Home › Audio/Visual/Telematics › Park Assist/Monitoring › INTUITIVE PARKING ASSIST SYSTEM
Last Modified: 11-27-2007 1.6 D
Service Category: Audio/Visual/Telematics Section: Park Assist/Monitoring
Model Year: 2008 Model: LX570 Doc ID: RM0000035B9002X
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: SYSTEM DESCRIPTION (2008 LX570)

SYSTEM DESCRIPTION

1. GENERAL

(a) When the vehicle is driven at 9 km/h (5.6 mph) or less, the ultrasonic sensors detect any obstacles at the corners and rear of the vehicle. The system then informs the driver of the distance between the sensors and the obstacles as well as their positions by indicating them on the combination meter and by sounding a buzzer.

2. FUNCTION OF COMPONENTS

Components

Function

Ultrasonic sensor

The ultrasonic sensor sends and receives ultrasonic waves. Based on the received wave, the sensor calculates the approximate distance value between the vehicle and obstacle, and sends the distance value as a signal to the parking assist ECU.

Combination meter

Transmits a vehicle speed signal to the parking assist ECU.

Receives information from the parking assist ECU.

  • Displays the location of an obstacle and the approximate distance between the vehicle and obstacle.
  • Informs the driver if the ultrasonic sensors malfunction, or if they freeze or become dirty.

Clearance sonar main switch

Built into the drive monitor switch. Outputs the system ON/OFF signals to the parking assist ECU.

Parking assist ECU
  • Receives the signals from the ultrasonic sensors and sends the display signal to the combination meter.
  • Receives signals from the ultrasonic sensors and sends the display signal to the display and navigation module display*1 or multi-display*2.
  • Receives signals from the ultrasonic sensors and sends the buzzer signal to the No. 1 clearance warning buzzer.

Park/neutral position switch

Sends a signal that activates the intuitive parking assist system when the shift lever is moved to R.
  • Display and navigation module display*1
  • Multi-display*2

Receives the information from the parking assist ECU through the CAN.

  • Displays the location of an obstacle and the approximate distance between the vehicle and obstacle.
  • Informs the driver if the ultrasonic sensors malfunction, or if they freeze or become dirty.

No. 1 clearance warning buzzer

Sounds the buzzer to inform the driver according to the distance to the obstacle.

ECM

Transmits the shift position signal to the parking assist ECU.

Air conditioning amplifier

Transmits the ambient temperature to the parking assist ECU.

Main body ECU

Transmits the destination signal, dimmer signal and steering information to the parking assist ECU.

Windshield wiper ECU

Transmits wiper status signal to the parking assist ECU.

*1: w/ Navigation System

*2: w/o Navigation System

3. OPERATION EXPLANATION

(a) The parking assist ECU determines whether the intuitive parking assist system should be operated based on the clearance sonar main switch on/off status, the shift position and the vehicle speed.

(b) When the system operates, the parking assist ECU transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within one or more of the ranges, of the sensors the waves are reflected back to the sensors, which transmit them to the parking assist ECU. Based on this information, the parking assist ECU sends signals to the multi-information display, the display and navigation module display*1 or multi-display*2, and the No. 1 clearance warning buzzer. The approximate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds.

HINT:

Refer to "Operation Check" for the detailed operation PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: OPERATION CHECK (2008 LX570) .

*1: w/ Navigation System

*2: w/o Navigation System