PRECAUTION
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
NOTICE:
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) |
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CAUTION:
When driving on public roads, obey all speed limits and traffic laws.
PRE-COLLISION SYSTEM OPERATION CONDITIONS
(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 Detectable objects | 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) |
Detectable objects | 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) |
Detectable objects | 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:
HINT:
When the vehicle is stopped due to operation of pre-collision braking, pre-collision braking operation will be canceled approximately 2 seconds after the vehicle has stopped.
(c) The system may not operate in the following situations:
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.
(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:
(c) In some situations such as the following, sufficient braking force may not be obtained, preventing the system from performing properly:
(d) When the VSC is disabled, the pre-collision system performs the following:
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:
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.
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(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
Sequential Recognition: Click here
(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 Lexus genuine part. If a non-Lexus 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.
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