Troubleshooting - Yamaha 2002 YFM350X Supplemental Service Manual

EB802010

TROUBLESHOOTING

IF THE IGNITION SYSTEM FAILS TO OPERATE (NO SPARK OR INTERMITTENT SPARK):
Procedure
Check:
1.Fuse
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-
G
shooting:
1)Seat
2)Front fender
Use the following special tool(s) for trouble-
G
shooting.
EB802011
1.Fuse
Refer to "CHECKING THE SWITCH".
EB802012
2.Battery
Check the battery condition.
G
Refer to "BATTERY INSPECTION" in
CHAPTER 3. (Manual No.: 3GD-AE5)
Open-circuit voltage:
12.8 V or more at 20 °C (68 °F)
3.Spark plug
Check the spark plug condition.
G
Check the spark plug type.
G
Check the spark plug gap.
G
Refer to "SPARK PLUG INSPECTION" in
CHAPTER 3. (Manual No.: 3GD-AE5)
CONTINUITY
CORRECT
– 15 –
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
Refill with battery fluid.
G
Clean the battery terminals.
G
Recharge or replace the battery.
G
Standard spark plug:
DR8EA
– +
ELEC