Yamaha Fz 09 2014 Manual

2. Check the  entire signaling systems 
wiring. 
Re fer  to 
CIRCUIT  DIAGRAM  on 
page 
8 -21. 
Rep lace  the ECU or meter assembly. 
Re fer  to  REPLAC ING THE ECU (en­
gine control  unit) on  page 8-93. 
The  speedomete r fail s to  opera te. 
1. Check  the speed  sensor . 
Re fer  to 
CHEC KING THE  SPEED 
SENSOR on page 8-105. 
2. Check the  entire signaling systems 
wi ring . 
Re fer  to 
CIRCUIT DIAGRAM  on 
page 
8 -21. 
Rep lace  the ECU or meter assembly. 
Refer  to  REPLAC ING THE ECU (en­...

EA$27300 
COOLING SYSTEM 
EA$27310 
CIRCUIT DIAGRAM 
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·-----· 
COOLING  SYSTEM 
-
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8-27  

3.  Ma in  swi tch 
4 .  Ma in  fuse 
7 .  Radiator 
fan  f use 
9 . 
Ignit ion fuse 
13 .Ba
ttery 
14.Eng ine  ground 
18.Jo in t co nnecto r 
23.ECU (engine contro l un it) 
35. 
Coo lant temperature  sensor 
85.  Rad iator  fan motor 
relay 
86.  Rad iator  fan motor 
COOLING  SYSTEM 
8-28  

COOLING SYSTEM 
TROUBLESHOOTING 
TIP~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
• Before troubleshooting,  remove the following part(s): 
1.  Ri
der seat 
2. Ai r scoop 
3. Fuel tan k cover 
4. Fuel tank 
5. Air filter case 
6. Throttle bodies 
1. Check  the fuses. 
(Main,  ignition  and  rad iator  fan) 
Refer  to 
 CHECKING THE FUSES 
on page 8-93 . 
OK.I. 
2. Check  the battery. 
Refer  to 
CHECKI NG AND 
CHARGING THE BATTERY on 
p age  8-94. 
OK.I. 
3. Check  the main swit ch . 
Refer  to 
CHECKING T H E 
SWI...

COOLING SYSTEM 
8-30  

EA$27S31 
FUEL INJECTION  SYSTEM 
EA$27S.C0 
CIRCUIT DIAGRAM 
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3.  Ma in  switch 
4 .  Ma in  fuse 
5 . 
E lec tr ic  thrott le va lve fuse 
9 . 
Ign it ion fuse 
11. Head light fuse 
13.Battery 
14.Eng ine  ground 
15. 
Fuel inj ect ion  sys tem fuse 
1 6.Starter 
re lay 
18.Joint connec to r 
1 9.Jo i
nt coup ler 
20.Re lay 
un it 
21. Sta rting  circuit  cut- off relay 
22.F uel 
pump re lay 
23 .ECU 
(eng ine contro l unit) 
24 .lgn it ion coil # 1 
25 .lgn it ion coil # 2 
26 .lgn it ion coil # 3 
27 .S park 
plug 
28 . In jector #  1 
29.lnjector #2 
30.ln...

FUEL INJECTION  SYSTEM 
EA$27$1 
ECU SELF-DIAGNOSTIC  FUNCTION 
The ECU is  equ ipped  with a self -diagnostic  functio n in order  to ensure  that the fu el injection  system  is 
operat
ing normally.  If this functio n detects  a malfunct ion in  the  system,  it immed iate ly operates  the en­
g
ine  un der  subst itute  characteristics  and illum inates the eng ine tro uble warning light t o a le rt the ride r 
that  a 
malfunc tion ha s occ urre d in  the  system. Once a malfunct io n has  been...

FUEL INJECTION  SYSTEM 
ECU detects an abnormal  signal from  a sensor 
If th e ECU detects  an abnorma l signa l from a sensor while the veh ic le is being  driven,  the ECU ill u mi­
nates  the eng ine troub le warn ing li gh t and  provides the engine  with alterna te operating  instructions  that 
are  appropriate  f
or the type  of malf unction. 
When  an abnorma l s ignal is  received  from a se nsor , the ECU processes  the specified values tha t are 
p rogrammed  for eac h se nsor 
in order to...

EA$30580 
TROUBLESH O OTING  METHOD 
The engine  op eration Is not normal and the 
eng in e t ro uble warning light com es on. 
1.  Check: 
• Fau lt code  numbe r 
TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT 
a. Check  the fault  code  number displayed on 
the  meter. 
b.  Identi fy  the 
fau lty system  with  the  fault  code 
n umbe r. 
c .  Ide ntify  the 
probab le cause  of  the malfunc ­
tio n. 
••••••••••••••••••\
•••••••••••••• 
2.  Chec k and  repair  the probab le cause of the 
ma l

function. 
Fault code...