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

  1. CHECK COMBINATION METER ASSEMBLY

    E161130N05

    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

    C147673N23

    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

    C238368E08
    Tip:

    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.