Yamaha YBR250 2007, Service Manual

Page: 290 / 361

FI
FUEL INJECTION SYSTEM
6-17
F a u lt co d e N o . 1 5 S y m p to m T h ro ttle p o s itio n s e n so r: o p en o r s h o rt c ircu it d e fec te d .
D ia g n o s tic c o d e N o . D 0 1 T h ro ttle p o s itio n s e n so r
O rd e r
Ite m /c o m p o n e n ts a n d
p ro b ab le c a u s e
C h e c k o r m a in te n an c e jo b
R e in s ta te m e n t
m e th o d
1
In s ta lle d c o n d itio n o f
th ro ttle p o s itio n s e n s o r • C h e c k fo r lo o s e n e s s o r p in c h in g .
• C h e c k th a t th e s e n s o r is in sta lle d in th e
s p e c ifie d p o s itio n .
2
C o n n e c tio n s
• T h rottle p o s itio n s e n s o r
c o u p le r
• M a in w ire h a rn e s s E C U
c o u p le r • C h e c k th e c o u p le r fo r a n y p in s th a t m a y b e
p u lle d o u t.
• C h e c k th e lo c k in g c o n d itio n o f th e c o u p le r.
• If th e re is a m a lfu n ctio n , re p a ir it a n d
c o n n e c t th e c o u p le r s e c u re ly .
3
O p e n o r s h o rt c irc u it in w ire
h a rn e s s • R e p a ir o r re p la c e if th e re is a n o p e n o r
s h o rt c irc u it.
• B e tw e e n th ro ttle p o s itio n s e n s o r c o u p le r
a n d E C U c o u p le r
B la c k / B lu e - B la c k / B lu e
Y e llo w / B lu e - Y e llo w / B lu e
B lu e - B lu e
• C h e c k fo r o p e n c irc u it a n d re p la c e th e
th ro ttle p o s itio n s e n s o r.
O p e n c irc u it ite m O u tp u t v o lta g e
G ro u n d w ire
o p e n c irc u it 5 V
O u tp u t w ire o p e n
c irc u it 0 V
4
T h ro ttle p o s itio n s e n s o r
le a d w ire o p e n c irc u it
o u tp u t v o lta g e c h e c k
P o w e r s u p p ly
w ire o p e n c irc u it 0 V
T u rn in g th e m a in
s w itc h to “O N ”
5
D e fe c tiv e th ro ttle p o s itio n
s e n s o r. • E x e c u te th e d ia g n o s tic m o d e .
(C o d e
N o . D 0 1 )
• R e p la c e th ro ttle b o d y if d e fe ctiv e .
R e fe r to “T H R O T T L E B O D Y ”
Fault code no. 16 S ym ptom Throttle position s ensor is stuck.
D iagnos tic code N o. D 01 Throttle position sensor
O rder
Item /com ponents and
probable cause
C heck or m aintenance job
R e instatem ent
m ethod
1
In sta lle d c on d itio n of
th ro ttle p os itio n se ns or. • C h ec k fo r lo o se n es s o r p in ch in g.
• C h ec k th at th e s e ns or is ins talle d in
th e s pec ified p os itio n .
2
D e fec tiv e thro ttle
p ositio n s en s or • E xe cu te th e diagn o stic m od e.
(C o d e N o . D 01 )
• R e pla c e throttle bo dy if d efec tive .
R e fer to “T H R O T T L E B O D Y ”
S tartin g the
en g in e an d
op e ratin g it at idle,
an d th e n by rac in g
it.
Do not remove throttle body sensor
assembly
CAUTION:
Do not remove the throttle body sensor
assembly
CAUTION: