VEHICLE PROXIMITY NOTIFICATION SYSTEM (w/ Customization Function) TERMINALS OF ECU


  1. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

    A01HUKLE20

    1. Disconnect the I71 vehicle approaching speaker controller connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I71-1 (IG) - Body ground B - Body ground IG 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 in the wire harness.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I71-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    4. Reconnect the I71 vehicle approaching speaker controller connector.

    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I71-2 (STP) - I71-7 (GND) L - W-B Stop light signal input Power switch off, brake pedal depressed 8 V or higher
      Power switch off, brake pedal released Below 1 V
      I71-3 (SP+) - I71-8 (SP-) LG - P Vehicle approaching speaker output Vehicle approaching speaker operating

      A waveform synchronized with the sound is output.

      (See Waveform 1)
      I71-6 (SPD) - I71-7 (GND) V - W-B Speed signal input Power switch on (IG), wheel being rotated

      Pulse generation

      (See Waveform 2)
      I71-9 (PRST) - I71-7 (GND) GR - W-B SIL communication system Power switch on (IG), during transmission

      Pulse generation

      (See Waveform 3)
      I71-11 (SFTP) - I71-7 (GND) R - W-B Transmission shift main switch signal input Power switch on (IG), shift lever in P Below 2.5 V
      Power switch on (IG), shift lever not in P 8 V or higher
      I71-12 (OPSW) - I71-7 (GND) B - W-B Engine oil pressure switch signal input Idling* 8 V or higher
      Power switch on (IG) Below 2 V

      *: Put the engine in inspection mode Click here.

      If the result is not as specified, there is a problem in the vehicle approaching speaker controller or wire harness.


      1. A01HTVY

        Waveform 1

        Item Condition
        Tool setting 1 V/DIV., 200 ms./DIV.
        Vehicle condition Vehicle approaching speaker operating
      2. A01HU2FE02

        Waveform 2

        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Power switch on (IG), wheel being rotated

        Tech Tips

        When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

      3. A01HT4ME01

        Waveform 3

        Item Condition
        Tool setting 5 V/DIV., 10 ms./DIV.
        Vehicle condition Power switch on (IG), during transmission