For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provides an overview of each diagnostic category.

### DTC Descriptor

DTC B2652 02 : Inadvertent Load Circuit Low Voltage

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Inadvertent Courtesy Lamp Control | B2652 02 | 1 | 1 | --
Dome Lamp Ground | -- | 1 | -- | --
Vanity Mirror Lamp - Right Ground | -- | 1 | -- | --
Vanity Mirror Lamp - Left Ground | -- | 1 | -- | --
1. Courtesy Lamps Malfunction

### Circuit/System Description

The rear electrical center (REC) applies battery voltage to the dome lamp and the left and right vanity mirrors through the inadvertent courtesy lamp control circuit. In the event that any of these lamps were to remain illuminated for more than 20 minutes with the ignition switch in the OFF position, the REC will deactivate the inadvertent courtesy lamp control circuit to prevent a total battery discharge condition.

### Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

### Conditions for Setting the DTC

DTC B2652 02 will set when the REC detects a short to ground in the inadvertent courtesy lamp control circuit.

### Actions Taken When the DTC Sets

The REC will disable the inadvertent courtesy lamp control circuit.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists.

• | A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

### 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

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the following components.

• | Dome lamp

• | Vanity mirror - left

• | Vanity mirror - right

2. Ignition ON, verify a test lamp illuminates between the control circuit terminals listed below and ground.

• | Dome lamp terminal 6 - uplevel

• | Dome lamp terminal 2 - standard

• | Vanity mirror terminal A - left

• | Vanity mirror terminal A - right

⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the REC.

3. Connect each component one at a time and verify with a scan tool if the DTC resets as current.
4. If the DTC resets, test or replace the inoperative component.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Sunshade Replacement

• | Dome Lamp Replacement

• | Overhead Console Reading Lamp and Bulb Replacement

• | Control Module References for REC replacement, setup, and programming