LIGHTING SYSTEM


  1. FUNCTION OF MAIN COMPONENTS


    1. Daytime Running Light System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and illuminates the daytime running lights*1 or LED daytime running lights*2.
      Headlight Dimmer Switch Assembly Light Control Switch Outputs a light control position signal and transmits it to the main body ECU (multiplex network body ECU).
      ECM Outputs an engine speed signal and transmits it to the main body ECU (multiplex network body ECU).

      *1: for halogen headlight and projector headlight

      *2: for projector headlight w/ LED daytime running light / LED clearance light

    2. Automatic Light Control System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and illuminates the headlights, taillights, clearance lights and license plate lights.
      Headlight Dimmer Switch Assembly Light Control Switch Transmits an AUTO position signal to the main body ECU (multiplex network body ECU).
      Automatic Light Control Sensor Detects the ambient light level.

    3. Light Automatic Turn-off System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals, and turns off the exterior lights.
      Front Door Courtesy Light Switch Assembly (for Driver) Detects whether driver's door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).
      Headlight Dimmer Switch Assembly Light Control Switch Transmits a light control position signal to the main body ECU (multiplex network body ECU).

    4. Follow Me Home System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Receives various signals and illuminates the low beams.
      Headlight Dimmer Switch Assembly Dimmer Switch Transmits a flash headlight signal to the main body ECU (multiplex network body ECU).

    5. Light Reminder System

      Component Function
      Main Body ECU (Multiplex Network Body ECU) Outputs taillight illumination signals and driver's door open signals to the combination meter assembly.
      Front Door Courtesy Light Switch Assembly (for Driver) Detects whether driver's door is open or closed and transmits a signal to the main body ECU (multiplex network body ECU).
      Combination Meter Assembly Receives taillight illumination signals and driver's door open signals from the main body ECU (multiplex network body ECU) when the ignition switch is turned off, and sounds the buzzer.

    6. Manual Headlight Beam Level Control System

      Component Function
      Headlight Leveling Switch The level of the headlight can be adjusted between 0 and 5, and a switch level status signal is sent to the headlight leveling motor.
      Headlight Leveling Motor Headlight leveling motors in accordance with signals from the headlight leveling switch and moves the reflector*1 / projector*2 up and down.

      *1: for halogen headlight

      *2: for projector headlight

    7. Automatic High Beam System (Models with Toyota Safety Sense)

      Component Function
      Pre-crash Safety City Sensor (Monocular Camera Sensor)

      • The pre-crash safety city sensor determines when to turn the high beams on and off after identifying the lights of oncoming vehicles, preceding vehicles and other lights from the picture information of its monocular camera sensor. Then, the sensor sends high beam request signals to the main body ECU (multiplex network body ECU).

      • Transmits an operation signal to the pre-crash safety city heater via the pre-crash safety city heater relay.*
      Pre-crash Safety City Heater* Heats the heater pattern area in accordance with the signals from the pre-crash safety city sensor.
      Main Body ECU (Multiplex Network Body ECU)

      • The main body ECU receives the signals from the headlight dimmer switch assembly and the automatic light control sensor and the auto high beam switch..

      • The main body ECU operates the high beams based on request signals that are received from the pre-crash safety city sensor.

      • The main body ECU transmits the signals to the combination meter assembly.
      Airbag Sensor Assembly Yaw Rate and Acceleration Sensor Detects the yaw rate of the vehicle and transmits the signal to the pre-crash safety city sensor.
      Brake Actuator Assembly Skid Control ECU Transmits the speed sensor signal to the pre-crash safety city sensor.
      ECM Transmits the shift position signal to the pre-crash safety city sensor.
      Combination Meter Assembly Automatic High Beam Indicator Light

      • The automatic high beam indicator light illuminates (green) to inform the driver when the Automatic High Beam system is activated.

      • The automatic high beam indicator light illuminates (yellow) to inform the driver when a malfunction is detected in this system.
      Headlight High Beam Indicator Light The headlight high beam indicator light illuminates (blue) to inform the driver when the high beam headlights are on.
      Automatic Light Control Sensor The automatic light control sensor detects the ambient light level and transmits a signal to the main body ECU (multiplex network body ECU).
      Auto High Beam Switch The auto high beam switch outputs the switch on signal to the main body ECU (multiplex network body ECU).
      Headlight Dimmer Switch Assembly The headlight dimmer switch assembly transmits the light control switch and dimmer switch signal to the main body ECU (multiplex network body ECU).

      *: Models with pre-crash safety city heater

  2. OPERATING CONDITION


    1. Daytime Running Light System


      1. The daytime running light system is enabled when the conditions given below are met:

        Condition Ignition switch is ON.
        Light control switch off or AUTO position (when taillight is not being controlled by the automatic light control).
        Engine is running.

    2. Follow Me Home System


      1. The follow me home system is enabled when the conditions given below are met:

        Condition Ignition switch is off.
        Light control switch off or AUTO position.
        Dimmer switch is pulled to flash headlights once.

    3. Automatic High Beam System (Models with Toyota Safety Sense)


      1. The automatic high beam system operates as follows:

        Function Operation Condition
        Active

        When all of the following conditions are met, the automatic high beam system is activated and the automatic high beam indicator light turns on:


        • The ignition switch is ON.

        • The headlight dimmer switch assembly (light control switch) is in the AUTO position or head position and the low beam headlights are on.

        • The headlight dimmer switch assembly (dimmer switch) is in the high beam position.

        • The auto high beam switch is ON.

        • The shift lever is in any position other than R.
        High Beams on

        When all of the following conditions are met, the automatic high beam system turns on the high beams after a short delay:


        • Vehicle speed is more than approximately 40 km/h (25 mph).

        • The area in front of the vehicle is dark.

        • No oncoming vehicles are present with the headlights on.

        • No preceding vehicles are present with the taillights on.

        • Few streetlights are present along the street ahead.
        High Beams off

        When any of the following conditions is met, the automatic high beam system turns off the high beams after a short delay:


        • Vehicle speed is less than approximately 30 km/h (19 mph).

        • The area in front of the vehicle is not dark.

        • An oncoming vehicle with headlights on is detected.

        • A preceding vehicle with taillights on is detected.

        • Several streetlights are present along the street ahead.

  3. FUNCTION


    1. Light Automatic Turn-off System


      1. When the ignition switch is turned off while the light control switch (TAIL or HEAD) is turned on, the headlights and fog light are turned off automatically. When the ignition switch is turned off while the light control switch is in the AUTO position, all lights are turned off automatically.

        Light control switch position Outline
        AUTO While the lights (headlights, front fog lights, rear fog light and taillights) are turned on, this system automatically turns them off when the ignition switch is turned off.
        HEAD While the lights (headlights, front fog lights, rear fog light and taillights) are turned on, this system automatically turns off only the headlights and the front fog lights when the ignition switch is turned off.
        TAIL

      2. After the light automatic turn-off system was activated, when the ignition switch is shifted from ON to off while the light control switch (HEAD) is turned on or is in the AUTO position, the battery saving function turns off the headlights and taillights automatically in approximately 20 minutes. In addition, when one of the doors is opened from the closed status or closed from the opened status, the accumulated time is reset and the lights turn off in approximately 20 minutes after the door was opened/closed.

      3. The light automatic turn-off system is controlled by the main body ECU (multiplex network body ECU).

    2. Light Reminder System


      1. The light reminder system warns the driver using a buzzer when the meter ECU inside the combination meter assembly receives the driver's door courtesy light switch signal via the main body ECU (multiplex network body ECU) and the ignition switch is turned off and the door is opened with the taillights kept on. The buzzer is located inside the combination meter assembly.

        Light Control Switch Position Ignition Switch Door Buzzer
        TAIL, HEAD Switch off Open Sounds
        Closed -

    3. Manual Headlight Beam Level Control System


      1. The manual headlight beam level control system keeps the beam of the headlight adjusted. to the appropriate level in accordance with the number (weight) of passengers and volume of luggage.

      2. The headlight beam level can be adjusted from 0 to 5 by operating the headlight leveling switch.

        A004537E02
        Text in Illustration
        *1 Headlight Leveling Switch - -

    4. Automatic High Beam System (Models with Toyota Safety Sense)


      1. When passing an oncoming vehicle:


        • The automatic high beam system turns off the high beams before an oncoming vehicle comes within approximately 800 m (2625 ft.).

        • When an oncoming vehicle passes out of pre-crash safety city sensor (monocular camera sensor) range, the automatic high beam system turns the high beams on after a short delay.

        A0044LVE16
        Text in Illustration
        *a Approx. 800 m (2625 ft.) *b Delay
        *c Monocular Camera Sensor Angle - -

        Tech Tips


        • The detection distance varies depending on detected objects.

        • The timing of turning on and off the high beams varies depending on the intensity of oncoming (and preceding) vehicle lights.

      2. When passing a preceding vehicle:


        • When approaching a preceding vehicle, the automatic high beam system turns off the high beams approximately 600 m (1968 ft.) before reaching it.

        • When a preceding vehicle passes out of pre-crash safety city sensor (monocular camera sensor) range, the automatic high beam system turns the high beams on after a short delay.

        A0044T4E03
        Text in Illustration
        *a Approx. 600 m (1968 ft.) *b Delay
        *c Monocular Camera Sensor Angle - -

        Tech Tips


        • The timing of turning on and off the high beams varies depending on the intensity of the preceding vehicle lights.

  4. CONSTRUCTION


    1. Automatic High Beam System (Models with Toyota Safety Sense)


      1. Pre-crash Safety City Sensor (Monocular Camera Sensor)


        • The pre-crash safety city sensor (monocular camera sensor) consists of a Complementary Metal Oxide Semiconductor (CMOS) camera that receives images and the mirror portion that identifies light sources and judges whether to use high beams or low beams.

        A004518E02
        Text in Illustration
        *1 Pre-crash Safety City Sensor - -
        *a Monocular Camera Sensor - -

      2. Pre-crash Safety City Heater (Models with Pre-crash Safety City Heater)


        • The pre-collision city heater, which is installed between the pre-crash safety city sensor and windshield glass, is heated according to signals from the pre-crash safety city sensor in order to prevent the windshield glass on the front of the pre-crash safety city sensor from fogging, and also to remove fog buildup.