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Inspection Procedure

WARNING: This page is about a different car, the 2008 Scion xB. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC (OCCUPANT CLASSIFICATION ECU) 
    1. Turn the ignition switch to ON, and wait for at least 10 seconds.
    2. Check for the DTCs of the occupant classification ECU (see DTC CHECK / CLEAR  ).

      OK: 

      DTC is not output. 

    NG : REPAIR CIRCUITS INDICATED BY OUTPUT DTCS  (See DIAGNOSTIC TROUBLE CODE CHART  )

    OK: Go to next step 

  2. CHECK FOR DTC (CENTER AIRBAG SENSOR) 
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Clear the DTCs (see DTC CHECK / CLEAR  ).
    3. Turn the ignition switch to OFF.
    4. Turn the ignition switch to ON, and wait for at least 60 seconds.
    5. Check for DTCs (see DTC CHECK / CLEAR  ).

      OK: 

      DTC B1650/32 is not output. 

      HINT:

      Codes other than DTC B1650/32 may be output at this time, but they are not related to this check.

      Fig 1: Checking DTC (Center Airbag Sensor)
      G04951023Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: Go to step 3 

    OK : USE SIMULATION METHOD TO CHECK  (See DIAGNOSIS SYSTEM  )

  3. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch to OFF.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Check that the connectors are properly connected to the center airbag sensor and the occupant classification ECU.

      OK: 

      The connectors are properly connected. 

    NG : CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  4. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor and the occupant classification ECU.
    2. Check that the connectors (on the center airbag sensor side and occupant classification ECU side) are not damaged.

      OK: 

      The connectors are not deformed or damaged. 

    NG : REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  5. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT 
    Fig 2: Checking Occupant Classification System Circuit
    G05390268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Using a service wire, connect terminals 12 (FSR+) and 13 (FSR-) of connector B.
      NOTE: Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      M2-11 (FSR+) - M2-12 (FSR-) Always Below 1 Ω
    3. Disconnect the service wire from connector B.
    4. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      M2-11 (FSR+) - M2-12 (FSR-) Always 1 MΩ or higher
      M2-11 (FSR+) - Body ground Always 1 MΩ or higher
      M2-12 (FSR-) - Body ground Always 1 MΩ or higher
    5. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    6. Turn the ignition switch to ON.
    7. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      M2-11 (FSR+) - Body ground Ignition switch ON Below 1 V
      M2-12 (FSR-) - Body ground Ignition switch ON Below 1 V

    NG: Go to step 6 

    OK : REPLACE CENTER AIRBAG SENSOR ASSEMBLY  (See REMOVAL  )

  6. CHECK NO. 2 FLOOR WIRE 
    Fig 3: Checking No. 2 Floor Wire
    G05390269Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch to OFF.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Disconnect the front seat wire RH connector from the No. 2 floor wire.
    4. Using a service wire, connect terminals 12 (FSR+) and 13 (FSR-) of connector B.
    5. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      IM1-5 (FSR+) - IM1-10 (FSR-) Always Below 1 Ω
    6. Disconnect the service wire from connector B.
    7. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED RESISTANCE CONDITION CHART

      Tester Connection Condition Specified Condition
      IM1-5 (FSR+) - IM1-10 (FSR-) Always 1 MΩ or higher
      IM1-5 (FSR+) - Body ground Always 1 MΩ or higher
      IM1-10 (FSR-) - Body ground Always 1 MΩ or higher
    8. Turn the ignition switch to OFF.
    9. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    10. Disconnect the front seat wire RH connector from the No. 2 floor wire.
    11. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    12. Turn the ignition switch to ON.
    13. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      TESTER CONNECTION SPECIFIED VOLTAGE CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      IM1-5 (FSR+) - Body ground Ignition switch ON Below 1 V
      IM1-10 (FSR-) - Body ground Ignition switch ON Below 1 V

    NG : REPLACE NO. 2 FLOOR WIRE 

    OK : REPLACE FRONT SEAT WIRE RH 

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