Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001CUSH
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 01/2019]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): PRECAUTION; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

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

    2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; INTRODUCTION: REPAIR INSTRUCTION: INITIALIZATION

    Pre-collision System

    Lighting System (EXT) (w/ AFS)

    Power Door Lock Control System

  • 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.

    Click here 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): INITIALIZATION

PRE-COLLISION SYSTEM OPERATION CONDITIONS

CAUTION:

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

(a) The pre-collision system is enabled and the system determines that the possibility of a frontal collision with a detected object is high. Each function is operational at the following speed

Pre-collision warning:

Operation target

Vehicle speed

Relative speed between your vehicle and object

Vehicles

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

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

Bicyclists and pedestrians

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

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

Pre-collision brake assist:

Operation target

Vehicle speed

Relative speed between your vehicle and object

Vehicles

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

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

Bicyclists and pedestrians

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

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

Pre-collision braking:

Operation target

Vehicle speed

Relative speed between your vehicle and object

Vehicles

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

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

Bicyclists and pedestrians

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

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

(b) Cancelation of the pre-collision braking

(1) If 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

(c) The system may not operate in the following situations:

  • During the time until steering sensor zero point calibration is complete
  • When the shift position is in R
  • When VSC is off (Collision warning will still operate)
  • When the PCS warning light is illuminated

PRECAUTIONS FOR PRE-COLLISION SYSTEM

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

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 the 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 a steel 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 the 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

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

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 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
  • When 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
  • When 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.)
  • If the vehicle is being driven on a gravel road or other slippery surface

(d) If VSC is disabled, the pre-collision system performs the following:

  • 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.

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 your 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
  • 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 the normal condition may only be temporary.

(b) When determining the malfunctioning area, before disconnecting connectors or removing/installing parts, check for DTCs and note the vehicle condition and operations that were performed when the malfunction occurred (stored DTCs, etc.).

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

HANDLING PRECAUTIONS

(a) When removing or installing any ECUs or sensors, make sure that the engine switch is off unless otherwise specified in the procedure.

(b) After removing and installing any ECUs or sensor, make sure to check for DTCs and confirm that no DTCs are 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 adjustment and front radar acceleration sensor calibration, and to clear the vehicle control history.

Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

(b) Forward Recognition Camera:

(1) When the forward recognition camera has been replaced with a new one or the windshield glass has been removed and installed, it is necessary to perform forward recognition camera adjustment and to clear the vehicle control history.

HINT:

Forward recognition camera adjustment can be performed by using either One Time Recognition or Sequential Recognition. When clearing vehicle control history, refer to the following links:

One Time Recognition: Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (ONE TIME RECOGNITION)

Sequential Recognition: Click here 2019 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 01/2019]; CRUISE CONTROL: FRONT CAMERA: ADJUSTMENT (SEQUENTIAL RECOGNITION)

(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) When replacing the forward recognition camera, do not damage the camera lens or allow it to become contaminated with foreign matter.

(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 windshield glass near 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 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; CRUISE CONTROL: FRONT CAMERA SYSTEM (for Gasoline Model): UTILITY