Yamaha VINO YJ50RAP, Service Manual

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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. pickup coil resistance
8. main switch
9. engine stop switch
10.wiring (of the entire ignition system)
NOTE:
@
• Before troubleshooting, remove the following
part(s):
1) center cover
2) side cover (left)
3) side cover (right)
4) leg shield
• Troubleshoot with the following special
tool(s).
EAS00738
YES
NO
EAS00739
YES NO
EAS00740
YES
NO
The ignition system fails to operate (no
spark or intermittent spark).
Dynamic spark tester
YU-34487
Pocket tester
YU-03112
1. Main fuse
• Check the main fuse for continuity.
Refer to “CHECKING THE FUSE” in chap-
ter 3.
• Is the main fuse OK?
Replace the main
fuse.
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 20 °C (68 °F)
• Is the battery OK?
• Clean the battery
terminals.
• Recharge or
replace the bat-
tery.
3. Spark plug
• Check the condition of the spark plug.
• Check the spark plug type.
• Measure the spark plug gap.
Refer to “CHECKING THE SPARK PLUG”
in chapter 3.
Standard spark plug
BPR7HS (NGK)
Spark plug gap
0.6 ~ 0.7 mm (0.02 ~ 0.03 in)
• Is the spark plug in good condition, is it of
the correct type, and is its gap within spec-
ification?
Re-gap or replace
the spark plug.
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