SEAT BELT WARNING SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A0119Q1E15

    1. Disconnect the D1 combination meter assembly connector.

    2. Measure the voltage and resistance of the wire harness side connector.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D1-1 (IG+) - Body ground SB - Body ground Ignition switch signal Ignition switch off → ON Below 1 V → 11 to 14 V
      D1-2 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      D1-24 (ET) - Body ground BR - Body ground Ground Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the combination meter assembly connector.

    4. Measure the voltage of the wire harness side connector.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      D1-5 (RRSB) - Body ground LG - Body ground Rear seat inner belt assembly signal (RH side) Rear RH seat belt is unfastened Below 1 V
      Rear RH seat belt is fastened 11 to 14 V
      D1-6 (RLSB) - Body ground R - Body ground Rear seat inner belt assembly signal (LH side) Rear LH seat belt is unfastened Below 1 V
      Rear LH seat belt is fastened 11 to 14 V
      D1-7 (RRBT) - Body ground B - Body ground Rear RH seat belt warning light signal Rear RH seat belt warning light ON → OFF Below 1 V → 11 to 14 V
      D1-9 (RLBT) - Body ground SB - Body ground Rear LH seat belt warning light signal Rear LH seat belt warning light ON → OFF Below 1 V → 11 to 14 V
      D1-10 (P/SB) - Body ground V - Body ground Front seat inner belt assembly signal (passenger side) Front passenger seat is occupied and its seat belt is unfastened Below 1 V
      Front passenger seat is occupied and its seat belt is fastened 11 to 14 V
      D1-20 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      D1-21 (CANH) - Body ground G - Body ground CAN communication line Ignition switch ON Pulse generation
      D2-16 (PBLT) - Body ground Y - Body ground Passenger seat belt warning light signal

      Ignition switch ON

      Front passenger seat belt warning light blinks → off

      		 Below 1 V ←→ 11 to 14 V → 11 to 14 V

      If the result is not as specified, the combination meter assembly may have a malfunction.

  2. CENTER AIRBAG SENSOR ASSEMBLY

    A0119KRE10
    Terminal No. Terminal Symbol Destination
    G15-14 PBE- Front seat inner belt assembly (passenger side)
    G15-15 PBE+ Front seat inner belt assembly (passenger side)

  3. MAIN BODY ECU

    A01179UE01
    Text in Illustration
    *1 Instrument Panel Junction Block
    A011B53E01
    Text in Illustration
    *1 Main body ECU (w/ Theft Deterrent System)
    A0119MJE02
    Text in Illustration
    *1 Main body ECU (w/o Theft Deterrent System)

    1. Remove the main body ECU.

    2. Measure the voltage and resistance of the wire harness side connectors.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3F-11 (GND1) - Body ground - Ground Always Below 1 Ω
      3F-29 (ACC)*1 - Body ground - Ignition power supply (ACC signal) Ignition switch ACC → off 11 to 14 V → Below 1 V
      3F-30 (BECU) - Body ground - +B (power system signal system) power supply Always 11 to 14 V
      3F-32 (IG)*1 - Body ground - Ignition power supply (IG signal) Ignition switch ON → off 11 to 14 V → Below 1 V

      • *1: w/o Smart Entry and Start System

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the main body ECU connectors.

    4. Measure the voltage of the wire harness side connectors.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      3E-20 (DBKL) - Body ground SB - Body ground Front seat inner belt assembly signal (driver side)

      Ignition switch ON

      Tongue plate fastened

      		 Below 1 V

      Ignition switch ON

      Tongue plate unfastened

      		 11 to 14 V
      D42-13 (CANL) - Body ground W - Body ground CAN communication line Ignition switch ON Pulse generation
      D42-14 (CANH) - Body ground R - Body ground CAN communication line Ignition switch ON Pulse generation
      3D-55 - Body ground V - Body ground Power supply for front passenger seat belt warning light Ignition switch ON 11 to 14 V

      If the result is not as specified, there may be a malfunction in the wire harness.