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Terminals Of Ecu

WARNING: This page is about a different car, the 2010 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK OCCUPANT CLASSIFICATION ECU 
    Fig 1: Identifying Occupant Classification ECU
    GTY229113Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    a9-1 (+B) - a9-3 (GND) W - W-B Battery power supply Always 11 to 14 V
    a9-2 (DIA) - a9-3 (GND) GR - W-B Diagnosis (DLC3) Ignition switch ON Pulse generation
    a9-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
    a9-4 (FSR-) - a9-3 (GND) LG - W-B Center airbag sensor assembly communication line Always Below 1 V
    a9-5 (BGND) - a9-3 (GND) P - W-B Front passenger side buckle switch ground line Always Below 1 V
    a9-7 (IG2) - a9-3 (GND) B - W-B Ignition switch power supply Ignition switch ON 11 to 14 V
    a9-8 (FSR+) - a9-4 (FSR-) L - LG Center airbag sensor assembly communication line Ignition switch ON Pulse generation
    a9-9 (BSW) - a9-5 (BGND) G - P Front passenger side buckle switch line Always Pulse generation
    a10-1 (SGD1) - a9-3 (GND) G - W-B Front occupant classification sensor LH ground line Always Below 1 V
    a10-2 (SGD2) - a9-3 (GND) LG - W-B Front occupant classification sensor RH ground line Always Below 1 V
    a10-3 (SGD3) - a9-3 (GND) W - W-B Rear occupant classification sensor LH ground line Always Below 1 V
    a10-4 (SGD4) - a9-3 (GND) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 V
    a10-11 (SVC1) - a10-1 (SGD1) R - G Front occupant classification sensor LH power supply line Ignition switch ON, load applied to front occupant classification sensor LH 4.9 to 5.1 V
    a10-12 (SVC2) - a10-2 (SGD2) W - LG Front occupant classification sensor RH power supply line Ignition switch ON, load applied to front occupant classification sensor RH 4.9 to 5.1 V
    a10-5 (SVC3) - a10-3 (SGD3) GR - W Rear occupant classification sensor LH signal line Ignition switch ON, load applied to rear occupant classification sensor LH 4.9 to 5.1 V
    a10-6 (SVC4) - a10-4 (SGD4) V - BR Rear occupant classification sensor RH signal line Ignition switch ON, load applied to rear occupant classification sensor RH 4.9 to 5.1 V
    a10-7 (SIG1) - a10-1 (SGD1) P - G Front occupant classification sensor LH signal line Ignition switch ON, load applied to front occupant classification sensor LH 0 to 5.1 V
    a10-8 (SIG2) - a10-2 (SGD2) L - LG Front occupant classification sensor RH signal line Ignition switch ON, load applied to front occupant classification sensor RH 0 to 5.1 V
    a10-9 (SIG3) - a10-3 (SGD3) SB - W Rear occupant classification sensor LH power supply line Ignition switch ON, load applied to rear occupant classification sensor LH 0 to 5.1 V
    a10-10 (SIG4) - a10-4 (SGD4) B - BR Rear occupant classification sensor RH power supply line Ignition switch ON, load applied to rear occupant classification sensor RH 0 to 5.1 V
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