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Terminals Of Ecu [08/2019 - ]

  1. CHECK MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    Fig 1: Millimeter Wave Radar Sensor Assembly Terminal End View
    GTY946803Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:
    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
    • Do not apply excessive force to the forward recognition camera connector.
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A70-1 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      A70-8 (IGB) - A70-1 (SGND) G - W-B Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
    2. Check for pulses according to the value(s) in the table below.

      HINT: 

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the millimeter wave radar sensor assembly is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A70-2 (CA2L) - A70-1 (SGND) V - W-B CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 2)
      A70-3 (CA2H) - A70-1 (SGND) BR - W-B CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 1)
      A70-5 (CA1P) - A70-1 (SGND) L - W-B CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 1)
      A70-6 (CA1N) - A70-1 (SGND) GR - W-B CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 2)
      1. Waveform 1
        Fig 2: Waveform 1
        GTY856789Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Content
        Tester Connection
        • Between A70-3 (CA2H) and A70-1 (SGND)
        • Between A70-5 (CA1P) and A70-1 (SGND)
        Tool Setting 1 V/DIV., 10 μs./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

      2. Waveform 2
        Fig 3: Waveform 2
        GTY851182Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Content
        Tester Connection
        • Between A70-2 (CA2L) and A70-1 (SGND)
        • Between A70-6 (CA1N) and A70-1 (SGND)
        Tool Setting 1 V/DIV., 10 μs./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

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