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Terminals Of Ecu

  1. CHECK CLEARANCE WARNING ECU 
    Fig 1: Identifying Clearance Warning ECU Terminal
    G04050569Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TCLEARANCE WARNING ECU

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    IG (Q37-8) - E (Q37-27) Y - W-B IG signal / IG power source Engine switch on (IG) 10 to 14 V
    E (Q37-27) - Body ground W-B - Body ground ECU ground Always Below 1 ohms
    S1 (Q37-5) - E1 (Q37-18) Y - BR Ultrasonic sensor (Front right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see Fig 2 )
    S4 (Q37-6) - E4 (Q37-19) GR - BR Ultrasonic sensor (Front left sensor) Signals are transmitted from ECU to front left center sensor (During OFF sensing) Pulse generation (see Fig 2 )
    S5 (Q37-2) - E5 (Q37-15) GR - W Ultrasonic sensor (Rear right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see Fig 2 )
    S6 (Q37-4) - E6 (Q37-17) P - W Ultrasonic sensor (Rear left sensor) Signals are transmitted from ECU to front left sensor (During OFF sensing) Pulse generation (see Fig 2 )
    S7 (Q37-1) - E7 (Q37-14) R - W Ultrasonic sensor (Rear right center sensor) Signals are transmitted from ECU to rear right center sensor (During OFF sensing) Pulse generation (see Fig 2 )
    S8 (Q37-3) - E8 (Q37-16) G - W Ultrasonic sensor (Rear left center sensor) Signals are transmitted from ECU to rear left center sensor (During OFF sensing) Pulse generation (see Fig 2 )
    E1 (Q37-18) - Body ground BR - Body ground Ultrasonic sensor (Front right sensor) ground Always Bellow 1 ohms
    E4 (Q37-19) - Body ground BR - Body ground Ultrasonic sensor (Front left sensor) ground Always Below 1 ohms
    E5 (Q37-15) - Body ground W - Body ground Ultrasonic sensor (Rear right sensor) ground Always Bellow 1 ohms
    E6 (Q37-17) - Body ground W - Body ground Ultrasonic sensor (Rear left sensor) ground Always Bellow 1 ohms
    E7 (Q37-14) - Body ground W - Body ground Ultrasonic sensor (Rear right center sensor) ground Always Bellow 1 ohms
    E8 (Q37-16) - Body ground W - Body ground Ultrasonic sensor (Rear left center sensor) ground Always Bellow 1 ohms
    CBZ (Q37-9) - E (Q37-27) O - W-B Buzzer output Buzzer sounding Pulse generation (see Fig 3 )
    M+ (Q37-26) - E (Q37-27) BR - W-B BEAN communication Engine switch on (IG), clearance sonar main switch ON Pulse generation
    1. Reference:
      1. Waveform 1
        WAVEFORM 1

        Item Content
        Symbols (Terminal No.) S1 (Q37-5) - E1 (Q37-18)
        S4 (Q37-6) - E4 (Q37-19)
        S5 (Q37-2) - E5 (Q37-15)
        S6 (Q37-4) - E6 (Q37-17)
        S7 (Q37-1) - E7 (Q37-14)
        S8 (Q37-3) - E8 (Q37-16)
        Tool Setting 2V/DIV., 100 sec./DIV.
        Condition Signals are transmitted from ECU to sensor (During OFF sensing)
        Fig 2: Identifying Waveform 1 Graph
        G04050570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2
    WAVEFORM 2

    Item Content
    Symbols (Terminal No.) CBZ (Q37-9) - E (Q37-27)
    Tool Setting 2 V/DIV., 1 msec./DIV.
    Condition Buzzer sounding
    Fig 3: Identifying Waveform 2 Graph
    G04050571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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