Toyota 2005 Sienna Owner's Manual page 405

Tire related term
Vehicle normal load on the tire
Weather side
Table 1—Occupant loading and distribution for vehicle normal load for various designated seating capacities
Designated seating capacity,
number of occupants
2 through 4
5 through 10
05 SIENNA_U (L/O 0409)
the load on an individual tire that is determined by distributing to each axle
its share of the curb weight, accessory weight, and normal occupant weight
(distributed in accordance with Table 1 that follows) and dividing by two
the surface area of the rim not covered by the inflated tire
Vehicle normal load, number of
occupants
2
3
Meaning
Occupant distribution in a normally
loaded vehicle
2 in front
2 in front, 1 in second seat
2005 SIENNA from Sep. '04 Prod. (OM45431U)
397