2010 Toyota Yaris Owners Manual - Page 203

2-5. Driving information Trailer towing (Canada) Your vehicle is designed primarily as a passenger-carrying vehicle, thus towing a trailer will have an adverse effect on handling, performance, braking, durability, and fuel consumption. For your safety and the safety of others, do not overload the vehicle or trailer. Toyota warranties do not apply to damage or malfunction caused by towing a trailer for commercial purposes.