Air Bag Warning Light Flashing

[01GS300]

I have a 2001 GS300 and about three weeks ago my Airbag Warning Light started blinking for no reason and after no maintenance was performed. I read some of the forums and tried the "jiggle the wires" solution with no luck. Yesterday while doing an oil change at Toyota I had the codes read and was surprised to see "several" codes were in. They were: B0112, B0117, B1162 and B1167. All these codes were essentially for circuit grounds. Is it possible that I have this many grounds at once or could it be some kind of ECM fault.

I might add that I live in Ontario, Canada and these codes did come in while we were having a real cold snap. We've since had some mild above freezing weather but that didn't seem to help, but I could still have some moisture problems. Any insight you could give or experiences to share on similar problems like this would be greatly appreciated.