Toyota Parking Assist-Sensor System (W/O Multi-Display) System Description

  1. GENERAL

  1. FUNCTION OF COMPONENTS

  1. OPERATION EXPLANATION

Toyota Parking Assist-Sensor System (W/O Multi-Display) -- System Description



GENERAL

  1. When the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle, the system informs the driver of the distance between the sensors and the obstacles by sounding a buzzer.


FUNCTION OF COMPONENTS

Components
Function
Clearance warning ECU
Receives signals from the ultrasonic sensors. Based on the received wave, the ECU calculates the approximate distance between the vehicle and obstacle, and sends a buzzer signal to the No. 1 clearance warning buzzer.
Back sonar or clearance switch assembly
Supplies electrical power to the sensors. Outputs system on/off signals to the clearance warning ECU.
No.1 ultrasonic sensor
Sends and receives ultrasonic waves.
Clearance warning indicator assembly
Displays the location of the obstacle and the approximate distance between the vehicle the obstacle. Turns the TOYOTA parking assist-sensor system on and off.
No. 1 clearance warning buzzer
Sounds to inform the driver of to the distance to the obstacle.
Combination meter assembly
Receives speed of each wheel via the skid control ECU, and then sends the signal to the clearance warning ECU.
  1. Park/neutral position switch assembly*1
  2. Back-up light switch assembly*2
Sends a signal that activates the TOYOTA parking assist-sensor system when the shift lever is moved to R.
  1. *1: for Automatic Transmission
  2. *2: for Manual Transmission

OPERATION EXPLANATION

  1. The clearance warning ECU determines whether the TOYOTA parking assist-sensor system should be operated based on the back sonar or clearance sonar switch on/off status and the shift position.

  2. When the system operates, the ECU transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within the range of one or more of the sensors, the waves are reflected back to the sensors, which transmit them to the ECU. Based on this information, the ECU sends signals to the clearance warning buzzer. The approximate distance between the vehicle and obstacle is then indicated and the buzzer sounds.

    HINT:
    Refer to "Operation Check" for the detailed operation (LandCruiser RM000003QOH010X.html).