Yamaha 2007 R6 Service

							ELECTRICAL COMPONENTS
8-98
NOTE:
When installing the throttle position sensor (for 
throttle valves), adjust its angle properly. Refer 
to “ADJUSTING THE THROTTLE POSITION 
SENSOR (FOR THROTTLE VALVES)” on page 
7-13.
ET2C01001
CHECKING THE THROTTLE POSITION 
SENSOR (FOR THROTTLE CABLE PULLEY)
1. Remove:
•Throttle position sensor (for throttle cable pul-
ley)
(from the throttle body)
2. Check:
•Throttle position sensor (for throttle cable pul-
ley) maximum resistance
Out of specification → Replace the throttle 
position sensor (for throttle cable pulley).



 
 
 








 
 



 
 



 
 







a. Connect the pocket tester (Ω × 1k) to the 
throttle position sensor (for throttle cable pul-
ley) terminal as shown.
b. Measure the throttle position sensor (for 
throttle cable pulley) maximum resistance.
         
3. Install:
•Throttle position sensor (for throttle cable pul-
ley)
NOTE:
When installing the throttle position sensor (for 
throttle cable pulley), adjust its angle properly. 
Refer to “ADJUSTING THE THROTTLE POSI-
TION SENSOR (FOR THROTTLE CABLE PUL-
LEY)” on page 7-13.
EAS28350
CHECKING THE FUEL PUMP
WARNING
EWA13850
Gasoline is extremely flammable and under 
certain circumstances there can be a danger 
of an explosion or fire. Be extremely careful 
and note the following points:
Stop the engine before refueling.
Do not smoke, and keep away from open 
flames, sparks, or any other source of fire.
If you do accidentally spill gasoline, wipe it 
up immediately with dry rags.
If gasoline touches the engine when it is 
hot, a fire may occur. Therefore, make sure 
the engine is completely cool before per-
forming the following test.
1. Disconnect:
•Fuel pump coupler
•Fuel sender coupler
(from the wire harness)
2. Remove:
•Fuel tank
3. Check:
•Fuel pump operation
Faulty/rough movement → Replace.



 
 
 








 
 



 
 



 
 



 



a. Fill the fuel tank.
b. Put the end of the fuel hose “1” into an open 
container.
c. Connect the battery (DC 12 V) to the fuel 
pump terminal as shown.
 
Resistance
2.0–3.0 kΩ
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
•Positive tester probe →
blue “1”
•Negative tester probe →
black/blue “2”
B/LW/RW L
2
1
•Positive battery lead →
red/blue “2”
•Negative battery lead →
black “3” 
						

							ELECTRICAL COMPONENTS
8-99
d. Check the fuel pump operation.
         
EAS28370
CHECKING THE AIR INDUCTION SYSTEM 
SOLENOID
1. Check:
•Air induction system solenoid resistance
Out of specification → Replace.



 
 
 








 
 



 
 



 
 







a. Disconnect the air induction system solenoid 
coupler from the air induction system sole-
noid.
b. Connect the pocket tester (Ω × 1) to the air in-
duction system solenoid terminal as shown.c. Measure the air induction system solenoid re-
sistance.
          
EAS28380
CHECKING THE ATMOSPHERIC PRESSURE 
SENSOR
1. Check:
•Atmospheric pressure sensor output voltage
Out of specification → Replace.



 
 
 








 
 



 
 



 
 



 



a. Connect the pocket tester (DC 20 V) to the at-
mospheric pressure sensor coupler as 
shown.
b. Turn the main switch to “ON”.
c. Measure the atmospheric pressure sensor 
output voltage.
          
 
Solenoid resistance
18–22 Ω at 20 °C (68 °F)
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
•Positive tester probe →
brown/red “1”
•Negative tester probe →
red/white “2”
R/LB
BG/W
3 2
1
 
Atmospheric pressure sensor 
output voltage
3.15–4.15 V
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
•Positive tester probe →
pink “1”
•Negative tester probe →
black/blue “2”
1
2
Br/R
R/W
PB/LL
12 
						

							ELECTRICAL COMPONENTS
8-100
EAS28390
CHECKING THE CYLINDER 
IDENTIFICATION SENSOR
1. Remove:
•Timing plate cover
2. Check:
•Cylinder identification sensor output voltage
Out of specification → Replace.



 
 
 








 
 



 
 



 
 







a. Connect the pocket tester (DC 20 V) to the 
cylinder identification sensor coupler (wire 
harness side) as shown.
b. Turn the main switch to “ON”.
c. Rotate the crankshaft.
d. Measure the voltage of white/black and 
black/blue. Turn the crankshaft twice and 
check that the output voltage rises to approx-
imately 4.8 V once.
         
EAS28410
CHECKING THE INTAKE AIR PRESSURE 
SENSOR
1. Check:
•Intake air pressure sensor output voltage
Out of specification → Replace.



 
 
 








 
 



 
 



 
 



 



a. Connect the pocket tester (DC 20 V) to the in-
take air pressure sensor coupler as shown.
b. Turn the main switch to “ON”.
c. Measure the intake air pressure sensor out-
put voltage.
          
ET2C01022
CHECKING THE AIR TEMPERATURE 
SENSOR
1. Remove:
•Air temperature sensor
WARNING
EW2C01002
Handle the air temperature sensor with 
special care.
Never subject the air temperature sensor to 
strong shocks. If the air temperature sen-
sor is dropped, replace it.
2. Check:
•Air temperature sensor resistance
Out of specification → Replace.
 
Cylinder identification sensor 
output voltage (ON)
Less than 0.8 V
Cylinder identification sensor 
output voltage (OFF)
More than 4.8 V
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
•Positive tester probe →
white/black “1”
•Negative tester probe →
black/blue “2”
 
Intake air pressure sensor output 
voltage
3.15–4.15 V
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
•Positive tester probe →
pink/white “1”
•Negative tester probe →
black/blue “2”
 
Air temperature sensor resis-
tance
290–390 Ω at 80 °C (176 °F)
P/WB/LL
12 
						

							ELECTRICAL COMPONENTS
8-101



 
 
 








 
 



 
 



 
 







a. Connect the pocket tester (Ω × 100) to the air 
temperature sensor terminal as shown.
b. Immerse the air temperature sensor “1” in a 
container filled with water “2”.
NOTE:
Make sure that the air temperature sensor termi-
nals do not get wet.
c. Place a thermometer “3” in the water.
d. Slowly heat the water, then let it cool down to 
the specified temperature.
e. Measure the air temperature sensor resis-
tance.
         
 
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
3
1
2 
						

							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 ....................................................................... 9-2
SHIFT PEDAL DOES NOT MOVE ............................................................ 9-2
JUMPS OUT OF GEAR ............................................................................ 9-2
FAULTY CLUTCH ..................................................................................... 9-2
OVERHEATING ........................................................................................ 9-2
OVERCOOLING ....................................................................................... 9-3
POOR BRAKING PERFORMANCE.......................................................... 9-3
FAULTY FRONT FORK LEGS.................................................................. 9-3
UNSTABLE HANDLING ............................................................................ 9-3
FAULTY LIGHTING OR SIGNALING SYSTEM ........................................ 9-4 
						

							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 trouble-
shooting. Refer to the relative procedure in this 
manual for checks, adjustments, and replace-
ment of parts.
EAS28470
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head
•Loose spark plug
•Loose cylinder head
•Damaged cylinder head gasket
•Worn or damaged cylinder
•Incorrect valve clearance
•Improperly sealed valve
•Incorrect valve-to-valve-seat contact
•Incorrect valve timing
•Faulty valve spring
•Seized valve
2. Piston(s) and piston ring(s)
•Improperly installed piston ring
•Damaged, worn or fatigued piston ring
•Seized piston ring
•Seized or damaged piston
3. Air filter
•Improperly installed air filter
•Clogged air filter element
4. Crankcase and crankshaft
•Improperly assembled crankcase
•Seized crankshaft
Fuel system
1. Fuel tank
•Empty fuel tank
•Clogged fuel tank drain hose
•Clogged rollover valve (for California only)
•Clogged rollover valve hoses (for California 
only)
•Deteriorated or contaminated fuel
2. Fuel pump
•Faulty fuel pump
•Faulty fuel pump relay
3. Throttle body(-ies)
•Deteriorated or contaminated fuel
•Sucked-in airElectrical system
1. Battery
•Discharged battery
•Faulty battery
2. Fuse(s)
•Blown, damaged or incorrect fuse
•Improperly installed fuse
3. Spark plug(s)
•Incorrect spark plug gap
•Incorrect spark plug heat range
•Fouled spark plug
•Worn or damaged electrode
•Worn or damaged insulator
4. Ignition coil(s)
•Cracked or broken ignition coil body
•Broken or shorted primary or secondary coils
5. Ignition system
•Faulty ECU
•Faulty crankshaft position sensor
•Faulty cylinder identification sensor
6. Switches and wiring
•Faulty main switch
•Faulty engine stop switch
•Broken or shorted wiring
•Faulty neutral switch
•Faulty start switch
•Faulty sidestand switch
•Faulty clutch switch
•Improperly grounded circuit
•Loose connections
7. Starting system
•Faulty starter motor
•Faulty starter relay
•Faulty starting circuit cut-off relay
•Faulty starter clutch
EAS28490
INCORRECT ENGINE IDLING SPEED
Engine
1. Cylinder(s) and cylinder head
•Incorrect valve clearance
•Damaged valve train components
2. Air filter
•Clogged air filter element
Fuel system
1. Throttle body(-ies)
•Damaged or loose throttle body joint
•Improperly synchronized throttle bodies
•Improper throttle cable free play
•Flooded throttle body
•Faulty air induction system 
						

							TROUBLESHOOTING
9-2
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
3. Ignition coil(s)
•Broken or shorted primary or secondary coils
•Cracked or broken ignition coil
4. Ignition system
•Faulty ECU
•Faulty crankshaft position sensor
•Faulty cylinder identification sensor
EAS28510
POOR MEDIUM-AND-HIGH-SPEED 
PERFORMANCE
Refer to “STARTING FAILURES” on page 9-1.
Engine
1. Air filter
•Clogged air filter element
Fuel system
1. Fuel pump
•Faulty fuel pump
EAS28530
FAULTY GEAR SHIFTING
Shifting is difficult
Refer to “Clutch drags”.
EAS28540
SHIFT PEDAL DOES NOT MOVE
Shift shaft
•Improperly adjusted shift rod
•Bent shift shaft
Shift drum and shift forks
•Foreign object in a shift drum groove
•Seized shift fork
•Bent shift fork guide bar
Transmission
•Seized transmission gear
•Foreign object between transmission gears
•Improperly assembled transmission
EAS28550
JUMPS OUT OF GEAR
Shift shaft
•Incorrect shift pedal position
•Improperly returned stopper lever
Shift forks
•Worn shift fork
Shift drum
•Incorrect axial play
•Worn shift drum groove
Transmission
•Worn gear dog
EAS28560
FAULTY CLUTCH
Clutch slips
1. Clutch
•Improperly assembled clutch
•Improperly adjusted clutch cable
•Loose or fatigued clutch spring
•Worn friction plate
•Worn clutch plate
2. Engine oil
•Incorrect oil level
•Incorrect oil viscosity (low)
•Deteriorated oil
Clutch drags
1. Clutch
•Unevenly tensioned clutch springs
•Warped pressure plate
•Bent clutch plate
•Swollen friction plate
•Bent clutch pull rod
•Broken clutch boss
•Burnt primary driven gear bushing
•Match marks not aligned
2. Engine oil
•Incorrect oil level
•Incorrect oil viscosity (high)
•Deteriorated oil
EAS28600
OVERHEATING
Engine
1. Clogged coolant passages
•Cylinder head and piston(s)
•Heavy carbon buildup 
						

							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 body(-ies)
•Damaged or loose throttle body joint
2. Air filter
•Clogged air filter element
Chassis
1. Brake(s)
•Dragging brake
Electrical system
1. Spark plug(s)
•Incorrect spark plug gap
•Incorrect spark plug heat range
2. Ignition system
•Faulty ECU
3. Cooling system
•Faulty radiator fan motor relay
•Faulty coolant temperature sensor
•Faulty ECU
EAS28610
OVERCOOLING
Cooling system
1. Thermostat
•Thermostat stays open
EAS28620
POOR BRAKING PERFORMANCE
•Worn brake pad•Worn brake disc
•Air in hydraulic brake system
•Leaking brake fluid
•Faulty brake caliper kit
•Faulty brake caliper seal
•Loose union bolt
•Damaged brake hose
•Oil or grease on the brake disc
•Oil or grease on the brake pad
•Incorrect brake fluid level
EAS28660
FAULTY FRONT FORK LEGS
Leaking oil
•Bent, damaged or rusty inner tube
•Cracked or damaged outer tube
•Improperly installed oil seal
•Damaged oil seal lip
•Incorrect oil level (high)
•Loose damper rod assembly
•Cracked or damaged cap bolt O-ring
Malfunction
•Bent or damaged inner tube
•Bent or damaged outer tube
•Damaged fork spring
•Worn or damaged outer tube bushing
•Bent or damaged damper rod
•Incorrect oil viscosity
•Incorrect oil level
EAS28680
UNSTABLE HANDLING
Handlebars
•Bent or improperly installed right handlebar
•Bent or improperly installed left handlebar
1. Steering head components
•Improperly installed upper bracket
•Improperly installed lower bracket
(improperly tightened ring nut)
•Bent steering stem
•Damaged ball bearing or bearing race
2. Front fork leg(s)
•Uneven oil levels (both front fork legs)
•Unevenly tensioned fork spring (both front 
fork legs)
•Broken fork spring
•Bent or damaged inner tube
•Bent or damaged outer tube
3. Swingarm
•Worn bearing or bushing
•Bent or damaged swingarm 
						

							TROUBLESHOOTING
9-4
Rear shock absorber assembly
•Faulty rear shock absorber spring
•Leaking oil or gas
Tire(s)
•Uneven tire pressures (front and rear)
•Incorrect tire pressure
•Uneven tire wear
Wheel(s)
•Incorrect wheel balance
•Deformed cast wheel
•Damaged wheel bearing
•Bent or loose wheel axle
•Excessive wheel runout
Frame
•Bent frame
•Damaged steering head pipe
•Improperly installed bearing race
EAS28710
FAULTY LIGHTING OR SIGNALING SYSTEM
Headlight does not come on
•Wrong headlight bulb
•Too many electrical accessories
•Hard charging
•Incorrect connection
•Improperly grounded circuit
•Poor contacts (main switch)
•Burnt-out headlight bulb
Headlight bulb burnt out
•Wrong headlight bulb
•Faulty battery
•Faulty rectifier/regulator
•Improperly grounded circuit
•Faulty main switch
•Headlight bulb life expired
Tail/brake light does not come on
•Wrong tail/brake light LED
•Too many electrical accessories
•Incorrect connection
•Burnt-out tail/brake light LED
Tail/brake light bulb burnt out
•Wrong tail/brake light LED
•Faulty battery
•Incorrectly adjusted rear brake light switch
•Tail/brake light LED life expiredTurn signal does not come on
•Faulty turn signal switch
•Faulty turn signal relay
•Burnt-out turn signal bulb
•Incorrect connection
•Damaged or faulty wire harness
•Improperly grounded circuit
•Faulty battery
•Blown, damaged or incorrect fuse
Turn signal flashes slowly
•Faulty turn signal relay
•Faulty main switch
•Faulty turn signal switch
•Incorrect turn signal bulb
Turn signal remains lit
•Faulty turn signal relay
•Burnt-out turn signal bulb
Turn signal flashes quickly
•Incorrect turn signal bulb
•Faulty turn signal relay
•Burnt-out turn signal bulb
Horn does not sound
•Improperly adjusted horn
•Damaged or faulty horn
•Faulty main switch
•Faulty horn switch
•Faulty battery
•Blown, damaged or incorrect fuse
•Faulty wire harness 
						

							EAS28740
WIRING DIAGRAM
YZFR6V(C) 2006
1. AC magneto
2. Rectifier/regulator
3. Main switch
4. Ignition fuse
5. Backup fuse (odometer and 
clock)
6. Main fuse
7. Battery
8. Starter relay
9. Fuel injection system fuse
10. Starter motor
11. Engine ground
12. ETV fuse
13. Relay unit
14. Starting circuit cut-off relay
15. Fuel pump relay
16. Neutral switch
17. Sidestand switch
18. Fuel pump
19. Fuel sender
20. Throttle position sensor (for 
throttle cable pulley)
21. Throttle position sensor (for 
throttle valves)
22. ECU (engine control unit)
23. Spark plug
24. Cylinder-#1 ignition coil
25. Cylinder-#2 ignition coil
26. Cylinder-#3 ignition coil
27. Cylinder-#4 ignition coil
28. Primary injector #1
29. Primary injector #2
30. Primary injector #3
31. Primary injector #4
32. Secondary injector #1
33. Secondary injector #2
34. Secondary injector #3
35. Secondary injector #4
36. Throttle servo motor
37. Air induction system solenoid
38. EXUP servo motor
39. O
2 sensor
40. Crankshaft position sensor
41. Air temperature sensor
42. Coolant temperature sensor
43. Intake air pressure sensor
44. Atmospheric pressure sensor
45. Cylinder identification sensor
46. Speed sensor
47. Lean angle sensor
48. Meter assembly
49. Fuel level warning light
50. Oil level warning light
51. Neutral indicator light
52. Tachometer
53. Shift timing indicator light
54. Multi-function meter55. Engine trouble warning light
56. Coolant temperature warning 
light
57. High beam indicator light
58. Left turn signal indicator light
59. Right turn signal indicator light
60. Meter light
61. Oil level switch
62. Right handlebar switch
63. Front brake light switch
64. Engine stop switch
65. Start switch
66. Turn signal relay
67. Left handlebar switch
68. Dimmer switch
69. Horn switch
70. Clutch switch
71. Turn signal switch
72. Horn
73. Rear right turn signal light
74. Rear left turn signal light
75. Front right turn signal/position 
light
76. Front left turn signal/position 
light
77. Headlight (low beam)
78. Headlight (high beam)
79. Auxiliary light
80. License plate light
81. Rear brake light switch
82. Tail/brake light
83. Headlight relay (on/off)
84. Headlight relay (dimmer)
85. Signaling system fuse
86. Headlight fuse
87. Radiator fan motor relay
88. Right radiator fan motor fuse
89. Left radiator fan motor fuse
90. Right radiator fan motor
91. Left radiator fan motor
EAS28750
COLOR CODE
BBlack
Br Brown
Ch Chocolate
Dg Dark green
G Green
Gy Gray
LBlue
Lg Light green
OOrange
PPink
RRed
Sb Sky blue
WWhite
Y Yellow
B/G Black/Green
B/L Black/Blue
B/R Black/Red
B/W Black/White
B/Y Black/YellowBr/B Brown/Black
Br/G Brown/Green
Br/L Brown/Blue
Br/R Brown/Red
Br/W Brown/White
Br/Y Brown/Yellow
G/B Green/Black
G/R Green/Red
G/W Green/White
G/Y Green/Yellow
Gy/G Gray/Green
Gy/R Gray/Red
L/B Blue/Black
L/R Blue/Red
L/W Blue/White
L/Y Blue/Yellow
Lg/R Light green/Red
O/B Orange/Black
O/G Orange/Green
P/B Pink/Black
P/W Pink/White
R/B Red/Black
R/G Red/Green
R/L Red/Blue
R/W Red/White
R/Y Red/Yellow
Sb/W Sky blue/White
W/B White/Black
W/L White/Blue
W/R White/Red
W/Y White/Yellow
Y/B Yellow/Black
Y/G Yellow/Green
Y/L Yellow/Blue
Y/R Yellow/Red