DTC B1796: Sleep Operation Failure of Occupant Classification ECU (TO 12/2010): Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC
1. Turn the ignition 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 assembly. Refer to DTC CHECK / CLEAR .
4. Turn the ignition switch off, and wait for at least 10 seconds.
5. Turn the ignition switch on (IG).
6. Check the DTCs. Refer to 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
REPLACE OCCUPANT CLASSIFICATION ECU
1. Turn the ignition switch off.
2. Disconnect the negative (-) terminal cable from the battery.
3. Replace the occupant classification ECU. Refer to REMOVAL .
NEXT: Go to next step
PERFORM ZERO POINT CALIBRATION
1. Connect the negative (-) terminal cable to the battery.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Using the Techstream, perform "Zero point calibration". Refer to INITIALIZATION .
  OK
  
  The "Zero Point Calibration is complete." is displayed.
NEXT: Go to next step
PERFORM SENSITIVITY CHECK
1. Using the Techstream, perform "Sensitivity check". Refer to INITIALIZATION .
  Standard value
  
  27 to 33 kg (59.52 to 72.75 lb)
NEXT → END