Honda Accord 2008 Manual page 686

Electronic Throttle Control System
DTC Troubleshooting (cont'd)
DTC P0123: TP Sensor A Circuit High Voltage
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 , a n d r e v i e w t h e 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 11-3).
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 P S E N S O R A i n t h e D A T A L I S T w i t h t h e
H D S .
Is there about 4.8 V or more?
Y E S — G o t o s t e p 4 .
N O — 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 p o o r c o n n e c t i o n s o r l o o s e t e r m i n a l s
a t t h e t h r o t t l e b o d y a n d t h e E C M / P C M . •
4 . C h e c k f o r T e m p o r a r y D T C s o r D T C s w i t h t h e H D S .
Are DTC P0123 and P0223 indicated at the same
time?
Y E S — G o t o s t e p 13.
N O — G o t o s t e p 5.
5. 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).
6. D i s c o n n e c t t h e t h r o t t l e b o d y 6 P c o n n e c t o r .
7. 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).
8. 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 h r o t t l e b o d y 6 P
c o n n e c t o r t e r m i n a l N o . 1 a n d b o d y g r o u n d .
THROTTLE BODY 6P CONNECTOR
1 2 3 4 5 6
T P S A (RED/BLK)
Wire side of female terminals
Is there about 5 V?
Y E S — G o t o s t e p 18.
N O — G o t o s t e p 9.
9. 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).
10. J u m p t h e S C S l i n e w i t h t h e H D S .
1 1 . 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 B ( 4 9 P ) .
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