Honda Civic 2002-2003 Service Manual page 395

EVAPSystem
Fuel Tank Vapor Control Valve Test (cont'd)
7. Connect a second vacuum pump to the fuel tank
vapor signal tube (A).
A973X·041·XXXXX
8. Apply vacuum (1 pump) to the fuel tank vapor
signal tube (A), then check the vacuum on the
pump in step 6.
If the vacuum holds, replace the fuel tank vapor
control valve (see page 11-189).
If the vacuum is released, go to step 9.
11-188
9. Fill the fuel tank with fuel, then check for fuel in the
EVAP two way valve (A), and fuel tank vapor
recirculation hose
(8).
NOTE: At either location, tiny droplets of fuel are
normaL
If fuel runs out of the hoses at either location,
replace the fuel tank vapor control valve.
If the fuel does not run out of the hoses, the fuel
tank vapor system function is normal.
A
Check for fuel running out.
B
Check for fuel running out.
10. Disconnect the fuel tank vapor quick disconnect
from the EVAP canister, then plug the port on the
canister. Reapply vacuum (80 pumps).
If the vacuum holds, replace the fuel tank control
valve (see page 11-189).
If the vacuum does not hold, inspect the EVAP
canister vent shut valve a-ring. If the a-ring is OK,
replace the EVAP canister, and repeat step 4.
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