Inspection Procedure

1. Turn the ignition switch to the on position.
2. Clear the 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 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 (See DTC 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: USE SIMULATION METHOD TO CHECK 

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 (See ON-VEHICLE INSPECTION  ).

   HINT:

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

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

   OK: COMPLETED is displayed. 

1. Using the Techstream, perform the sensitivity check (See INITIALIZATION  ).
   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).