warning light YAMAHA YZF-R1SC 2004 Owner's Manual

8-7
CHECKING THE BULBS AND BULB SOCKETSELEC
NOTE:
NOTE:
WARNING
Pocket tester
90890-03112, YU-3112
Check each bulb socket for continuity in the
same manner as described in the bulb section;
however, note the following.
a. Install a good bulb into the bulb socket.
b. Connect the pocket tester probes to the re-
spective leads of the bulb socket.
c. Check the bulb socket for continuity. If any of
the readings indicate no continuity, replace
the bulb socket.
CHECKING THE LEDs
The following procedures applies to all of the
LEDs.
1. Check:

LED (for proper operation)
Improper operation
Replace.
a. Disconnect the meter assembly coupler (me-
ter assembly side).
b. Connect two jumper leads
1 from the bat-
tery terminals to the respective coupler ter-
minal.
As for connecting with which coupler terminal,
refer to “CABLE ROUTING” in chapter 2.

A wire that is used as a jumper lead must
have at least the same capacity of the bat-
tery lead, otherwise the jumper lead may
burn.

This check is likely to produce sparks,
therefore, make sure no flammable gas or
fluid is in the vicinity.
c. When the jumper leads are connected to the
terminals the respective LED should illumi-
nate.
Does not light
Replace the meter assem-
bly.
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8-35
SIGNALING SYSTEMELEC
1Main switch
4Fuse (main)
6Battery
10Starting circuit cut-off relay
11Neutral switch
13Fuel pump
14E.C.U.
27Speed sensor
38Fuel level warning light
39Oil level warning light
40Neutral indicator light
41Tachometer
42Shift timing indicator light
43Multi function meter
45Coolant temperature indicator light
47Turn signal indicator light (left)
48Turn signal indicator light (light)
55Turn signal relay
58Horn 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)
73Fuse (ignition)
74Fuse (signal)
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8-40
SIGNALING SYSTEMELEC
YESNO
Replace the starting
circuit cut-off relay.
YESNO 4. Voltage

Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
The wiring circuit
from the main switch
to the meter assem-
bly coupler is faulty
and must be re-
paired. Positive tester probe
brown
Negative tester probe
ground
1

Turn the main switch to “ON”.

Measure the voltage (DC 12 V) of brown
at the meter assembly coupler (wire harness
side).

Is the voltage within specification?
This circuit is OK.

Are the tester readings correct?
YESNO 1. Oil level warning light (LEDs)

Check the oil level warning light for continu-
ity.
When the main switch is turn to “ON”, the oil
level warning light is come on.

Are the oil level warning light OK?
Replace the meter
assembly.
EAS00802
5. The oil level warning light fails to come on.
YESNO 2. Oil level switch

Drain the engine oil and remove the oil level
switch from the oil pan.

Connect the pocket tester (Ω
100) to the
oil level switch as shown.
Replace the oil level
switch. Positive tester probe

Connector (white)
Negative tester probe
Body ground
1
12

Measure the oil level switch resistance.
Oil level switch resistance
114  126 Ω at 20C (68F)
484  536 Ω at 20C (68F)
1
2

Is the oil level switch OK?
2
When you switch the positive and negative
tester probes, the readings in the above
chart will be reversed.
NOTE:
1
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8-41
SIGNALING SYSTEMELEC
3. Voltage

Connect the pocket tester (DC 20 V) to the
meter assembly coupler (wire harness side)
as shown.
Positive tester probe
black / red
Negative tester probe
black / white
1
2

Turn the main switch to “ON”.

Measure the voltage (DC 12V) of black /
red and black / white at the meter as-
sembly coupler.

Is the voltage within specification?
12
YESNO
The wiring circuit
from the main switch
to the meter assem-
bly is faulty and must
be repaired.
This circuit is OK.
EAS00803
6. The fuel level warning light fails to come on.
1. Fuel sender

Drain the fuel from the fuel tank and remove
the fuel pump from the fuel tank.

Disconnect the fuel sender coupler from the
wire harness.

Connect the pocket tester (Ω
10) to the
fuel sender terminals as shown.
Positive tester probe
green / white
Negative tester probe
black
1
2
Fuel sender resistance
Full position of the float
20  26 Ω at 20C (68F)
Empty position of the float
134  140 Ω at 20C (68F)

Is the fuel sender OK? Measure the resistances when the float arm
is in contact with the full position and empty
position of the stopper.
NOTE:
Measure the fuel sender resistances.
YESNO
Replace the fuel
pump.
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8-53
SELF-DIAGNOSISELEC
SELF-DIAGNOSIS
The YZF-R1(S) features a self-diagnosing system for the following circuit(-s):

Fuel pump thermistor

Oil level switch
If any of these circuits are defective, their respective condition codes will be displayed on the warning
light when the main switch is turned “ON” (irrespective of whether the engine is running or not).
Circuit
Defect(-s)System responseCondition code
Fuel pump
thermistor
Open-circuit

Short-circuit
The fuel level warning light indi-
cate the condition code.Refer to *1
Oil level switch
Open-circuit

Short-circuit
The oil level warning light indicate
the condition code.Refer to *2
*1Condition code
Fuel level warning light
*
2Condition code
Oil level warning light
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8-54
SELF-DIAGNOSISELEC
L/B B
Lg
B
BG/W
B R/L
Y/LY/BR/G
Sb/W
W
G/W
G/W
R/L
B
R/W
LgLgB
Sb/WSb/WA
Br BrA
R/G R/GBB/R B/RBY/B Y/BBY/L Y/LBG/W G/WA
GY
14
3839
40
41
42
43
44
45
Repair or replace the
wire harness.
NO
1. Wire harness

Check the wire harness for continuity.
Refer to “CIRCUIT DIAGRAM”.

Is the wire harness OK?
YES
NO
2. Fuel pump thermistor

Check the fuel pump thermistor for continuity.
Refer to “The fuel level warning light fails to
come on”.

Is the fuel pump thermistor OK?
YES
Replace the fuel
pump.Replace the multi-
function meter.
NOTE:
14Fuel pump
45Multi-function meter
TROUBLESHOOTING
The warning light starts to indicate the
self-diagnosis sequence.
Check:
1. fuel pump thermistor
2. oil level switch

Before troubleshooting, remove the following
part(-s):
1. seat
2. fuel tank

Troubleshoot with the following special
tool(-s).
Pocket tester
90890-03112, YU-3112
1. Fuel pump thermistor
CIRCUIT DIAGRAM
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8-55
SELF-DIAGNOSISELEC
Replace the oil level
switch.
NO
2. Oil level switch

Check the oil level switch for continuity.
Refer to “The oil level warning light fails to
come on”.

Is the oil level switch OK?
YES
Repair or replace the
wire harness.
NO
1. Wire harness

Check the wire harness for continuity.
Refer to “CIRCUIT DIAGRAM”.

Is the wire harness OK?
YES
Replace the multi-
function meter.
B/WWW
Y/LY/BR/G
Sb/W
W
WG/W
R/WSb/WSb/WA
Br BrA
R/G R/GBB/R B/RBY/B Y/BBY/L Y/L
Dg
Ch
BG/W G/WA
B/W B/W
GY
B
40
41
42
43
44
45
46
47
48
49
50
51
52
45Multi-function meter
52Oil level switch
2. Oil level switch
CIRCUIT DIAGRAM
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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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