Here is the solution to Toyota “AIRBAG OFF” warning light error.
Connect Techstream cable (vxdiag vcx nano for Toyota) to Toyota OBD port and your PC USB port
Run Techstream software to scan trouble codes
B1795:Occupant Classification ECU malfunction
Use TIS Techstram software to erase the B1795 trouble code
Then turn off the car, and turn on again, then wait for 10 seconds.
Use read trouble code again, if the error code gone, you are done.
If you try to erase the error code, but it didn’t fix the problem
Just buy a used airbag ecu with same exact part number
After installing it, it work fine without having to reprogram it.
Note:If you get a new airbag ECU, you need upload airbag ecu data from old one to new.
To remove the airbag ecu, you need to take out the passenger seat.
Use 14mm socket to remove 4 bolts
Before remove airbag ecu, please disconnect the battery negative terminal
And wait at least 90 seconds before disconnecting the airbag ecu.
Use 8 mm socket to remove airbag ecu bolts
Make sure two airbag ecu part number same
After then install new one/used back on vehicle.
Start vehicle to test,if the trouble codes still exit,just use TIS Techstream to erase trouble code then test again.