DTC B2652
Diagnostic Instructions
DTC Descriptor
| DTC B2652 02: Passenger Compartment Dimming 3
Circuit Short to Ground |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Interior Accent Light Control
|
B2652 02
|
2
|
1
|
-
|
1. Interior Accent Light at Full Intensity and Does Not Dim
2. Interior Accent Light do Not Illuminate
|
|
| |
Circuit/System Description
The body control module (BCM) uses the ambient light sensor and
the instrument panel dimming switch to determine the brightness of
the accent lighting. The BCM applies a pulse width modulated (PWM)
voltage through the accent light LED control circuit, daylight
conditions 70%, night conditions 40% and as welcome light 100%
illumination. The following LEDs will be illuminated, if
equipped:
| • |
Center console accent
lamps |
Conditions for Running the DTC
| • |
The headlamps or park lamps
ON. |
Conditions for Setting the DTC
The BCM detects a short to ground on the accent lighting control
circuit.
Action Taken When the DTC Sets
The BCM does not attempt to illuminate the accent lighting.
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
Interior Lights Dimming Schematics
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
When opening the passenger door the ambient illumination should
go ON. When closing the driver door and locking the vehicle the
courtesy lighting should go OFF after 20 s and the accent light
illumination should remain ON at the commanded illumination dimming
level with ignition ON.
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connectors at the appropriate inoperative accent
light. |
| 2. |
Test for less than 5 Ω
between the following ground circuit terminals and ground:
|
| |
• |
E1D Accent Lamp - Driver Door
terminal 2 |
| |
• |
E1P Accent Lamp - Passenger
Door terminal 2 |
| |
• |
E1V Accent Lamp - Shift Lever
terminal 2 |
| ⇒ |
If greater than the specified range, test the
ground circuit for an open/high resistance. |
| 5. |
Close all doors and lock the
vehicle, test for less than 0.3 V between control circuit terminal
listed below of the appropriate inoperative accent light and ground
after 20 s: |
| |
• |
E1D Accent Lamp - Driver Door
terminal 1 |
| |
• |
E1P Accent Lamp - Passenger
Door terminal 1 |
| |
• |
E1V Accent Lamp - Shift Lever
terminal 1 |
| ⇒ |
If greater than the specified value, test the
circuit for a short to voltage. If the circuits test normal replace
the K9 Body Control Module. |
| 8. |
Test for greater than 11 V
between control circuit terminal listed below of the appropriate
inoperative accent light and ground: |
| |
• |
E1D Accent Lamp - Driver Door
terminal 1 |
| |
• |
E1P Accent Lamp - Passenger
Door terminal 1 |
| |
• |
E1V Accent Lamp - Shift Lever
terminal 1 |
| ⇒ |
If less than the specified value, test the circuit
for a short to ground or an open/high resistance. If the circuits
test normal, replace the K9 Body Control Module. |
| 9. |
If all circuits test normal,
test or replace the appropriate inoperative accent light.
|
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for BCM replacement, setup, and
programming
|
