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Home >> Scion >> 2009 >> xD Standard >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System >> Occupant Classification System >> DTC B1795 Occupant Classification ECU Malfunction >> Inspection Procedure

Inspection Procedure

  1. CHECK FOR DTC 
    1. Turn the ignition switch ON, and wait for at least 60 seconds.
    2. Clear any DTCs stored in the memory (See DTC CHECK / CLEAR  ).

      HINT:

      • First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor.
      • Use a Techstream to clear the DTCs of the occupant classification ECU, otherwise the DTCs cannot be cleared.
    3. Turn the ignition switch off, and wait for at least 10 seconds.
    4. Turn the ignition switch ON, and wait for at least 60 seconds.
    5. Using the Techstream, check for DTCs of the occupant classification ECU (See DTC CHECK / CLEAR  ).

      OK: 

      DTC B1795 is not output. 

      HINT:

      DTCs other than DTC B1795 may be output at this time, but they are not related to this check.

    NG: Go to step 2 

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

  2. REPLACE OCCUPANT CLASSIFICATION ECU 
    1. Turn the ignition switch off.
    2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    3. Replace the occupant classification ECU (See REMOVAL  ).

      HINT:

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

  3. PERFORM ZERO POINT CALIBRATION 
    1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
    2. Connect a Techstream to the DLC3.
    3. Turn the ignition switch ON, and wait for at least 60 seconds.
    4. Using the Techstream, perform the zero point calibration (See INITIALIZATION  ).
  4. PERFORM SENSITIVITY CHECK 
    1. Using a Techstream, perform the sensitivity check (See INITIALIZATION  ).

      Standard range: 

      27 to 33 kg (59.5 to 72.8 lb) 

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