General Information

Auto Headlamp Leveling System
C1621 EXCESSIVE OPERATING TEMP. - General Information

Component Location





General Description

AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of ECM, Linkage and actuator. The AHLS ECU which is mounted in rear wheel suspension detects the change of vehicle vertical location and control actuator (which changes the vertical direction of the head lamp) based on the driving and load condition. The EEPROM is equipped with a temperature sensor which is used to avoid damage related to overtemperature.

DTC Description

The AHLS ECU sets DTC C1621 if measured temperature at temperature sensor in EEPROM is over 120 °C (248 °F) for 2 seconds.

DTC Detecting Condition