System Description [03/2019 - ]

WARNING: This page is about a different car, the 2024 Lexus RC F, 2023 Lexus RC F, 2022 Lexus RC F, 2021 Lexus RC F, and 2020 Lexus RC F. However, it is still accessible from the selected car via links, so may be relevant.

AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL

General
The automatic headlight beam level control system ensures forward visibility and prevents dazzling of drivers in oncoming and preceding vehicles by controlling the headlight beam level vertically when the weight of passengers and loads has caused the vehicle attitude to change.

Function of Main Components

Component	Outline
Headlight ECU Sub-assembly LH and RH	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 ECU sub-assembly LH or RH, the motors move the reflectors in the headlight to change the low beam angle.
Rear Height Control Sensor Sub-assembly	Transmits a height control sensor signal to the headlight ECU sub-assembly LH.
Brake Actuator Assembly (Skid Control ECU)	Transmits a speed sensor signal to the headlight ECU sub-assembly LH.
Main Body ECU (Multiplex Network Body ECU)	Transmits a headlight status signal to the headlight ECU sub-assembly LH.
Combination Meter Assembly	If the system malfunctions, "Headlight System Malfunction Visit Your Dealer" warning message will be displayed on the multi-information display in the combination meter assembly in accordance with the signal from the headlight ECU sub-assembly LH.