Honda Civic Service Manual page 395

EVAP System
FuelTank Vapor ControlValve Test (cont'd)
7. Connect a second vacuum pump to the fuel tank
v a p o r s i g n a l t u b e ( A ) .
8. Apply vacuum (1 pump) to the fuel tank vapor
signal tube (A). then check the vacuum on the
pump in step 6.
. lf the vacuum holds, replace the fueltank vapor
c o n t r o l v a l v e { s e e p a g e 1 1 - 1 8 9 ) .
. If the vacuum is released, goto step 9.
1 1 - 1 8 8
1 0 .
Fill the fuel tank with fuel, then check for fuel in the
EVAP two way valve (A), and fuel tank vapor
recirculation hose (B).
NOTE: At either location, tiny droplets of fuel are
n o r m a l .
. lf fuel runs out of th e hoses at either location,
replace the fuel tank vapor control valve.
. l f t h e f u e l d o e s n o t r u n o u t o f t h e h o s e s , t h e f u e l
tank vapor system function is normal.
Disconnect the fuel tank vapor quick disconnect
from the EVAP canister, then plug lhe port on the
canister. Reapply vacuum (80 pumps).
. lf the vacuum holds, replace the fuel tank control
v a l v e ( s e e p a g e 1 1 - 1 8 9 ) .
. lf the vacuum does not hold, insDect the EVAP
canister vent shut valve o-ring. lf the o-ring is OK,
replace the EVAP canister, and repeat step 4.
Check for fuel rirnning out.
Check for fuel running out.