PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK SEAT BELT CONTROL ECU

    A01GXDEE01

    1. Disconnect the S45 and S47 ECU connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S45-7 (+B) - Body ground B - Body ground Battery Always 11 to 14 V
      S45-8 (PGND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      S47-8 (IG1) - Body ground G - Body ground Seat belt control ECU power supply Power switch on (IG) 11 to 14 V
      S47-8 (IG1) - Body ground G - Body ground Seat belt control ECU power supply 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 S45 and S47 connectors.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      S45-2 (MOR+) - S45-1 (MOR-) R - G Seat belt motor RH power supply Power switch on (IG) 4.0 to 8.5 V
      S45-2 (MOR+) - S45-1 (MOR-) R - G Seat belt motor RH power supply Power switch off Below 1 V
      S45-3 (MOL+) - S45-4 (MOL-) W - L Seat belt motor LH power supply Power switch on (IG) 4.0 to 8.5 V
      S45-3 (MOL+) - S45-4 (MOL-) W - L Seat belt motor LH power supply Power switch off Below 1 V

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

  2. CHECK DRIVING SUPPORT ECU

    A01H02PE01

    1. Disconnect the A33 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      A33-13 (B) - Body ground Y - Body ground Power supply Power switch on (IG) 11 to 14 V
      A33-13 (B) - Body ground Y - Body ground Power supply Power switch off Below 1 V
      A33-25 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      A33-11 (STP-) - Body ground BE - Body ground Stop light switch signal input Brake pedal is depressed 11 to 14 V
      A33-11 (STP-) - Body ground BE - Body ground Stop light switch signal input Brake pedal is released Below 1 V
      A33-34 (ST1-) - Body ground G - Body ground Stop light switch signal input

      Power switch on (IG),

      brake pedal is released

      		 11 to 14 V
      A33-34 (ST1-) - Body ground G - Body ground Stop light switch signal input

      Power switch on (IG),

      brake pedal is depressed

      		 Below 1 V
      A33-6 (FCAS) - Body ground L - Body ground Pre-crash brake cancel switch signal Pre-crash brake cancel switch ON Below 1 Ω
      A33-6 (FCAS) - Body ground L - Body ground Pre-crash brake cancel switch signal Pre-crash brake cancel switch OFF 10 kΩ or higher

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

  3. CHECK ACTIVE HEADREST CONTROL ECU LH

    A01GXJ8E01

    1. Disconnect the e73 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e73-3 (IG1) - Body ground V - Body ground Active headrest control ECU LH power supply Power switch on (IG) 11 to 14 V
      e73-3 (IG1) - Body ground V - Body ground Active headrest control ECU LH power supply Power switch off Below 1 V
      e73-1 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      e73-4 (LSW) - Body ground* W-B - Body ground Terminal for identification of front LH Always Below 1 Ω

      Tech Tips

      *: Terminal LSW is used for distinguishing between the active headrest control ECU LH and RH. Terminal LSW of the active headrest control ECU LH is connected.

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

  4. CHECK ACTIVE HEADREST CONTROL ECU RH

    A01GXJ8E02

    1. Disconnect the e60 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      e60-3 (IG1) - Body ground L - Body ground Active headrest control ECU RH power supply Power switch on (IG) 11 to 14 V
      e60-3 (IG1) - Body ground L - Body ground Active headrest control ECU RH power supply Power switch off Below 1 V
      e60-1 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

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

  5. CHECK OBJECT RECOGNITION ECU

    A01H20OE09

    1. Disconnect the p1 ECU connector.

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

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      p1-6 (IG) - Body ground V - Body ground Object recognition ECU power supply Power switch on (IG) 11 to 14 V
      p1-6 (IG) - Body ground V - Body ground Object recognition ECU power supply Power switch off Below 1 V
      p1-10 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

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