SIMPLE INTELLIGENT PARKING ASSIST SYSTEM SYSTEM DESCRIPTION

GENERAL

1. The simple intelligent parking assist system is a system that assists parallel parking operations by detecting a parking space and operating the steering wheel automatically. The No. 1 ultrasonic sensors (front side LH/RH) detect a space which the vehicle can be parked. After the detection, the parking assist operation starts when the shift lever is moved to R.

SYSTEM FUNCTION

1. The simple intelligent parking assist system has the following modes:

   Mode	Outline
   Parking Space Detection Mode	Obstructions such as parked vehicles, curbs and walls are detected by the No. 1 ultrasonic sensors (front side LH/RH) installed on the sides of the front bumper and whether the vehicle can be parked between two parked vehicles or in the space behind one parked vehicle is judged.
   Automatic Steering Mode	After a parking space is detected, the steering wheel is operated automatically when the shift lever is moved to R. During automatic steering mode, the Toyota parking assist-sensor system operates and obstructions such as parked vehicles, curbs and walls are detected. Based oh the Toyota parking assist-sensor system detection results, the multi-information display is changed and the No. 1 and No. 2 clearance warning buzzers are sounded to inform the driver to operate the shift lever.

FUNCTION OF COMPONENTS

1. The simple intelligent parking assist system consists of the following components:

   Component	Function
   Clearance Warning ECU Assembly	Controls the functions of the simple intelligent parking assist system based on signals from the ultrasonic sensors, switches and ECUs. Determines if enough parking space is available based on signals from the No. 1 ultrasonic sensors (front side LH/RH). Sends a message display request signal or buzzer sound signal to the combination meter assembly in accordance with the operation condition and state of the simple intelligent parking assist system. Controls the Toyota parking assist-sensor system during automatic steering mode, and sends a display request signal to the combination meter assembly or a buzzer sound signal to each clearance warning buzzer, in accordance with the position of an obstruction or the distance from the vehicle to the obstruction.
   No. 1 Ultrasonic Sensor Front Side LH/RH	Detect parked vehicles, curbs and walls, send information to the clearance warning ECU assembly. Detect the distance between the vehicle and an obstruction and send information to the clearance warning ECU assembly.
   No. 2 Ultrasonic Sensor Front Corner LH/RH Front Center LH/RH No. 3 Ultrasonic Sensor Rear Corner LH/RH Rear Center LH/RH	Detect the distance between the vehicle and an obstruction and send information to the clearance warning ECU assembly.
   IPA Main Switch Assembly	Operating this switch allows the operation of the simple intelligent parking assist system to be enabled or disabled.
   No. 1 Clearance Warning Buzzer	Sounds a buzzer in accordance with the distance to the obstruction in front of the vehicle to inform the driver.
   No. 2 Clearance Warning Buzzer	Sounds a buzzer in accordance with the distance to the obstruction behind the vehicle to inform the driver.
   Spiral Cable with Sensor Sub-assembly	Detects the angle of the steering wheel and sends the resulting signals to the clearance warning ECU assembly via CAN communication.
   Brake Booster with Master Cylinder Assembly Skid Control ECU	Sends the following signals to the clearance warning ECU assembly via CAN communication. Vehicle speed signal ABS/TRC/VSC operation signal
   Power Management Control ECU	Sends the following signals to the clearance warning ECU assembly via CAN communication. Shift state signal ENG/HV flag signal
   Combination Meter Assembly	Displays information on the multi-information display in accordance with the operation condition and state of the simple intelligent parking assist system, based on the received display request signal. Displays the position of an obstruction and the distance between the vehicle and the obstruction on the multi-information display. Displays information such as a malfunction of the ultrasonic sensor on the multi-information display to inform the driver. Sends turn signal switch signal to the clearance warning ECU assembly. The automatic steering mode indicator illuminates on the multi-information display when automatic steering is started while the simple intelligent parking assist system is operating. Sounds the buzzer in accordance with the operation condition and state of the simple intelligent parking assist system, based on the received buzzer sound signal.
   Main Body ECU (Multiplex Network Body ECU)	Sends the vehicle information (LHD/RHD) signal to the clearance warning ECU assembly via CAN communication.
   Air Conditioning Amplifier Assembly	Sends ambient temperature signal to the clearance warning ECU assembly via CAN communication to adjust the distance rate from the ultrasonic sensors.
   Power Steering ECU Assembly	Performs steering control upon receiving signals such as the steering control signal from the clearance warning ECU assembly. Sends vehicle condition signals such as the EPS fail-safe signal and steering control status signal to the clearance warning ECU assembly.

OPERATION DESCRIPTION