Page 449 of 457
9-1
STARTING FAILURES
TRBL
SHTG
NOTE:
FUEL SYSTEM
Fuel tankEmpty fuel tank
Clogged fuel filter
Clogged fuel strainer
Clogged fuel tank drain hose
Deteriorated or contaminated fuel
Fuel pump Faulty fuel pump
Faulty fuel pump relay
Throttle body (-ies)
Deteriorated or contaminated fuel
Sucked-in air
Ignition coil(s) Cracked or broken ignition coil body
Broken or shorted primary or secondary
coils
Ignition system Faulty ECU
Faulty crankshaft position sensor
EAS00844
TROUBLESHOOTING
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 procedure i\
n this manual for
checks, adjustments, and replacement of parts.
STARTING FAILURES
ENGINE
Cylinder(s) and cylinder head(s)
Loose spark plug
Loose cylinder head or cylinder
Damaged cylinder head gasket
Damaged cylinder 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
Piston(s) and piston ring(s) Improperly installed piston ring
Damaged, worn or fatigued piston ring
Seized piston ring
Seized or damaged piston
Air filter Improperly installed air filter
Clogged air filter element
Crankcase and crankshaft Improperly assembled crankcase
Seized crankshaft
ELECTRICAL SYSTEMS
Battery Discharged battery
Faulty battery
Fuse(s) Blown, damaged or incorrect fuse
Improperly installed fuse
Spark plug(s)
Incorrect spark plug gap
Incorrect spark plug heat range
Fouled spark plug
Worn or damaged electrode
Worn or damaged insulator
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Page 450 of 457
9-2
9
Starting systemFaulty starter motor
Faulty starter relay
Faulty starting circuit cut-off relay
Faulty starter clutch
STARTING FAILURES / INCORRECT ENGINE IDLING SPEED /
POOR MEDIUM-AND-HIGH-SPEED PERFORMANCETRBL
SHTG
ELECTRICAL SYSTEMS
Battery
Discharged battery
Faulty battery
Spark plug(s) Incorrect spark plug gap
Incorrect spark plug heat range
Fouled spark plug
Worn or damaged electrode
Worn or damaged insulator
Ignition coil(s)
Broken or shorted primary or secondary
coils
Cracked or broken ignition coil
Ignition system Faulty ECU
Faulty crankshaft position sensor
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
EAS00846
INCORRECT ENGINE IDLING SPEED
ENGINE
Cylinder(s) and cylinder head(s)
Incorrect valve clearance
Damaged valve train components
Air filter Clogged air filter element
FUEL SYSTEM
Throttle body (-ies) Damaged or loose throttle body joint
Improperly synchronized throttle bodies
Improperly adjusted engine idling speed (idle
adjusting screw)
Improper throttle cable free play
Flooded throttle body
Faulty air induction system
EAS00848
POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE
Refer to “STARTING FAILURES”.
ENGINE
Air filter
Clogged air filter element
FUEL SYSTEM
Fuel pump Faulty fuel pump
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Page 454 of 457
9-6
FAULTY LIGHTING OR SIGNALING SYSTEM
TRBL
SHTG
TURN 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 BLINKS 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 BLINKS 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
EAS00866
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 or light switch)
Burnt-out headlight bulb
HEADLIGHT BULB BURNT OUT
Wrong headlight bulb
Faulty battery
Faulty rectifier / regulator
Improperly grounded circuit
Faulty main switch
Faulty light switch
Headlight bulb life expired
TAIL / BRAKE LIGHT DOES NOT COME ON
Too many electrical accessories
Incorrect connection
TAIL / BRAKE LIGHT BULB BURNT OUT
Faulty battery
Incorrectly adjusted rear brake light switch
ProCarManuals.com
Page 455 of 457
59Clutch switch
60Turn signal switch
61Horn
62Front turn signal / position light (left)
63Front turn signal / position light (right)
64Rear turn signal light (left)
65Rear turn signal light (right)
66Headlight
67Auxiliary light
68License plate light
69Rear brake light switch
70Tail / brake light
71Headlight relay (on / off)
72Headlight relay (dimmer)
73Fuse (ignition)
74Fuse (signal)
75Fuse (headlight)
76Radiator fan motor relay
77Fuse (radiator fan motor left)
78Fuse (radiator fan motor light)
79Radiator fan motor 2
80Radiator fan motor 1
81Ground
COLOR CODE
B Black. . . . .
Br Brown. . . .
Ch Chocolate. . .
Dg Dark green. . .
G Green. . . .
Gy Gray. . .
L Blue. . . . .
Lg Light green. . . .
O Orange. . . .
P Pink. . . . .
R Red. . . . .
Sb Sky blue. . . .
W White. . . .
Y Yellow. . . . .
B / G Black / Green. .
B / L Black / Blue. . .
B / R Black / Red. .
B / W Black / White. .
B / Y Black / Yellow. .
Br / G Brown / Green.
Br / L Brown / Blue. .
Br / R Brown / Red. .
Br / W Brown / White.
G / B Green / Black. .
G / R Green / Red. .
G / W Green / White. . G / Y Green / Yellow. .
Gy / B Gray / Black.
Gy / G Gray / Green.
Gy / R Gray / Red.
L / B Blue / Black. . .
L / R Blue / Red. .
L / W Blue / White. .
L / Y Blue / Yellow. . .
O / B Orange / Black. .
O / G Orange / Green. .
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 / R White / Red. .
W / Y White / Yellow. .
Y / B Yellow / Black. .
Y / G Yellow / Green. .
Y / L Yellow / Blue. . .
Y / R Yellow / Red. .
Y / W Yellow / White. .
YZF-R1S / YZF-R1SC WIRING DIAGRAM
1Main switch
2A.C. magneto
3Rectifier / regulator
4Fuse (main)
5Fuse (backup)
6Battery
7Fuse (fuel injection)
8Starter relay
9Starter motor
10Starting circuit cut-off relay
11Neutral switch
12Sidestand switch
13Fuel pump
14E.C.U
15Ignition coil #1
16Ignition coil #2
17Ignition coil #3
18Ignition coil #4
19Spark plug
20Injector #1
21Injector #2
22Injector #3
23Injector #4
24Air induction system solenoid
25Sub-throttle position sensor
26EXUP servo motor
27Speed sensor
28Coolant temperature sensor
29Intake air temperature sensor
30Option switch
31Crankshaft position sensor
32Throttle position sensor
33Intake air pressure sensor
34Atmospheric pressure sensor
35Cylinder identification sensor
36Lean angle cut-off switch
37Meter assembly
38Fuel level warning light
39Oil level warning light
40Neutral indicator light
41Tacho meter
42Shift timing indicator light
43Multi function meter
44Engine trouble warning light
45Coolant temperature indicator light
46Hi beam indicator light
47Turn signal indicator light (left)
48Turn signal indicator light (light)
49Meter light
50Oil level switch
51Right handlebar switch
52Front brake light switch
53Engine stop switch
54Start switch
55Turn signal relay
56Left handlebar switch
57Dimmer switch
58Horn switch
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