Troubleshooting - Yamaha 5KM2-AE1 Service Manual

EB802010

TROUBLESHOOTING

IF THE IGNITION SYSTEM FAILS TO OPERATE (NO SPARK OR INTERMITTENT SPARK):
Procedure
Check:
1.Fuse (main, ignition)
2.Battery
3.Spark plug
4.Ignition spark gap
5.Spark plug cap resistance
6.Ignition coil resistance
NOTE:
Remove the following part(s) before trouble-
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shooting:
1)Seat
2)Fuel tank side panels
3)Front carrier
4)Front fender
Use the following special tool(s) for trouble-
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shooting.
EB802011
1.Fuse (main, ignition)
Refer to "CHECKING THE SWITCH".
EB802012
2.Battery
Check the battery condition.
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Refer to "CHECKING THE BATTERY" in
CHAPTER 3.
Open-circuit voltage:
12.8 V or more at 20 °C (68 °F)
3.Spark plug
Check the spark plug condition.
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Check the spark plug type.
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Check the spark plug gap.
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Refer to "CHECKING THE SPARK PLUG"
in CHAPTER 3.
CONTINUITY
CORRECT
9 - 9
IGNITION SYSTEM
7.Engine stop switch
8.Main switch
9.Pickup coil resistance
10.Charging/rotor rotation direction detection
coil resistance
11.Wiring connection (the entire ignition sys-
tem)
Dynamic spark tester:
P/N. YM-34487
Ignition checker:
P/N. 90890-06754
Pocket tester:
P/N. YU-03112, 90890-03112
NO CONTINUITY
Replace the fuse.
INCORRECT
Clean the battery terminals.
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Recharge or replace the battery.
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Standard spark plug:
DPR8EA-9/NGK
– +
ELEC