B1010
DTC B1010
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. For more detailed information concerning headlamp leveling operation, refer to Exterior Lighting Systems Description and Operation.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B1010 System Sensors Data Mismatch
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 bellow 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.
- You issue a scan tool CLEAR DTCs command.
- 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.
Thoroughly inspect the wiring and connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis causing part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
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