AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of ECM, Linkage and actuator. ECM detects the signal of headlamp switch which is operated by multi-function switch to diagnose the Headlamp light singal line.
AHLS ECM sets DTC C1522 if AHLS ECM detects HEAD Lamp signal circuit is open.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Poor connection 2. Open circuit in H/Lamp switch signal 3. Faulty AHLS ECU |
Enable Conditions |
•
IG KEY ON, ENGINE ON, HEAD LAMP ON. | |
Threshold Value |
•
2V < Signal Voltage＜ 6V | |
Detecting Time |
•
2 sec. |
