AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and Headlamp actuator. AHLS ECU is composed of many IC components, such as A/D(AD converter), EEPROM, ROM, RAM and others.It also contains several different parameter-sets which defines the behavior in different car types and respect different mounting places. For efficient operation of system, The internal components of AHLS ECU(A/D, EEPROM, ROM, RAM) are checked internally during every start-up sequence.
The AHLS ECU sets DTC C1606 if the parameter-sets are incompletely coded.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
ECM internal component monitoring. | 1. Selecting Invaid vehicle model 2. Faulty AHLS ECU |
Detecting mode |
•
Engine "ON" and Head lamp "ON" | |
Threshold Value |
•
Detected Initialized status | |
Detecting time |
•
Fault immediately | |
Fail Safe |
•
Available to communication
•
Actuator fixed to the current position (AHLS OFF) |
