B1010

DTC B1010

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 Descriptor
DTC B1010 52
- System Sensors Data Mismatch

Diagnostic Fault Information






Circuit/System Description

The front and rear suspension position sensors provide the headlamp control module with front and rear suspension position information. Each sensor receives a 5 V reference, signal, and low reference circuits from the headlamp control module. The sensor are connected to the control arms at the front and rear suspension. As the vehicle travels, the suspension compresses and rebounds moving the suspension position sensor arms. This causes the signal output of the sensors to change. The headlamp control module compares the information from the front and rear suspension position sensors and adjusts the headlamp leveling as needed.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.
* Ignition ON.
* Headlamps ON.

Conditions for Setting the DTC

The headlamp control module detects a pitch angle that is physically unachievable by the vehicle for 3 consecutive monitoring cycles.

Actions Taken When the DTC Sets

When DTC B1010 52 sets as current, the following actions are taken:

* If the headlamp leveling actuators have positioned the headlamps above the nominal level, the headlamp level controller will drive the headlamps to the nominal setting.
* If the headlamp leveling actuators have positioned the headlamps below the nominal level, the headlamp level controller will disable the headlamp leveling actuators and maintain the lower than nominal level.

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

Note: The headlamp control module is not capable of detecting an actual mechanical failure of the suspension position sensors. When the headlamp control module determines that the vehicle pitch angle is physically impossible, the headlamp control module will assume that a mechanical failure has occurred to one of the suspension position sensors.

Reference Information
Schematic Reference

Headlights/Daytime Running Lights (DRL) Schematics Headlights/Daytime Running Lights (DRL) Schematics
Connector End View Reference

Component Connector End Views Connector Views
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 Testing

1. Ignition OFF, disconnect the front headlamp leveling sensor arm from the ball and socket.
2. Ignition ON, headlamps ON, observe the appropriate scan tool Headlamp Control Module Motor Position Status parameter while moving the front headlamp leveling sensor arm up and down. The reading should change as the arm is moved.

• If the reading does not change, replace the front headlamp leveling sensor.

3. Connect the front headlamp leveling sensor arm to the ball and socket.
4. Ignition OFF, disconnect the rear headlamp leveling sensor arm from the ball and socket.
5. Ignition ON, headlamps ON, observe the appropriate scan tool Headlamp Control Module Motor Position Status parameter while moving the rear headlamp leveling sensor arm up and down. The reading should change as the arm is moved.

• If the reading does not change, replace the rear headlamp leveling sensor.

6. If all circuits test normal, replace the headlamp control module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Headlamp Leveling Front Suspension Height Sensor Replacement Headlamp Leveling Front Suspension Height Sensor Replacement
* Headlamp Leveling Rear Suspension Height Sensor Replacement Headlamp Leveling Rear Suspension Height Sensor Replacement
* Control Module References Control Module References for headlamp control module replacement, setup, and programming