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DTC B1795: Occupant Classification ECU Malfunction: Procedure

  1. CHECK FOR DTC 
    1. Turn the ignition switch to ON.
    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 DTC CHECK / CLEAR .
    4. Turn the ignition switch to OFF.
    5. Turn the ignition switch to ON, 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 DTC B1795 may be output at this time, but they are not related to this check.

    NG → See step   2 

    OK → See step   8 

  2. PERFORM REGISTRATION BEFORE ECU EXCHANGE 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Using the Techstream, save the ECU data from the ECU which was installed on the vehicle. Refer to REGISTRATION .

    NEXT: Go to next step 

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

    NEXT: Go to next step 

  4. PERFORM REGISTRATION AFTER ECU EXCHANGE 
    1. Turn the ignition switch to ON.
    2. Using the Techstream, load the previous ECU data stored in the tester into the new ECU. Refer to REGISTRATION .

    NEXT: Go to next step 

  5. PERFORM ZERO POINT CALIBRATION 
    1. Using the Techstream, perform zero point calibration. Refer to INITIALIZATION .

    NEXT: Go to next step 

  6. CHECK FOR DTC 

    HINT: 

    Check that the zero point calibration is completed normally. If one of the following conditions is met, DTC B1797 will be output (refer to INITIALIZATION. Refer to INITIALIZATION ):

    • Zero point calibration is performed when the conditions for the calibration are not satisfied.
    • Zero point calibration has failed.
    1. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .
    2. Clear the DTCs stored in the center airbag sensor. Refer to DTC CHECK / CLEAR .
    3. Turn the ignition switch to OFF.
    4. Turn the ignition switch to ON.
    5. Check for the DTCs. Refer to DTC CHECK / CLEAR .

      OK

      DTC B1797 is not output.

    NG → See step   9 

    OK: Go to next step 

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

    NEXT → END 

  8. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  9. GO TO DTC B1797. Refer to  DTC B1797: Calibration Malfunction  
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