AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. AHLS ECU ouputs the singal based on the driving and loading condition and delivers it to actuator, and then the actuator changes vertical direction of the headlamp.
AHLS ECU sets DTC C2226 If AHLS ECU detects Signal circuit of Actuator is short to ground or battery.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Poor connection 2. Short circuit to chasis ground and battery 3. Faulty AHLS ECU |
Detecting mode |
•
IG KEY ON, ENGINE ON, HEAD LAMP ON | |
Threshold Value |
•
Short to Battery AND Short to GND | |
Detecting time |
•
300ms. | |
Fail Safe |
•
Error detected during power-up : Return to normal conditions
•
Error detected during normal operation : maintain the current status - None of the AHLS's output(OFF) |
