Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM1000000021JCC
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 - 10/2022]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: PRECAUTION; 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]

PRECAUTION

NOTICE:

The different types of forward recognition camera cover are shown in the table below.

Before starting work, check the type of the forward recognition camera cover.

PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL

NOTICE:

  • When disconnecting the cable from the negative (-) auxiliary battery terminal, some systems must be initialized after the cable is reconnected.

    Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; INTRODUCTION: REPAIR INSTRUCTION: PRECAUTION

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

    Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; PRE-COLLISION: PRE-COLLISION SYSTEM: INITIALIZATION

CAUTION:

When driving on public roads, obey all speed limits and traffic laws.

PRE-COLLISION SYSTEM OPERATION CONDITIONS

(a) Operational conditions

(1) The pre-collision system is enabled and the system determines that the possibility of a frontal collision with a detected object is high. The system may not operate in the following situations:

  • If an auxiliary 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).

(2) The operation speeds and operation cancellation for each function is listed below.

  • Pre-collision warning

    Detectable objects

    Vehicle speed

    Relative speed between your vehicle and object

    Vehicles

    Approximately 7 to 110 mph(10 to 180 km/h)

    Approximately 7 to 110 mph(10 to 180 km/h)

    Bicyclists and pedestrians

    Approximately 7 to 50 mph(10 to 80 km/h)

    Approximately 7 to 50 mph(10 to 80 km/h)

  • Pre-collision brake assist

    Detectable objects

    Vehicle speed

    Relative speed between your vehicle and object

    Vehicles

    Approximately 20 to 110 mph(30 to 180 km/h)

    Approximately 20 to 110 mph(30 to 180 km/h)

    Bicyclists and pedestrians

    Approximately 20 to 50 mph(30 to 80 km/h)

    Approximately 20 to 50 mph(30 to 80 km/h)

  • Pre-collision braking

    Detectable objects

    Vehicle speed

    Relative speed between your vehicle and object

    Vehicles

    Approximately 7 to 110 mph(10 to 180 km/h)

    Approximately 7 to 110 mph(10 to 180 km/h)

    Bicyclists and pedestrians

    Approximately 7 to 50 mph(10 to 80 km/h)

    Approximately 7 to 50 mph(10 to 80 km/h)

    If either of the following occurs 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.

HANDLING PRECAUTION FOR PRE-COLLISION SYSTEM

(a) Conditions under which the system may operate even if there is no possibility of a collision.

(1) In 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 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, radar equipped vehicles, etc., or other location where strong radio waves or electrical noise may be present.
  • When there are many things which can reflect the radio waves of the radar in the vicinity (tunnels, truss bridges, gravel roads, snow covered road that have tracks, etc.)

(b) Situations in which the system may not operate properly

(1) In some situations such as the following, an object may not be detected by the millimeter wave radar sensor assembly and forward recognition camera, preventing the system from operating properly:

  • 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 there are many things which can reflect the radio waves of the radar in the vicinity (tunnels, truss bridges, gravel roads, snow covered road that have tracks, etc.).
  • When there is an effect on the radio waves to the radar that is installed on another vehicle.
  • 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.
  • for HV Model:

    After the hybrid system has started the vehicle has not been driven for a certain amount of time

  • for Gasoline Model:

    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.

(c) In 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 wet.
  • If 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.
  • When the road surface has deep wheel tracks.
  • When driving on a hill road.
  • When driving on a road that has inclines to the left or right.

(d) If VSC is disabled:

  • If VSC is disabled, 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.

PRECAUTION BEFORE SERVICING

(a) When to disable the pre-collision system

In the following situations, disable the system, as it may not operate properly, possibly leading to an accident resulting in death or serious injury:

  • 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
  • for HV Model:

    When the vehicle is raised on a lift with the hybrid system on and the tires are allowed to rotate freely

  • for Gasoline Model:

    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
  • If 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
  • If equipment (snow plow, etc.) that may obstruct the millimeter wave radar sensor assembly or forward recognition camera is temporarily installed to the vehicle

TROUBLESHOOTING PRECAUTIONS

(a) If a malfunction related to terminal contact or part installation occurs, removal and reinstallation of the suspected part may return the system to normal. However, this normal condition may only be temporary.

(b) Before disconnecting connectors or removing/installing parts, determine the malfunctioning area by checking and writing down the vehicle conditions (output DTCs, etc.) at the time the malfunction occurred.

(c) Be sure to check for DTCs related to other systems. The pre-collision system may be influenced by malfunctions in other systems.

(d) The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

HANDLING PRECAUTIONS

(a) When removing and installing ECUs, sensors, switches or other pre-collision system related parts, perform the following:

  • Make sure that the ignition switch is off unless otherwise specified in the procedure.
  • After removal/installation, check for DTCs and confirm that a normal system code is output.

PRECAUTION WHEN REPLACING COMPONENTS

(a) Millimeter Wave Radar Sensor Assembly:

(1) When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle and a DTC may be stored.

(2) When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly beam axis alignment and to clear the vehicle control history. Before performing the Driving Adjustment, make sure to read Before Starting Driving Adjustment.

HINT:

Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

Triangle Target: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(TRIANGLE TARGET)

Flat Surface Target: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(FLAT SURFACE TARGET)

Driving Adjustment: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: DRIVING ADJUSTMENT

(b) Forward Recognition Camera:

(1) When the forward recognition camera is replaced with a new one or the windshield glass is replaced or removed/installed, make sure to read Before Starting Adjustment, then perform optical axis alignment for the forward recognition camera and clear the vehicle control history for each system.

HINT:

Forward recognition camera axis alignment can be performed by using either One Time Recognition, Sequential Recognition or Driving Adjustment.

One Time Recognition: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(ONE TIME RECOGNITION)

Sequential Recognition: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: TARGET ADJUSTMENT(SEQUENTIAL RECOGNITION)

Driving Adjustment: Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT CAMERA: DRIVING ADJUSTMENT

(2) When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle and a DTC may be stored.

(3) Do not dirty or damage the lens when replacing the forward recognition camera.

HINT:

If the forward recognition camera lens is touched, replace the forward recognition camera with a new one.

(4) Do not reuse a forward recognition camera that has been dropped or subjected to a strong impact.

(c) Windshield Glass:

(1) When replacing the windshield glass of a vehicle equipped with a forward recognition camera, make sure to use a Toyota genuine part. If a non-Toyota genuine part is used, the forward recognition camera may not be able to be installed due to a missing bracket or the pre-collision system may not operate properly due to a difference in the transmissivity or black ceramic border.

(2) Do not attach stickers, including transparent stickers, or other items to the outer side of the windshield glass assembly within the area in front of the forward recognition camera.

PRECAUTIONS FOR RECORDED DATA

(a) The pre-collision system records data related to vehicle control and operation. Make sure to clear the data if requested by the customer.

Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT CAMERA SYSTEM: UTILITY