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Terminals Of Ecu

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  1. OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Occupant Classification ECU Connector Terminals
    G05113168Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    OCCUPANT CLASSIFICATION ECU CONNECTOR TERMINALS REFERENCE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specification
    +B (Q4-1) - GND (Q4-3) W-R - W-B Power source (ECU-B Fuse) Always 11 to 14V
    DIA (Q4-2) - GND (Q4-3) R-Y - W-B Diagnosis (DLC3) Ignition switch on Pulse generation
    GND (Q4-3) - Body ground W-B - Body ground Ground Always Below 1 Ω
    FSR- (Q4-4) - GND (Q4-3) B - W-B Center airbag sensor assembly communication line (-) Always Below 1 Ω
    BGND (Q4-5) - GND (Q4-3) GR - W-B Passenger side buckle switch ground line Always Below 1 Ω
    IG (Q4-7) - GND (Q4-3) B-O - W-B Power source (IG2 Fuse) Ignition switch on 11 to 14 V
    FSR+ (Q4-8) - FSR- (Q4-4) W - B Center airbag sensor assembly communication line Ignition switch on Pulse generation
    BSW (Q4-9) - BGND (Q4-5) L - GR Passenger side buckle switch line Buckle switch ON
    Buckle switch OFF    		 Pulse generation
    SGD1 (Q5-1) - GND (Q4-3) G - W-B Occupant classification sensor front LH ground line Always Below 1 Ω
    SGD2 (Q5-2) - GND (Q4-3) O - W-B Occupant classification sensor front RH ground line Always Below 1 Ω
    SGD3 (Q5-3) - GND (Q4-3) W - W-B Occupant classification sensor rear LH ground line Always Below 1 Ω
    SGD4 (Q5-4) - GND (Q4-3) BR - W-B Occupant classification sensor rear RH ground line Always Below 1 Ω
    SVC1 (Q5-11) - SGD1 (Q5-1) R - G Occupant classification sensor front LH power supply line Ignition switch on, a load is applied to occupant classification sensor front LH 4.5 to 5.1 V
    SVC2 (Q5-12) - SGD2 (Q5-2) W - O Occupant classification sensor front RH power supply line Ignition switch on, a load is applied to occupant classification sensor front RH 4.5 to 5.1 V
    SVC3 (Q5-5) - SGD3 (Q5-3) GR - W Occupant classification sensor rear LH power supply line Ignition switch on, a load is applied to occupant classification sensor rear LH 4.5 to 5.1 V
    SVC4 (Q5-6) - SGD4 (Q5-4) V - BR Occupant classification sensor rear RH power supply line Ignition switch on, a load is applied to occupant classification sensor rear RH 4.5 to 5.1 V
    SIG1 (Q5-7) - SGD1 (Q5-1) BR - G Occupant classification sensor front LH signal line Ignition switch on, a load is applied to occupant classification sensor front LH 0.2 to 4.7 V
    SIG2 (Q5-8) - SGD2 (Q5-2) L - O Occupant classification sensor front RH signal line Ignition switch on, a load is applied to occupant classification sensor front RH 0.2 to 4.7 V
    SIG3 (Q5-9) - SGD3 (Q5-3) Y - W Occupant classification sensor rear LH signal line Ignition switch on, a load is applied to occupant classification sensor rear LH 0.2 to 4.7 V
    SIG4 (Q5-10) - SGD4 (Q5-4) B - BR Occupant classification sensor rear RH signal line Ignition switch on, a load is applied to occupant classification sensor rear RH 0.2 to 4.7 V
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