PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK SEAT BELT CONTROL ECU

    A01ND8ME17

    1. Disconnect the seat belt control ECU connectors.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F57-7 (+B) - Body ground B - Body ground Battery voltage Always 11 to 14 V
      F57-8 (PGND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      F56-8 (IG1) - Body ground Y - Body ground Seat belt control ECU power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

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

    3. Reconnect the connectors.

    4. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F57-2 (MOR+) - F57-1 (MOR-) R - GR Seat belt motor RH power supply Power switch on (IG) 4.0 to 8.5 V
      Power switch off Below 1 V
      F57-3 (MOL+) - F57-4 (MOL-) L - V Seat belt motor LH power supply Power switch on (IG) 4.0 to 8.5 V
      Power switch off Below 1 V
      F56-5 (PBK+) - Body ground L - Body ground Front seat inner belt assembly line

      • Power switch on (IG)

      • Fasten passenger side seat belt

      Pulse generation

      (see waveform 1)
      F56-6 (PBK-) - Body ground P - Body ground Front seat inner belt assembly line

      • Always

      		 Below 1 Ω

      If the result is not as specified, the seat belt control ECU may be malfunctioning.

    5. Inspect using an oscilloscope.


      1. Waveform 1 (Reference)

        A01NDCIE01
        Terminal F56-5 (PBK+) - Body ground
        Tool Setting 2V/DIV., 20 ms./DIV.
        Condition Power switch on (IG), fasten passenger side seat belt

  2. CHECK DRIVING SUPPORT ECU

    A01NEFXE02

    1. Disconnect the driving support ECU 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
      C1-30 (B) - Body ground P - Body ground Power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      C1-25 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Connect the driving support ECU connector.

    4. Turn the power switch on (IG).

    5. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      C1-7 (MODE) - Body ground Y - Body ground MODE signal

      • -Power switch on (IG)

      • -MODE switch off

      		 11 to 14 V

      • -Power switch on (IG)

      • -MODE switch on

      		 Below 1 V
      C1-16 (LRDD) - Body ground GR - Body ground Driving support ECU communication signal Power switch on (IG)

      Pulse generation

      (see waveform 2)
      C1-38 (LRRD) - Body ground LG - Body ground Driving support ECU communication signal Power switch on (IG)

      Pulse generation

      (see waveform 3)

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

    6. Inspect using an oscilloscope.


      1. A01NF88E06

        Waveform 2 (Reference)

        Terminal C1-16 (LRDD) - Body ground
        Tool Setting 2V/DIV., 10 ms./DIV.
        Condition Power switch on (IG)

    7. Inspect using an oscilloscope.


      1. A01NFZOE05

        Waveform 3 (Reference)

        Terminal C1-38 (LRRD) - Body ground
        Tool Setting 2V/DIV., 10 ms./DIV.
        Condition Power switch on (IG)