Honda Accord 2008 Manual page 1071

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S h i f t C o n t r o l - G r a d e L o g i c C o n t r o l
T h e g r a d e l o g i c c o n t r o l s y s t e m h a s b e e n a d o p t e d t o c o n t r o l s h i f t i n g i n D a n d D 3 . T h e P C M c o m p a r e s a c t u a l d r i v i n g
c o n d i t i o n s w i t h p r o g r a m m e d d r i v i n g c o n d i t i o n s , b a s e d o n t h e i n p u t f r o m t h e a c c e l e r a t o r p e d a l p o s i t i o n s e n s o r , t h e
e n g i n e c o o l a n t t e m p e r a t u r e s e n s o r , t h e b a r o m e t r i c p r e s s u r e s e n s o r , t h e b r a k e p e d a l p o s i t i o n s w i t c h s i g n a l , a n d t h e
s h i f t l e v e r p o s i t i o n s i g n a l , t o c o n t r o l s h i f t i n g w h i l e t h e v e h i c l e is a s c e n d i n g o r d e s c e n d i n g a s l o p e .
E n g i n e R P M S i g n a l
T r a n s m i s s i o n R a n g e
S w i t c h S i g n a l
A c c e l e r a t o r P e d a l
P o s i t i o n S e n s o r
S i g n a l
T h r o t t l e P o s i t i o n
S e n s o r S i g n a l
Output Shaft
{Countershaft)
S p e e d S e n s o r Signal
input Shaft
(Mainshaft)
S p e e d S e n s o r Signal
A T F T e m p e r a t u r e
S e n s o r S i g n a l
Barometric Pressure
S e n s o r Signal
E n g i n e C o o l a n t
T e m p e r a t u r e
S e n s o r S i g n a l
Brake Pedal Position
S w i t c h Signal
V S A M o d u l a t o r - c o n t r o l
U n i t S i g n a l
C r u i s e C o n t r o l
M o d u l e S i g n a l
A c t u a l
D r i v i n g
S h i f t
P o s i t i o n h
PCM
E n g i n e R P M C o n t r o l
S h i f t P o s i t i o n
C o n t r o l
F a i l - s a f e C o n t r o l
Read of ATF
Temperature
M a s t e r T a r g e t of
S h i f t i n g P o s i t i o n
Correction of Data
Selection of
Shifting Mode
G r a d e Logic Control
C a l c u l a t i o n o f
G r a d i e n t
Correction for Engine
Coolant Temperature
Sensor Signal Data
C o r r e c t i o n for V S A
M o d u l a t o r - c o n t r o l
U n i t S i g n a l D a t a
Correction for Cruise
Control Signal Data
by Downshift
Request Signal
C o m p a r i s o n
w i t h
S i g n a l s
Shift Solenoid Valve A
Shift Solenoid Valve B
Shift Solenoid Valve C
Shift Solenoid Valve D
( c o n t ' d )
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