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8-2
9Radiator fan motor relay
10Turn signal relay
11Rectifier / regulator
12Throttle position sensor
13Sub-throttle position sensor
1Coolant temperature sensor
2Intake air temperature sensor
3Intake air pressure sensor
4Fuel pump
5ECU
6Lean angle cut-off switch
7Starting circuit cut-off relay
8Headlight relay (dimmer)
ELECTRICAL COMPONENTSELEC
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8-10
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
YESNO
EAS00741
3. Spark plugs
The following procedure applies to all of the
spark plugs.
Check the condition of the spark plug.
Check the spark plug type.
Measure the spark plug gap.
Refer to “CHECKING THE SPARK PLUGS”
in chapter 3.
Standard spark plug
CR9EK (NGK)
Spark plug gap
0.6 0.7 mm (0.0236 0.0276 in)
Is the spark plug in good condition, is it of the
correct type, and is its gap within specifica-
tion?
Re-gap or replace
the spark plug.
IGNITION SYSTEMELEC
NOTE:
YESNO
1. Main and ignition fuses
Check the main and ignition fuses for conti-
nuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Are the main and ignition fuses OK?
Replace the fuse(s).
EAS00737
TROUBLESHOOTING
The ignition system fails to operate (no
spark or intermittent spark).
Check:
1. main and ignition fuses
2. battery
3. spark plugs
4. ignition spark gap
5. ignition coil resistance
6. crankshaft position sensor
7. main switch
8. engine stop switch
9. neutral switch
10. sidestand switch
11. clutch switch
12. starting circuit cut-off relay (diode)
13. lean angle cut-off switch
14. wiring connections
(of the entire ignition system)
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
Troubleshoot with the following special tool(s).
Ignition checker
90890-06754
Dynamic spark tester
YM-34487
Pocket tester
90890-03112, YU-3112
EAS00738
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8-13
IGNITION SYSTEMELEC
12. Starting circuit cut-off relay (diode)
Disconnect the starting circuit cut-off relay
coupler from the wire harness.
Connect the pocket tester (Ω 1) to the
starting circuit cut-off relay coupler as
shown.
Check the starting circuit cut-off relay for
continuity.
Positive tester probe
blue / yellow
Negative tester probe
sky blue
1
2
EAS00753
Positive tester probe
blue / yellow
Negative tester probe
blue / black Continuity
1
3
Positive tester probe
sky blue
Negative tester probe
blue / yellow
2
1
Positive tester probe
blue / black
Negative tester probe
blue / yellow No
continuity
3
1
YESNO
Replace the starting
circuit cut-off relay. When you switch the positive and negative
tester probes, the readings in the above chart
will be reversed.
Are the tester readings correct?
NOTE:
13. Lean angle cut-off switch
Check the lean angle cut-off switch.
Refer to “FUEL INJECTION SYSTEM” in
chapter 7.
Is the lean angle cut-off switch OK?
YESNO
Replace the lean
angle cut-off switch.
EAS00754
14. Wiring
Check the entire ignition system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
Is the ignition system’s wiring properly con-
nected and without defects?
YESNO
Properly connect or
repair the ignition
system’s wiring.
Replace the ECU.
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8-16
YESNO
3. Starter motor
Connect the positive battery terminal and
starter motor lead with a jumper lead .
Repair or replace the
starter motor. A wire that is used as a jumper lead
must have at least the same capacity or
more as that of the battery lead, other-
wise the jumper lead may burn.
This check is likely to produce sparks,
therefore make sure nothing flammable
is in the vicinity.
Does the starter motor turn?
WARNING
1
23
EAS00758
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
ELECTRIC STARTING SYSTEMELEC
NOTE:
YESNO
1. Main and ignition fuses
Check the main and ignition fuses for conti-
nuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Are the main and ignition fuses OK?
Replace the fuse(s).
EAS00757
TROUBLESHOOTING
The starter motor fails to turn.
Check:
1. main and ignition fuses
2. battery
3. starter motor
4. starting circuit cut-off relay
5. starter relay
6. main switch
7. engine stop switch
8. neutral switch
9. sidestand switch
10. clutch switch
11. start switch
12. wiring connections
(of the entire starting system)
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
4. throttle body assembly
Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738
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8-19
STARTER MOTORELEC
Order Job / Part Q’ty Remarks
1
2Removing the starter motor
Seat
Fuel tank
Throttle body assembly
Starter motor lead
Starter motor1
1Remove the parts in the order listed.
Refer to “SEAT” in chapter 3.
Refer to “FUEL TANK” in chapter 3.
Refer to “THROTTLE BODIES” in
chapter 7.
For installation, reverse the removal
procedure.
10 Nm (1.0 mkg, 7.2 ftlb)5 Nm (0.5 mkg, 3.6 ftlb)
5 Nm (0.5 mkg, 3.6 ftlb)
EAS00767
STARTER MOTOR
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8-25
NOYES
3. Charging voltage
Set the engine tachometer to the ignition coil
of cylinder #1.
Connect the pocket tester (DC 20 V) to the
battery as shown.
The charging circuit
is OK. Positive tester probe
positive battery terminal
Negative tester probe
negative battery terminal
Start the engine and let it run at approxi-
mately 5,000 r / min.
Measure the charging voltage.
Charging voltage
14 V at 5,000 r / min
Is the charging voltage within specification?
EAS00775
YESNO
Clean the battery
terminals.
Recharge or re-
place the battery.
Make sure the battery is fully charged.
NOTE:
Minimum open-circuit voltage
12.8 V or more at 20C (68F)
Is the battery OK?
CHARGING SYSTEMELEC
NOTE:
YESNO
1. Main fuse
Check the main fuse for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Is the main fuse OK?
Replace the fuse.
2. Battery
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
EAS00739 EAS00774
TROUBLESHOOTING
The battery is not being charged.
Check:
1. main fuse
2. battery
3. charging voltage
4. stator coil lead
5. stator coil resistance
6. wiring connections
(of the entire charging system)
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
EAS00738
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8-29
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.
EAS00784
YESNO 4. Dimmer switch
Check the dimmer switch for continuity.
Refer to “CHECKING THE SWITCHES”.
Is the dimmer switch OK?
The dimmer switch is
faulty. Replace the
left handlebar switch.
Minimum open-circuit voltage
12.8 V or more at 20C (68F)
Is the battery OK?
LIGHTING SYSTEMELEC
NOTE:
YESNO
1. Main, turn and headlight fuses
Check the main, turn and headlight fuses for
continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
Are the main, turn and headlight fuses OK?
Replace the fuse(s).
2. Battery
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
EAS00739EAS00781
TROUBLESHOOTING
Any of the following fail to light: headlight,
high beam indicator light, taillight, licence
light or meter light.
Check:
1. main, turn and headlight fuses
2. battery
3. main switch
4. dimmer switch
5. pass switch
6. headlight relay (on / off)
7. headlight relay (dimmer)
8. wiring connections
(of the entire lighting 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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8-35
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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