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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) >> Initialization [12/2019 - 11/2023] >> Initialization [12/2019 - 11/2023]

Initialization [12/2019 - 11/2023]

NOTE:
  • The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during headlight ECU sub-assembly LH removal/installation are shown below.
    Replaced Part or Performed Procedure Necessary Procedures Proceed to
    Replacement of the headlight ECU sub-assembly LH or headlight assembly LH Synchronize the vehicle information SYNCHRONIZE VEHICLE INFORMATION
    Perform headlight ECU sub-assembly LH initialization HEADLIGHT ECU SUB-ASSEMBLY LH INITIALIZATION
    Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed Perform headlight ECU sub-assembly LH initialization HEADLIGHT ECU SUB-ASSEMBLY LH INITIALIZATION
    Auxiliary battery terminal is disconnected and connected Steering sensor zero point calibration Refer to INITIALIZATION [12/2019 - ]
  • If the steering sensor zero point calibration is not performed, the AFS may not operate correctly.
  • A new headlight ECU sub-assembly LH cannot operate until the vehicle information is registered.
  • After replacing the headlight ECU sub-assembly LH or headlight assembly LH, it is necessary to perform vehicle information registration and initialization.
  • Even if the headlight ECU sub-assembly RH is replaced with a new one, synchronize the vehicle information and initialization are not necessary.
  • Adjust the headlight aim after initializing the headlight ECU sub-assembly LH.

    Refer to ADJUSTMENT [12/2019 - ]

  • When a malfunction is detected in the lighting system (w/ AFS), rear height control sensor sub-assembly LH signal initialization is impossible. Perform troubleshooting before initialization.
  • The lighting system (w/ AFS) uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - 11/2023] 

  1. SYNCHRONIZE VEHICLE INFORMATION (When using the GTS) 
    NOTE:
    • Make sure to synchronize the vehicle information before performing initialization.
    • If synchronization fails, make sure to turn the ignition switch off then back ON before performing synchronization again.
    1. Turn the ignition switch off.
    2. Connect the GTS to the DLC3.
    3. Turn the ignition switch to ON.
    4. Check that the "Headlight System Uninitialized Visit Your Dealer" warning message is displayed on the multi-information display.
    5. Enter the following menus: Body Electrical / AFS / Utility / ECU Information Sync.

      Body Electrical > AFS > Utility 

      Tester Display
      ECU Information Sync
    6. Check the display on the GTS and press "Next".
    7. Check that the "Headlight System Malfunction Visit Your Dealer" warning message continuously blinks 6 times at 2 Hz on the multi-information display.

      HINT: 

      • If the "Headlight System Malfunction Visit Your Dealer" warning message does not start blinking on the multi-information display after perform the procedure again.
      • If the "Headlight System Malfunction Visit Your Dealer" warning message changes from blinking to displayed on the multi-information display, the rear height control sensor sub-assembly LH may be malfunctioning.
    8. Press "Exit".
    9. Turn the ignition switch off.
      NOTE:

      After synchronizing the vehicle information, initialize the headlight ECU sub-assembly LH.

  2. SYNCHRONIZE VEHICLE INFORMATION (When not using the GTS) 
    NOTE:
    • Make sure to synchronize the vehicle information before performing initialization.
    • If synchronization fails, make sure to turn the ignition switch off then back ON before performing synchronization again.
    1. Turn the ignition switch to ON.
    2. Check that the "Headlight System Uninitialized Visit Your Dealer" warning message is displayed on the multi-information display.
    3. Using the headlight dimmer switch, turn the low beam headlights on and off 8 times within 20 seconds after turning the ignition switch to ON.
      NOTE:

      If the low beam headlights illuminate when the ignition switch is ON, shine a light on the automatic light control sensor to turn the low beam headlights off before operating the headlight dimmer switch.

      HINT: 

      If this step cannot be completed within 20 seconds, turn the ignition switch off. Then, turn the ignition switch to ON and restart the procedure.

    4. Check that the "Headlight System Malfunction Visit Your Dealer" warning message continuously blinks 6 times at 2 Hz on the multi-information display.

      HINT: 

      • If the "Headlight System Malfunction Visit Your Dealer" warning message does not start blinking on the multi-information display after perform the procedure again.
      • If the "Headlight System Malfunction Visit Your Dealer" warning message changes from blinking to displayed on the multi-information display, turn the ignition switch off and then ON. If "Headlight System Malfunction Visit Your Dealer" is displayed immediately after the ignition switch is turned ON, the rear height control sensor sub-assembly LH may be malfunctioning.
    5. Turn the ignition switch off.
      NOTE:

      After synchronizing the vehicle information, initialize the headlight ECU sub-assembly LH.

  3. HEADLIGHT ECU SUB-ASSEMBLY LH INITIALIZATION (When using the GTS) 
    NOTE:

    Make sure to synchronize the vehicle information before performing initialization.

    1. Prepare vehicle for initialization (w/ DRL OFF Switch)
      • Unload the vehicle, ensuring that the spare tire, tools and jack are in their original positions.
      • Check that there are no occupants in the vehicle.
      • Turn the light control switch to the DRL OFF position.
      • Stop the vehicle on a level surface and keep the vehicle height unchanged.
    2. Prepare vehicle for initialization (w/o DRL OFF Switch)
      • Unload the vehicle, ensuring that the spare tire, tools and jack are in their original positions.
      • Check that there are no occupants in the vehicle.
      • Turn the light control switch to the AUTO position.*
      • Stop the vehicle on a level surface and keep the vehicle height unchanged.

      HINT: 

      *: Turn off the headlights.

    3. Check the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.
      1. Turn the ignition switch to ON, and check the condition of the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.

        OK

        Condition Specified Condition
        The headlight ECU sub-assembly LH or headlight assembly LH has been replaced with a new one. "Headlight System Malfunction Visit Your Dealer" blinks 6 times at 2 Hz.
        Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed. "Headlight System Malfunction Visit Your Dealer" is not displayed.

        HINT: 

        If the condition of the "Headlight System Malfunction Visit Your Dealer" warning message is different than listed in the table above, the headlight ECU sub-assembly LH or combination meter assembly may be malfunctioning.

    4. Perform initialization.
      1. Turn the ignition switch off.
      2. Connect the GTS to the DLC3.
      3. Turn the ignition switch to ON.
      4. Enter the following menus: Body Electrical / AFS / Utility / Height Sensor Initialization.

        Body Electrical > AFS > Utility 

        Tester Display
        Height Sensor Initialization
      5. Check the display on the GTS and press "Next".
      6. Press "Exit".
      7. Check the condition of the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.

        Standard

        Condition Specified Condition
        The headlight ECU sub-assembly LH or headlight assembly LH has been replaced with a new one. Blinks 6 times at 2 Hz → Blinks 3 times at 2 Hz for 1.5 seconds.
        Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed. Off → Blinks 3 times at 2 Hz for 1.5 seconds.

        HINT: 

        • If the "Headlight System Malfunction Visit Your Dealer" warning message is displayed on the multi-information display, the headlight ECU sub-assembly LH may be malfunctioning.
        • If initialization does not finish normally, restart the initialization procedure from step (i).
      8. Check that initialization finishes normally and turn the ignition switch off.
  4. HEADLIGHT ECU SUB-ASSEMBLY LH INITIALIZATION (When not using the GTS) 
    NOTE:

    Make sure to synchronize the vehicle information before performing initialization.

    1. Prepare vehicle for initialization (w/ DRL OFF Switch)
      • Unload the vehicle, ensuring that the spare tire, tools and jack are in their original positions.
      • Check that there are no occupants in the vehicle.
      • Turn the light control switch to the DRL OFF position.
      • Stop the vehicle on a level surface and keep the vehicle height unchanged.
    2. Prepare vehicle for initialization (w/o DRL OFF Switch)
      • Unload the vehicle, ensuring that the spare tire, tools and jack are in their original positions.
      • Check that there are no occupants in the vehicle.
      • Turn the light control switch to the AUTO position.*
      • Stop the vehicle on a level surface and keep the vehicle height unchanged.

      HINT: 

      *: Turn off the headlights.

    3. Check the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.
      1. Turn the ignition switch to ON, and check the condition of the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.

        OK

        Condition Specified Condition
        The headlight ECU sub-assembly LH or headlight assembly LH has been replaced with a new one. "Headlight System Malfunction Visit Your Dealer" blinks 6 times at 2 Hz.
        Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed. "Headlight System Malfunction Visit Your Dealer" is not displayed.

        HINT: 

        If the condition of the "Headlight System Malfunction Visit Your Dealer" warning message is different than listed in the table above, the headlight ECU sub-assembly LH or combination meter assembly may be malfunctioning.

    4. Perform initialization. (w/ DRL OFF Switch)
      1. Turn the ignition switch and light control switch DRL OFF.
      2. Cover the automatic light control sensor with a lightproof object.
      3. Perform the following steps within 5 seconds.
        1. Press the ignition switch 2 times.

          HINT: 

          Turn the ignition switch to ON.

        2. While pulling the headlight dimmer switch, turn it from DRL OFF to AUTO to DRL OFF again 3 times or more.

          HINT: 

          Check that the parking lights turn from off to on and back off again.

        3. Turn the light control switch DRL OFF.

        HINT: 

        • Perform the above operation within 5 seconds.
        • When initialization mode has been entered, "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display starts blinking at 1 Hz.
    5. Perform initialization. (w/o DRL OFF Switch)
      1. Turn the ignition switch off.
      2. Turn the light control switch to the AUTO position*.

        HINT: 

        *: Turn off the headlights.

      3. Shine a light on the automatic light control sensor.
      4. Perform the following steps within 5 seconds.
        1. Press the ignition switch 2 times.

          HINT: 

          Turn the ignition switch to ON.

        2. While pulling the headlight dimmer switch, turn it from AUTO to tail to AUTO again 3 times or more.

          HINT: 

          Check that the parking lights turn from off to on and back off again.

        3. Turn the light control switch to the AUTO position.*

          HINT: 

          *: Turn off the headlights.

        HINT: 

        • Perform the above operation within 5 seconds.
        • When initialization mode has been entered, "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display starts blinking at 1 Hz.
    6. Check the condition of the "Headlight System Malfunction Visit Your Dealer" warning message on the multi-information display.

      Standard

      Condition Specified Condition
      The headlight ECU sub-assembly LH or headlight assembly LH has been replaced with a new one. Blinks 6 times at 2 Hz → Blinks 3 times at 2 Hz for 1.5 seconds.
      Replacement of the rear height control sensor sub-assembly LH, removal and reinstallation of the rear height control sensor sub-assembly LH, replacement of the suspension, etc. have been performed. Off → Blinks 3 times at 2 Hz for 1.5 seconds.

      HINT: 

      • If the "Headlight System Malfunction Visit Your Dealer" warning message is displayed on the multi-information display, the headlight ECU sub-assembly LH may be malfunctioning.
      • If initialization does not finish normally, restart the initialization procedure from step (i).
    7. Check that initialization finishes normally and turn the ignition switch off.
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