Honda Accord 2008 Manual page 1094

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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 3 r d g e a r a n d 4 t h 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 F F , a n d s h i f t
s o l e n o i d v a l v e C u n 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 A r e m a i n s
O N , a n d s h i f t s o l e n o i d v a l v e B r e m a i n s O F F . S h i f t v a l v e C is m o v e d t o t h e r i g h 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 C P C 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 . 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 C P C A p r e s s u r e p o r t ( 4 A )
l e a d i n g t o t h e 4 t h 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 ( 5 6 ) is 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 ( 5 7 ) is a p p l i e d t o C P C v a l v e B. C P C v a l v e A 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 C P C A
p r e s s u r e ( 4 A ) . C P C A p r e s s u r e ( 4 A ) f l o w s t o s h i f t v a l v e B v i a s h i f t v a l v e s C a n d A , a n d b e c o m e s 4 t h c l u t c h p r e s s u r e ( 4 0 )
a t s h i f t v a l v e B. 3 r d c l u t c h p r e s s u r e ( 3 0 ) i s c h a n g e d t o C P C p r e s s u r e , a n d t h e 4 t h c l u t c h i s e n g a g e d b y t h e C P C p r e s s u r e .
T h e 1 s t c l u t c h i s a l s o e n g a g e d , b u t n o p o w e r i s 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 .
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 .
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