2022 Lexus RX 350 Owners Manual - PCS (PRE-COLLISION SYSTEM)

Pre-collision brake assist

Pre-collision braking

The system may not operate in the following situations:If a battery terminal has been disconnected and reconnected and then the vehicle has not been driven for a certain amount of timeIf the shift lever is in RWhen the VSC OFF indicator is illuminated (only the pre-collision warning function will be operational)Object detection functionThe system detects objects based on their size, profile, motion, etc. However, an object may not be detected depending on the surrounding brightness and the motion, posture, and angle of the detected object, preventing the system from operating properly. (Situations in which the system may not operate properly)The illustration shows an image of detectable objects.

Cancelation of the pre-collision brakingIf either of the following occur while the pre-collision braking function is operating, it will be canceled:The accelerator pedal is depressed strongly.The steering wheel is turned sharply or abruptly.Conditions under which the system may operate even if there is no possibility of a collisionIn some situations such as the following, the system may determine that there is a possibility of a frontal collision and operate.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 wallsWhen 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 objectWhen 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 vehicleIf the front of your vehicle is raised or lowered, such as when on an uneven or undulating road surfaceWhen driving on a road surrounded by a structure, such as in a tunnel or on an iron bridgeWhen there is a metal object (manhole cover, steel plate, etc.), steps, or a protrusion in front of your vehicleWhen passing under an object (road sign, billboard, etc.)

When approaching an electric toll gate barrier, parking area barrier, or other barrier that opens and closesWhen using an automatic car washWhen driving through or under objects that may contact your vehicle, such as thick grass, tree branches, or a banner

When driving through steam or smokeWhen driving near an object that reflects radio waves, such as a large truck or guardrailWhen driving near a TV tower, broadcasting station, electric power plant, or other location where strong radio waves or electrical noise may be presentSituations in which the system may not operate properlyIn some situations such as the following, an object may not be detected by the radar sensor and front camera, preventing the system from operating properly:When a detectable object is approaching your vehicleWhen your vehicle or a detectable object is wobblingIf a detectable object makes an abrupt maneuver (such as sudden swerving, acceleration or deceleration)When your vehicle approaches a detectable object rapidlyWhen 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 structureWhen part of a detectable object is hidden by an object, such as large baggage, an umbrella, or guardrailWhen multiple detectable objects are close togetherIf the sun or other light is shining directly on a detectable objectWhen a detectable object is a shade of white and looks extremely brightWhen a detectable object appears to be nearly the same color or brightness as its surroundingsIf a detectable object cuts or suddenly emerges in front of your vehicleWhen 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 front cameraWhen approaching the side or front of a vehicle aheadIf a vehicle ahead is a motorcycleIf a vehicle ahead is narrow, such as a personal mobility vehicleIf a preceding vehicle has a small rear end, such as an unloaded truckIf 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 bumperIf a vehicle ahead is irregularly shaped, such as a tractor or side carIf 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 obscureIf a pedestrian is bending forward or squatting or bicyclist is bending forwardIf a pedestrian/bicyclist is moving fastIf a pedestrian is pushing a stroller, wheelchair, bicycle or other vehicleWhen driving in inclement weather such as heavy rain, fog, snow or a sandstormWhen driving through steam or smokeWhen 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 surroundingsWhen driving in a place where the surrounding brightness changes suddenly, such as at the entrance or exit of a tunnelAfter the engine has started the vehicle has not been driven for a certain amount of timeWhile making a left/right turn and for a few seconds after making a left/right turnWhile driving on a curve and for a few seconds after driving on a curveIf your vehicle is skiddingIf the front of the vehicle is raised or lowered

If the wheels are misalignedIf a wiper blade is blocking the front cameraThe vehicle is being driven at extremely high speedsWhen driving on a hillIf the radar sensor or front camera is misalignedIn some situations such as the following, sufficient braking force may not be obtained, preventing the system from performing properly:If the braking functions cannot operate to their full extent, such as when the brake parts are extremely cold, extremely hot, or wetIf 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 surfaceIf VSC is disabledIf VSC is disabled (Turning off both TRAC, VSC and Trailer Sway Control systems), the pre-collision brake assist and pre-collision braking functions are also disabled.The PCS warning light will turn on and “ VSC Turned Off Pre-Collision Brake System Unavailable” will be displayed on the multi-information display.