Lexus 2003 SC430 Owner's Manual page 261

IN CASE OF AN EMERGENCY
40sa28a
" 1 Joint
2 When removing the jack, turn the joint by hand in the
"contract" direction until the jack is free.
3 When storing, turn the joint by hand in the "expand"
direction until the jack is firmly secured to prevent it
from flying forward during a collision or sudden
braking.
244
40sa38b
To remove the spare tire:
1 Remove the tire cover.
2 Loosen the bolt and remove it.
When storing the spare tire, place it with the outer side of the
wheel facing the inside of the vehicle. Then bolt the tire in place
to prevent the tire from flying forward during a collision or
sudden braking.