Lexus NX manuals

Lexus NX: Operation Check

Lexus NX Service Manual / Vehicle Exterior / Lighting (ext) / Automatic High Beam System / Operation Check

OPERATION CHECK

AUTOMATIC HIGH BEAM SYSTEM OPERATION CHECK

(a) Check the operation of the automatic high beam indicator light.

*a

Automatic High Beam Indicator Light

NOTICE:

If the forward recognition camera cannot correctly recognize the front due to bad weather (dense fog, etc.) or obstructions, the automatic high beam indicator in the combination meter assembly may illuminate, and the automatic high beam system may not operate.

(1) Turn the power switch on (IG).

(2) Turn the headlight dimmer switch assembly (light control switch) to the AUTO or head position and the low beam headlights are on.

(3) Turn the headlight dimmer switch assembly to the low position.

(4) Turn the combination switch assembly (automatic high beam main switch) on.

(5) Check that the automatic high beam indicator comes on.

(b) 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:

  • Vehicle speed is more than 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.

NOTICE:

The low beams may not change to high beams due to illumination from city lighting, signals, or billboards or due to reflective surfaces, such as signs or signboards.

(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:

  • Vehicle speed is less than 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.

NOTICE:

  • Under the following conditions, the high beams may change to the low beams.
    1. There is interference from other illumination, such as city lighting, signals or billboards, or reflective
    2. There is interference from the fog lights of an oncoming vehicle
    3. A bicycle, etc. is detected
  • Under the following conditions, the high beams may not change to the low beams.
    1. Passing an oncoming vehicle on a curve
    2. Preceding or oncoming vehicle appears and disappears on a continuous curve
    3. Preceding or oncoming vehicle appears and disappears due to the median, roadside trees or other
    4. Another vehicle cuts in front of the vehicle
    5. Preceding or oncoming vehicle has no lights, has lights with unusual colors, or has very dim lights

(3) When any of the following conditions are met, the automatic high beam system will be canceled and the indicator light will turn off:

  • The power switch is turned off.
  • The light control switch is turned to any position except the AUTO or head position.
  • The headlight dimmer switch assembly is moved to the high position.
  • The combination switch assembly (automatic high beam main switch) is off.

(a) General Description

The automatic high beam system is a system that helps ensure visibility by automatically turning the high beams on and off. In addition, due to control limitations of the automatic high beam system, it may be necessary to manually turn the high beams on and off. For safety reasons, make sure to turn the high beams on and off manually according to the driving conditions.

(b) Conditions Unsuitable for Using Automatic High Beam System

Under the following conditions, the automatic high beam system might not detect other vehicles or lights correctly, or the high beams might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

Factor

Condition

Weather/Climate
  • Inclement weather such as heavy rain, fog, sandstorms or snow.
  • The temperature inside the vehicle is high.
  • The taillights of a proceeding vehicle are obscured by snow, etc.

Front windshield

Refer to Front Camera System.

Forward recognition camera

Refer to Front Camera System.

Nearby vehicles or lights
  • There are lights that resemble headlights or taillights in the surrounding area.
  • The headlights of an oncoming vehicle or taillights of a preceding vehicle are not illuminated.
  • The headlights of an oncoming vehicle or taillights of a preceding vehicle are dirty or discolored.
  • An oncoming or preceding vehicle has only one of its headlights or taillights on or is a motorcycle.
  • The headlights of an oncoming vehicle are misaligned.
  • The rear of a preceding vehicle is highly reflective or has a highly reflective object attached.
  • A bicycle or similar lightweight vehicle is detected.
  • There is a sudden change in brightness.

Road conditions
  • Driving on an undulating road.
  • Driving on a road with many curves or a sharp curve.
  • Driving on a road with a poor surface such as an unpaved road.
  • There is a strong reflection from a sign or mirror in front of the vehicle.

Own vehicle
  • The headlights are malfunctioning.
  • The attitude of the vehicle is abnormal such as when the vehicle is fully loaded with passengers and luggage, has a flat tire, or is towing a trailer.

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