Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Precaution

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)

• If the battery has been discharged and charged or the cable has been disconnected and reconnected to the negative (-) battery terminal, perform Steering Sensor Zero Point Calibration.

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• The accelerator pedal is depressed strongly
• The steering wheel is turned sharply or abruptly

• If a battery terminal has been disconnected and reconnected and then the vehicle has not been driven for a certain amount of time
• If the shift lever is in R
• When the VSC OFF indicator is illuminated (only the pre-collision warning function will be operational)

• When passing a detectable object, etc.
• When changing lanes while overtaking a detectable object, etc.
• When approaching a detectable object in an adjacent lane or on the roadside, such as when changing the course of travel or driving on a winding road.
• When rapidly closing on a detectable object, etc.
• When approaching objects on the roadside, such as detectable objects, guardrails, utility poles, trees, or walls.
• When there is a detectable object or other object by the roadside at the entrance of a curve.
• When there are patterns or paint in front of your vehicle that may be mistaken for a detectable object.
• When the front of your vehicle is hit by water, snow, dust, etc.
• When overtaking a detectable object that is changing lanes or making a right/left turn.
• When passing a detectable object in an oncoming lane that is stopped to make a right/left turn.
• When a detectable object approaches very close and then stops before entering the path of your vehicle.
• If the front of your vehicle is raised or lowered, such as when on an uneven or undulating road surface.
• When driving on a road surrounded by a structure, such as in a tunnel or on an iron bridge.
• When there is a metal object (manhole cover, steel plate, etc.), steps, or a protrusion in front of your vehicle.
• When passing under an object (road sign, billboard, etc.).
• When approaching an electric toll gate barrier, parking area barrier, or other barrier that opens and closes.
• When using an automatic car wash.
• When driving through or under objects that may contact your vehicle, such as thick grass, tree branches, or a banner.
• When driving through steam or smoke.
• When driving near an object that reflects radio waves, such as a large truck or guardrail.
• When driving near a TV tower, broadcasting station, electric power plant, or other location where strong radio waves or electrical noise may be present.

• When a detectable object is approaching your vehicle.
• When your vehicle or a detectable object is wobbling.
• If a detectable object makes an abrupt maneuver (such as sudden swerving, acceleration or deceleration).
• When your vehicle approaches a detectable object rapidly.
• When a detectable object is not directly in front of your vehicle.
• When a detectable object is near a wall, fence, guardrail, manhole cover, vehicle, steel plate on the road, etc.
• When a detectable object is under a structure.
• When part of a detectable object is hidden by an object, such as large baggage, an umbrella, or guardrail.
• When multiple detectable objects are close together.
• If the sun or other light is shining directly on a detectable object.
• When a detectable object is a shade of white and looks extremely bright.
• When a detectable object appears to be nearly the same color or brightness as its surroundings.
• If a detectable object cuts or suddenly emerges in front of your vehicle.
• When the front of your vehicle is hit by water, snow, dust, etc.
• When a very bright light ahead, such as the sun or the headlights of oncoming traffic, shines directly into the forward recognition camera.
• When approaching the side or front of a vehicle ahead.
• If a vehicle ahead is a motorcycle.
• If a vehicle ahead is narrow, such as a personal mobility vehicle.
• If a preceding vehicle has a small rear end, such as an unloaded truck.
• If a preceding vehicle has a low rear end, such as a low bed trailer.
• If a vehicle ahead has extremely high ground clearance.
• If a vehicle ahead is carrying a load which protrudes past its rear bumper.
• If a vehicle ahead is irregularly shaped, such as a tractor or side car.
• If a vehicle ahead is a child sized bicycle, a bicycle that is carrying a large load, a bicycle ridden by more than one person, or a uniquely shaped bicycle (bicycle with a child seat, tandem bicycle, etc.)
• If a pedestrian/or the riding height of a bicyclist ahead is shorter than approximately 3.2 ft. (1 m) or taller than approximately 6.5 ft. (2 m).
• If a pedestrian/bicyclist is wearing oversized clothing (a rain coat, long skirt, etc.), making their silhouette obscure.
• If a pedestrian is bending forward or squatting or bicyclist is bending forward.
• If a pedestrian/bicyclist is moving fast.
• If a pedestrian is pushing a stroller, wheelchair, bicycle or other vehicle.
• When driving in inclement weather such as heavy rain, fog, snow or a sandstorm.
• When driving through steam or smoke.
• When the surrounding area is dim, such as at dawn or dusk, or while at night or in a tunnel, making a detectable object appear to be nearly the same color as its surroundings.
• When driving in a place where the surrounding brightness changes suddenly, such as at the entrance or exit of a tunnel.
• After the engine has started the vehicle has not been driven for a certain amount of time.
• While making a left/right turn and for a few seconds after making a left/right turn.
• While driving on a curve and for a few seconds after driving on a curve.
• If your vehicle is skidding.
• If the front of the vehicle is raised or lowered.
• If the wheels are misaligned.
• If a wiper blade is blocking the forward recognition camera.
• The vehicle is being driven at extremely high speeds.
• When driving on a hill.
• If the millimeter wave radar sensor assembly or forward recognition camera is misaligned.

• When the braking functions cannot operate to their full extent, such as when the brake parts are extremely cold, extremely hot, or wet
• When the vehicle is not properly maintained (brakes or tires are excessively worn, improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery surface

• Disables the pre-collision brake assist and pre-collision braking functions.
• Turns on the PCS warning light.
• Displays "VSC Turned Off Pre-collision Brake System Unavailable" on the multi-information display.

• When the vehicle is being towed
• When the vehicle is towing another vehicle
• When transporting the vehicle via truck, boat, train or similar means of transportation
• When the vehicle is raised on a lift with the engine running and the tires are allowed to rotate freely
• When inspecting the vehicle using a drum tester such as a chassis dynamometer or speedometer tester, or when using an on vehicle wheel balancer
• When a strong impact is applied to the front bumper or front grille, due to an accident or other reasons
• When the vehicle cannot be driven in a stable manner, such as when the vehicle has been in an accident or is malfunctioning
• When the vehicle is driven in a sporty manner or off-road
• When the tires are not properly inflated
• When the tires are very worn
• When tires of a size other than specified are installed
• When tire chains are installed
• When a compact spare tire or an emergency tire puncture repair kit is used
• When equipment (snow plow, etc.) that may obstruct the millimeter wave radar sensor assembly or forward recognition camera is temporarily installed to the vehicle

Pre-collision System

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Parts Location

PARTS LOCATION ILLUSTRATION *1 FORWARD RECOGNITION CAMERA *2 MILLIMETER WAVE RADAR SENSOR ASSEMBLY *3 BRAKE ACTUATOR ASSEMBLY - SKID CONTROL ECU *4 ECM ILLUSTRATION *A w/o ...

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