PRE-RELEASE
DTC B2610
| DTC B2610 |
| 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 B2610 02
Passenger Compartment Dimming 1 Circuit Short to Ground
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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LED Interior Backlighting Control Terminal 8 X2
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B2610 02
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2
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1
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-
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LED Interior Backlighting Control Terminal 9 X7
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B2610 02
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2
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1
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-
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Backlighting Ground
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-
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2
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-
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-
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1. Interior backlighting at full Intensity and cannot be dimmed
2. Interior backlighting do not Illuminate |
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| 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 through the backlight lamp control circuit, and the LED dimming control circuit illuminating the LEDs and the components listed below, if equipped:
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Heated Seat Control Module - Driver
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Dome/Reading Lamps
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Dome/Reading Lamps - Row
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Sunroof Switch
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Sunroof Sunshade Switch
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Rear Window Sunshade Switch
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Sunroof Ventilation Switch
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Intrusion Sensor Defeat Switch
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Outside Rearview Mirror Switch
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Window Switch - Driver
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Rear Compartment Lid Release Switch - Interior
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Window Switch - Passenger
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Window Switch - Left Rear
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Window Switch - Right Rear
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Steering Wheel Control Switch
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Headlamp Switch
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Park Brake Control Switch
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Ignition Mode Switch
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Automatic Transmission Shift Lever
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Hazard Warning Switch
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Multifunction Switch - Instrument Panel 1
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Multifunction Switch - Instrument Panel 2
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Steering Wheel Controls Switch - Left
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Steering Wheel Controls Switch - Right
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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 LED backlight lamp control circuit.
| Action Taken When the DTC Sets |
The BCM will not dim or illuminate any LED backlighting supplied by the backlight lamp control circuits.
| 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 Dimming 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 |
Ignition ON, command the LED Backlight Dimming test with a scan tool. The illumination should be ON/OFF.
| Circuit/System Testing |
| 1. |
Ignition OFF, interior light switched OFF, disconnect the harness connectors at the appropriate inoperative backlighting component.
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| 2. |
Test for less than 5 Ω between the black wire of the appropriate component and ground.
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| 3. |
If greater than the specified range, test the ground circuit for an open/high resistance.
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Connect a test lamp between the yellow wire of the appropriate component and ground.
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| 5. |
Command with the scan tool the LED Backlight Dimming test the illumination ON/OFF.
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| 6. |
If the test lamp cannot be dimmed test the control circuit for a short to voltage or replace the K9 Body Control Module.
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If the test lamp do not emit at all test the control circuit for open/high resistance or replace the K9 Body Control Module.
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| 8. |
If all circuit test normal, test or replace the appropriate inoperative backlighting component.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Dome and Reading Lamp Replacement
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Sunroof Switch Replacement
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Outside Remote Control Rearview Mirror Switch Replacement
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Front Side Door Window Switch Replacement
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Rear Side Door Window Switch Replacement
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Rear Compartment Lid Release Switch Replacement
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Steering Wheel Inflatable Restraint Module Replacement
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Headlamp Switch Replacement
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Hazard Warning Switch Replacement
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Body Control Module Replacement (Right Hand Drive)
Body Control Module Replacement (Left Hand Drive)
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Control Module References
for BCM, HVAC control module, and radio replacement, setup, and programming
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