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 Description
The suspension position sensors provide the headlamp level controller with front and rear suspension position information. The sensors are permanently grounded and have voltage supplied with the ignition in the ON or CRANK position. The sensors arms are connected to the control arms of the front and rear suspensions. As the vehicle travels, the suspension compresses and rebounds moving the suspension position sensors arm. This causes the signal output of the sensors to change. The headlamp level controller compares the information received from the front and rear suspension position sensors and adjusts the headlamp leveling as needed.
Conditions for Running the DTC
The headlamp level controller performs this diagnostic test mode every 51.2 milliseconds when the following conditions are met.
* The ignition is in the ON or CRANK position.
* The headlamps are ON.
Conditions for Setting the DTC
DTC B1010 will set when the headlamp level controller detects a pitch angle that is physically unachievable by the vehicle for 3 consecutive monitoring cycles.
Action Taken When the DTC Sets
When DTC B1010 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 40 consecutive malfunction free ignition cycles have occurred.
Diagnostic Aids
Note: The headlamp level controller is not capable of detecting an actual mechanical failure of the suspension position sensors. When the headlamp level controller determines that the vehicle pitch angle is physically impossible, the headlamp level controller 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 End Views By Name)
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 (Programming and Relearning) for scan tool information
Circuit/System Testing
1. Ignition OFF, disconnect the front headlamp leveling suspension position sensor arm from the ball and socket.
2. Ignition ON, observe the scan tool Front Leveling Position Sensor parameter while moving the front suspension position sensor up and down. The reading should change as the arm is moved.
• If the reading does not change, replace the front suspension position sensor.
3. Connect the front headlamp leveling suspension position sensor arm to the ball and socket.
4. Ignition OFF, disconnect the rear headlamp leveling suspension position sensor arm from the ball and socket.
5. Ignition ON, observe the scan tool Rear Leveling Position Sensor parameter while moving the rear suspension position sensor up and down. The reading should change as the arm is moved.
• If the reading does not change, replace the rear suspension position sensor.
6. If all circuits test normal, replace the headlamp leveling 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 (Programming and Relearning) for headlamp leveling module replacement, setup, and programming