B2575

DTC B2575 or B2699

Diagnostic Instructions

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

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

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B2575 00
- Left Headlamp Control Circuit Malfunction

DTC B2575 04
- Left Headlamp Control Circuit Open

DTC B2699 00
- Right Headlamp Control Circuit Malfunction

DTC B2699 04
- Right Headlamp Control Circuit Open

Circuit/System Description

The headlamp leveling control module calculates the headlamp angle and sends commands to the left and right adaptive forward lighting system headlamp actuators. The headlamp actuators drive the headlamps to the position commanded by the headlamp leveling control module. The headlamp leveling control module monitors the headlamp actuator motor control circuits for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory and the driver will be notified with a "Service AFL Lamp" message displayed over the driver information center located on the instrument cluster.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.

* Engine RUNNING.

* Headlamps ON.

Conditions for Setting the DTC

DTC B2575 00 and B2575 04

The headlamp leveling control module receives a serial data message from the left headlamp internal logic module that an internal headlamp malfunction has occurred.

DTC B2699 00 and B2699 04

The headlamp leveling control module receives a serial data message from the right headlamp internal logic module that an internal headlamp malfunction has occurred.

Actions Taken When the DTC Sets

* The headlamp leveling control module disables the AFL system.

* The driver information center (DIC) will display AFL Lamps Need Service.

* On vehicles equipped with both AFL and headlamp leveling, the headlamp leveling system will remain active.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear once 50 consecutive malfunction-free ignition cycles have occurred.

Diagnostic Aids

DTC B2575 and B2699 will set when there is an internal malfunction within the left or right headlamp assemblies. No parts are serviceable within the headlamp assemblies so complete headlamp assembly replacement is necessary.

Reference Information

Schematic Reference

Headlights/Daytime Running Lights (DRL) Schematics Headlights/Daytime Running Lights (DRL) Schematics

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Exterior Lighting Systems Description and Operation Exterior Lighting Systems

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON.

2. Verify DTC B2575 or B2699 is not set.

• If DTC B2575 or B2699 is set

1. Program the headlamp leveling control module.

2. Verify the DTC does not set.

• If the DTC sets, replace the appropriate headlamp assembly.

• If the DTC does not set

3. All OK.

• If DTC B2575 or B2699 is not set

3. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Headlamp Replacement Headlamp Replacement

* Control Module References Control Module References for Headlamp Leveling Control Module replacement, programming, and setup