Honda Accord 2008 Manual page 1099

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1 P o s i t i o n
L i n e p r e s s u r e (1) r e g u l a t e d b y t h e r e g u l a t o r v a l v e f l o w s t o s h i f t s o l e n o i d v a l v e s . T h e P C M s w i t c h e s t h e s h i f t s o l e n o i d
v a l v e s O N a n d O F F . T h e c o n d i t i o n s o f t h e s h i f t s o l e n o i d v a l v e s a n d t h e p o s i t i o n s o f t h e s h i f t v a l v e s a r e a s f o l l o w s :
• S h i f t s o l e n o i d v a l v e A is O F F , a n d c l o s e s t h e s h i f t s o l e n o i d v a l v e A p r e s s u r e p o r t ( S A ) ; s h i f t v a l v e A r e m a i n s o n t h e
l e f t s i d e .
• S h i f t s o l e n o i d v a l v e B is t u r n e d O N , a n d c l o s e s t h e s h i f t s o l e n o i d v a l v e B p r e s s u r e p o r t ( S B ) ; s h i f t v a l v e B a n d s h i f t
v a l v e E r e m a i n o n t h e l e f t s i d e .
• S h i f t s o l e n o i d v a l v e C is t u r n e d O N , a n d c l o s e 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 C ) ; s h i f t v a l v e C a n d s h i f t
v a l v e D r e m a i n o n t h e l e f t s i d e .
• S h i f t s o l e n o i d v a l v e D is O F F , a n d c l o s e s t h e s h i f t s o l e n o i d v a l v e D p r e s s u r e p o r t ( S D ) .
L i n e p r e s s u r e (4) b e c o m e s 1st c l u t c h p r e s s u r e (10) a t s h i f t v a l v e D, a n d f l o w s t o t h e 1st c l u t c h . T h e 1st c l u t c h i s
e n g a g e d . 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 C, 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 C p r e s s u r e (58) is a p p l i e d t o C P C v a l v e C v i a t h e l o c k - u p s h i f t v a l v e . CPC v a l v e C 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 C p r e s s u r e ( 4 C ) . C P C C p r e s s u r e (4C) 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 D, E, a n d C,
a n d b e c o m e s 1 s t - h o l d c l u t c h p r e s s u r e (15) a t s h i f t v a l v e B. 1 s t - h o l d c l u t c h p r e s s u r e (15) is a p p l i e d t o t h e 1 s t - h o l d
c l u t c h , a n d t h e 1 s t - h o l d c l u t c h is e n g a g e d .
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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14-77

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