2011 Toyota Tundra Regular Cab Owners Manual - Page 186

1-7. Safety information Installing child restraints using a seat belt (child restraint lock function belt) n Rear-facing ⎯ Infant seat/convertible seat Place the child seat on the rear seat facing the rear of the vehicle. 1 Before driving Run the seat belt through the child seat and insert the plate into the buckle. Make sure that the belt is not twisted. Fully extend the shoulder belt and then allow it to retract slightly in order to activate the ALR lock mode. Lock mode allows the seat belt to retract only. 157