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Terminals Of Ecu

  1. OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying T4 Connector Terminals Of ECU
    G05251687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU CONNECTOR TERMINAL DESCRIPTION CHART

    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
    T4-5 (GND) - Body ground W-B - Body ground Occupant classification ECU ground line Always Below 1 V
    T4-6 (PS) - T4-15 (GPS) LG - W Pressure sensor signal line Engine switch on (IG) 0 to 5V
    T4-7 (VPS) - T4-5 (GND) Y - W-B Pressure sensor +B line Engine switch on (IG) 4.75 to 5.25 V
    T4-8 (GBT) - T4-5 (GND) G - W-B Belt tension sensor ground line Always Below 1 V
    T4-9 (IG) - T4-5 (GND) B - W-B Occupant classification ECU +B line Engine switch on (IG) 10 to 14 V
    T4-10 (DIA) - T4-5 (GND) W - W-B Diagnosis (DLC3) Engine switch on (IG) Pulse generation
    T4-11 (FSR+) - T4-12 (FSR-) W - B Center airbag sensor assembly communication line Engine switch on (IG) Pulse generation
    T4-12 (FSR-) - T4-5 (GND) B - W-B Center airbag sensor assembly communication line (-) Always Below 1 V
    T4-13 (BSW) - T4-14 (BGND) B - GR Passenger side buckle switch line Engine switch on (IG) Low: 4 to 7 mA
    Hi: 12 to 18 mA
    T4-14 (BGND) - T4-5 (GND) GR - W-B Passenger side buckle switch ground line Always Below 1 V
    T4-15 (GPS) - T4-5 (GND) W - W-B Pressure sensor ground line Always Below 1 V
    T4-16 (BT) - T4-5 (GND) R - W-B Belt tension sensor signal line Engine switch on (IG) 0 to 5V
    T4-17 (VBT) - T4-5 (GND) P - W-B Belt tension sensor +B line Engine switch on (IG) 4.75 to 5.25 V
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