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


  1. CHECK COMBINATION METER ASSEMBLY

    A01GAOON05

    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

  2. CHECK AIRBAG SENSOR ASSEMBLY

    A01GAAKN23
    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

    A01G9WHE08

    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) Ignition switch ON, GTS not connected to 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 - W 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 - W 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 W - W-B Rear occupant classification sensor LH ground line Always Below 1 Ω