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Terminals Of Ecu

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  1. CHECK OCCUPANT CLASSIFICATION ECU 
    1. Measure the voltage of the connector.
      Fig 1: Identifying Occupant Classification ECU Connectors Terminals
      G05189595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TERMINALS REFERENCE

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      +B(O4-1) - GND(O4-3) L - W-B +B power source Always 10 to 14 V
      DIA (O4-2) - GND (O4-3) W - W-B Diagnosis (DLC3) Power switch ON (IG) Pulse generation
      GND (O4-3) - Body ground W-B - Body ground Ground Always Below 1 V
      FSR- (O4-4) - GND (O4-3) Y-B - W-B Center airbag sensor communication line Always Below 1 V
      BGND (O4-5) - GND (O4-3) R - W-B Passenger side buckle switch ground line Always Below 1 V
      IG (O4-7) - GND (O4-3) B - W-B IG power source Power switch ON (IG) 10 to 14 V
      FSR+ (O4-8) - FSR- (O4-4) Y - Y-B Center airbag sensor communication line Power switch ON (IG) Pulse generation
      BSW (O4-9) - BGND (O4-5) G - R Passenger side buckle switch line Buckle switch ON
      Buckle switch OFF      		 Pulse generation.
      SGD1 (O5-1) - GND (O4-3) G - W-B Front occupant classification sensor LH ground line Always Below 1 V
      SGD2 (O5-2) - GND (O4-3) O - W-B Front occupant classification sensor RH ground line Always Below 1 V
      SGD3 (O5-3) - GND (O4-3) W - W-B Rear occupant classification sensor LH ground line Always Below 1 V
      SGD4 (O5-4) - GND (O4-3) BR - W-B Rear occupant classification sensor RH ground line Always Below 1 V
      SVC1 (O5-11) - SGD1 (O5-1) R - G Front occupant classification sensor LH power supply line Power switch ON (IG), a load is applied to front occupant classification sensor LH 4.5 to 5.1 V
      SVC2 (O5-12) - SGD2 (O5-2) W - O Front occupant classification sensor RH power supply line Power switch ON (IG), a load is applied to front occupant classification sensor RH 4.5 to 5.1 V
      SVC3 (O5-5) - SGD3 (O5-3) GR - W Rear occupant classification sensor LH power supply line Power switch ON (IG), a load is applied to rear occupant classification sensor LH 4.5 to 5.1 V
      SVC4 (O5-6) - SGD4 (O5-4) V - BR Rear occupant classification sensor RH power supply line Power switch ON (IG), a load is applied to rear occupant classification sensor RH 4.5 to 5.1 V
      SIG1 (O5-7) - SGD1 (O5-D SB - G Front occupant classification sensor LH signal line Power switch ON (IG), a load is applied to front occupant classification sensor LH 0.2 to 4.7 V
      SIG2 (O5-8) - SGD2 (O5-2) L - O Front occupant classification sensor RH signal line Power switch ON (IG), a load is applied to front occupant classification sensor RH 0.2 to 4.7 V
      SIG3 (O5-9) - SGD3 (O5-3) Y - W Rear occupant classification sensor LH signal line Power switch ON (IG), a load is applied to rear occupant classification sensor LH 0.2 to 4.7 V
      SIG4 (O5-10) - SGD4 (O5-4) R - BR Rear occupant classification sensor RH signal line Power switch ON (IG), a load is applied to rear occupant classification sensor RH 0.2 to 4.7 V
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