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YESNO
Clean the battery
terminals.
Recharge or re-
place the battery.
EAS00749
3. Main switch
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the main switch OK?
YESNO
Replace the main
switch.
YESNO 1. Horn switch
Check the horn switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the horn switch OK?
Replace the left han-
dlebar switch.
EAS00796
CHECKING THE SIGNALING SYSTEM
1. The horn fails to sound.
EAS00795
4. Wiring
Check the entire signaling system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
Is the signaling system’s wiring properly
connected and without defects?
YESNO
Properly connect or
repair the signaling
system’s wiring.
Check the condition
of each of the signal-
ing system’s circuits.
Refer to “CHECK-
ING THE LIGHTING
SYSTEM”.
SIGNALING SYSTEMELEC
NOTE:
YESNO
1. Backup, main, ignition, signal and park
fuses
Check the backup, main, ignition, signal and
park fuses for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Are the backup, main, ignition, signal and
park fuses OK?
Replace the fuse(s).
2. Battery
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)
Is the battery OK?
EAS00739EAS00794
TROUBLESHOOTING
Any of the following fail to light: turn sig-
nal light, brake light or an indicator light.
The horn fails to sound.
Check:
1. backup, main, ignition, signal, and park
fuses
2. battery
3. main switch
4. wiring connections
(of the entire signaling system)
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
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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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8-45
YESNO 2. Battery
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)
Is the battery OK?
Clean the battery
terminals.
Recharge or re-
place the battery.
EAS00739
EAS00749
3. Main switch
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the main switch OK?
YESNO
Replace the main
switch.
COOLING SYSTEMELEC
NOTE:
YESNO
1. Main, ignition and radiator fan motor fuses
Check the main, ignition and radiator fan
motor fuses for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Are the main, ignition and radiator fan motor
fuses OK?
Replace the fuse(s).
EAS00808
TROUBLESHOOTING
The radiator fan motor fails to turn.
The coolant temperature indicator light
fails to light when the engine is warm.
Check:
1. main, ignition, and radiator fan motor fuses
2. battery
3. main switch
4. radiator fan motor
5. radiator fan motor relay
6. coolant temperature sensor
7. wiring connections
(the entire cooling system)
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
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8-48
1Main switch
4Fuse (main)
6Battery
7Fuse (fuel injection)
10Starting circuit cut-off relay
13Fuel pump
14E.C.U.
53Engine stop switch
FUEL PUMP SYSTEMELEC
EAS00814
FUEL PUMP SYSTEM
CIRCUIT DIAGRAM
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8-49
FUEL PUMP SYSTEMELEC
1Battery
2Fuse (main)
3Main switch
4Fuse (ignition)
5Engine stop switch
6ECU
7Fuse (fuel injection)
8Starting circuit cut-off relay (fuel injection
system relay)
9Fuel pump
EAS00815
FUEL PUMP SYSTEM
The ECU includes the control unit for the
fuel pump.
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8-50
FUEL PUMP SYSTEMELEC
YESNO 2. Battery
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)
Is the battery OK?
Clean the battery
terminals.
Recharge or re-
place the battery.
EAS00739
EAS00749
3. Main switch
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
YESNO
Replace the main
switch. Is the main switch OK?
EAS00750
4. Engine stop switch
Check the engine stop switch for continuity.
Refer to “CHECKING THE SWITCHES”.
YESNO
Replace the right
handlebar switch. Is the engine stop switch OK?
NOTE:
YESNO
1. Main, ignition and fuel injection system
fuses
Check the main, ignition and fuel system
fuses for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Replace the fuse(s).
Are the main, ignition and fuel injection sys-
tem fuses OK?
EAS00816
TROUBLESHOOTING
If the fuel pump fails to operate.
Check:
1. main, ignition and fuel injection fuses
2. battery
3. main switch
4. engine stop switch
5. starting circuit cut-off relay
(the fuel injection system relay)
6. fuel pump
7. wiring connections
(the entire fuel system)
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
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8-51
FUEL PUMP SYSTEMELEC
YESNO 5. Starting circuit cut-off relay (fuel injection
system relay)
Disconnect the starting circuit cut-off relay
coupler from the wire harness.
Connect the pocket tester (Ω 1) and bat-
tery (12 V) to the starting circuit cut-off relay
coupler as shown.
Replace the starting
circuit cut-off relay.
Positive battery lead red / black
Negative battery lead blue / yellow 1
2
Positive tester probe red
Negative tester probe red / blue3
4
Does the starting circuit cut-off relay have
continuity between red and red / blue?
YESNO 6. Fuel pump resistance
Disconnect the fuel pump coupler from the
wire harness.
Connect the pocket tester (Ω 1) to the fuel
pump coupler as shown.
Properly connect or
repair the fuel sys-
tem’s wiring.
1
2
Positive tester probe red / blue
Negative tester probe black
EAS00817
YESNO Fuel pump resistance
0.2 3.0 Ω at 20C (68F)
Is the fuel pump OK?
Replace the fuel
pump.
Measure the fuel pump resistance.
7. Wiring
Check the entire fuel pump system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
Is the fuel system’s wiring properly con-
nected and without defects?
EAS00818
Replace the ECU.
EAS00759
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FUEL PUMP SYSTEMELEC
WARNING
EAS00819
CHECKING THE FUEL PUMP
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. Check:
Fuel pump operation
a. Insert the plug
1 to fuel return hose end.
b. Fill the fuel tank.
c. Put the end of the fuel hose into an open con-
tainer.
d. Connect the battery (DC 12 V) to the fuel
pump coupler as shown.
Positive battery lead red / blue
2
Negative battery lead black 3
e. If fuel flows out of the fuel hose, the fuel pump
is OK. If fuel does not flow, replace the fuel
pump.
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