radiator YAMAHA YZF-R1SC 2004 Owner's Guide

8-46
YESNO
4. Radiator fan motor

Disconnect the radiator fan motor coupler
from the wire harness.

Connect the battery (DC 12 V) as shown.
The radiator fan mo-
tor is faulty and must
be replaced.
Positive battery lead
blue
Negative battery lead
black1
2

Does the radiator fan motor turn?
5. Radiator fan motor relay

Disconnect the radiator fan motor relay
form the wire harness.

Connect the pocket tester (Ω
1) and bat-
tery (12 V) to the radiator fan motor terminal
as shown.

Check the radiator fan motor for continuity.
Replace the radiator
fan motor relay.
NOYES
Battery positive terminal
red / white
Battery negative terminal

green / yellow 1
2

Does the radiator fan motor relay have conti-
nuity between red and brown / green?
Tester positive probe
red
Tester negative probe
brown / green3
4
COOLING SYSTEMELEC
EAS00809
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9-4
OVERHEATING / OVERCOOLING /
POOR BRAKING PERFORMANCETRBL
SHTG
FUEL SYSTEM
Throttle body (-ies)

Damaged or loose throttle body joint
Air filter

Clogged air filter element
CHASSIS
Brake(s)

Dragging brake
ELECTRICAL SYSTEMS
Spark plug(s)

Incorrect spark plug gap

Incorrect spark plug heat range
Ignition system

Faulty E.C.U.

Loose union bolt

Damaged brake hose

Oil or grease on the brake disc

Oil or grease on the brake pad

Incorrect brake fluid level
EAS00855
OVERHEATING
ENGINE
Clogged coolant passages

Cylinder head(s) and piston(s)

Heavy carbon buildup
Engine oil

Incorrect oil level

Incorrect oil viscosity

Inferior oil quality
COOLING SYSTEM
Coolant

Low coolant level
Radiator

Damaged or leaking radiator

Faulty radiator cap

Bent or damaged radiator fin
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
EAS00856
OVERCOOLING
COOLING SYSTEM
Thermostat

Thermostat stays open
EAS00857
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
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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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