Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Precaution

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System (w/ Automatic Headlight Beam Level Control System) / Precaution

PRECAUTION

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL

NOTICE:

When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.

System Name

See Procedure

Lane Control System

Pre-collision System

Intelligent Clearance Sonar System

Parking Assist Monitor System

Panoramic View Monitor System

Lighting System (w/ Automatic Headlight Beam Level Control System)

Power Door Lock Control System

Power Back Door System (w/ Outside Door Control Switch)

PRECAUTION FOR BULB REPLACEMENT

(a) Always prepare a new bulb for immediate replacement. While replacing the bulb, the lens may attract dust and moisture if the bulb is removed from the vehicle for a long time.

(b) Always replace a bulb with another bulb of the same wattage.

(c) If only replacing the bulb on one side, differences in brightness and lighting color between the right and left sides may occur.

(d) Securely install the socket after bulb replacement. The lens may become cloudy or the light assembly may fill with water through gaps around the socket if it is not installed securely.

REPLACEMENT PRECAUTIONS

(a) When replacing the No. 1 headlight ECU sub-assembly LH, always replace it with a new one. If a No. 1 headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PRECAUTIONS FOR AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM

(a) If any of the following are performed, it is necessary to initialize the No. 1 headlight ECU sub-assembly LH.

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  • Replacement of the rear height control sensor sub-assembly RH
  • Removal/installation of the rear height control sensor sub-assembly RH
  • Work that changes the vehicle height such as replacement of suspension components

(b) If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

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(c) If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.*

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  • *: for TMMC Made

PRECAUTION FOR AUTOMATIC HIGH BEAM SYSTEM (w/ Automatic High Beam System)

(a) General Description

The automatic high beam system is a system that helps ensure visibility by automatically turning the high beam headlights on and off. Additionally, due to control limitations of the automatic high beam system, it may be necessary to manually turn the high beam headlights on and off. For safety reasons, make sure to turn the high beam headlights 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 beam headlights might cause glare or flash pedestrians or the occupants of other vehicles. Manual operation should be considered.

Factor

Condition

Weather/Climate
  • When driving in bad weather (rain, snow, fog, sandstorms, etc.).
  • 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
  • When lights similar to headlights or taillights are in the vicinity of the vehicle.
  • When a nearby vehicle has no lights or its lights are off.
  • When a vehicle in front has misaligned lights, or its lights are changing color.
  • When a vehicle in front has extremely dirty headlights or taillights.

Road conditions
  • When driving in areas where the conditions often change between bright and dark.
  • When driving on hilly roads.
  • When driving on winding roads or around sharp curves.
  • When driving on bumpy roads (cobblestone paving, gravel roads, rough unpaved roads, etc.).
  • When highly reflective objects are in front of the vehicle (mirrors, road signs, etc.).

Own vehicle
  • When the headlights are damaged, deformed or dirty.
  • When the vehicle posture is abnormal (posture has changed due to the vehicle being fully loaded, a trailer being towed, road conditions, etc.).
  • When the vehicle has other malfunctions or has been modified.

Automatic high beam system

Malfunction:

When the automatic high beam indicator light on the combination meter assembly is off and "Headlight System Malfunction Visit Your Dealer" is displayed on the multi-information display.

Others:

  • When the automatic high beam system does not seem to be turning the high beam headlights on and off properly.
  • When the automatic high beam system is frequently turning the high beam headlights on and off.
  • When the glare from the high beam headlights would disturb pedestrians or the drivers of other vehicles.

PRECAUTION FOR FRONT CAMERA SYSTEM (w/ Automatic High Beam System)

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    Lighting System (w/ Automatic Headlight Beam Level Control System)
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    Parts Location
    PARTS LOCATION ILLUSTRATION *A w/ Automatic High Beam System *B w/ Front Fog Light *1 HEADLIGHT ASSEMBLY LH - NO. 1 HEADLIGHT ECU SUB-ASSEMBLY LH - HEADLIGHT UNIT LH *2 HEADLIGHT A ...

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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