System Description [06/2015 - ]
- AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL
- General
- This system maintains the low beam headlights at a constant level while the vehicle is stopping.
- This system is controlled by the headlight light control ECU sub-assembly. The headlight light control ECU sub-assembly detects the vehicle posture via the rear height control sensor sub-assembly, and detects the vehicle speed via the combination meter assembly. The headlight light control ECU sub-assembly controls each headlight leveling motor based on this information in order to change the headlight reflector angle.
NOTE:- A new headlight light control ECU sub-assembly LH cannot operate until it is initialized.
- Even if the headlight light control ECU sub-assembly RH is replaced with a new one, initialization is not necessary.
- Initialize the headlight light control ECU sub-assembly LH (set the zero point of the height control sensor in the headlight light control ECU sub-assembly LH) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly.
- Function of Main Components
Component Outline Headlight Light Control ECU Sub-assembly Receives various signals, calculates changes in the vehicle posture, and actuates the headlight leveling motor. Headlight Leveling Motor Based on the signals received from the headlight light control ECU sub-assembly, the motors move the reflectors in the headlight to vary the low beam. Rear Height Control Sensor Sub-assembly Transmits a height control sensor signal to the headlight light control ECU sub-assembly. Brake Booster with Master Cylinder Assembly Transmits speed sensor signals to the headlight light control ECU sub-assembly. EV Control ECU Transmits a READY condition signal to the headlight light control ECU sub-assembly. Main Body ECU (Multiplex Network Body ECU) Transmits a headlight status signal. Combination Meter Assembly When the system malfunctions, the combination meter assembly alerts the driver by flashing the headlight leveling warning light in accordance with the signal from the headlight light control ECU sub-assembly.
- General