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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 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 Connector Terminals
      G05585714Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TERMINALS REFERENCE

      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 5.1 V
      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 5.1 V
      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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