DTC B2625
Diagnostic Instructions
DTC Descriptor
| DTC B2625 02: Display Dimming Pulse Width
Modulation Output Circuit Short to Ground |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Display Dimming Control
|
B2625 02
|
2
|
1
|
-
|
1. Switch illuminated when switched features Not Activated.
2. Switch do not illuminate when switched features Activated.
|
|
| |
Circuit/System Description
The body control module (BCM) supplies a reference voltage to
the backlight dimmer switch, which is part of the headlamp switch.
When the backlight dimmer switch is placed in a desired brightness
position, reference voltage is applied through the backlight dimmer
switch rheostat to the BCM. The BCM interprets this voltage signal,
then applies a pulse width modulated (PWM) voltage to the backlight
lamp control circuit, and the LED dimming control circuit
illuminating the LEDs of the components listed below, if
equipped:
| • |
Vehicle direction camera
switch |
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BCM detects a short to ground on the LED dimming control
circuit.
Action Taken When the DTC Sets
The BCM will not attempt to illuminate the LED indicator lamps
when a short circuit to ground is detected.
Conditions for Clearing the DTC
| • |
The condition responsible for
setting the DTC no longer exists. |
| • |
A history DTC will clear once
100 consecutive malfunction ignition cycles have occurred.
|
Reference Information
Schematic Reference
Connector End View Reference
Component Connector End Views
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, switch ON exterior lighting, vary the interior
backlight from dim to full bright by using the dimmer switch. The
LED of the following components should dim and then become full
bright again, if equipped:
| • |
Vehicle direction camera
switch |
Circuit/System Testing
Tour Mode and Sport Mode Switch Malfunction
| 1. |
Ignition OFF, disconnect the
harness connector at the appropriate inoperative switch.
|
| 2. |
Ignition ON, verify that a
test lamp illuminates between the LED control circuit terminal 6
and ground. |
| ⇒ |
If the test lamp does not illuminate, test the
control circuit for a short to ground or open/high resistance. If
the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ |
If the test lamp illuminates, test the ground
circuit for a short to voltage or open/high resistance. If the
circuit tests normal, replace the appropriate inoperative
switch. |
Parking Assist Switch and Vehicle Direction Camera Switch
| 1. |
Ignition OFF, disconnect the
harness connector at the S48D Multifunction Switch 2 - Instrument
Panel. |
| 2. |
Ignition ON, verify that a
test lamp illuminates between the LED control circuit and terminal
3 and ground. |
| ⇒ |
If the test lamp does not illuminate, test the
control circuit for a short to ground or open/high resistance. If
the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ |
If the test lamp illuminates, test the appropriate
ground circuit for a short to voltage or open/high resistance. If
the circuit tests normal, replace the S48D Multifunction Switch 2 -
Instrument Panel |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
