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Terminals Of Ecu [08/2021 - 09/2022]

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  1. REAR TELEVISION CAMERA ASSEMBLY 
    1. Disconnect the T1 rear television camera assembly connector.
      Fig 1: Rear Television Camera Assembly Terminals Of ECU [08/2021 - 09/2022]
      GTY831925Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage on the wire harness side connector according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      T1-6 (CB+) - Body ground GR - Body ground Power source Engine switch on (ACC) 5.5 to 7.05 V

      If the result is not as specified, there may be a malfunction on the wire harness side.

    3. Reconnect the T1 rear television camera assembly connector.
    4. Check for pulses between each terminal of the connector.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      T1-3 (CV+) - T1-2 (CV-) B - G Video signal Engine switch on (IG)
      Shift lever in R
      Camera lens not covered, displaying image      		 Pulse generation
      (Refer to waveform 1)
      Engine switch on (IG)
      Shift lever in R
      Camera lens covered, blacking out screen      		 Pulse generation
      (Refer to waveform 2)
      T1-5 (CGND) - Body ground BR - Body ground Camera ground Always Below 1 V

      HINT: 

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the multi-display assembly with the connector connected.

      If the result is not as specified, the rear television camera assembly may be malfunctioning.

    5. Reference (Oscilloscope waveform):
      Fig 2: Waveform 1 & Waveform 2 [08/2021 - 09/2022]
      GTY453123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Waveform 1 (camera lens is not covered, displaying an image)
      *b Waveform 2 (camera lens is covered, blacking out the screen)
      *c Synchronization Signal
      *d Video Waveform

      HINT: 

      A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the multi-display assembly with the connector connected.

      1. Waveform 1 (camera lens is not covered, displaying an image)
        Item Content
        Measurement terminal T1-3 (CV+) - T1-2 (CV-)
        Measurement setting 200 mV/DIV., 50 μs./DIV.
        Condition Engine switch on (IG), shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the engine switch is on (ACC).
      2. Waveform 2 (camera lens is covered, blacking out the screen)
        Item Content
        Measurement terminal T1-3 (CV+) - T1-2 (CV-)
        Measurement setting 200 mV/DIV., 50 μs./DIV.
        Condition Engine switch on (IG), shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the engine switch is on (ACC).
  2. MULTI-DISPLAY ASSEMBLY 
    Fig 3: Multi-Display Assembly Terminals Of ECU [08/2021 - 09/2022]
    GTY832133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    G22-3 (REV) - G22-13 (GND1) P - LA Reverse signal Engine running, shift lever not in R → in R 3.5 V or higher → Below 1 V
    G22-8 (V+) - G22-13 (GND1) B - LA Video signal Engine switch on (IG)
    Shift lever in R
    Camera lens not covered, displaying image    		 Pulse generation
    (Refer to waveform 1)
    Engine switch on (IG)
    Shift lever in R
    Camera lens covered, blacking out screen    		 Pulse generation
    (Refer to waveform 2)
    G22-9 (V-) - G22-13 (GND1) W - LA Ground Always Below 1 V
    G22-10 (CA+) - G22-21 (CGND) R - G Television camera assembly power supply Engine switch on (ACC) 5.5 to 7.05 V
    G22-14 (CSWA) - G22-13(GND1)* P - LA Camera image change signal Engine running
    Parking support alert (static objects) image not being displayed → Parking support alert (static objects) image being displayed    		 3.5 V or higher → Below 1 V
    G22-20 (CSLD) - Body ground Shielded - Body ground Shield ground Always Below 1 Ω
    G22-21 (CGND) - Body ground G - Body ground Camera ground Always Below 1 Ω
    G113-3 (GVG1) Shielded Shield ground - -
    1. *: w/ Parking Support Alert System
    1. Reference (Oscilloscope waveform):
      1. Waveform 1 (camera lens not covered, displaying an image)
        Item Content
        Measurement terminal G22-8 (V+) - G22-13 (GND1)
        Measurement setting 200 mV/DIV., 50 μs/DIV.
        Condition Engine switch on (IG), shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the engine switch is on (ACC).
        Fig 4: Waveform 1 (Camera Lens Is Not Covered, Displaying An Image) & Waveform 2 (Camera Lens Is Covered, Blacking Out The Screen) [08/2021 - 09/2022]
        GTY453123Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Waveform 1 (camera lens is not covered, displaying an image)
        *b Waveform 2 (camera lens is covered, blacking out the screen)
        *c Synchronization Signal
        *d Video Waveform
      2. Waveform 2 (camera lens covered, blacking out the screen)
        Item Content
        Measurement terminal G22-8 (V+) - G22-13 (GND1)
        Measurement setting 200 mV/DIV., 50 μs/DIV.
        Condition Engine switch on (IG), shift lever in R

        HINT: 

        • The video waveform changes according to the image sent by the rear television camera assembly.
        • The video waveform is constantly output when the engine switch is on (ACC).
  3. CLEARANCE WARNING ECU (w/ Parking Support Alert System) 

    Refer to TERMINALS OF ECU [08/2021 - 09/2022]

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