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DTC B1795: Occupant Classification ECU Malfunction: Procedure

WARNING: This page is about a different car, the 2010 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Turn the ignition switch to ON, and wait for at least 60 seconds.
    2. Clear the DTCs stored in memory. Refer to DTC CHECK / CLEAR .

      HINT: 

      • First clear the DTCs stored in the occupant classification ECU, and then clear the DTCs stored in the center airbag sensor.
      • Use the 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 to ON, and wait for at least 60 seconds.
    5. Using the Techstream, check for DTCs of the occupant classification ECU. Refer to 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 → See step   2 

    OK → See step   5 

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

      HINT: 

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

    NEXT: Go to next step 

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

      OK

      "Zero Point Calibration is complete." is displayed.

    NEXT: Go to next step 

  4. PERFORM SENSITIVITY CHECK 
    1. Using the Techstream, perform the sensitivity check. Refer to INITIALIZATION .

      Standard range

      27 to 33 kg (59.5 to 72.8 lb)

    NEXT → END 

  5. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM