Honda Civic Service Manual page 393

EVAP System
EVAP Two Way Valve Test
Special Tools Required
. V a c u u m p u m p / G a u g e , 0 - 3 0 i n . H g
A973X-041-XXXXX
. Vacuum/Pressure cauge.0-4 in. Hg 07JAZ-0010008
1 . R e m o v e t h e f u e l f i l l c a p .
2. Disconnect the vapor line from the EVAP two way
valve (A). Connect it to a T-fitting (B) from the
v a c u u m g a u g e a n d t h e v a c u u m p u m p a s s h o w n ,
07JAZ-0010008
Apply vacuum slowly and continuously while
watching the gauge. The vacuum should stabilize
m o m e n t a r i l y a t 0 . 8 2 . 1 k P a ( 6 1 6 m m H g ,
0 , 2 0 . 6 i n . H g ) .
lf the vacuum stabilizes {valve opens) below 0.8 kpa
( 6 m m H g , 0 . 2 i n . H g ) o r a b o v e 2 . 1 k P a ( 1 6 m m H g ,
0.6 in.Hg), install a new valve and retest.
1 1 - 1 8 6
4. Move the vacuum pump hose from the vacuum
fitting to the pressure fitting, and move the vacuum
gauge hose from the vacuum side to the pressure
side (A) as shown.
Slowly pressurize the vapor line while watching the
gauge. The pressure should stabilize momentarilV
a b o v e 1 . 0 k P a ( 8 m m H g , 0 . 3 i n . H g ) .
. lfthe pressure momentarily stabilizes (valve
o p e n s ) a b o v e 1 . 0 k P a ( 8 m m H g , 0 . 3 i n . H g ) , t h e
v a l v e i s O K .
. lf the pressure stabilizes below 1.0 kPa (8 mmHg,
0.3 in.Hg), install a new valve and retest.