484/index716(2).jpg)
Circuit/System Description
The instrument panel dimmer switch is used to increase and decrease the
brightness of the interior backlighting
components. The instrument panel dimmer switch provides a voltage signal to the
body control module (BCM)
that will increase as the brightness of the lights are increased and decrease as
the brightness of the lights are
decreased. The BCM provides a low reference, signal, and B+ voltage reference
circuits to the instrument panel
dimmer switch. When the instrument panel dimmer switch is placed in the desired
position, the dimmed voltage
setting is applied from the instrument panel dimmer switch through the
instrument panel dimmer switch signal
circuit to the BCM. The BCM interprets the signal and applies a pulse width
modulated (PWM) voltage through
the LED backlight dimming control circuit illuminating the child safety lock
switch , park assist switch, and
lane departure warning switch amber LED's to the requested level of brightness.
Conditions for Running the DTC
- Battery voltage must be between 9-16 V.
- Park lamps ON
Conditions for Setting the DTC
The BCM detects a short to ground in the indicator dimming control circuit
terminal 5 X1.
Actions Taken When the DTC Sets
The child safety lock, park assist switch, and lane departure warning switch
amber indicators are inoperative
Conditions for Clearing the DTC
- The condition responsible for setting the DTC no longer exists.
- A history DTC will clear once 100 consecutive malfunction-free ignition
cycles have occurred.
Reference Information
Schematic Reference
- Interior Lights Dimming Schematics (Encore) , Interior Lights
Dimming Schematics (Trax)
- Door Lock/Indicator Schematics (Encore) , Door Lock/Indicator
Schematics (Trax)
- Object Detection Schematics (Encore) , Object Detection Schematics
(Trax)
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the appropriate harness connector listed below
at the S48E Multifunction
Switch - Center Console.
- Connect a test lamp between the control circuit terminal 8 and ground,
ignition ON.
- Verify the test lamp turns ON and OFF when commanding the Child Safety
Lock Indicator ON and OFF
with a scan tool.
- If the test lamp is always OFF
- Ignition OFF, disconnect the X1 harness connector at the K9 Body Control
Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the
circuit.
- If infinite resistance
- Test for less than 2 ohms in the control circuit end to end.
- If 2 ohms or greater, repair the open/high resistance in the circuit.
- If less than 2 ohms, replace the K9 Body Control Module
- If the test lamp is always ON
- Ignition OFF, disconnect the X1 harness connector at the K9 Body Control
Module, ignition ON.
- Test for less than 1 V between the control circuit terminal and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K9 Body Control Module.
- If the test lamp turns ON and OFF
- Test or replace the appropriate switch at the S48E Multifunction Switch
- Center Console.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
- Instrument Panel Multifunction Switch Replacement (Encore)
- Control Module References for BCM replacement, programming, and setup
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
ABS DESCRIPTION AND OPERATION
Antilock Brake System Block Diagram
Fig. 45: Antilock Brake System Block Diagram
This vehicle is equipped with the MGH 60 Mando electronic stability control
brake system. The electronic
brake control module and the brake pressure modulator are serviced separately
GENERAL PLASTIC REPAIR
WARNING:
In order to reduce the risk of personal injury when exposed to toxic
fumes
while grinding, cutting, or applying repair material on any type of sheet
molded compound or RIM rigid plastic, observe the following guidelines:
Work in a properly ventilated area
Apply p