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DTC B1795: Occupant Classification ECU Malfunction: Procedure

WARNING: This page is about a different car, the 2010 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Turn the power switch ON (IG).
    2. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .
    3. Clear the DTCs stored in the center airbag sensor. Refer to DATA LIST / ACTIVE TEST .
    4. Turn the power switch OFF.
    5. Turn the power switch ON (IG), and wait for at least 10 seconds.
    6. Check for the DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1795 is not output.

      HINT: 

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

    OK → See step   4 

    NG: Go to next step 

  2. REPLACE OCCUPANT CLASSIFICATION ECU 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch ON (IG).
    3. Using the Techstream, save the ECU data from the ECU which has been installed on the vehicle. Refer to REGISTRATION .
    4. Turn the power switch OFF.
    5. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
    6. Replace the occupant classification ECU. Refer to DISASSEMBLY .
    7. Connect the negative (-) terminal cable to the battery.
    8. Turn the power switch ON (IG).
    9. Using the Techstream, load the previous ECU data stored into the new ECU. Refer to REGISTRATION .
    10. Turn the power switch OFF.
    11. Turn the power switch ON (IG).
    12. Clear the DTCs stored in the memory. Refer to DTC CHECK / CLEAR .

      HINT: 

      If DTC is not cleared at this time, past DTC will remain.

    NEXT: Go to next step 

  3. PERFORM SENSITIVITY CHECK 
    1. Perform the sensitivity check. Refer to INITIALIZATION .

    NEXT → END 

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