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 Sensor 5 Volt Reference - Front | B3410 02, 1 | B3410 02, 1 | B3410 01, 1 | -- |
Headlamp Leveling Sensor 5 Volt Reference - Rear | B3420 02, 1 | B3420 02, 1 | B3420 01, 1 | -- |
Headlamp Leveling Sensor Signal - Front | B3410 03, 1 | B3410 03, 1 | B3410 07, 1 | B1010 52 |
Headlamp Leveling Sensor Signal - Rear | B3420 03, 1 | B3420 03, 1 | B3420 07, 1 | B1010 52 |
Headlamp Leveling Motor Control Circuit 1 - Left | B3435 02 | B3435 00 | B3435 00 | B3435 39, B3435 54 |
Headlamp Leveling Motor Control Circuit 2 - Left | B3435 02 | B3435 00 | B3435 00 | B3435 39, B3435 54 |
Headlamp Leveling Motor Control Circuit 3 - Left | B3435 02 | B3435 00 | B3435 00 | B3435 39, B3435 54 |
Headlamp Leveling Motor Control Circuit 4 - Left | B3435 02 | B3435 00 | B3435 00 | B3435 39, B3435 54 |
Headlamp Leveling Motor Control Circuit 1 - Right | B3440 02 | B3440 00 | B3440 00 | B3440 39, B3440 54 |
Headlamp Leveling Motor Control Circuit 2 - Right | B3440 02 | B3440 00 | B3440 00 | B3440 39, B3440 54 |
Headlamp Leveling Motor Control Circuit 3 - Right | B3440 02 | B3440 00 | B3440 00 | B3440 39, B3440 54 |
Headlamp Leveling Motor Control Circuit 4 - Right | B3440 02 | B3440 00 | B3440 00 | B3440 39, B3440 54 |
Headlamp Leveling Sensor Low Reference - Front | -- | 1 | -- | -- |
Headlamp Leveling Sensor Low Reference - Rear | -- | 1 | -- | -- |
1. Headlamp Leveling Malfunction | ||||
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-volt 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 volts. |
| • | Ignition ON. |
| • | Headlamps ON. |
Conditions for Setting the DTC
B1010 52 will set when the headlamp control module 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 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
Important: 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
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 sensor arm from the ball and socket.
- Ignition ON, headlamps ON, observe the scan tool Front Leveling Position Sensor parameter while moving the front headlamp leveling sensor arm up and down. The reading should change as the arm is moved.
- Connect the front headlamp leveling sensor arm to the ball and socket.
- Ignition OFF, disconnect the rear headlamp leveling sensor arm from the ball and socket.
- Ignition ON, headlamps ON, observe the scan tool Rear Leveling Position Sensor parameter while moving the rear headlamp leveling sensor arm up and down. The reading should change as the arm is moved.
- If all circuits test normal, replace the headlamp control module.
| ⇒ | If the reading does not change, replace the front headlamp leveling sensor. |
| ⇒ | If the reading does not change, replace the rear headlamp leveling sensor. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for headlamp control module replacement, setup, and programming |
