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Terminals Of Ecu [10/2022 - ]

  1. CHECK VEHICLE APPROACHING SPEAKER CONTROLLER 
    GTY846337Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the A50 vehicle approaching speaker controller connector.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      A50-1 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      A50-6 (GND) - Body ground Ground Always Below 1 Ω
    3. Connect the A50 vehicle approaching speaker controller connector.
    4. Check the signal waveform and check for pulses according to the condition(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      A50-7 (SP+) - A50-8 (SP-) Vehicle approaching speaker assembly output Vehicle approaching speaker assembly operating A waveform synchronized with the sound is output.
      (See Waveform)
      A50-3 (CANH) - A50-6 (GND) CAN communication line Ignition switch ON Pulse generation
      A50-4 (CANL) - A50-6 (GND) CAN communication line Ignition switch ON Pulse generation
      1. Waveform
        GTY914305Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Condition
        Tester Connection A50-7 (SP+) - A50-8 (SP-)
        Tool Setting 1 V/DIV., 500 ms./DIV.
        Condition Vehicle approaching speaker assembly operating
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