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 B1010 52: System Sensors Data MismatchDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Headlamp Leveling Module B+ | 1 | 1 | -- | -- |
Suspension Position Sensor - Front Voltage Reference | B3410 02, 2 | B3410 03, 2 | B3410 07, 2 | -- |
Suspension Position Sensor - Rear Voltage Reference | B3420 02, 3 | B3420 03, 3 | B3420 07, 3 | -- |
Suspension Position Sensor - Front Signal | B3410 02, 2 | B3410 03, 2 | B3410 07, 2 | -- |
Suspension Position Sensor - Rear Signal | B3420 02, 3 | B3420 03, 3 | B3420 07, 3 | -- |
Headlamp Leveling Motor (1) Control - Left | B2667 02 | B2667 05 | B2667 05 | -- |
Headlamp Leveling Motor (2) Control - Left | B2672 02 | B2672 05 | B2672 05 | -- |
Headlamp Leveling Motor (3) Control - Left | B1457 02 | B1457 05 | B1457 05 | -- |
Headlamp Leveling Motor (4) Control - Left | B1458 02 | B1458 05 | B1458 05 | -- |
Headlamp Leveling Motor (1) Control - Right | B2677 02 | B2677 05 | B2677 05 | -- |
Headlamp Leveling Motor (2) Control - Right | B2682 02 | B2682 05 | B2682 05 | -- |
Headlamp Leveling Motor (3) Control - Right | B1459 02 | B1459 05 | B1459 05 | -- |
Headlamp Leveling Motor (4) Control - Right | B1460 02 | B1460 05 | B1460 05 | -- |
Headlamp Leveling Motor - Left Low Reference | -- | 1 | -- | -- |
Headlamp Leveling Motor - Right Low Reference | -- | 1 | -- | -- |
Headlamp Leveling Actuator - Left Ground | -- | 1 | -- | -- |
Headlamp Leveling Actuator - Right Ground | -- | 1 | -- | -- |
Headlamp Leveling Module Ground | -- | 1 | -- | -- |
Suspension Position Sensor - Front Low Reference | -- | 2 | -- | -- |
Suspension Position Sensor - Rear Low Reference | -- | 3 | -- | -- |
1. Headlamp Leveling Malfunction 2. Suspension Position Sensor Malfunction - Front 3. Suspension Position Sensor Malfunction - Rear | ||||
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
Important: 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
Connector End View Reference
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the front headlamp leveling suspension position sensor arm from the ball and socket.
- 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.
- Connect the front headlamp leveling suspension position sensor arm to the ball and socket
- Ignition OFF, disconnect the rear headlamp leveling suspension position sensor arm from the ball and socket.
- 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 all circuits test normal, replace the headlamp leveling module.
| ⇒ | If the reading does not change, replace the front suspension position sensor. |
| ⇒ | If the reading does not change, replace the rear suspension position sensor. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for headlamp leveling module replacement, setup, and programming |
