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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OCCUPANT CLASSIFICATION ECU 
    1. Measure the voltage of the connector.
    Fig 1: Identifying Occupant Classification ECU Terminals
    G05184539Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION AND SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B(L1-1)-GND(L1-3) R-W-B +B power source Always 10 to 14 V
    DIA(L1-2)-GND(L1-3) W-W-B Diagnosis (DLC3) Ignition switch ON Pulse generation
    GND (L1-3) - Body ground W-B - Body ground Ground Always Below 1 V
    FSR-(L1-4)-GND(L1-3) O-W-B Center airbag sensor communication line Always Below 1 V
    BGND(L1-5) - GND(L1-3) BR-W-B Passenger side buckle switch ground line Always Below 1 V
    IG(L1-7)-GND(L1-3) B-W-B IG power source Ignition switch ON 10 to 14 V
    FSR+(L1-8)-FSR-(L1-4) V-O Center airbag sensor communication line Ignition switch ON Pulse generation
    BSW(L1-9)-BGND(L1-5) GR-BR Passenger side buckle switch line Buckle switch
    ON Buckle switch OFF    		 Pulse generation
    SGD1(a1-1)-GND(L1-3) G-W-B Front occupant classification sensor LH ground line Always Below 1 V
    SGD2(a1-2)-GND(L1-3) O-W-B Front occupant classification sensor RH ground line Always Below 1 V
    SGD3(a1-3)-GND(L1-3) W-W-B Rear occupant classification sensor LH ground line Always Below 1 V
    SGD4(a1-4)-GND(L1-3) BR-W-B Rear occupant classification sensor RH ground line Always Below 1 V
    SVC1(a1-11)-SGD1(a1-1) R-G Front occupant classification sensor LH power supply line Ignition switch ON, a load is applied to front occupant classification sensor LH 4.5 to 5.1 V
    SVC2(a1-12)-SGD2(a1-2) W-O Front occupant classification sensor RH power supply line Ignition switch ON, a load is applied to front occupant classification sensor RH 4.5 to 5.1V
    SVC3(a1-5)-SGD3(a1-3) GR-W Rear occupant classification sensor LH power supply line Ignition switch ON, a load is applied to rear occupant classification sensor LH 4.5 to 5.1V
    SVC4(a1-6)-SGD4(a1-4) V-BR Rear occupant classification sensor RH power supply line Ignition switch ON, a load is applied to rear occupant classification sensor RH 4.5 to 5.1 V
    SIG1(a1-7)-SGD1(a1-1) SB-G Front occupant classification sensor LH signal line Ignition switch ON, a load is applied to front occupant classification sensor LH 0.2 to 4.7 V
    SIG2(a1-8)-SGD2(a1-2) L-O Front occupant classification sensor RH signal line Ignition switch ON, a load is applied to front occupant classification sensor RH 0.2 to 4.7 V
    SIG3(a1-9)-SGD3(a1-3) Y-W Rear occupant classification sensor LH signal line Ignition switch ON, a load is applied to rear occupant classification sensor LH 0.2 to 4.7 V
    SIG4(a1-10)-SGD4(a1-4) R-BR Rear occupant classification sensor RH signal line Ignition switch ON, a load is applied to rear occupant classification sensor RH 0.2 to 4.7 V
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