Lexus RX300 2001 Owner's Manual page 144

16R313
2. Fully extend the shoulder belt to put it in the lock mode.
When the belt is then retracted slightly, it cannot be extended.
To hold the convertible seat securely, make sure the belt is in
the lock mode before letting the belt retract.
3. While pressing the convertible seat firmly against the seat
cushion and seatback, let the shoulder belt retract as far as it
will go to hold the convertible seat securely.
2001 MY RX300_U (OM48431U)
COMFORT ADJUSTMENT
16R314
125