Yamaha XVS950CU 2014 Service Manual page 553

c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continuity.
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EAS1TP1005
CHECKING THE IGNITION SPARK GAP
1. Check:
• Ignition spark gap
Out of specification → Perform the ignition
system troubleshooting, starting with step 5.
Refer to "TROUBLESHOOTING" on page
7-6.
Minimum ignition spark gap
6.0 mm (0.24 in)
TIP
If the ignition spark gap is within specification,
the ignition system circuit is operating normally.
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a. Disconnect the spark plug cap from the spark
plug.
b. Connect the ignition checker "1" as shown.
Ignition checker
90890-06754
Oppama pet–4000 spark checker
YM-34487
2. Spark plug cap
c. Turn the main switch to "ON" and set the en-
gine stop switch to "
d. Measure the ignition spark gap "a".
e. Crank the engine by pushing the start switch
" " and gradually increase the spark gap un-
til a misfire occurs.
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EAS28070
CHECKING THE SPARK PLUG CAPS
The following procedure applies to all of the
spark plug caps.
1. Check:
• Spark plug cap resistance
Out of specification → Replace.
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".
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ELECTRICAL COMPONENTS
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a. Remove the spark plug cap from the spark
plug lead.
b. Connect the pocket tester (Ω × 1k) to the
spark plug cap as shown.
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c. Measure the spark plug cap resistance.
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EAS28100
CHECKING THE IGNITION COILS
The following procedure applies to all of the igni-
tion coils.
1. Check:
• Primary coil resistance
Out of specification → Replace.
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a. Disconnect the ignition coil connectors from
the ignition coil terminals.
b. Connect the pocket tester (Ω × 1) to the igni-
tion coil as shown.
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• Positive tester probe →
black/red "1"
• Negative tester probe →
orange or gray/red "2"
7-162
Resistance
7.5–12.5 kΩ
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Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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Primary coil resistance
2.16–2.64 Ω
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Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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