Honda Accord 2008 Manual page 1173

DTC P0872: Short in 4th Clutch Transmission
Fluid Pressure Switch Circuit or 4th Clutch
Transmission Fluid Pressure Switch Stuck
ON
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 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. 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. C l e a r t h e D T C w i t h t h e H D S .
3. C h e c k t h e 4 t h P r e s s u r e 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 w h e n n o t i n 4 t h g e a r .
Is the 4th Pressure Switch OFF?
Y E S — G o t o s t e p 4.
N O — G o t o s t e p 7.
4. S t a r t t h e e n g i n e , a n d w a r m it u p t o n o r m a l
o p e r a t i n g t e m p e r a t u r e ( t h e r a d i a t o r f a n c o m e s o n ) .
5. T e s t - d r i v e t h e v e h i c l e i n 5 t h g e a r i n D f o r a t l e a s t
2 s e c o n d s , t h e n s l o w d o w n t o a s t o p .
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 8 7 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 t h e
O P 4 S W w i r e f o r a n i n t e r m i t t e n t s h o r t t o b o d y
g r o u n d i n t h e w i r e b e t w e e n t h e 4 t h c l u t c h
t r a n s m i s s i o n f l u i d p r e s s u r e s w i t c h a n d t h e P C M . 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. D i s c o n n e c t t h e 4 t h c l u t c h t r a n s m i s s i o n f l u i d
p r e s s u r e s w i t c h c o n n e c t o r .
9. 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).
10. C h e c k t h e 4 t h P r e s s u r e 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 4th Pressure Switch OFF?
Y E S — R e p l a c e t h e 4 t h c l u t c h t r a n s m i s s i o n f l u i d
p r e s s u r e s w i t c h ( s e e p a g e 1 4 - 2 2 9 ) , t h e n g o t o s t e p
19.
N O — G o t o s t e p 1 1 .
1 1 . 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).
1 2 . J u m p t h e S C S l i n e w i t h t h e H D S .
13. D i s c o n n e c t P C M c o n n e c t o r C ( 4 9 P ) .
14. 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 C 3 7 a n d b o d y g r o u n d .
P C M C O N N E C T O R C ( 4 9 P )
[ , | 2
3 4 | 5 | 6 | 7 8
9 | 1 0 |
11 12 (13) A* 16 1718 19 20 21
22
/
24
^<
25 26 27 28
m
30
/
32 33 34
4 /
37 38 39
|40|41 42
431441/| 46
47 AA
O P 4 S W ( B L U / 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 — R e p a i r s h o r t t o b o d y g r o u n d i n t h e w i r e
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 C 3 7 a n d t h e 4 t h
c l u t c h t r a n s m i s s i o n f l u i d p r e s s u r e s w i t c h , t h e n g o
t o s t e p 15.
N O — G o t o s t e p 2 2 .
( c o n t ' d )
14-151