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Terminals Of Ecu

  1. CHECK OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Z8 And L27 Connector Terminal
    G05402241Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION CHART

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specification
    L27-1 (+B) - L27-3 (GND) V - W-B Battery Ignition switch ON 11 to 14 V
    L27-2 (DIA) - L27-3 (GND) G - W-B Diagnosis (DLC3) Ignition switch ON Pulse generation
    L27-3 (GND) - Body ground W-B - Body ground Ground Always Below 1Ω
    L27-4 (FSR-) - L27-3 (GND) Y - W-B Center airbag sensor communication ground line Always Below 1 Ω
    L27-5 (BGND) - L27-3 (GND) P - W-B Passenger side buckle switch ground line Always Below 1 Ω
    L27-7 (1G) - L27-3 (GND) O - W-B Power source (IGN fuse) Ignition switch ON 11 to 14 V
    L27-8 (FSR+) - L27-4 (FSR-) GR-Y Center airbag sensor communication line Ignition switch ON Pulse generation
    L27-9 (BSW) - L27-5 (BGND) O-P Passenger side buckle switch line Seat belt is fastened 12 to 18 mA
    Seat belt is unfastened 4 to 7 mA
    z8-1 (SGD1)-L27-3 (GND) G - W-B Front occupant classification sensor LH ground line Always Below 1 Ω
    z8-2 (SGD2) - L27-3 (GND) O - W-B Front occupant classification sensor RH ground line Always Below 1 Ω
    z8-3 (SGD3) - L27-3 (GND) W - W-B Rear occupant classification sensor LH ground line Always Below 1 Ω
    z8-4 (SGD4) - L27-3 (GND) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 Ω
    z8-11 (SVC1) - z8-1 (SGD1) R-G Front occupant classification sensor LH power supply line Ignition switch ON, load is applied to front occupant classification sensor LH 4.5 to 5.1 V
    z8-12 (SVC2) - z8-2 (SGD2) W-O Front occupant classification sensor RH power supply line Ignition switch ON, load is applied to front occupant classification sensor RH 4.5 to 5.1 V
    z8-5 (SVC3) - Z8-3 (SGD3) GR-W Rear occupant classification sensor LH power supply line Ignition switch ON, load is applied to rear occupant classification sensor LH 4.5 to 5.1 V
    z8-6 (SVC4) - Z8-4 (SGD4) V - BR Rear occupant classification sensor RH power supply line Ignition switch ON, load is applied to rear occupant classification sensor RH 4.5 to 5.1 V
    z8-7 (SIG1) - z8-1 (SGD1) SB-G Front occupant classification sensor LH signal line Ignition switch ON, load is applied to front occupant classification sensor LH Pulse generation
    z8-8 (SIG2) - z8-2 (SGD2) L-O Front occupant classification sensor RH signal line Ignition switch ON, load is applied to front occupant classification sensor RH Pulse generation
    z8-9 (SIG3) - z8-3 (SGD3) Y-W Rear occupant classification sensor LH signal line Ignition switch ON, load is applied to rear occupant classification sensor LH Pulse generation
    z8-10 (SIG4) - z8-4 (SGD4) R-BR Rear occupant classification sensor RH signal line Ignition switch ON, load is applied to rear occupant classification sensor RH Pulse generation
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