System Description [02/2019 - ]

1. Environmental influence
   • There is an obstacle on the shoulder of the road (when the vehicle is driven in a narrow tunnel, on a narrow bridge or on a narrow road).
     Fig 1: Driving In A Narrow Tunnel, On A Narrow Bridge Or On A Narrow Road

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   • The vehicle is being driven on grass or a gravel road.
     Fig 2: Driving On Grass Or A Gravel Road

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   • The vehicle is driven toward a banner or flag, a low-hanging branch or a boom barrier (such as those used at railroad crossings, toll gates and parking lots).
     Fig 3: Driving Toward A Banner Or Flag, A Low-Hanging Branch Or A Boom Barrier

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     HINT: 

     Even if the parking support brake system operates while on a railroad crossing, brake control will be automatically be canceled after approximately 2 seconds. Brake control can also be canceled by depressing the brake pedal. After brake control is canceled, depress the accelerator pedal to drive out of the railroad crossing.

   • The vehicle is close to other vehicles while being parallel parked.
     Fig 4: Close To Other Vehicles While Being Parallel Parked

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   • The vehicle is being driven on a steep slope.
     Fig 5: Driving On A Steep Slope

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   • There are objects located lower than the ultrasonic sensors.
     Fig 6: Objects Located Lower Than The Ultrasonic Sensors

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   • When driving near a pillar (H-beam) in a parking lot or construction site, etc.
     Fig 7: Driving On A Narrow Road

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   • There is a rut or hole in the surface of the road.
   • When the vehicle is driven on a metal cover (grating), such as those used for drainage ditches.
2. Influence from the weather
   Fig 8: Influence From The Weather

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   • In severe weather such as fog, snow or a sandstorm.
   • Foreign matter such as snow, ice or mud is attached to an ultrasonic sensor. (The system returns to normal when the foreign matter is removed.)
   • When there is a downpour, or water is splashing on the vehicle.
   • Water is covering an ultrasonic sensor due to a flooded road.
3. Influence from other ultrasonic waves
   • When ultrasonic waves are received from the horn or parking sonar system of another vehicle, a motorcycle engine, or the air brakes of a large vehicle.
   • Electronic components such as a backlit license plate (especially fluorescent types), fog lights, a fender pole or a wireless antenna are installed near an ultrasonic sensor.
4. Changes in the vehicle.
   Fig 9: Changes In The Vehicle

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   • The height of the vehicle has drastically changed due to loading (the nose tilts up or down).
   • The vehicle is significantly tilted.
   • An ultrasonic sensor is misaligned due to a collision, etc.
5. Others
   Fig 10: Vehicle Is Being Loaded Onto A Ship, Truck Or Other Transport Vessel

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   • The vehicle is being loaded onto a ship, truck or other transport vessel.
   • The vehicle is being operated on a drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer.
   • When the vehicle is being towed.

• When a vehicle is travelling along a road that is located extremely close to a parking space.
  Fig 11: When A Vehicle Is Travelling Along A Road That Is Located Extremely Close To A Parking Space

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• When a vehicle is entering an adjacent parking space.
  Fig 12: When A Vehicle Is Entering An Adjacent Parking Space

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• When an object is passing extremely close to the vehicle.
  Fig 13: When An Object Is Passing Extremely Close To The Vehicle

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• When there is a metal object behind the vehicle such as a guard rail, wall, traffic sign or parked vehicle that easily reflects radio waves.
  Fig 14: When There Is A Metal Object Behind The Vehicle Such As A Guard Rail, Wall, Traffic Sign Or Parked Vehicle That Easily Reflects Radio Waves

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
• When water from a sprinkler, etc., is sprayed onto the blind spot monitor sensor.
• When a rotating object, such as an external air conditioning unit, is near the vehicle.

1. The parking support brake system uses the multi-information display in the combination meter assembly, the radio and display receiver assembly and PKSB OFF indicator light to indicate the operation status of the system.

1. When the operation conditions are met, the clearance warning ECU assembly sends display or illumination request signals to the combination meter assembly, radio and display receiver assembly and PKSB OFF indicator light. The clearance warning ECU assembly also sends buzzer sound request signals to the combination meter assembly.

*1: May be displayed if snow or other foreign matter is attached to an ultrasonic sensor.

*2: The parking support brake system turns on again when the power switch is turned off and then on (IG).

*3: Brake pedal is not depressed

1. When operation of the parking support brake system is temporarily suspended due to a malfunction or dirty ultrasonic sensor, a message is displayed on the multi-information display in the combination meter assembly, the PKSB OFF indicator light blinks and the buzzer sounds.

*1: Including when the shift lever is not in D or R.

*2: Only displayed when the power switch is turned on (IG).

1. When the parking support brake system is off, the PKSB OFF indicator light illuminates.

Fig 15: Intelligent Clearance Sonar System Off Display

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