Honda Accord 2008 Manual page 778

Idle Control System
Alternator FR Signal Circuit
Troubleshooting
1 . S t a r t t h e e n g i n e , a n d l e t it i d l e .
2 . M o n i t o r t h e A L T E R N A T O R i n t h e D A T A L I S T w i t h
t h e H D S .
3. C h e c k if t h e i n d i c a t e d p e r c e n t a g e v a r i e s w h e n t h e
h e a d l i g h t s w i t c h is t u r n e d o n .
Does the percentage vary?
Y E S — T h e a l t e r n a t o r s i g n a l c i r c u i t is O K . •
N O — G o t o s t e p 4 .
4 . T u r n t h e h e a d l i g h t s w i t c h a n d i g n i t i o n s w i t c h O F F .
5. J u m p t h e S C S l i n e w i t h t h e H D S .
6. D i s c o n n e c t t h e a l t e r n a t o r 4 P c o n n e c t o r .
7 . D i s c o n n e c t E C M / P C M c o n n e c t o r C ( 4 9 P ) .
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 E C M / P C M c o n n e c t o r
t e r m i n a l C 4 4 a n d b o d y g r o u n d .
E C M / P C M C O N N E C T O R C ( 4 9 P )
3 | 4 | 5 | 6 | 7
8 | 9 110 |
I
11 12 13 CVl 16 17|18 19 20 21
• I
1
I
22
/
24
><
25
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26 27 28
• I
1
I
29 30
/
32 33 34 3 5 L / 37 38 39
• I
1
[ 4 0 J 41 4 2 | 4 3 | 4 4 | 4 5 | 4 6 47 1481491
A L T F ( W H T / R E D )
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 i n t h e w i r e b e t w e e n t h e E C M /
P C M (C44) a n d t h e a l t e r n a t o r . •
N O — U p d a t e t h e E C M / P C M if it d o e s n o t h a v e t h e
l a t e s t s o f t w a r e ( s e e p a g e 1 1 - 2 8 1 ) , o r s u b s t i t u t e a
k n o w n - g o o d E C M / P C M ( s e e p a g e 1 1 - 7 ) , t h e n
r e c h e c k . If t h e s y m p t o m / i n d i c a t i o n g o e s a w a y w i t h
a k n o w n - g o o d E C M / P C M , r e p l a c e t h e o r i g i n a l E C M /
P C M ( s e e p a g e 1 1 - 2 8 2 ) . •
PSP Switch Signal Circuit
Troubleshooting
1. S t a r t t h e e n g i n e , a n d l e t it i d l e .
2. A l i g n t h e s t e e r i n g w h e e l s t r a i g h t a h e a d .
3. C h e c k t h e P S P S W I T C H i n t h e D A T A L I S T w i t h t h e
H D S .
Does it indicate ON ?
Y E S — G o t o s t e p 4 .
N O — G o t o s t e p 14.
4 . T u r n t h e s t e e r i n g w h e e l t o t h e f u l l l o c k p o s i t i o n .
5. C h e c k t h e P S P S W I T C H i n t h e D A T A L I S T w i t h t h e
H D S .
Does it change to OFF?
Y E S — T h e P S P s w i t c h s i g n a l c i r c u i t is OK.M
N O — G o t o s t e p 6.
6. 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 ) .
7. D i s c o n n e c t t h e P S P s w i t c h 2 P c o n n e c t o r .
8 . S t a r t t h e e n g i n e .
9 . C h e c k t h e P S P S W I T C H i n t h e D A T A L I S T w i t h t h e
H D S .
Does it change to OFF?
Y E S — R e p l a c e t h e P S P s w i t c h . •
N O — G o t o s t e p 1 0 .
10. 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 1 . J u m p t h e S C S l i n e w i t h t h e H D S .
12. D i s c o n n e c t E C M / P C M c o n n e c t o r A ( 4 9 P ) .
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