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Home >> Lexus >> 2016 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Automatic Headlight Beam Level Control System (Single Beam Headlight) - Diagnostics - Introduction >> AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM (for Single Beam Headlight) >> System Description [09/2014 - 11/2017] >> System Description [09/2014 - 11/2017]
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System Description [09/2014 - 11/2017]

  1. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL 
    1. General

      When the low beam headlights are on, the automatic headlight beam level control operates the headlight leveling motor in accordance with movement of the vehicle. The headlight leveling ECU assembly controls the system.

    2. Function of Main Components
      Component Outline
      Headlight Leveling ECU 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 leveling ECU assembly, the motors move the reflectors in the headlight to change the low beam angle.
      Rear Height Control Sensor Sub-assembly LH Transmits a height control sensor signal to the headlight leveling ECU assembly.
      Brake Actuator Assembly (Skid Control ECU) Transmits a speed sensor signal to the headlight leveling ECU assembly.
      ECM Transmits an engine running status signal to the headlight leveling ECU assembly.
      Main Body ECU (Multiplex Network Body ECU) Transmits a headlight status signal.
      Combination Meter Assembly If the system malfunctions, the combination meter assembly alerts the driver by flashing the headlight leveling warning light and displaying "Check Headlight System" on the multi-information display in accordance with the signal from the headlight leveling ECU assembly.
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