PARKING SENSOR SYSTEM

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Outline

• The parking sensor system detects obstructions in the blind spot (vehicle rear/rear corners) to a wide extent using ultrasonic sensors and notifies the driver of the obstructions using the indicator and buzzer.

  Warning
  • The parking sensor is a device to assist the driver in confirming safety. It is not a substitute for the driver and cannot guarantee 100% safety. Do not rely completely on the parking sensor and drive while confirming the safety of the surrounding area visually.

• The following circumstances may obstruct the ultrasonic sensor resulting in an accident:

  ― Ice, snow, or dirt is adhering to the ultrasonic sensor.
  ― The ultrasonic sensor is covered by foreign material (such as bumper stickers).
  ― A shock is applied to the bumper in an accident and the ultrasonic sensor installation angle is deviated.
  ― The ultrasonic sensor is exposed to heavy rain or water-spray from the road.
  ― There is another device emitting ultrasonic waves (such as a parking assist system of another vehicle) near the ultrasonic sensor.

• The parking sensor may not operate correctly under the following conditions:

  ― Ice, snow, or dirt is adhering to the ultrasonic sensor surface.
  ― The ultrasonic sensor is frozen.
  ― The vehicle is in a tilted position.
  ― The vehicle is parked on a steep incline or there is a difference in height between lines.
  ― Obstructions have approached too close to the sensor.

• The parking sensor may not detect the following items:

  ― Thin objects such as wire or rope
  ― Items which absorb ultrasonic waves easily, such as cotton or snow
  ― Angular-shaped objects
  ― Tall objects with protruding at the top
  ― Short objects
  ― Objects located immediately below the bumper, such as wheel stoppers

• The warning alert may activate while driving near parked vehicles/guardrails/walls on a narrow road, or while driving on a slope, gravel road, or grass field. This is a normal effect caused by the system's response to ultrasonic waves, and does not indicate a malfunction.

Function

• The ultrasonic sensor assembled to the bumper detects an obstruction and the parking sensor control module notifies the driver of the area and the distance between the vehicle and the obstruction using the parking sensor buzzer.

Obstruction detection function

  • The obstruction detection function produces ultrasonic waves to measure the distance to an obstruction. The buzzer sounds pattern switches according to the distance between the detecting vehicle and the obstruction.

On-board diagnostic function

  • If the parking sensor control module detects the ultrasonic sensor malfunction (open circuit, freezing, soiling) the buzzer sounds according to the following:

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Volume adjustment function

  • The volume of the parking sensor buzzer can be adjusted. Refer to the Workshop Manual for the adjustment procedure.

Structural view

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System wiring diagram

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Operation

  Note
  • When the trailer switch (dealer option) is switched ON (operational), the parking sensor buzzer does not sound.

• The parking sensor system activates when the ignition is switched ON. If the parking sensor system activates normally and the selector lever is in the R position, the microcomputer in the parking sensor control module sounds the buzzer sounds according to the following:.

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Obstruction detection function operation

1. The ultrasonic sensor emits ultrasonic waves which an obstruction will reflect.

2. The reflected wave from the obstruction is received by the ultrasonic sensor and sent to the parking sensor control module.

3. When the microcomputer in the parking sensor control module receives the reflected signal, it calculates the detected distance to the obstruction.

4. The microcomputer in the parking sensor control module operates the ultrasonic sensor based on the distance between the parking sensor and the obstruction, the shift position, and the vehicle speed signals.

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  • The operation conditions of the obstruction detection function are as follows:

×: Operates
—: Does not operate

Vehicle condition | Ultrasonic sensor
Shift position | Vehicle speed | Corner | Back
Except R position | 10—15 km/h {6.3—9.3 mph} or less | — | —
10—15 km/h {6.3—9.3 mph} or more | — | —
R position | 10—15 km/h {6.3—9.3 mph} or less | × | ×
10—15 km/h {6.3—9.3 mph} or more | — | ×

  • The detection area range of the ultrasonic sensor is as follows:

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  • When the operation conditions for the ultrasonic sensor are met, the parking sensor control module sounds the parking sensor buzzer according to the distance between the vehicle and obstruction as follows:

Ultrasonic sensor | Zone | Distance from obstruction | Wave pattern
Corner sensor / back sensor | Maximum short distance | Approx. 0—30 cm {0—11 in} |
Short distance | Approx. 30—31 cm {11.9—12.2 in} |
Intermediate distance | Approx. 32—50 cm {13—19 in} |
Long distance | Approx. 51—100 cm {21.0—39.3 in} |
Maximum long distance | Approx. 101—150 cm {39.8—59.0 in} |