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Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Occupant Classification ECU Connector Terminal Identification
    GTY210069Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbols) Wiring Color Terminal Description Condition Specification
    O2-1 (SGD1) - O4-3 (GND) G - W-B Front occupant classification sensor LH ground line Always Below 1 V
    O2-2 (SGD2) - O4-3 (GND) LG - W-B Front occupant classification sensor RH ground line Always Below 1 V
    O2-3 (SGD3) - O4-3 (GND) W - W-B Rear occupant classification sensor LH ground line Always Below 1 V
    O2-4 (SGD4) - O4-3 (GND) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 V
    O2-5 (SVC3) - O2-3 (SGD3) GR - W Rear occupant classification sensor LH power supply line Ignition switch on (IG), a load is applied to rear occupant classification sensor LH 4.5 to 5.1 V
    O2-6 (SVC4) - O2-4 (SGD4) V - BR Rear occupant classification sensor RH power supply line Ignition switch on (IG), a load is applied to rear occupant classification sensor RH 4.5 to 5.1 V
    O2-7 (SIG1) - O2-1 (SGD1) P - G Front occupant classification sensor LH signal line Ignition switch on (IG), a load is applied to front occupant classification sensor LH 0.2 to 4.9 V
    O2-8 (SIG2) - O2-2 (SGD2) L - LG Front occupant classification sensor RH signal line Ignition switch on (IG), a load is applied to front occupant classification sensor RH 0.2 to 4.9 V
    O2-9 (SIG3) - O2-3 (SGD3) Y - W Rear occupant classification sensor LH signal line Ignition switch on (IG), a load is applied to rear occupant classification sensor LH 0.2 to 4.9 V
    O2-10 (SIG4) - O2-4 (SGD4) B - BR Rear occupant classification sensor RH signal line Ignition switch on (IG), a load is applied to rear occupant classification sensor RH 0.2 to 4.9 V
    O2-11 (SVC1) - O2-1 (SGD1) R - G Front occupant classification sensor LH power supply line Ignition switch on (IG), a load is applied to front occupant classification sensor LH 4.5 to 5.1 V
    O2-12 (SVC2) - O2-2 (SGD2) W - LG Front occupant classification sensor RH power supply line Ignition switch on (IG), a load is applied to front occupant classification sensor RH 4.5 to 5.1 V
    O4-1 (+B) - O4-3 (GND) R - W-B Battery Always 10 to 14 V
    O4-2 (DIA) - O4-3 (GND) V - W-B Diagnosis (DLC3) Ignition switch on (IG) Pulse generation
    O4-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    O4-4 (FSR-) - O4-3 (GND) B - W-B Center airbag sensor assembly communication line (-) Always Below 1 V
    O4-5 (BGND) - O4-3 (GND) GR - W-B Passenger side buckle switch ground line Always Below 1 V
    O4-7 (IG) - O4-3 (GND) BR - W-B Power source (ECU-B Fuse) Ignition switch on (IG) 10 to 14 V
    O4-8 (FSR+) - O4-4 (FSR-) W - B Center airbag sensor assembly communication line Ignition switch on (IG) Pulse generation
    O4-9 (BSW) - O4-5 (BGND) L - GR Passenger side buckle switch line Always Below 1 V
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