Honda Civic Service Manual page 1719

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Actuator Test
' t .
Disconnect the actuator cable from the actuator rod
and the 4P connector.
Connect battery power to the No 4 terminal and
g r o u n d t o t h e N o . 1 , N o . 2 a n d N o . 3 t e r m i n a l s .
Connect a vacuum pump to the vacuum hose Then
apply vacuum to the actuator.
2 .
VACUUM PUMP
GAUGE,0 - 30 in.Hg.
{A973X - 041 -
xxxxxl
ACTUATOR
,lP CONNEcToR
Terminalside o{
male termrnals
4. The actuator rod should pull in completely. lf the rod
pulls in only pan-way or not at all' check for a leak-
ing vacuum line or defective solenoid.
ACTUATOF ROD
l - t
23-247
5. With voltage and vacuum still applied, try to pull the
actuator rod out by hand. You should not be able to
oull it out. ll you can, it is defective
1 .
Disconnect ground from the No.3 terminal. The actu-
ator rod should return lf it does not return, but the
vent hose and filter are not plugged, the solenoid
valve assembly is defective.
Repeat steps 2 through 5, and disconnect ground
f r o m t h e N o . 1 t e r m i n a l . T h e a c t u a t o r r o d s h o u l d
return. lI it does not return, but the vent hose and
filter are not plugged. the solenoid valve assembly
is defective.
It you replace the solenoid valve assembly, be sure
to use new O-rings on each solenoid.
Disconnect power and ground from the 4P connector.
Disconnect the vent hose from the actuator. Connect
a vacuum pump to the actuator vent hose port, and
apply vacuum. The actuator rod should pull in com-
p l e t e l y . l f n o t , t h e v a c u u m v a l v e i s s t u c k o p e n .
Replace the actuator'
8 .