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Terminals Of Ecu

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
  1. OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Terminals Of Occupant Classification ECU
    G04114476Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    OCCUPANT CLASSIFICATION ECU CONNECTOR TERMINALS REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    +B (O3-1) - GND (O3-3) R - W-B Power source (ECU-B Fuse) Always 10 to 14 V
    DIA (O3-2) - GND (O3-3) V - W-B Diagnosis (DLC3) IG switch ON Pulse generation
    GND (O3-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
    FSR- (O3-4) - GND (O3-3) B - W-B Center airbag sensor assembly communication line (-) Always Below 1 Ω
    BGND (O3-5) - GND (O3-3) GR - W-B Passenger side buckle switch ground line Always Below 1 Ω
    IG (O3-7) - GND (O3-3) BR - W-B Power source (IG2 Fuse) IG switch ON 10 to 14 V
    FSR+ (O3-8) - FSR- (O3-4) W - B Center airbag sensor assembly communication line IG switch ON Pulse generation
    BSW (O3-9) - BGND (O3-5) L - GR Passenger side buckle switch line Buckle switch ON
    Buckle switch OFF    		 Pulse generation
    SGD1 (O4-1) -GND (O3-3) G - W-B Occupant classification sensor front LH ground line Always Below 1 Ω
    SGD2 (O4-2) - GND (O3-3) O - W-B Occupant classification sensor front RH ground line Always Below 1 Ω
    SGD3 (O4-3) - GND (O3-3) W - W-B Occupant classification sensor rear LH ground line Always Below 1 Ω
    SGD4 (O4-4) - GND (O3-3) BR - W-B Occupant classification sensor rear RH ground line Always Below 1 Ω
    SVC3 (O4-5) - SGD3 (O4-3) GR - W Occupant classification sensor rear LH power supply line IG switch ON, a load is applied to occupant classification sensor rear LH 4.5 to 5.1 V
    SVC4 (O4-6) - SGD4 (O4-4) V - BR Occupant classification sensor rear RH power supply line IG switch ON, a load is applied to occupant classification sensor rear RH 4.5 to 5.1 V
    SIG1 (O4-7) - SGD1 (O4-1) SB - G Occupant classification sensor front LH signal line IG switch ON, a load is applied to occupant classification sensor front LH 0.2 to 4.7 V
    SIG2 (O4-8) - SGD2 (O4-2) L - O Occupant classification sensor front RH signal line IG switch ON, a load is applied to occupant classification sensor front RH 0.2 to 4.7 V
    SIG3 (O4-9) - SGD3 (O4-3) Y - W Occupant classification sensor rear LH signal line IG switch ON, a load is applied to occupant classification sensor rear LH 0.2 to 4.7 V
    SIG4 (O4-10) - SGD4 (O4-4) B - BR Occupant classification sensor rear RH signal line IG switch ON, a load is applied to occupant classification sensor rear RH 0.2 to 4.7 V
    SVC1 (O4-11) - SGD1 (O4-1) R - G Occupant classification sensor front LH power supply line IG switch ON, a load is applied to occupant classification sensor front LH 4.5 to 5.1 V
    SVC2 (O4-12) - SGD2 (O4-2) W - O Occupant classification sensor front RH power supply line IG switch ON, a load is applied to occupant classification sensor front RH 4.5 to 5.1 V
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