DTC B2652
DTC B2652 |
Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
has overviews of all diagnostic categories.
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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
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B2652 02
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2
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1
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-
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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 to determine the required brightness of the accent lighting. The BCM applies a pulse width modulated (PWM) voltage through the accent light LED control circuit which gives during daylight 70%, at night 40% and for welcome lighting 100% illumination. The following LEDs will be illuminated, if equipped:
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Accent Lamp - Passenger Door
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Accent Lamp - Driver Door
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Accent Lamp - Passenger Door Handle
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Accent Lamp - Driver Door Handle
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Center Console Compartment Lamp
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Accent Lamp - Left Rear Door Handle
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Accent Lamp - Left Rear Door
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Accent Lamp - Right Rear Door Handle
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Accent Lamp - Right Rear Door
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Conditions for Running the DTC |
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The ignition is ON.
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The headlamps or park lamps ON.
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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 |
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The condition responsible for setting the DTC no longer exists.
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A history DTC will clear once 100 consecutive malfunction ignition cycles have occurred.
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Reference Information |
Schematic Reference
Interior Lights Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Interior Lighting Systems Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for information on diagnostic tools
Circuit/System Verification |
When opening the passenger door the ambient illumination should go ON. When closing the driver door and locking the vehicle the accent light illumination should go OFF after 5 s.
Circuit/System Testing |
1. |
Ignition OFF, disconnect the harness connectors at the appropriate inoperative accent light.
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2. |
Test for less than 5 Ω between the ground circuit terminal 2 and ground of the listed accent lamps:
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E1P Accent Lamp - Passenger Door
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E1D Accent Lamp - Driver Door
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E1M Accent Lamp - Passenger Door Handle
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E1C Accent Lamp - Driver Door Handle
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E28 Center Console Compartment Lamp
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E1E Accent Lamp - Left Rear Door Handle
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E1LR Accent Lamp - Left Rear Door
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E1F Accent Lamp - Right Rear Door Handle
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E1RR Accent Lamp - Right Rear Door
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3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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4. |
Exterior lights OFF
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5. |
Ignition OFF
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6. |
Close all doors and lock the vehicle, test for less than 0.3 V between control circuit terminal 1 of the appropriate inoperative accent light and ground after 5 s.
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7. |
If greater than the specified value, test the circuit for a short to voltage. If all circuits test normal, replace the K9 Body Control Module.
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8. |
Unlock the vehicle.
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9. |
Open the driver door.
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10. |
Test for greater than 11 V between control circuit terminal 1 of the appropriate inoperative accent light and ground.
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11. |
If less than the specified value, test the circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the K9 Body Control Module.
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12. |
If all circuits test normal, test or replace the appropriate inoperative accent light.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for information on BCM replacement, setup, and programming