SEAT BELT WARNING SYSTEM TERMINALS OF ECU


  1. CHECK COMBINATION METER ASSEMBLY


    1. Disconnect the I18 combination meter assembly connector.

      A01HST6E01

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I18-7 (ES) - 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 I18 combination meter assembly connector.

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

      Tester Connection Wiring Color Terminal Description Condition Specified Condition
      I18-1 (B) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      I18-13 (IG+) - Body ground L - Body ground

      Ignition power supply

      (IG signal)

      		 Power switch off Below 1 V
      I18-13 (IG+) - Body ground L - Body ground

      Ignition power supply

      (IG signal)

      		 Power switch on (IG) 11 to 14 V

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

  2. CHECK AIRBAG SENSOR ASSEMBLY

    A01HVQ3E49
    Terminal No. Terminal Symbol Destination
    N5-10 LBE+ Front seat inner belt assembly LH
    N5-18 LBE- Front seat inner belt assembly LH
    O7-16 FSR+ Occupant detection ECU
    O7-24 FSR- Occupant detection ECU

  3. CHECK OCCUPANT DETECTION ECU


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

      A01HVC1E05
      Tester Connection Wiring Color Terminal Description Condition Specification
      d11-1 (+B) - d11-3 (GND) W - W-B Auxiliary battery Power switch off 11 to 14 V
      d11-2 (DIA) - d11-3 (GND) GR - W-B Diagnosis (DLC3) Power switch on (IG), Techstream not connected to DLC3 Below 1 V
      d11-3 (GND) - Body ground W-B - Body ground Ground Always Below 1 V
      d11-4 (FSR-) - d11-3 (GND) Y - W-B Airbag sensor assembly communication line Always Below 1 V
      d11-5 (BGND) - d11-3 (GND) P - W-B Front passenger buckle switch ground line Always Below 1 V
      d11-6 (IG) - d11-3 (GND) B - W-B Power source Power switch on (IG) 11 to 14 V
      d11-7 (FSR+) - d11-4 (FSR-) L - Y Airbag sensor assembly communication line Power switch on (IG) Pulse generation
      d11-8 (BSW) - d11-5 (BGND) G - P Front passenger buckle switch line Always Pulse generation
      d8-1 (SVC3) - d8-5 (SGD3) GR - W Occupant classification sensor LH power supply line Power switch on (IG) 4.9 to 5.1 V
      d8-2 (SVC4) - d8-6 (SGD4) V - BR Occupant classification sensor RH power supply line Power switch on (IG) 4.9 to 5.1 V
      d8-3 (SIG3) - d8-5 (SGD3) Y - W Occupant classification sensor LH signal line Power switch on (IG) Pulse generation
      d8-4 (SIG4) - d8-6 (SGD4) B - BR Occupant classification sensor RH signal line Power switch on (IG) Pulse generation

      If the result is not as specified, the occupant detection ECU may have a malfunction.