PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK SEAT BELT CONTROL ECU

    A003ZLZE38

    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
      H6-7 (+B) - Body ground B - Body ground Auxiliary battery voltage Power switch off 11 to 14 V
      H6-8 (PGND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      H7-8 (IG1) - Body ground L - 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 voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H6-2 (MOR+) - H6-1 (MOR-) B - W Seat belt motor RH power supply Power switch on (IG) 4.0 to 8.5 V
      Power switch off Below 1 V
      H6-3 (MOL+) - H6-4 (MOL-) B - W Seat belt motor LH power supply Power switch on (IG) 4.0 to 8.5 V
      Power switch off Below 1 V

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

  2. CHECK DRIVING SUPPORT ECU

    A003XFGE17

    1. Disconnect the driving support ECU connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H5-25 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      H5-5 (PBSW)* - Body ground L - Body ground Pre-crash brake cancel switch Pre-crash brake cancel switch assembly on Below 1 Ω
      Pre-crash brake cancel switch assembly off 10 kΩ or higher

      *: w/ Pre-crash Brake

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

    3. Reconnect the connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      H5-17 (CA2L) - H5-25 (GND) B - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 1)
      H5-7 (MODE) - Body ground R - 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
      H5-16 (LRDD) - Body ground SB - Body ground Driving support ECU communication signal Power switch on (IG)

      Pulse generation

      (See waveform 2)
      H5-38 (LRRD) - Body ground R - Body ground Driving support ECU communication signal Power switch on (IG)

      Pulse generation

      (See waveform 3)
      H5-23 (CCS) - H5-25 (GND) LG - W-B Cruise control main switch signal Power switch on (IG) 10 to 14 V
      H5-23 (CCS) - H5-25 (GND) LG - W-B Cruise control main switch signal

      Power switch on (IG),

      CANCEL switch on

      		 6.6 to 10.1 V
      H5-23 (CCS) - H5-25 (GND) LG - W-B Cruise control main switch signal

      Power switch on (IG),

      Main switch on

      		 Below 1 V
      H5-39 (CA2H) - H5-25 (GND) L - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 4)
    5. A003Z16E19

      Waveform 1


      1. CAN communication signal

        Item Content
        Driving Support ECU Terminal Name Between CA2L and GND
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    6. A003XFBE06

      Waveform 2

      Item Content
      Driving Support ECU Terminal Name Between LRDD and GND
      Tester Range 2 V/DIV., 10 μsec./DIV.
      Condition Power switch on (IG)
    7. A003Z0IE05

      Waveform 3

      Item Content
      Driving Support ECU Terminal Name Between LRRD and GND
      Tester Range 2 V/DIV., 10 μsec./DIV.
      Condition Power switch on (IG)
    8. A003YOBE17

      Waveform 4


      1. CAN communication signal

        Item Content
        Driving Support ECU Terminal Name Between CA2H and GND
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.