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Terminals Of Ecu

  1. CHECK CLEARANCE WARNING ECU 
    Fig 1: Identifying Clearance Warning ECU Connector Terminals
    G05299938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINALS REFERENCE CHART

    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 Engine 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  1waveform 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  2waveform 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  1waveform 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  2waveform 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  1waveform 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  2waveform 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  1waveform 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  2waveform 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  1waveform 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  1waveform 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  1waveform 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  1waveform 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  3waveform 3)
    M+ (A38-26) - E (A38-27) GR - W-B BEAN communication Engine switch on (IG), Clearance sonar main switch ON Pulse generation (see  4waveform 4)
    R1 (A38-23) - R2 (A38-24) B - W CAN communication Engine switch on (IG) Pulse generation (see  5waveform 5)
    1. Reference:
      1. Waveform 1
        WAVEFORM REFERENCE CHART

        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: Identifying Waveform 1 (Reference)
        G05299939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2
        WAVEFORM REFERENCE CHART

        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: Identifying Waveform 2 (Reference)
        G05299940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Waveform 3
        WAVEFORM REFERENCE CHART

        Item Content
        Symbols (Terminal No.) CBZ (A38-9) - E (A38-27)
        Tool Setting 2 V/DIV., 1 msec/DIV.
        Condition Buzzer sounding
        Fig 4: Identifying Waveform 3 (Reference)
        G05299941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      4. Waveform 4
        WAVEFORM REFERENCE CHART

        Item Content
        Symbols (Terminal No.) M+ (A38-26) - E (A38-27)
        Tool Setting 2 V/DIV., 1 msec./DIV.
        Condition Engine switch on (IG)
        Clearance sonar main switch ON
        Fig 5: Identifying Waveform 4 (Reference)
        G05299942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      5. Waveform 5
        WAVEFORM REFERENCE CHART

        Item Content
        Symbols (Terminal No.) R1 (A38-23) - R2 (A38-24)
        Tool Setting 2 V/DIV., 50 μsec./DIV.
        Condition Engine switch on (IG)
    Fig 6: Identifying Waveform 5 (Reference)
    G05299943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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