General Description
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. The AHLS ECU detects the vehicle speed to use it as a compensation factor for the actuator control. In other words, when the vehicle speed is low the actuator needs to respond slowly though the linkage of height sensor moves quickly (response filter value is high). But when the vehicle speed is high, AHLS ECU operates the actuator quickly in proportion to the height sensor variation.
DTC Description
The ECM sets DTC C1212 if the speed signal line carries a higher frequency than defined maximum value (approx. 180Hz) for 1.5 ± 0.5 seconds.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. The height sensor measures the angular displacement of lever by measuring the magnetic field of stator parts formed by rotation of rotor.
The AHLS ECU sets DTC C1255 if the usable range of ± 45° is overridden caused by separation of actuator clamping bolt or lifting of vehicle.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. The height sensor measures the angular displacement of lever by measuring the magnetic field of stator parts formed by rotation of rotor.
To set the value of the initial position sensor, must be set the position between Magnet and Hall sensor. Otherwise it detects the DTC C1258.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. The height sensor measures the angular displacement of lever by measuring the magnetic field of stator parts formed by rotation of rotor.
AHLS ECM sets DTC C1367 if AHLS ECU detects no signal changes inside of axle (height) sensor while vehicle is driving over 30 km/h for 5 min.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. The height sensor measures the angular displacement of lever by measuring the magnetic field of stator parts formed by rotation of rotor.
The Hall sensor transfers to the MCU an angle of present sensor in the AHLS system. If there are communication error or wrong signals, it sets the DTC C1381.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. AHLS ECU detects the signal of headlamp switch which is operated by multi-function switch to diagnose the Headlamp light signal line.
AHLS ECM sets DTC C1522 if AHLS ECU detects HEAD Lamp signal circuit is open.
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 C1604 if one of component self-test result is negative.
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.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. To ensure an optimum operation of the system, The AHLS (Auto Head Lamp Levelling System) has to be adjusted at end-of line procedure. The mechanical basic setting of the headlamps is to be performed with ignition being switched ON. It is important to adjust the system electronically and mechanically at the same place. Only by this way it is guaranteed that the car is in the same suspension condition.
The AHLS ECU sets DTC C1620 if the headlamp leveling system has not been adjusted since installation.
AHLS provides driver with the best visibility by adjusting vertical direction of the headlamp. It consists of AHLS ECU, Linkage and actuator. AHLS ECU outputs the signal 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.