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

      Auxiliary battery power supply

      Power switch off

      11 to 14 V

      G16-39 (IG+) - Body ground

      B - Body ground

      IG power supply

      Power switch on (IG)

      11 to 14 V

      G16-21 (ET) - Body ground

      BR - Body ground

      Ground

      Always

      Below 1 Ω

  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 (+B) - d16-3 (GND)

    W - W-B

    Auxiliary battery

    Power switch off

    11 to 14 V

    d16-2 (DIA) - d16-3 (GND)

    GR - W-B

    Diagnosis (DLC3)

    Power switch on (IG), GTS not connected to DLC3

    -

    d16-3 (GND) - Body ground

    W-B - Body ground

    Ground

    Always

    Below 1 V

    d16-4 (FSR-) - d16-3 (GND)

    LG - W-B

    Airbag sensor assembly communication line

    Always

    Below 1 V

    d16-5 (BGND) - d16-3 (GND)

    P - W-B

    Front passenger side buckle switch ground line

    Always

    Below 1 V

    d16-6 (IG2) - d16-3 (GND)

    B - W-B

    IG power source

    Power switch off

    Below 1 V

    Power switch on (IG)

    11 to 14 V

    d16-7 (FSR+) - d16-4 (GND)

    L - LG

    Airbag sensor assembly communication line

    Power switch on (IG)

    Pulse generation

    d16-8 (BSW) - d16-5 (BGND)

    G - P

    Front passenger side buckle switch line

    Always

    Pulse generation

    d15-1 (SVC1) - d15-5 (SGD1)

    R - W

    Front occupant classification sensor LH power supply line

    Power switch on (IG)

    4.9 to 5.1 V

    d15-2 (SVC3) - d15-6 (SGD3)

    GR- W

    Rear occupant classification sensor LH power supply line

    Power switch on (IG)

    4.9 to 5.1 V

    d15-3 (SIG1) - d15-5 (SGD1)

    P - W

    Front occupant classification sensor LH signal line

    Power switch on (IG)

    Pulse generation

    d15-4 (SIG3) - d15-6 (SGD3)

    SB - W

    Rear occupant classification sensor LH signal line

    Power switch on (IG)

    Pulse generation

    d15-5 (SGD1) - d16-3 (GND)

    G - W-B

    Front occupant classification sensor LH ground line

    Always

    Below 1 Ω

    d15-6 (SGD3) - d16-3 (GND)

    W - W-B

    Rear occupant classification sensor LH ground line

    Always

    Below 1 Ω