DTC B1796: Sleep Operation Failure of Occupant Classification ECU: Procedure

1. Turn the ignition switch to the on position.
2. Clear the DTCs stored in the memory. Refer toDTC CHECK / CLEAR .

   HINT: 

   First clear DTCs stored in the occupant classification ECU and then in the center airbag sensor assembly.

3. Turn the ignition switch to the lock position, and wait for at least 2 seconds.
4. Turn the ignition switch to the on position.
5. Check the DTCs. Refer toDTC CHECK / CLEAR .

   OK

   DTC B1796 is not output.

   HINT: 

   Codes other than DTC B1796 may be output at this time, but they are not related to this check.

OK → See step   5 

NG: Go to next step 

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. Refer toREMOVAL .

   HINT: 

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

NEXT: Go to next step 

1. Connect the negative (-) terminal cable to the battery.
2. Connect a Techstream to the DLC3.
3. Turn the ignition switch to the on position.
4. Using the Techstream, perform the zero point calibration. Refer toINITIALIZATION .

   OK

   COMPLETED is displayed.

NEXT: Go to next step 

1. Using a Techstream, perform the sensitivity check. Refer toINITIALIZATION .
   1. Confirm that nothing is placed on the passenger seat.
   2. Confirm that the beginning 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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