Yamaha 2003 AG200F Supplementary Service Manual - Elec
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ELEC
IGNITION SYSTEM
EAS00736
TROUBLESHOOTING
Check:
1. Main fuse
2. Battery
3. Spark plug
4. Ignition spark gap
5. Spark plug cap resistance
6. Ignition coil resistance
7. Main switch
8. Engine stop switch
9. Pickup coil resistance
10.Wiring connections (of the entire ignition sys-
tem)
NOTE:
9Before troubleshooting, remove the following
part(s):
1.Headlight unit
2.Seat
3.Fuel tank
9Troubleshoot with the following special tool(s).
Ignition checker:
90890-06754
Pocket tester:
90890-03112
The ignition system fails to operate (no
spark or intermittent spark).
EAS00740
3. Spark plug
9Check the condition of the spark plug.
9Check the spark plug type.
9Measure the spark plug gap.
Refer to “CHECKING THE SPARK PLUG” in
chapter 3.
9Is the spark plug in good condition, is it of
the correct type, and is its gap within specifi-
cation?
YES
NO
Re-gap or replace
the spark plug.
Standard spark plug
D8EA (NGK)
X24ES-U (DENSO)
Spark plug gap
0.6 ~ 0.7 mm
EAS00738
1. Main fuse
9Check the main fuse for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
9Is the main fuse OK?
YES
NO
Replace the fuse (s).
EAS00739
2. Battery
9Check the condition of the battery.
Refer to “CHECKING AND CHARGING THE
BATTERY” in chapter 3.
9Is the battery OK?
YES
NO
9Recharge or
replace the bat-
tery.
Minimum open-circuit voltage
12.8 V or more at 20 °C (68 °F)
9Clean the battery
terminals.