AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of ECM, Linkage and actuator. The height sensor measures the angular displacement of lever by measuring the magnetic field of stator parts formed by rotation of rotor.
If the height sensor has an open or short to ground or battery in its signal circuit, the AHLS-ECM sets DTC C1255.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check Voltage |
•
Sensor Siganl circuit open.
•
Sensor Siganl circuit short to ground or battery.
•
Check if a fixing bolt of the actuator is well fastened up.
•
Faulty Sensor |
Enable Conditions |
•
IG KEY ON | |
Threshold Value |
•
When the signal voltage of the height sensor keeps lower than 0.2V or higher than 4.7V | |
Detecting time |
•
1 Sec |
