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Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Z4 And Z1 Connector Terminal
    GTY278153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specification
    Z4-1 (+B) - Z4-3 (GND) R - W-B Battery Always 11 to 14 V
    Z4-2 (DIA) - Z4-3 (GND) V - W-B Diagnosis (DLC3) Engine switch on (IG) Pulse generation
    Z4-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    Z4-4 (FSR-) - Z4-3 (GND) B - W-B Center airbag sensor assembly communication line (-) Always Below 1 V
    Z4-5 (BGND) - Z4-3 (GND) GR - W-B Passenger side buckle switch ground line Always Below 1 V
    Z4-7 (IG) - Z4-3 (GND) BR - W-B Power source (ECU-B fuse) Engine switch on (IG) 11 to 14 V
    Z4-8 (FSR+) - Z4-4 (FSR-) W - B Center airbag sensor assembly communication line Engine switch on (IG) Pulse generation
    Z4-9 (BSW) - Z4-5 (BGND) L - GR Passenger side buckle switch line Always Pulse generation
    Z1-1 (SGD1) - Z4-3 (GND) G - W-B Front occupant classification sensor LH ground line Always Below 1 V
    Z1-2 (SGD2) - Z4-3 (GND) LG - W-B Front occupant classification sensor RH ground line Always Below 1 V
    Z1-3 (SGD3) - Z4-3 (GND) P - W-B Rear occupant classification sensor LH ground line Always Below 1 V
    Z1-4 (SGD4) - Z4-3 (GND) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 V
    Z1-5 (SVC3) - Z1-3 (SGD3) GR - P Rear occupant classification sensor LH power supply line Engine switch on (IG), a load applied to rear occupant classification sensor LH 4.9 to 5.1 V
    Z1-6 (SVC4) - Z1-4 (SGD4) V - BR Rear occupant classification sensor RH power supply line Engine switch on (IG), a load applied to rear occupant classification sensor RH 4.9 to 5.1 V
    Z1-7 (SIG1) - Z1-1 (SGD1) SB - G Front occupant classification sensor LH signal line Engine switch on (IG), a load applied to front occupant classification sensor LH 0 to 5.1 V
    Z1-8 (SIG2) - Z1-2 (SGD2) L - LG Front occupant classification sensor RH signal line Engine switch on (IG), a load applied to front occupant classification sensor RH 0 to 5.1 V
    Z1-9 (SIG3) - Z1-3 (SGD3) Y - P Rear occupant classification sensor LH signal line Engine switch on (IG), a load applied to rear occupant classification sensor LH 0 to 5.1 V
    Z1-10 (SIG4) - Z1-4 (SGD4) B - BR Rear occupant classification sensor RH signal line Engine switch on (IG), a load applied to rear occupant classification sensor RH 0 to 5.1 V
    Z1-11 (SVC1) - Z1-1 (SGD1) R - G Front occupant classification sensor LH power supply line Engine switch on (IG), a load applied to front occupant classification sensor LH 4.9 to 5.1 V
    Z1-12 (SVC2) - Z1-2 (SGD2) W - LG Front occupant classification sensor RH power supply line Engine switch on (IG), a load applied to front occupant classification sensor RH 4.9 to 5.1 V
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