Yamaha Fz6 N Service Manual

ELECTRICAL COMPONENTS
8-128
e. Check the coolant temperature sensor for continuity at the temperatures indicated in 
the table.
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EAS28300
CHECKING THE THROTTLE POSITION 
SENSOR
1. Remove:
 Throttle position sensor (from the throttle body)
2. Check:  Throttle position sensor
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a. Connect the pocket tester ( Ω ×  1k) to the 
throttle position sensor as shown.
b. Check the throttle position sensor maxi- mum resistance.
Out of specification  →...

ELECTRICAL COMPONENTS
8-129
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a. Connect the pocket tester (Ω ×  1) to the 
fuel pump coupler as shown.
b. Measure the fuel pump resistance.
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EAS28370
CHECKING THE AIR INDUCTION SYSTEM 
SOLENOID
1. Check:  Air induction system solenoid resistance Out of specification  → Replace.
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a. Remove the air induc tion system solenoid 
coupler from the wire harness.
b. Connect the pocket tester ( Ω ×  1) to the air 
induction...

ELECTRICAL COMPONENTS
8-130
c. Measure the intake air pressure sensor 
output voltage.
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EAS28420
CHECKING THE INTAKE AIR TEMPERA-
TURE SENSOR
1. Remove:
 Intake air temperature sensor (from the air filter case.)
WARNING
EWA14110
 Handle the intake air temperature sensor with special care.
 Never subject the intake air temperature  sensor to strong shocks. If the intake air 
temperature sensor is dropped, replace it.
2. Check:  Intake air temperature sensor resistance...

ELECTRICAL COMPONENTS
8-131 

9
TROUBLESHOOTING
TROUBLESHOOTING.................................................................................. 9-1
GENERAL INFORMATION ..................................................................... 9-1
STARTING FAILURES ............................................................................ 9-1
INCORRECT ENGINE IDLING  SPEED ................................................. 9-1
POOR MEDIUM-AND-HIGH-SPEED  PERFORMANCE ........................ 9-2
FAULTY GEAR SHIFTING...

TROUBLESHOOTING
9-1
EAS28450
TROUBLESHOOTING
EAS28460
GENERAL INFORMATION
NOTE:
The following guide for troubleshooting does 
not cover all the possible causes of trouble. It 
should be helpful, however, as a guide to basic 
troubleshooting. Refer to the relative proce-
dure in this manual for checks, adjustments, 
and replacement of parts.
EAS28470
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head(s) Loose spark plug
 Loose cylinder head or cylinder
 Damaged cylinder head gasket
 Damaged...

TROUBLESHOOTING
9-2
 Improper throttle cable free play
 Flooded throttle body
 Faulty air induction system
Electrical system
1. Battery  Discharged battery
 Faulty battery
2. Spark plug(s)  Incorrect spark plug gap
 Incorrect spark plug heat range
 Fouled spark plug
 Worn or damaged electrode
 Worn or damaged insulator
 Faulty spark plug cap
3. Ignition coil(s)  Broken or shorted primary or secondary 
coils
 Faulty spark plug lead
 Cracked or broken ignition coil
4. Ignition system ...

TROUBLESHOOTING
9-3
2. Engine oil Incorrect oil level
 Incorrect oil viscosity
 Inferior oil quality
Cooling system
1. Coolant  Low coolant level
2. Radiator  Damaged or leaking radiator
 Faulty radiator cap
 Bent or damaged radiator fin
3. Water pump  Damaged or faulty water pump
 Thermostat
 Thermostat stays closed
Oil cooler
 Clogged or damaged oil cooler
 Hose(s) and pipe(s)
 Damaged hose
 Improperly connected hose
 Damaged pipe
 Improperly connected pipe
Fuel system
1. Throttle...

TROUBLESHOOTING
9-4
 Faulty rear shock absorber spring
 Leaking oil or gas
6. Tire(s)  Uneven tire pressures (front and rear)
 Incorrect tire pressure
 Uneven tire wear
7. Wheel(s)  Incorrect wheel balance
 Deformed cast wheel
 Damaged wheel bearing
 Bent or loose wheel axle
 Excessive wheel runout
8. Frame  Bent frame
 Damaged steering head pipe
 Improperly installed bearing race
EAS28710
FAULTY LIGHTING OR SIGNALING SYS-
TEM
Headlight does not come on
 Wrong headlight bulb
 Too many...

TROUBLESHOOTING
9-5
 Defective connection of the meter coupler
ABS warning light continues to flashes
 Brake light switch (front or rear) is defective
 Brake light switch front or rear coupler has come off
 Defective starter motor monitor
 Other defective
ABS warning light flashes every 0.5 sec-
onds
 Voltage drop (Less than 10 V)  Battery
 Rectifier/regulator
 AC magneto
 Strong radio waves or static electricity
 Test coupler adapter is connected to test  coupler
ABS Warning light continues...