The AHLS(Auto Headlamp Leveling System) ECU sets DTC C1255 if height sensor operation range is exceeded ±45˚ caused by separation of actuator clamping bolt or lifting of vehicle.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Check angle of the height sensor. | 1. Foor Connection 2. Damaged Wiring 3. AHLS ECU 4. Mechanical Damage |
Enable Conditions |
•
IG KEY ON. | |
Threshold Value |
•
Height sensor's range over 45° or under -45°. | |
Detecting Time |
•
2 ±0.4 Sec. |
∴ Degree of the height sensor is measured from 6 O'clock direction to 9 O'clock direction.
(6 O'clock direction = 0°, 9 O'clock direction = 90° / Normal Range = 0 ~ 90°)
