SEAT BELT WARNING SYSTEM(w/ Occupant Classification System) TERMINALS OF ECU


  1. CHECK COMBINATION METER ASSEMBLY

    A01V863N05

    1. Disconnect the G16 combination meter assembly connector.

    2. Measure the resistance and voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G16-40 (B) - Body ground Y - Body ground Battery power supply Always 11 to 14 V
      G16-39 (IG+) - Body ground B - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      G16-21 (ET) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Reconnect the G16 combination meter assembly connector.

    4. Measure the voltage according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G16-14 (RLMT) - Body ground B - Body ground Rear seat belt LH warning light signal Rear seat belt LH fastened Below 1 V
      Rear seat belt LH unfastened 11 to 14 V
      G16-19 (RCMT) - Body ground P - Body ground Rear seat center belt warning light signal Rear seat center belt fastened Below 1 V
      Rear seat center belt unfastened 11 to 14 V
      G16-3 (RRMT) - Body ground L - Body ground Rear seat belt RH warning light signal Rear seat belt RH fastened Below 1 V
      Rear seat belt RH unfastened 11 to 14 V
      G16-24 (RLSB) - Body ground G - Body ground Rear seat belt LH buckle switch signal Rear seat belt LH fastened 11 to 14 V
      Rear seat belt LH unfastened Below 1 V
      G16-25 (RCSB) - Body ground B - Body ground Rear seat center belt buckle switch signal Rear seat center belt fastened 11 to 14 V
      Rear seat center belt unfastened Below 1 V
      G16-26 (RRSB) - Body ground W - Body ground Rear seat belt RH buckle switch signal Rear seat belt RH fastened 11 to 14 V
      Rear seat belt RH unfastened Below 1 V

  2. CHECK AIRBAG SENSOR ASSEMBLY

    A01V7QEN23
    Terminal No. Terminal Symbol Destination
    N21-15 LBE+ Front seat inner belt assembly LH
    N21-23 LBE- Front seat inner belt assembly LH
    M25-9 FSR+ Occupant detection ECU
    M25-17 FSR- Occupant detection ECU

  3. CHECK OCCUPANT DETECTION ECU

    A01V7D9E08

    Tech Tips

    Since the occupant detection ECU uses waterproof connectors, the voltage and waveform cannot be inspected directly. Standard voltage readings and waveforms are indicated for reference only.

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specification
    d16-1 - d16-3 W - W-B Battery Always 11 to 14 V
    d16-2 - d16-3 GR - W-B Diagnosis (DLC3) -* -*
    d16-3 - Body ground W-B - Body ground Ground Always Below 1 V
    d16-4 - d16-3 LG - W-B Airbag sensor assembly communication line Always Below 1 V
    d16-5 - d16-3 P - W-B Front passenger side buckle switch ground line Always Below 1 V
    d16-6 - d16-3 B - W-B IG power source Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V
    d16-7 - d16-4 L - LG Airbag sensor assembly communication line Ignition switch ON Pulse generation
    d16-8 - d16-5 G - P Front passenger side buckle switch line Always Pulse generation
    d15-1 - d15-5 GR - W Front occupant classification sensor LH power supply line Ignition switch ON 4.9 to 5.1 V
    d15-2 - d15-6 V - BR Rear occupant classification sensor LH power supply line Ignition switch ON 4.9 to 5.1 V
    d15-3 - d15-5 SB - W Front occupant classification sensor LH signal line Ignition switch ON Pulse generation
    d15-4 - d15-6 B - BR Rear occupant classification sensor LH signal line Ignition switch ON Pulse generation
    d15-5 - d16-3 W - W-B Front occupant classification sensor LH ground line Always Below 1 Ω
    d15-6 - d16-3 BR - W-B Rear occupant classification sensor LH ground line Always Below 1 Ω

    • *: As this is a line that is connected to other systems, voltage changes according to the systems that are connected.