Honda Civic Service Manual page 567

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7.
Connect a second vacuum pump to the OBVR signal
nose.
VACUUM PUMP/
GAUGE.0 - 30 in.Hg
A973X - 041 -
xxxxx
Apply vacuum (1 pump) to the ORVR signal hose,
then check the vacuum on the pump in step 6.
. lf the vacuum holds, replace the ORVR vent shut
valve.
. lf the vacuum is released, the ORVR vent shut
valve is OK.
Disconnect the ORVR quick disconnect from the EVAP
canister, then plug the port on the canister.
Reapply vacuum (80 pumps).
. lf the vacuum holds, reDlace the ORVR vent shut
valve,
.
lf the vacuum does not hold, inspect the EVAP can-
ister vent shut valve O-ring. lf the O-ring is OK,
replace the EVAP canister and repeat step 4.
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11-297
ORVR Vent Shut Valve Replacement
1.
Remove the fuel tank (see page 1 1-242).
2.
Remove the ORVR vent shut valve from the fuel tank.
3.
lnstall oarts in the reverse order of removal.