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Home >> Toyota >> 2008 >> FJ Cruiser RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Supplemental Restraint System) >> Airbag System >> DTC B1650/32 Occupant Classification System Malfunction >> Inspection Procedure

Inspection Procedure

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.
NOTE: In order to prevent unexpected airbag deployment, disconnect the following connectors before inspecting parts such as wire harnesses, if the application of tester probes to the center airbag sensor assembly connector is necessary.
  1. Turn the ignition switch to the lock position.
  2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
  3. Disconnect the connector from the center airbag sensor assembly.
  4. Disconnect the connectors from the steering pad.
  5. Disconnect the connectors from the front passenger airbag assembly.
  6. Disconnect the connector from the front seat outer belt assembly LH.
  7. Disconnect the connector from the front seat outer belt assembly RH.

    HINT:

    Skip the following steps if side and curtain shield airbags are not fitted.

  8. Disconnect the connector from the front seat side airbag assembly LH.
  9. Disconnect the connector from the front seat side airbag assembly RH.
  10. Disconnect the connector from the curtain shield airbag assembly LH.
  11. Disconnect the connector from the curtain shield airbag assembly RH.
  1. CHECK DTC (CENTER AIRBAG SENSOR ASSEMBLY) 
    1. Turn the ignition switch to the on position and wait for at least 60 seconds.
    2. Clear the DTCs stored in the memory (See DTC CHECK / CLEAR  ).
    3. Turn the ignition switch to the lock position.
    4. Turn the ignition switch to the on position and wait for at least 60 seconds.
    5. Check for DTCs (See DTC CHECK / CLEAR  ).

      OK: DTC B1650/32 is not output. 

      HINT:

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

      6. Fig 1: Checking DTC (Center Airbag Sensor Assembly)
      G04830046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK: USE SIMULATION METHOD TO CHECK 

    NG: GO TO NEXT STEP 

  2. CHECK DTC (OCCUPANT CLASSIFICATION ECU) 
    1. Turn the ignition switch to the on position and wait for at least 10 seconds.
    2. Using the Techstream, check for DTCs of the occupant classification ECU (See DATA LIST / ACTIVE TEST  ).

      OK: DTC is not output. 

    NG: GO TO DTC CHART 

    OK: GO TO NEXT STEP 

  3. CHECK CONNECTION OF CONNECTORS 
    1. Turn the ignition switch to the lock position.
    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 assembly and the occupant classification ECU.

      OK: The connectors are properly connected. 

    NG: CONNECT CONNECTORS 

    OK: GO TO NEXT STEP 

  4. CHECK FLOOR WIRE (FOR OPEN) 
    1. Disconnect the connectors from the center airbag sensor assembly and the occupant classification ECU.
    2. Using a service wire, connect J24-8 (FSR+) and J24-4 (FSR-) of connector C.
      NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J9-12 (FSP+)-J9-13 (FSP-) Always Below 1 Ω
      4. Fig 2: Checking Floor Wire (For Open)
      G04830047Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE FLOOR WIRE 

    OK: GO TO NEXT STEP 

  5. CHECK FLOOR WIRE (FOR SHORT) 
    1. Disconnect the service wire from connector C.
    2. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J9-12 (FSP+) - J9-13 (FSP-) Always 1 MΩ or Higher
      3. Fig 3: Checking Floor Wire (For Short)
      G04830048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE FLOOR WIRE 

    OK: GO TO NEXT STEP 

  6. CHECK FLOOR WIRE (TO B+) 
    1. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    2. Turn the ignition switch to the on position.
    3. Measure the voltage.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J9-12 (FSP+)-Body ground Ignition switch on Below 1 V
      J9-13 (FSP-)-Body ground Ignition switch on Below 1 V
      4. Fig 4: Checking Floor Wire (For Short)
      G04830048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE FLOOR WIRE 

    OK: GO TO NEXT STEP 

  7. CHECK FLOOR WIRE (TO GROUND) 
    1. Turn the ignition switch to the lock position.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Measure the resistance.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      Tester Connection Condition Specified Condition
      J9-12{FSP+)-Body ground Always 1 MΩ or Higher
      J9-13(FSP-)-Body ground Always 1 MΩ or Higher
      4. Fig 5: Checking Floor Wire (For Short)
      G04830048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE FLOOR WIRE 

    OK: GO TO NEXT STEP 

  8. CHECK CENTER AIRBAG SENSOR ASSEMBLY 
    1. Turn the ignition switch to the lock position.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Replace the center airbag sensor assembly, for Hatchback: (See CENTER AIRBAG SENSOR ASSEMBLY (FOR HATCHBACK)  ) for Sedan: (See CENTER AIRBAG SENSOR ASSEMBLY (FOR SEDAN)  )

      HINT:

      Perform the inspection using parts from a normal vehicle when possible.

    4. Connect the connectors to the center airbag sensor assembly.
    5. Connect the negative (-) terminal cable to the battery and wait for at least 2 seconds.
    6. Turn the ignition switch to the on position and wait for at least 60 seconds.
    7. Clear the DTCs stored in the memory (See DTC CHECK / CLEAR  ).
    8. Turn the ignition switch to the lock position.
    9. Turn the ignition switch to the on position and wait for at least 60 seconds.
    10. Check for DTCs (See DTC CHECK / CLEAR  ).
      Fig 6: Checking DTC (Center Airbag Sensor Assembly)
      G04830046Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: DTC B1650/32 is not output. 

      HINT:

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

    OK: USE SIMULATION METHOD TO CHECK 

    NG: GO TO NEXT STEP 

  9. REPLACE OCCUPANT CLASSIFICATION ECU 
    1. Turn the ignition switch to the lock position.
    2. Disconnect the negative (-) terminal cable from the battery and wait for at least 90 seconds.
    3. Replace the occupant classification ECU (See ON-VEHICLE INSPECTION  ).
  10. PERFORM ZERO POINT CALIBRATION 
    1. Connect the negative (-) terminal cable to the battery.
    2. Connect the Techstream to the DLC3.
    3. Turn the ignition switch to the on position.
    4. Using the Techstream, perform the zero point calibration (See INITIALIZATION  ).

      OK: COMPLETED is displayed on the tester. 

  11. PERFORM SENSITIVITY CHECK 
    1. Using the Techstream, perform the sensitivity check (See INITIALIZATION  ).
      1. Confirm that nothing is placed on the passenger seat.
      2. Confirm that the first sensor reading is within the standard range.

        Standard range: 

        -3.2 to 3.2 kg (-7 to 7 lb) 

      3. Place a 30 kg (66.14 lb) weight (e.g. a lead mass) onto the front passenger seat.
      4. Confirm that the sensitivity is within the standard range.

        Standard range: 

        27 to 33 kg (59.52 to 72.75 lb) 

        HINT:

        When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).

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