LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2017 >> NX 300h >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostics - Introduction >> Pre-Collision System >> Terminals Of Ecu [10/2014 - 09/2017] >> Terminals Of Ecu [10/2014 - 09/2017]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Terminals Of Ecu [10/2014 - 09/2017]

  1. CHECK DRIVING SUPPORT ECU ASSEMBLY 
    Fig 1: I19 Driving Support ECU Assembly Connector End View
    GTY521027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the I19 driving support ECU assembly connector.
      NOTE:

      If a load of more than 10 kg (22 lb.) is placed on the connector, it may break. Do not place more load than is necessary on the connector.

    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I19-5 (PBSW) - Body ground G - Body ground Pre-collision system switch signal Pre-collision system switch on Below 1 Ω
      Pre-collision system switch off 10 kΩ or higher
      I19-25 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I19-30 (B) - Body ground Y - Body ground Power source Power switch on (IG) 11 to 14 V
      Power 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 I19 driving support ECU assembly connector.
    4. Check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I19-17 (CA2L) - I19-25 (GND) W - W-B CAN communication signal Power switch on (IG) Pulse generation
      (See waveform 1)
      I19-18 (CA1N) - I19-25 (GND) B - W-B CAN communication signal Power switch on (IG) Pulse generation
      (See waveform 2)
      I19-39 (CA2H) - I19-25 (GND) V - W-B CAN communication signal Power switch on (IG) Pulse generation
      (See waveform 3)
      I19-40 (CA1P) - I19-25 (GND) L - W-B CAN communication signal Power switch on (IG) Pulse generation
      (See waveform 4)
    5. Waveform 1
      Fig 2: Waveform 1
      GTY340408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection I19-17 (CA2L) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    6. Waveform 2
      Fig 3: Waveform 2
      GTY340408Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection I19-18 (CA1N) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    7. Waveform 3
      Fig 4: Waveform 3
      GTY340295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection I19-39 (CA2H) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

    8. Waveform 4
      Fig 5: Waveform 4
      GTY340295Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. CAN communication signal
        Item Content
        Tester Connection I19-40 (CA1P) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        HINT: 

        The waveform varies depending on the CAN communication signal.

scientia non olet · About LEMON Manuals