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System Description [08/2021 - ]

WARNING: This page is about a different car, the 2024 Toyota 4Runner, 2023 Toyota 4Runner, and 2022 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. GENERAL 
    1. This system has front, passenger side, driver side and rear television camera assemblies mounted around the vehicle to display around the vehicle on the radio and display receiver assembly. The display panel also shows a composite view consisting of the area behind the vehicle and parking guidelines to assist the driver in parking the vehicle by monitoring the area around the vehicle.
    2. This system consists of the following components:
      1. Parking assist ECU
      2. Pattern select switch (panoramic view monitor switch)
      3. Rear television camera assembly
      4. Front television camera assembly
      5. Side television camera assembly LH
      6. Side television camera assembly RH
      7. Radio and display receiver assembly
      8. Steering sensor
      9. Skid control ECU (brake actuator assembly)*1 or skid control ECU (master cylinder solenoid)*2
        1. *1: for Vacuum Brake Booster
        2. *2: for Hydraulic Brake Booster
      10. Main body ECU (multiplex network body ECU)
      11. Clearance warning ECU assembly*
        1. *: w/ Clearance Sonar System
      12. ECM
      13. Blind spot monitor sensor LH
    3. This system is equipped with a self-diagnosis system, which is operated from a designated window that appears on the display panel, just as in the navigation system*1 or audio and visual system*2.
      1. *1: w/ Navigation System
      2. *2: w/o Navigation System
  2. FUNCTION OF COMPONENTS 
    1. The parking assist ECU controls the system by using information from the following components.
      GTY1027111Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Item Function
      Rear Television Camera Assembly
      • Mounted on the back door to transmit the rear view of the vehicle to the parking assist ECU.
      • Has a color video camera that uses a Complementary Metal Oxide Semiconductor (CMOS) and a wide-angle lens
      Front Television Camera Assembly Generates a video feed showing the front side of the vehicle and transmits the video to the parking assist ECU
      Side Television Camera Assembly LH Generates a video feed showing the left side of the vehicle and transmits the video to the parking assist ECU
      Side Television Camera Assembly RH Generates a video feed showing the right side of the vehicle and transmits the video to the parking assist ECU
      Parking Assist ECU
      • Turns the panoramic view monitor system ON and OFF according to the display conditions, based on the received pattern select switch (panoramic view monitor switch) signals, shift position signals, and vehicle speed signals
      • Sends the display request signals for the panoramic view and wide front view screen, two-side view screen, panoramic view and rear view screen, or moving view screen to the radio receiver assembly according to the display conditions, based on the received pattern select switch (panoramic view monitor switch) signals, shift position signals, and vehicle speed signals
      • Sends the display switching request signals for the panoramic view and wide front view screen, two-side view screen, panoramic view and rear view screen, or moving view screen to the radio receiver assembly according to the display conditions, based on the received outer mirror retraction signals
      • Displays the composite image of the surrounding area images taken by each camera and the image calculated from vehicle status information such as the steering angle signals on the radio and display receiver assembly screen
      • Renders each configuration in the diagnosis window and outputs the screen to the radio and display receiver assembly
      • Stops displaying the buttons and guidelines on the panoramic view and rear view monitor screen when the screen is being displayed and a back door open status signal is received
      • Stores each configuration setting from the diagnosis window
      Pattern Select Switch (Panoramic View Monitor Switch) Sends switch operation signals to the parking assist ECU
      Radio and Display Receiver Assembly Allows touch panel operations when the panoramic view monitor screen or diagnosis screen is displayed
      Steering Sensor Sends the steering angle signals and sensor status signals to the parking assist ECU via the CAN communication system
      Skid Control ECU (Brake Actuator Assembly)*1 Sends the vehicle speed signals, drive type signals, and system status signals to the parking assist ECU via the CAN communication system
      Skid Control ECU (Master Cylinder Solenoid)*2
      ECM
      • Sends the engine model signals, and system status signals to the parking assist ECU via the CAN communication system
      • Sends the shift position signals to the parking assist ECU via the CAN communication system
      Main Body ECU (Multiplex Network Body ECU)
      • Sends the back door courtesy light switch signal to the parking assist ECU via the CAN communication system
      • Sends the mirror retract request signal to the parking assist ECU via the CAN communication system
      Clearance Warning ECU Assembly*3 Sends information from each sonar via the CAN communication system
      Blind Spot Monitor Sensor LH Sends RCTA operation condition signals to the parking assist ECU via CAN communication.
      1. *1: for Vacuum Brake Booster
      2. *2: for Hydraulic Brake Booster
      3. *3: w/ Clearance Sonar System
  3. OPERATION EXPLANATION 
    1. The reverse position signal is sent from the shift lever position switch to the parking assist ECU when the shift lever is moved to R.
    2. An appropriate steering angle and timing information can be provided for the driver. This is based on the information from the steering angle sensor signal and the vehicle angle data signal that are sent to the parking assist ECU.

      HINT: 

      The steering angle sensor signal is used to control parking assist only for estimated guide line mode.

  4. COMMUNICATION SYSTEM OUTLINE 
    1. CAN communication system
      1. The panoramic view monitor system uses CAN communication for data communication between the parking assist ECU and other ECUs and between the parking assist ECU and each camera.
      2. If a problem occurs in the CAN communication line, the parking assist ECU outputs a CAN communication malfunction DTC (To check, use the Techstream).

        Refer to DTC CHECK / CLEAR [08/2021 - ] 

      3. If a problem occurs in the CAN communication line, the parking assist ECU outputs a CAN communication malfunction DTC (To check, use the radio and display receiver assembly diagnosis screen).

        Refer to DIAGNOSIS SYSTEM [08/2021 - 08/2022] , or refer to DIAGNOSIS SYSTEM [08/2022 - ]

      4. If a CAN communication line malfunction DTC is output, repair the malfunction in the communication line and troubleshoot the panoramic view monitor system when data communication is normal.
      5. Since the CAN communication line has its own length and route, it cannot be repaired temporarily with a bypass wire, etc.
  5. VIDEO SIGNALS 
    1. Video signal circuit
      GTY847371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Video signals from the front television camera assembly are input into the parking assist ECU via analog communication lines (vehicle wire harness).
      2. Video signals from the side television camera assembly LH are input into the parking assist ECU via analog communication lines (vehicle wire harness).
      3. Video signals from the side television camera assembly RH are input into the parking assist ECU via analog communication lines (vehicle wire harness).
      4. Video signals from the rear television camera assembly are input into the parking assist ECU via analog communication lines (vehicle wire harness).
      5. Video signals from the parking assist ECU are input into the radio and display receiver assembly via GVIF cable.
    2. Screen display
      1. Video signals input from each camera are processed in the parking assist ECU and displayed on the radio and display receiver assembly as the panoramic view monitor system screen.
  6. DIAGNOSTIC FUNCTION OUTLINE 
    1. This panoramic view monitor system has a diagnostic function displayed in the multi-media module receiver assembly. This function enables the calibration (adjustment and verification) of the panoramic view monitor system.
    2. The panoramic view monitor system can check the following items by using the Techstream.
      Item Proceed to
      DTC Refer to DTC CHECK / CLEAR [08/2021 - ] 
      Data List / Active Test Refer to DATA LIST / ACTIVE TEST [08/2021 - ] 
  7. CALIBRATION 
    1. Use the panoramic view monitor system diagnosis screen for calibration and checking of the panoramic view monitor system.

      Refer to DIAGNOSIS SYSTEM [08/2021 - ] 

      NOTE:

      Part replacement and work performed during servicing may require calibration of the panoramic view monitor system and other systems.

      Refer to INITIALIZATION [08/2019 - 08/2022] , or refer to INITIALIZATION [08/2022 - ]

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