LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 218 (Seat Belt) >> Seat Belt Warning System >> Terminals Of Ecu

Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.
  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Terminals Of ECU - Hatchback
    G04830528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 2: Identifying Terminals Of ECU - Sedan
    G04830529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the D1 combination meter assembly connector.
    2. Measure the voltage and resistance of the wire harness side connector.

      Standard 

      VOLTAGE CONDITION TERMINAL CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      D1-1 - Body ground B - Body ground Ignition switch signal Ignition switch OFF → ON Below 1 V → 11 to 14 V
      D1-2-Body ground L - Body ground Battery Always 11 to 14 V
      D1-24-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.

      Standard voltage 

      VOLTAGE CONDITION TERMINAL CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      D1-20-Body ground G - Body ground CAN communication line Ignition switch ON Pulse generation (See WAVEFORM 1 )
      D1-21-Body ground W-Body ground CAN communication line Ignition switch ON Pulse generation (See WAVEFORM 2 )
      D2-9(1) - Body ground O - Body ground Seat belt warning light signal (Front passenger side) Ignition switch ON Front passenger seat is occupied and its seat belt is unfastened Alternating between 11 to 14 V and below 1 V
      D2-9(1) - Body ground O - Body ground Seat belt warning light signal (Front passenger side) Ignition switch ON Front passenger seat is occupied and its seat belt is fastened Below 1 V
      D76-9(2) - Body ground O - Body ground Seat belt warning light signal (Front passenger side) Ignition switch ON Front passenger seat is occupied and its seat belt is unfastened Alternating between 11 to 14 V and below 1 V
      D76-9(2) - Body ground O - Body ground Seat belt warning light signal (Front passenger side) Ignition switch ON Front passenger seat is occupied and its seat belt is fastened Below 1 V
      (1) Hatchback
      (2) Sedan

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

    5. Waveform 1 (Reference): Using an oscilloscope

      CAN communication signal 

      WAVEFORM REFERENCE CHART

      Terminal Name D1-21(CANL)-D1-24(ET)
      Tester Range 1 V/DIV, 10μs/DIV
      Condition Ignition switch ON
      Fig 3: Waveform Signal 1
      G04830530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Waveform 2 (Reference): Using an oscilloscope

      CAN communication signal 

      WAVEFORM REFERENCE CHART

      Terminal Name D1-21(CANL)-D1-24(ET)
      Tester Range 1 V/DIV, 10μs/DIV
      Condition Ignition switch ON
      Fig 4: Waveform Signal 2
      G04830531Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CENTER AIRBAG SENSOR ASSEMBLY 
    Fig 5: Identifying Center Airbag Sensor Assembly Connector Terminal
    G04830532Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE CONDITION TERMINAL CHART

    Terminal No. Terminal Symbol Destination
    D16-13 CANH CAN communication line
    D16-21 IG2 IGN fuse
    D16-22 CANL CAN communication line
    D16-25 E1 Ground
    D16-26 E2 Ground
    J8-11 DBE+ Front seat inner belt assembly LH
    J8-12 DBE- Front seat inner belt assembly LH
    J9-12 FSP+ Occupant Classification ECU
    J9-13 FSP- Occupant Classification ECU
  3. OCCUPANT CLASSIFICATION ECU 
    Fig 6: Identifying J24 Occupant Classification ECU Connector
    G04830533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the J24 occupant classification ECU connector.
    2. Measure the voltage and resistance of the wire harness side connector.
      VOLTAGE CONDITION TERMINAL CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      J24-7 (IG) - J24-3 (GND) O - W-B Power source (IG2 Fuse) Ignition switch OFF Below 1 V
      J24-7 (IG) - J24-3 (GND) O - W-B Power source (IG2 Fuse) Ignition switch ON 11 to 14 V
      J24-1 (+B) - Body ground V-Body ground Power source (ECU-B Fuse) Always 11 to 14 V
      J24-3 (GND) - Body ground W-B - 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 occupant classification ECU connector.
    4. Measure the voltage of the connector.
      VOLTAGE CONDITION TERMINAL CHART

      Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
      BSW (J24-9) - BGND (J24-5) O - P Passenger side buckle switch line Buckle switch ON Buckle switch OFF Pulse generation
      FSR+ (J24-8) - FSR- (J24-4) GR - Y Center airbag sensor assembly communication line Ignition switch ON Pulse generation

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

scientia non olet · About LEMON Manuals