VEHICLE PROXIMITY NOTIFICATION SYSTEM TERMINALS OF ECU


  1. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

    B001LZUE02

    1. Disconnect the H183 vehicle approaching speaker controller 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
      H183-1 (IG) - Body ground BE - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      H183-7 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the H183 vehicle approaching speaker controller connector.

    4. 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
      H183-2 (STP) - H183-7 (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
      H183-3 (SP+) - H183-8 (SP-) R - W Vehicle approaching speaker output Vehicle approaching speaker operating

      A waveform synchronized with the sound is output.

      (See Waveform 1)
      H183-5 (SW) - H183-7 (GND) L - W-B Vehicle approaching speaker switch signal input Power switch on (IG), vehicle approaching speaker switch pressed 6 V or higher
      Power switch on (IG), vehicle approaching speaker switch not pressed Below 1 V
      H183-6 (SPD) - H183-7 (GND) V - W-B Speed signal input Power switch on (IG), wheel being rotated

      Pulse generation

      (See Waveform 2)
      H183-9 (PRST) - H183-7 (GND) Y - W-B SIL communication system Power switch on (IG), during transmission

      Pulse generation

      (See Waveform 3)
      H183-10 (IND) - H183-7 (GND) B - W-B Vehicle approaching speaker switch signal input Power switch on (IG), vehicle approaching speaker switch pressed Below 1.8 V
      Power switch on (IG), vehicle approaching speaker switch not pressed 11 to 14 V
      H183-11 (SFTP) - H183-7 (GND) GR - W-B Transmission shift main switch signal input Power switch on (IG), park(P) selected Below 2.5 V
      Power switch on (IG), park(P) not selected 8 V or higher
      H183-12 (OPSW) - H183-7 (GND) G - 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.


      1. B001MQX

        Waveform 1

        Item Condition
        Tool setting 1 V/DIV., 200 ms./DIV.
        Vehicle condition Vehicle approaching speaker operating
      2. B001LUEE10

        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. B001KA8E04

        Waveform 3

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