Toyota Prius Owner's Manual page 550

5-2. Steps to take in an emergency
STEP 4
STEP 5
STEP 6
550
PRIUS_OM_OM47A19E_(EE)
Connect the hose to the valve.
Screw the end of the hose clock-
wise as far as possible.
Make sure that the compressor
switch is off.
Remove the rubber stopper from
the compressor.