For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle

• | Review Strategy Based Diagnosis

• | Diagnostic Procedure Instructions

### DTC Descriptor

DTC B2615 02: Passenger Compartment Dimming 2 Circuit Short to Ground

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Courtesy Lamps Control | B2615 02 | 2 | 1 | --
1. Courtesy lamps always illuminated 2. Courtesy lamps do not illuminate

### Circuit/System Description

Battery voltage for the courtesy lamps is supplied at all times to the body control module (BCM). When the BCM receives a signal to command the courtesy lamps ON, it then applies voltage through the courtesy lamps control circuits to the courtesy lamps listed below.

• | Dome/reading lamps

• | Dome/Reading lamps - row

• | Accent lamp - left lower I/P

• | Accent lamp - right lower I/P

• | Accent lamp - driver seat

• | Accent lamp - passenger seat

• | Accent lamp - driver door handle

• | Accent lamp - passenger door handle

### Conditions for Running the DTC

The BCM attempts to illuminate the courtesy lamps.

### Conditions for Setting the DTC

The BCM detects a short to ground on the courtesy lamp control circuit.

### Action Taken When the DTC Sets

The BCM will not attempt to activate courtesy lamps.

### 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

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References

### Circuit/System Verification

Ignition ON, command the Courtesy Lamps test ON and OFF with a scan tool. The courtesy lamps should turn ON and OFF when changing between commanded states.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the appropriate inoperative backlighting component.
2. Test for less than 5 Ω between the black wire of the component and ground.

⇒ | If greater than the specified range, test the ground circuit for an open/high resistance.

3. Connect a test lamp between the control circuit of the component and ground.
4. Command the Courtesy Lamps Dimming ON and OFF with a scan tool.

⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance or replace the K9 Body Control Module (BCM).

⇒ | If the test lamp is always ON, test the control circuit for a short to voltage or replace the K9 Body Control Module (BCM).

5. If all circuit test normal, test or replace the appropriate inoperative component.

### Repair Instructions

Perform the Diagnostic Repair Verification

• | Dome Lamp Replacement

• | Reading Lamp Replacement

• | Front Floor Flood Lamp Replacement

• | Front Side Door Sill Courtesy Lamp Replacement

• | Rear Compartment Courtesy Lamp Replacement

• | Control Module References