Honda Accord 2008 Manual page 1161

DTC P0812: Open in Transmission Range
Switch ATPR Switch Circuit
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 (see p a g e 14-4).
• 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. 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).
2. S h i f t t o R, a n d v e r i f y t h e A / T R S w i t c h s i g n a l w i t h
t h e H D S i n t h e A / T D a t a L i s t .
Is the A/T R Switch ON?
Y E S — 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 at t h i s
t i m e . H
N O — G o t o s t e p 3.
3. 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).
4. D i s c o n n e c t t h e t r a n s m i s s i o n r a n g e s w i t c h
c o n n e c t o r .
5. 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 t r a n s m i s s i o n r a n g e
s w i t c h c o n n e c t o r t e r m i n a l N o . 6 a n d b o d y g r o u n d .
T R A N S M I S S I O N R A N G E S W I T C H C O N N E C T O R
1 2 3 4
5
6 7 8 9 10
G N D ( B L K )
W i r e 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 6.
N O — R e p a i r o p e n i n t h e w i r e b e t w e e n t r a n s m i s s i o n
r a n g e s w i t c h 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 9.
6. 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).
7. M e a s u r e t h e v o l t a g e b e t w e e n t r a n s m i s s i o n r a n g e
s w i t c h c o n n e c t o r t e r m i n a l s N o . 6 a n d N o . 8.
T R A N S M I S S I O N R A N G E S W I T C H C O N N E C T O R
1 2 3 4 5
6 7 8 9 10
G N D ( B L K ) A T P R ( W H T )
W i r e s i d e o f f e m a l e t e r m i n a l s
Is there around battery voltage?
Y E S — G o t o s t e p 8.
N O — R e p a i r o p e n i n t h e w i r e b e t w e e n t h e
t r a n s m i s s i o n r a n g e s w i t c h a n d P C M c o n n e c t o r
t e r m i n a l C 2 5 , t h e n g o t o s t e p 9 .
8. 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 t r a n s m i s s i o n r a n g e
s w i t c h c o n n e c t o r t e r m i n a l s N o . 6 a n d N o . 8 w h i l e
t h e s h i f t l e v e r is i n R, a n d w h e n t h e s h i f t l e v e r is
s h i f t e d t o a n y p o s i t i o n o t h e r t h a n R.
T R A N S M I S S I O N R A N G E S W I T C H C O N N E C T O R
1
2 3 4 5
6 7 8 9 10
G N D A T P R
T e r m i n a l s i d e o f m a l e t e r m i n a l s
Is there continuity when the shift lever is in R, and
no continuity when the shift lever is shifted to any
position other than R?
Y E S — G o t o s t e p 15.
N O — R e p l a c e t h e t r a n s m i s s i o n r a n g e s w i t c h
( s e e p a g e 1 4 - 2 6 6 ) , t h e n g o t o s t e p 1 2 .
( c o n t ' d )
14-139