Honda Civic Service Manual page 385

EVAP System
DTC Troubleshooting (cont'dl
2 0 . P l u g t h e f u e l t a n k p o r t ( A ) o f t h e E V A P t w o w a y
v a l v e ,
While monitoring FTP sensor voltage with the
Honda PGM Tester, or measuring the voltage
b e t w e e n E C M c o n n e c t o r t e r m i n a l s E 4 a n d E 1 4 ,
slowly pump the vacuum pump until the voitage
droDS to about 1.5 volts.
ECM CONNECTOR E {31PI
Wire side of female terminals
Does the voltage dtop to 1.5 V and hold fot at
Ieast 20 seconds?
YES-The EVAP bypass solenoid valve/EVAP two
way valve is OK. Go to step 22.
N O R e p a i r t h e l e a k f r o m t h e E V A P b y p a s s
solenoid valve, EVAP two way valve. or
F T P s e n s o r . l
11-178
W i r e s i d e o f f e m a l e t e r m i n a l s
EVAP Canister Vent Shut Valve Test
22. Disconnect the vacuum hose from the EVAP
canister vent filter (A), and connect a vacuum pump
to the hose.
T u r n t h e i g n i t l o n s w i t c h O N ( l l ) .
Apply vacuum to the hose with five strokes of the
p u m p .
Does the valve hold vacuum?
YES Go to step 25.
NO The EVAP canister vent shut valve is OK. Go
to step 30.
T u r n t h e i g n i t i o n s w i t c h O F F .
Disconnect the EVAP canister vent shut valve 2P
conneclor.
Check for continuity between EVAP canister vent
s h u t v a l v e 2 P c o n n e c t o r t e r m i n a l N o . 2 a n d b o d y
g r o u n d .
EVAP CANISTEB VENT SHUT
VALVE 2P CONNECTOR
{LT GRN/REOI
\
25.
26.
2 1 .