My dealer called me yesterday saying they submitted the information to Toyota Canada but they've been told that Toyota is ''working'' on it and are waiting on their answer on how to fix this.Ok!
We have our vehicle back in our hands.
It has been repaired with this relay fix, and apparently this is the root cause. The dealership did some testing with the old and new relay and found repeatability on the fix. They are on the same page as Toyota Canada that the root cause is addressed.
The relay in question is at the right, rear part of the vehicle along with the 12 volt car battery. I guess the build up of humidity between the rear right wheel well on the inside of the vehicle causes some Frost which builds up around the battery and the relay. I guess the relay contacts are not sealed so the frost that builds up there prevents proper contact.
I don't have part numbers because I did not want to hold the dealership hostage to get the information, but essentially the previous relay was not sealed, where is the new one is.
As for what exactly this relay does, it sounds like it is a main relay that is between the 12 volt battery output and the control system for main power. So without this relay passing 12 volts along to the ECU, the vehicle will never show as ready to drive. good news is my coworker has had this fix for about 3 weeks, through cold weather with no issues noted.
The real question we should all be talking about is whether the component placement on the vehicle and/or the humidity buildup is appropriate for vehicle design. I don't have the answer to these questions as I don't design cars, but I question how appropriate the design is...
Hope it does not take too long before they tell them to change the relay cause mines has been doing it frequently the pass 2 days.