Honda Accord 2008 Manual page 1131

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DTC P0721: Problem in Output Shaft
(Countershaft) Speed Sensor Circuit
DTC P0722: Problem in Output Shaft
(Countershaft) Speed Sensor Circuit (No
Signal Input)
N O T E :
• B e f o r e y o u t r o u b l e s h o o t r e c o r d a l l f r e e z e d a t a a n d
a n y o n - b o a r d s n a p s h o t w i t h t h e H D S , a n d r e v i e w
G e n e r a l T r o u b l e s h o o t i n g I n f o r m a t i o n ( s e e p a g e 1 4 - 4 ) .
• T h i s c o d e is c a u s e d b y a n e l e c t r i c a l c i r c u i t p r o b l e m
a n d c a n n o t b e c a u s e d b y a m e c h a n i c a l p r o b l e m i n t h e
t r a n s m i s s i o n .
1. C h e c k f o r p r o p e r o u t p u t s h a f t ( c o u n t e r s h a f t ) s p e e d
s e n s o r i n s t a l l a t i o n ( s e e p a g e 1 4 - 2 2 8 ) . If t h e s e n s o r
is i n s t a l l e d i m p r o p e r l y , c o r r e c t t h e p r o b l e m , t h e n
g o t o s t e p 2 7 .
2. T u r n t h e i g n i t i o n s w i t c h t o O N (II).
3. C l e a r t h e D T C w i t h t h e H D S .
4. B l o c k t h e r e a r w h e e l s a n d r a i s e t h e f r o n t o f t h e
v e h i c l e , m a k e s u r e it is s e c u r e l y s u p p o r t e d , a n d
a l l o w t h e f r o n t w h e e l s t o r o t a t e f r e e l y , o r r a i s e t h e
v e h i c l e o n a lift.
5. S t a r t t h e e n g i n e , a n d t u r n t h e V S A o f f ( t h e l i g h t o n
t h e V S A O F F s w i t c h c o m e s o n ) . R u n t h e v e h i c l e i n
e i t h e r 2 n d , 3 r d , 4 t h , o r 5 t h g e a r ( n o t 1st) i n D w i t h
t h e e n g i n e s p e e d a t 2 , 0 0 0 r p m o r h i g h e r , f o r a t l e a s t
10 s e c o n d s . S l o w d o w n a n d s t o p t h e w h e e l s .
6. M o n i t o r t h e O B D s t a t u s f o r P 0 7 2 1 o r P 0 7 2 2 i n t h e
D T C s M E N U w i t h t h e H D S .
Does
the HDS indicate
FAILED?
Y E S — G o t o s t e p 7.
N O — I f t h e H D S i n d i c a t e s P A S S E D , i n t e r m i t t e n t
f a i l u r e , t h e s y s t e m is O K a t t h i s t i m e . C h e c k f o r
l o o s e o r p o o r c o n n e c t i o n s b e t w e e n t h e P C M a n d
o u t p u t s h a f t ( c o u n t e r s h a f t ) s p e e d s e n s o r
c o n n e c t o r s . If t h e H D S i n d i c a t e s N O T C O M P L E T E D ,
g o t o s t e p 5.
7. T u r n t h e i g n i t i o n s w i t c h t o L O C K ( 0 ) .
8. J u m p t h e S C S l i n e w i t h t h e H D S .
9. D i s c o n n e c t P C M c o n n e c t o r s B ( 4 9 P ) a n d C ( 4 9 P ) .
10. C h e c k f o r c o n t i n u i t y b e t w e e n P C M c o n n e c t o r
t e r m i n a l s B 4 1 a n d b o d y g r o u n d , a n d b e t w e e n C 4 1
a n d b o d y g r o u n d .
B ( 4 9 P )
P C M C O N N E C T O R S
C ( 4 9 P )
.. . 1 7
71
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11 12 13 1415 16 1718
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AA
L G 2 ( B R N / Y E L )
L G 1 ( B R N / Y E L )
T e r m i n a l s i d e o f f e m a l e t e r m i n a l s
Is there
continuity?
Y E S — G o t o s t e p 1 1 .
N O — R e p a i r o p e n i n t h e w i r e s b e t w e e n P C M
c o n n e c t o r t e r m i n a l s B 4 1 , C 4 1 a n d b o d y g r o u n d
( G 1 0 1 ) , o r r e p a i r p o o r b o d y g r o u n d ( G 1 0 1 ) , t h e n g o
t o s t e p 2 6 .
( c o n t ' d )
14-109

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