Honda CR-V 1997 Service Manual page 404

Emission Control System
Positive Crankcase Ventilation (PCV) System (cont'd)
2. At idle, make sure there is a clicking sound from the
PCV valve when the hose between the PCV valve
and intake manifold is lightly pinched with your fin-
gers or pliers.
'97 - 98 models:
Gently pinch here.
'99 - 00 models:
Gently pinch here.
If there is no clicking sound, check the PCV valve
grommet for cracks or damage. If the grommet is
OK, replace the PCV valve and recheck.
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