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Terminals Of Ecu

  1. CHECK CLEARANCE WARNING ECU 
    Fig 1: Identifying Clearance Warning ECU Connector
    G05820130Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINALS REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG (A38-8) - E (A38-27) G-Y - W-B IG signal / IG power source Power switch on (IG) 10 to 14 V
    E (A38-27) - Body ground W-B - Body ground ECU ground Always Below 1 Ω
    S1 (A38-1)-EF(A38-14) GR - BR No. 3 ultrasonic sensor (Front right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    T1 (A38-2) - EF (A38-14) L-W - BR No. 3 ultrasonic sensor (Front right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see  bwaveform 2)
    S2 (A38-3) - EF (A38-14) R - BR No. 3 ultrasonic sensor (Front right center sensor) Signals are transmitted from ECU to front right center sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    T2 (A38-4) - EF (A38-14) R-L - BR No. 3 ultrasonic sensor (Front right center sensor) Signals are transmitted from ECU to front right center sensor (During OFF sensing) Pulse generation (see  bwaveform 2)
    S3 (A38-5) - EF (A38-14) G - BR No. 3 ultrasonic sensor (Front left center sensor) Signals are transmitted from ECU to front left center sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    T3 (A38-6) - EF (A38-14) G-R - BR No. 3 ultrasonic sensor (Front left center sensor) Signals are transmitted from ECU to front left center sensor (During OFF sensing) Pulse generation (see  bwaveform 2)
    S4 (A38-7) - EF (A38-14) P-L - BR No. 3 ultrasonic sensor (Front left sensor) Signals are transmitted from ECU to front left sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    T4 (A38-21) - EF (A38-14) V - BR No. 3 ultrasonic sensor (Front left sensor) Signals are transmitted from ECU to front left sensor (During OFF sensing) Pulse generation (see  bwaveform 2)
    EF (A38-14) - Body ground BR - Body ground No. 3 ultrasonic sensor ground Always Below 1 Ω
    S5 (A38-10) - ER (A38-29) GR - LG No. 1 ultrasonic sensor (Rear right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    S6 (A38-11) - ER (A38-29) W - LG No. 1 ultrasonic sensor (Rear left sensor) Signals are transmitted from ECU to front left sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    S7 (A38-12) - ER (A38-29) B - LG No. 2 ultrasonic sensor (Rear right center sensor) Signals are transmitted from ECU to rear right center sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    S8 (A38-13) - ER (A38-29) R-B - LG No. 2 ultrasonic sensor (Rear left center sensor) Signals are transmitted from ECU to rear left center sensor (During OFF sensing) Pulse generation (see  awaveform 1)
    ER (A38-29) - Body ground LG - Body ground No. 1 ultrasonic sensor, No. 2 ground Always Below 1 Ω
    CBZ (A38-9) - E (A38-27) W - W-B Buzzer output Buzzer sounding Pulse generation (see  cwaveform 3)
    M+ (A38-26) - E (A38-27) GR - W-B BEAN communication Power switch on (IG), Clearance sonar main switch ON Pulse generation (see  dwaveform 4)
    R1 (A38-23) - R2 (A38-24) W - B CAN communication Power switch on (IG) Pulse generation (see  ewaveform 5)
    1. Using an oscilloscope, check the waveform 1.

      Waveform 1 (Reference) 

      WAVEFORM REFERENCE 1

      Item Content
      Symbols (Terminal No.) S1 (A38-1) - EF (A38-14)
      S2 (A38-3) - EF (A38-14)
      S3 (A38-5) - EF (A38-14)
      S4 (A38-7) - EF (A38-14)
      S5 (A38-10) - ER (A38-29)
      S6 (A38-11) - ER (A38-29)
      S7 (A38-12) - ER (A38-29)
      S8 (A38-13) - ER (A38-29)
      Tool Setting 2V/DIV., 100 μsec./DIV.
      Condition Signals are transmitted from ECU to sensor (During OFF sensing)
      Fig 2: Waveform Graph 1
      G05820131Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Using an oscilloscope, check the waveform 2.

      Waveform 2 (Reference) 

      WAVEFORM REFERENCE 2

      Item Content
      Symbols (Terminal No.) T1 (A38-2) - EF (A38-14)
      T2 (A38-4) - EF (A38-14)
      T3 (A38-6) - EF (A38-14)
      T4 (A38-21) - EF (A38-14)
      Tool Setting 2V/DIV., 100 μsec./DIV.
      Condition Signals are transmitted from ECU to sensor (During OFF sensing)
      Fig 3: Waveform Graph 2
      G05820132Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using an oscilloscope, check the waveform 3.

      Waveform 3 (Reference) 

      WAVEFORM REFERENCE 3

      Item Content
      Symbols (Terminal No.) CBZ (A38-9) - E (A38-27)
      Tool Setting 2V/DIV., 1 msec./DIV.
      Condition Buzzer sounding
      Fig 4: Waveform Graph 3
      G05820133Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Using an oscilloscope, check the waveform 4.

      Waveform 4 (Reference) 

      WAVEFORM REFERENCE 4

      Item Content
      Symbols (Terminal No.) M+ (A38-26) - E (A38-27)
      Tool Setting 2 V/DIV., 1 msec./DIV.
      Condition Power switch on (IG) Clearance sonar main switch ON
      Fig 5: Waveform Graph 4
      G05820134Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Using an oscilloscope, check the waveform 5.

      Waveform 5 (Reference) 

      WAVEFORM REFERENCE 5

      Item Content
      Symbols (Terminal No.) R1 (A36-23) - R2 (A38-24)
      Tool Setting 2 V/DIV., 50 μsec/DIV.
      Condition Power switch on (IG)
      Fig 6: Waveform Graph 5
      G05820135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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