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Terminals Of Ecu [12/2019 - 11/2023]

  1. CLEARANCE WARNING ECU ASSEMBLY 
    GTY922317Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the H46 clearance warning ECU assembly connector.
    2. Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H46-1 (IG) - H46-28 (E) IG power source signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V*1
      10.5 to 16 V*2
      H46-28 (E) - Body ground Ground Always Below 1 Ω
      1. *1: w/o Stop and Start System
      2. *2: w/ Stop and Start System
    3. Reconnect the H46 clearance warning ECU assembly connector.
    4. Measure the voltage and resistance check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H46-2 (BOF) - H46-28 (E) Power source for front sensor circuit Ignition switch off Below 1 V
      • Ignition switch ON
      • Intuitive parking assist system on
      		 11 to 14 V
      H46-4 (E5) - H46-28 (E) Ground for front clearance sonar Always Below 1 Ω
      H46-3 (SOF) - H46-28 (E) Front sensor communication signal (Front clearance sonar sensor)
      • Ignition switch ON
      • Intuitive parking assist system on
      • Shift lever in any position other than P or R
      • Vehicle speed is less than approximately 10 km/h (6 mph)
      		 Pulse generation
      (Refer to waveform 1)
      H46-9 (CBZ) - H46-8 (EF) No. 1 clearance warning buzzer signal Buzzer sounding Pulse generation
      (Refer to waveform 2)
      H46-25 (BBZ) - H46-26 (ER) No. 2 clearance warning buzzer signal Buzzer sounding Pulse generation
      (Refer to waveform 2)
      H46-19 (BOR) - H46-28 (E) Power source for rear sensor circuit Ignition switch off Below 1 V
      • Ignition switch ON
      • Intuitive parking assist system on
      		 11 to 14 V
      H46-21 (E1) - H46-28 (E) Ground for rear clearance sonar Always Below 1 Ω
      H46-20 (SOR) - H46-28 (E) Rear sensor communication signal (Rear clearance sonar sensor)
      • Ignition switch ON
      • Intuitive parking assist system on
      • Shift lever in R
      • Vehicle speed is less than approximately 10 km/h (6 mph)
      		 Pulse generation
      (Refer to waveform 1)
    5. Using an oscilloscope, check waveform 1.
      1. Waveform 1 (Reference)
        GTY637360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Content
        Measurement terminal
        • CH1: H46-3 (SOF) - H46-28 (E)
        • CH2: H46-20 (SOR) - H46-28 (E)
        Measurement setting 5 V/DIV., 1 ms./DIV.
        Condition
        • Ignition switch ON
        • Intuitive parking assist system on
        • Shift lever in any position other than P or R (CH1)
        • Shift lever in R (CH2)
        • Vehicle speed is less than approximately 10 km/h (6 mph)

        HINT: 

        The waveforms for CH1 and CH2 are same.

    6. Using an oscilloscope, check waveform 2.
      1. Waveform 2 (Reference)
        GTY573419Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Content
        Measurement terminal H46-9 (CBZ) - H46-8 (EF)
        H46-25 (BBZ) - H46-26 (ER)
        Measurement setting 2 V/DIV., 500 μs./DIV.
        Condition Buzzer sounding

        HINT: 

        The amplitude of the waveform changes according to the set volume.

  2. BLIND SPOT MONITOR SENSOR RH (A) 

    Refer to TERMINALS OF ECU [12/2019 - 11/2023]

  3. BLIND SPOT MONITOR SENSOR LH (B) 

    Refer to TERMINALS OF ECU [12/2019 - 11/2023]

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