Honda Accord 2008 Manual page 1092

Automatic Transmission
System Description (cont'd)
Hydraulic Flow (cont'd)
D P o s i t i o n : S h i f t i n g b e t w e e n 2 n d g e a r a n d 3 r d g e a r
A s t h e s p e e d o f t h e v e h i c l e r e a c h e s t h e p r o g r a m m e d v a l u e , t h e P C M t u r n s s h i f t s o l e n o i d v a l v e C O N , a n d s h i f t
s o l e n o i d v a l v e C c o v e r s t h e s h i f t s o l e n o i d v a l v e C p r e s s u r e p o r t ( S O t o s h i f t v a l v e C. S h i f t s o l e n o i d v a l v e s A a n d B
r e m a i n O N . S h i f t v a l v e C i s m o v e d t o t h e l e f t s i d e t o s w i t c h t h e l i n e p r e s s u r e p o r t (4) a n d CPC A p r e s s u r e ( 4 A ) l e a d i n g
t o t h e 2 n d c l u t c h . S h i f t v a l v e C a l s o u n c o v e r s t h e CPC B p r e s s u r e p o r t (4B) l e a d i n g t o t h e 3 r d c l u t c h . T h e P C M a c t u a t e s
A / T c l u t c h p r e s s u r e c o n t r o l s o l e n o i d v a l v e s A a n d B. A / T c l u t c h p r e s s u r e c o n t r o l s o l e n o i d v a l v e A p r e s s u r e (56) i s
a p p l i e d t o C P C v a l v e A , a n d A / T c l u t c h p r e s s u r e c o n t r o l s o l e n o i d v a l v e B p r e s s u r e (57) is a p p l i e d t o CPC v a l v e B. C P C
v a l v e B r e g u l a t e s l i n e p r e s s u r e ( 4 " ) , a n d l i n e p r e s s u r e ( 4 " ) b e c o m e s CPC B p r e s s u r e ( 4 B ) . CPC B p r e s s u r e f l o w s t o s h i f t
v a l v e A v i a s h i f t v a l v e s C a n d B, a n d b e c o m e s 3 r d c l u t c h p r e s s u r e (30) a t s h i f t v a l v e A . T h e 2 n d c l u t c h p r e s s u r e ( 2 0 ) is
c h a n g e d t o CPC p r e s s u r e m o d e , a n d t h e 3 r d c l u t c h is e n g a g e d b y t h e CPC p r e s s u r e . T h e 1st c l u t c h is a l s o e n g a g e d , b u t
n o p o w e r is t r a n s m i t t e d b e c a u s e o f t h e o n e - w a y c l u t c h .
1ST C L U T C H /
1 S T 1ST-HOLD C L U T C H
2
M D
A C C U M U L A T O R
* i.
. .
A
c c i
N O T E : W h e n u s e d , " l e f t " o r " r i g h t " i n d i c a t e s d i r e c t i o n o n t h e h y d r a u l i c c i r c u i t .
I JK W BH in I 1 5
1 S T - H O L I
3
, , .
N
2 N D C L U T C H
2ND
3RD CLUTCH
^ R
T r u
|gguMULATORfE S ^ ,SS ' ON
C L U T C "
™UTD
SM
'
SS,ON
=^2V
3RD
TRANS- 1
" - r ^
PRESSURE
d | j j | l | | t ^
?lfflrsn
ACCUMULATOR
4
T H
ggg 0 N
™ „
u
3 1 1 1 1 1 1 1 ( ^ 1
S W I T C H
rllllllllllLll 1
„ - r . r r T l
A C C U M U L A T O R
5TH 4TH
4 T H C L U T C H
CLUTCH CLUTCH
T R A N S - . V / . „ • • , , . . , - >
S H I F T S O L E N O I D
V A L V E D: O F F ( C L O S E D )
. 5TH
I A C C U M U L A T O R
A / T C L U T C H
P R E S S U R E C O N T R O L
S O L E N O I D V A L V E S
A T F C O O L E R FILTER
14-70