“Effects covers automobiles”
No, it does not - not when you are driving down the road. However, you might be correct if your car is parked in your garage.
https://en.wikipedia.org/wiki/Motor_vehicle_exception
And even your own link requires probable cause for a search. Using a drug sniffing dog is a search, plain and simple. The dog should not be used unless there has been probable cause from other means, such as observing the driving smoking pot.