AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM SYSTEM DESCRIPTION


  1. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM


    1. General


      • This system maintains the low beam headlights at a constant level while the vehicle is stopping.

      • This system is controlled by the headlight leveling ECU assembly. The headlight leveling ECU 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 leveling ECU assembly controls each headlight leveling motor based on this of information in order to change the headlight reflector angle.

      Note


      • Initialize the rear height control sensor sub-assembly signal after the vehicle height changes due to replacement of suspension components or after operations such as reinstallation or replacement of the rear height control sensor sub-assembly.

      • When the headlight leveling ECU assembly is replaced, initialization is also necessary.

    2. Function of Main Components

      Component Outline
      Rear Height Control Sensor Sub-assembly Detects vehicle height.
      Combination Meter Assembly

      • Outputs the vehicle speed signal to the headlight leveling ECU assembly.

      • If this system malfunctions, the combination meter assembly alerts the driver by displaying "Check Headlight System" on the multi-information display in accordance with the signal from the headlight leveling ECU assembly.*1

      • If this system malfunctions, the combination meter assembly alerts the driver by displaying "Check Headlight Leveling System" on the multi-information display in accordance with the signal from the headlight leveling ECU assembly.*2
      Headlight Leveling Motor Based on the signals received from the headlight leveling ECU assembly, each motor moves the reflector in the headlight to change its low beam angle.
      Headlight Leveling ECU Assembly

      • Based on the signals that are transmitted by the rear height control sensor sub-assembly and combination meter assembly, the headlight leveling ECU assembly detects the amount of variance in the vehicle posture while the vehicle is stopping.

      • Based on the detected value, the headlight leveling ECU assembly outputs control signals to the headlight leveling motor.

      • The headlight leveling ECU assembly sends signal to display "Check Headlight System" on the multi-information display to alert the driver when a malfunction in this system is detected.*1

      • The headlight leveling ECU assembly sends a signal to display "Check Headlight Leveling System" on the multi-information display to alert the driver when a malfunction in this system is detected.*2

      • *1: for TMC, TMMR Made

      • *2: for TMMK Made