Yamaha Fz 09 2014 Manual

,..,,... 
CHECKING THE AIR INDUCTION  SYSTEM 
Air Injection 
The air  induction  system burns unburned  ex­
haust  gases 
by inject ing  fresh  air (secondary  air) 
into  th e  ex haust  port,  reduc
ing  the  emission of 
hydrocarbons.  When there  is  negative pressure 
at the exhaust  port,  th e  reed va lve opens, allow ­
ing  secondary  air to flow in to  the  exhaust  port. 
The  requir
ed tempera ture for bur ning  the  un­
bur ned  exhaust  gases is approx imately 
600 to 
700 • c (1112 to 1292...

0 d 
d 
0 
2. Install: 
• 
Reed valve  assembly 1 
• Reed valve assembly 2 
TIP~~~~~~~~~~~~~~-
• Install th e  reed valve  assemb ly 1 so  that  th e 
open  side  turn s to  t he  exha ust  side 
of the en · 
gine . 
• Install th e  reed valve  assemb ly 2  so  th at  th e 
open  side turns  to the  intake  side  of th e  engine. 
A. Reed va lve assemb ly 1 
B . Reed va lve assemb ly 2 
C . Exhaust  side 
3 . 
Install: 
• 
Reed  valve cover 
Reed valve co ver bolt 
10 Nm (1.0  m·kgf,  7.2 ft·lbf)...

ELECTRICAL SYSTEM 
IG NITION SYSTEM .... ......... .... .... ............ .... ..... .... .... ................ .... ..... .... .... ........  8-1 
CIRCUIT  DIAGRAM ..... .... .... .... .... ............. .... .... .... .... .... .... .... ..... ........ .... ....  8-1 
ENGINE  STOPPING  DUE TO SIDESTAND  OPER ATI ON ........................  8-3 
TROUBLESHOOTING ..... ..... .... .... .... .... .... .... .... ..... .... .... .... .... .... .... ......... ....  8-4 
ELE CTRI C START ING SYSTEM...

CHECKING THE RELAY UNIT  (DIODE) .... .... .......... ........ ... ... ... ..... ... ... ....  8-99 
CHECKING THE IGNI TION COILS .... .... .... ...... ........ ... .... .... ...... ..... ... ... .. 8 -100 
CHECKING 
THE IGNI TION SPARK GAP .. .......... ... .... .... ....... ... ..... ... .... . 8-100 
CHECKING 
THE  CRANKSHAFT POSITION  SENSOR .............. .. ........ . 8-101 
CHECKING THE  LEAN  ANGLE SENSOR ... ...... ................. ............. ...... 8-101 
CHECKING THE  START ER MOTOR...

,..,,.., 
IGNITION SYSTEM 
EA$27110 
CIRCUIT DIAGRAM 
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IGNITION  SYSTEM 
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8-1  

3.  Ma in  switch 
4 .  Ma in  fuse 
9 . 
Ign it ion fuse 
13 .Ba
ttery 
14 .Eng ine  ground 
15. 
Fuel inj ect ion  system  fuse 
18.Jo i
nt connector 
19.Jo i
nt coupler 
20.Re lay 
un it 
23. ECU (eng ine contro l unit) 
24. lgn it ion coil #1 
25. I gn it ion coil #2 
26 . 
Ign it ion coil #3 
27 .Spa rk 
p lug 
33 . C rankshaft  posit ion senso r 
38 . Lean 
an gle senso r 
58 . Gea r pos iti
on senso r 
61.S idestand swi tch 
62.  Right 
hand le ba r 

switch 
64 . Start/e ngi
ne stop  switch...

IGNITION SYSTEM 
EA$1AC18M 
ENGINE  STOPPING DUE TO SID ESTAND OPERATION 
When  the engine  is  running  and the transmiss ion  is in gear,  the  engine  will  stop  if  the  sidestand  is 
moved  down. This is because  the 
electr ic current  from the ignit ion coils does not f low to  the ECU when 
both  th e  gear  position  sensor 
(neutral circu it) and sidestand  switch are set to OFP, thereby  preventing 
the  spa rk 
plugs from  producing a  spark.  Howeve r,  the eng ine  con tinues  to run...

IGNITION SYSTEM 
EA$27150 
TROUBLESHOOTING 
The ignition  system fails to operate  (no spark or intermittent  spark). 
TIP~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
• Before troubleshooting,  remove the following part(s): 
1.  Ri
der seat 
2. Air scoop 
3. Fuel tank cover 
4. Fuel tank 
5. Air filter case 
1. Check  the fuses. 
(Main,  i
gnition and fue l injectio n 
system)  Refer  to 
CHEC KING THE FUSES 
on page 8-93. 
OK.!. 
2 . Check  the battery. 
Refer  to 
CHECKING AND 
CHARGING THE BATTERY on 
page 8...

9. Check the  gear  position sensor 
Refer  to  CH ECK ING THE  GEAR 
POSITION  SENSOR on page 
8-11  o. 
OKt 
1 o.Check  the sidestand  switch. 
Refer  to 
 CHECK ING THE 
SWITCHES on  page  8-89. 
OKt 
11.Check  the relay unit  (d iode). 
Refer  to 
CHECK ING T H E  RELAY 
UNIT  (DIO DE) on  page  8-99. 
OKt 
12.Check  the lean  angle sensor . 
Refer  to 
CHEC KING THE  LEAN 
ANGLE 
SENSOR on  page 8-101. 
13.Check  the entire ign ition  systems 
wiring. 
Refer  to 
CIRCUIT  DIAGRAM  on 
page  8-1....