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Terminals Of Ecu [09/2014 - 11/2017]

  1. CHECK DRIVING SUPPORT ECU ASSEMBLY 
    GTY513530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the Q1 driving support ECU assembly connector.
      NOTE:

      Do not apply excessive force to the connector. If a force of 10 kg or more is applied, the connector may break.

    2. Measure the resistance and 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
      Q1-5 (PBSW) - Body ground V - Body ground Pre-collision system cancel switch assembly signal Pre-collision system cancel switch assembly on Below 1 Ω
      Pre-collision system cancel switch assembly off 10 kΩ or higher
      Q1-25 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      Q1-30 (B) - Body ground B - Body ground Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V

      HINT: 

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

    3. Reconnect the Q1 driving support ECU assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      Q1-17 (CA2L) - Q1-25 (GND) B - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 1)
      Q1-18 (CA1N) - Q1-25 (GND) G - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 2)
      Q1-39 (CA2H) - Q1-25 (GND) G - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 3)
      Q1-40 (CA1P) - Q1-25 (GND) B - BR CAN communication signal Engine switch on (IG) Pulse generation
      (See waveform 4)
    5. Waveform 1
      GTY340408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection Q1-17 (CA2L) - Q1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    6. Waveform 2
      GTY340408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection Q1-18 (CA1N) - Q1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)
    7. Waveform 3
      GTY340295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection Q1-39 (CA2H) - Q1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    8. Waveform 4
      GTY340295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection Q1-40 (CA1P) - Q1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)
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