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Home >> Lexus >> 2019 >> RX 450h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ Automatic Headlight Beam Level Control System) (Diagnostics - Introduction) (1 Of 2) >> Lighting System (W/ Automatic Headlight Beam Level Control System) >> Operation Check [12/2017 - 08/2019] >> Operation Check [12/2017 - 08/2019]
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Operation Check [12/2017 - 08/2019]

  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 [12/2017 - 08/2019] 

    1. Turn the power switch on (IG).
    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 go 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 [12/2017 - 08/2019] 

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

        HINT: 

        Before the lights go off, if the lock button on the key is pushed after all of the doors are locked, all of the lights will go 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 [12/2017 - 08/2019] 

    1. Turn the light control switch to the off, tail or AUTO position (with the low beam headlights not turned on via the automatic light control system). (w/o DRL OFF Switch)
    2. 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). (w/ DRL OFF Switch)
    3. Turn the power switch on (READY).
    4. Release the parking brake.
    5. Check that the daytime running lights come on.
  4. WELCOME LIGHT ILLUMINATION CONTROL OPERATION CHECK 
    1. Turn the light control switch to the AUTO position.
    2. Cover the automatic light control sensor.
    3. Turn the power switch off.
    4. Close and lock all doors.
    5. Unlock all doors by wireless door unlock or entry door unlock.
    6. Check that the parking lights come on for approximately 15 seconds.
  5. OUTSIDE HANDLE FOOT LIGHT CONTROL OPERATION CHECK 
    NOTE:

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

    Refer to CUSTOMIZE PARAMETERS [12/2017 - 08/2019] 

    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 power switch is off and all of the doors are closed.
      • The power switch is off, any door is opened when all doors are closed.
      Illuminate for 15 seconds, and then 2 steps fade out When any of the following conditions is met, the lights illuminate for 15 seconds, and then in 2 steps fade out:
      • An actuation area-linked function is used.*
      • All doors are closed and then any door is opened.
      • Any door is unlocked when the power switch is off and all of the doors are closed.
      • The power switch is off, any door is opened when all doors are closed.
      • Any door is closed or opened.
      Fade out immediately When the following condition is met, the lights fade out immediately:
      • The power switch is turned from off to on (ACC) or on (IG).
      2 steps fade out immediately When any of the following conditions is met, the lights 2 steps fade out immediately:
      • All doors are locked when all doors are closed and any door is unlocked.
      • All doors are locked again when all doors are closed and locked.
      • All doors are closed and then any door is opened.

      HINT: 

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

  6. CORNERING LIGHT CONTROL OPERATION CHECK 
    1. Turn the power switch on (IG).
    2. Turn the light control switch to the HEAD position.
    3. Perform the following operations while driving the vehicle at 35 km/h (22 mph) or less and check that the cornering lights operate appropriately.
      • Operate the right turn signal switch and check that the cornering light RH illuminates.
      • Operate the left turn signal switch and check that the cornering light LH illuminates.
      • Turn the steering wheel 80 degrees or more to the right and check that the cornering light RH illuminates. Turn the steering wheel to an angle of 30 degrees or less and check that the cornering light RH turns off.
      • Turn the steering wheel 80 degrees or more to the left and check that the cornering light LH illuminates. Turn the steering wheel to an angle of 30 degrees or less and check that the cornering light LH turns off.
      • Move the shift lever to R and check that the cornering light LH and cornering light RH illuminate.
  7. 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 [12/2017 - 08/2019] 

    1. Turn the power switch on (IG).
    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
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