Honda Civic Service Manual page 564

Emission Control System
Evaporative Emission (EVAPI Controls (cont'd)
Evaporative Emission (EVAPI Two Way Valve Testing
l'96 DIGYS engine lcoupel,'97 Dl6Y7 engine (coupe: KL
model, sedan: KL (LX) modoll,'97 Dl6Y8 engine {coup€:
alt models, sedan: KL model,
'98-all modelsll:
1. Remove the fuel fill cap.
2 .
R e m o v e t h e v a p o r l i n e f r o m t h e E V A P t w o w a y
valve. and connect it to a T-fitting from a vacuum
gauge and a vacuum pump as shown.
VACUUM/PRESSURE
I J
f96 D16Y5 engine,'96 D16Y7 engine,'96 D16Y8 ongine
(sedanl,'97 D16Y5 engine,'97 Dl6Y7 engine {coupe: KA,
KC models, sedan: KA, KC, KL {DX} models, hatchback:
all modsls),'97 D16Y8 engine {sedan: KA, KC models}l:
1. Remove the fuel fill cap,
2 .
R e m o v e t h e v a p o r l i n e f r o m t h e E V A P t w o w a y
valve on the fuel tank, and connect it to a T-fitting
f r o m a v a c u u m g a u g e a n d a v a c u u m p u m p a s
snown.
VACUUM/
PRESSURE GAUGE,
0 - 4 in.Hg
07JAZ - 0010008
VACUUM
PUMP/GAUGE.
0 -30 in.Hg
A 9 7 3 X - 0 4 1 - X X X X X
Apply vacuum slowly and continuously while watch-
ing the gauge. The vacuum should stabilize momen-
tarily at 0.8 - 2.1 kPa (6 - 16 mmHg, 0.2 - 0.6 in.Hg).
l f t h e v a c u u m s t a b i l i z e s ( v a l v e o p e n s ) b e l o w
0 . 8 k P a { 6 m m H g , 0 . 2 i n . H g ) o r a b o v e 2 . 1 k P a
(16 mmHg, 0.6 in.Hg), install a new valve and retest.
Move the vacuum pump hose from the vacuum fit-
ting to the pressure fitting, and move the vacuum
gauge hose from the vacuum side to the pressure
side as shown.
Slowlv pressurize the vapor line while watching the
gauge. The pressure should be stabilize momentari
l y a b o v e 1 . 0 k P a ( 8 m m H g . 0 . 3 i n . H g ) .
.
l f t h e p r e s s u r e m o m e n t a r i l y s t a b i l i z e s ( v a l v e
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
valve is OK.
.
lf the pressure stabilizes below 1.0 kPa (8 mmHg,
0.3 in.Hg), install a new valve and retest.
A p p l y v a c u u m s l o w l y a n d c o n t i n u o u s l y w h i l e
watching the gauge. The vacuum should stabilize
momentarily at 0.7 - 2.0 kPa (5 - 15 mmHg, 0.2 - 0.6
i n . H g ) .
l f t h e v a c u u m s t a b i l i z e s ( v a l v e o p e n s ) b e l o w
0 . 7 k P a ( 5 m m H g , 0 . 2 i n . H g ) o r a b o v e 2 . 0 k P a
(15 mmHg, 0.6 in.Hg), install a new valve and retest.
Move the vacuum pump hose from the vacuum fit-
'l'
4.
5.
ting to the pressure fitting, and move the
gauge hose from the vacuum side to the
side as shown.
PRESSURE
SIDE
Slowly pressurize the vapor line while watching the
gauge. The pressure should stabilize at 1.3 - 4.7 kPa
( 0 - 3 5 m m H g , 0 . 4 - 1 . 4 i n . H g ) .
.
I t t h e p r e s s u r e m o m e n t a r i l y s t a b i l i z e s ( v a l v e
o p e n s ) a t 1 . 3 - 4 . 7 k P a ( 1 0 - 3 5 m m H g , 0 . 4 - 1 . 4
in. Hg), the valve is OK.
. lf the pressure stabilizes below 1.3 kPa (10 mmHg,
0.4 in.Hg) or above 4.7 kPa (35 mmHg. 1.4 in.Hg),
install a new valve and retest.
vacuum
pressure
GAUGE
0 - 4 i n . H g
T-FITTING
T-FITTING
11-294
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