I think the recommendation is to put the ignition in “Lock” then disconnect the negative battery and wait 90 seconds before working on the airbag system. The airbag will not deploy unless power is applied to it. As such do not apply any power, take ohm resistance readings or anything else to the wiring going to the airbag.
If you put back the seat, make sure the above procedure with the battery and ignition is repeated if for some reason you have reconnected the battery.
Suggest you go to the on-line Camry manual section at the link below. Find the info on the SRS system with side airbags and see what you can learn. Both car models should have simular systems.
http://oregonstate.edu/~tongt/camry