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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System (W/ AFS) - Diagnostics - Introduction (1 Of 2) >> LIGHTING SYSTEM (w/ AFS) >> Operation Check [11/2023 - ] >> Operation Check [11/2023 - ]

Operation Check [11/2023 - ]

  1. AUTOMATIC LIGHT CONTROL SYSTEM OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the automatic light control system operation check.

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. Turn the ignition switch to ON.
    2. Turn the light control switch to the AUTO position.
    3. Cover the automatic light control sensor.
    4. Check that the taillights and low beam headlights come on.
    5. Uncover the automatic light control sensor.
    6. Check that the low beam headlights and taillights turn off.
  2. LIGHT AUTO TURN-OFF SYSTEM OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the light auto turn-off system operation check.

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. When the taillights are on (low beam headlights are not on)
      1. Close all of the doors.
      2. Turn the ignition switch to ON.
      3. Turn the taillights on.
      4. Turn the ignition switch off.
      5. Open the driver door.
      6. Check that all of the lights turn off immediately.
    2. When the low beam headlights are on
      1. Close all of the doors.
      2. Turn the ignition switch to ON.
      3. Turn the low beam headlights on.
      4. Turn the ignition switch off.
      5. Open any of the doors.
      6. Close the door.
      7. Check that all of the lights turn off after 30 seconds (delay function).

        HINT: 

        Before the lights turn off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will turn off immediately.

  3. DAYTIME RUNNING LIGHT SYSTEM OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the daytime running light system operation check.*

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    *: for vehicles with customize setting "DRL Function"

    1. Turn the ignition switch to ON (READY).*1
    2. Start the engine.*2
    3. Turn the light control switch to the tail or AUTO position (with the low beam headlights not turned on via the automatic light control system).
    4. Release the parking brake.
    5. Check that the daytime running lights come on.
    1. *1: for HV Model
    2. *2: for Gasoline Model
  4. WIPER-LINKED LOW BEAM HEADLIGHT CONTROL SYSTEM OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the wiper-linked low beam headlight control system operation check.

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. Turn the ignition switch to ON.
    2. Shine a light on the automatic light control sensor.*

      HINT: 

      *: If troubleshooting is being performed in a bright area, such as outside on a sunny day, it will not be necessary to perform this step.

    3. Turn the light control switch to the AUTO position.
    4. Operate the front wipers for 10 seconds or more (except MIST or washer-linked wiper operation) and check that the low beam headlights*1 or high beam headlights*2 illuminate.
      1. *1: Dimmer switch not high position
      2. *2: Dimmer switch high position
  5. WELCOME LIGHT ILLUMINATION CONTROL OPERATION CHECK 
    NOTE:
    • When operation of the alarm memory function is requested, welcome light illumination control will not operate.
    • Make sure that the customize settings are set to default when performing the welcome light illumination control operation check.

      Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. Turn the ignition switch off.
    2. Turn the light control switch to the AUTO position.
    3. Cover the automatic light control sensor.
    4. Close and lock all of the doors.
    5. Unlock all of the doors using the wireless door unlock or entry door unlock function.
    6. Check that the taillights, parking lights, side marker lights and license plate lights illuminate for 15 seconds.
  6. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM OPERATION CHECK 
    1. Stop the vehicle on a level surface and keep the vehicle height unchanged.
    2. Turn the ignition switch to ON (READY).*1
    3. Start the engine.*2
    4. Check that the headlight swivel and leveling motors operate.
    1. *1: for HV Model
    2. *2: for Gasoline Model
  7. DOOR MIRROR FOOT LIGHT CONTROL OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the door mirror foot light control operation check.

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. The operation and condition of this control are described below.
      Operation Condition
      Fade in and illuminate constantly When any of the following conditions is met, the lights fade in and illuminate constantly:
      • A key is detected in the actuation area.
      • Any door is unlocked when the ignition switch is off and all of the doors are closed.
      Illuminate for 15 seconds, and then fade out When any of the following conditions is met, the lights illuminate for 15 seconds, and then fade out:
      • An actuation area-linked function is used.*
      • Any door is unlocked when the ignition switch is off and all of the doors are closed.
      Fade out immediately When the following condition is met, the lights fade out immediately:
      • The ignition switch is turned from off to ON.
      • A key is not detected in the actuation area.
      • All doors are locked when all doors are closed and any door is unlocked.

      HINT: 

      *: When the lights are on, the lights fade out approximately 3 seconds after the key leaves the actuation areas around the doors.

  8. AFS OPERATION CHECK 
    NOTE:

    Make sure that the customize settings are set to default when performing the AFS operation check.

    Refer to CUSTOMIZE PARAMETERS [11/2023 - ] 

    1. Perform the following operation with the low beam headlights on and check that the headlight ECU sub-assembly LH performs low speed control of the AFS:
      • Drive the vehicle at a speed between 10 km/h (6 mph) and 30 km/h (19 mph) and turn the steering wheel 6 degrees or more.
    2. Perform the following operation with the low beam headlights on and check that the headlight ECU sub-assembly LH performs medium-to-high speed control of the AFS:
      • Drive the vehicle at a speed of 30 km/h (19 mph) or more and turn the steering wheel 7.5 degrees or more.
    3. Perform any of the following operations and check that the headlight ECU sub-assembly LH cancels control of the AFS:
      • Stop the engine.
      • Turn the low beam headlights off.
      • Decrease the vehicle speed to less than 5 km/h (3 mph).
      • Reduce the steering angle to less than 6 degrees.
      • Move the shift lever to N or R.
  9. AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK 
    GTY742520Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Automatic High Beam Indicator Light on Combination Meter Assembly
    *b Auto High Beam Switch Indicator
    1. Check the operation of the automatic high beam indicator light.
      1. Turn the ignition switch to ON.
      2. Turn the light control switch to the AUTO or head position.
      3. Move the dimmer switch to the low position.
      4. Press the auto high beam switch (indicator illuminates).

        HINT: 

        If the auto high beam switch is turned on when the light control switch is not in the AUTO or head position, or the dimmer switch is not in the high position, "To Activate Automatic High Beam, Switch Headlights to High Beam" will be displayed on the multi-information display.

      5. Check that the automatic high beam indicator illuminates.
        NOTE:

        If the forward recognition camera cannot correctly recognize the view ahead due to bad weather (dense fog, etc.) or if dirt, etc., is obstructing the windshield glass, the automatic high beam indicator in the combination meter assembly may not illuminate and the automatic high beam system may not operate.

    2. Check the operation of the automatic high beam function.
      1. At night, when driving the vehicle with the automatic high beam system in standby mode, check that the high beams automatically turn on after a short delay when all of the following conditions are met:
        • The vehicle speed is more than approximately 34 km/h (21 mph).
        • The area in front of the vehicle is dark.
        • There are no oncoming vehicles with headlights on.
        • There are no preceding vehicles with taillights on.
        • There are few streetlights along the street ahead.
      2. At night, when driving the vehicle with the high beams turned on by the automatic high beam system, check that the automatic high beam system turns off the high beams and returns to standby mode when any of the following conditions are met:
        • The vehicle speed is less than approximately 27 km/h (17 mph).
        • The level of ambient light is higher than a specified threshold.
        • There are oncoming vehicles with headlights on.
        • There are preceding vehicles with taillights on.
        • Light from streetlights ahead is higher than a specified threshold.
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