Checking The Ignition Spark Gap; Checking The Crankshaft Position Sensor - Yamaha Vmax VMX17C 2009 Service Manual

c. Measure the primary coil resistance.
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2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
8.50–11.50 kΩ
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a. Disconnect the spark plug cap from the igni-
tion coil.
b. Connect the pocket tester (Ω × 1k) to the ig-
nition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Negative tester probe →
black/orange "1"
• Positive tester probe →
spark plug terminal "2"
c. Measure the secondary coil resistance.
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EAS28930

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
8-4.
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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8-132
ELECTRICAL COMPONENTS
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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
Opama pet-4000 spark checker
YM-34487
2. Ignition coil
c. Turn the main switch to "ON" and engine 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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EAS28120
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor coupler
(from the wire harness)
2. Check:
• Crankshaft position sensor resistance
Out of specification → Replace the crank-
shaft position sensor.
Crankshaft position sensor resis-
tance
192–288 Ω at 20 °C (68 °F)
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a. Connect the pocket tester (Ω × 100) to the
crankshaft position sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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L LLL L L LLL L LLL
M MMM M M MMM M MMM