Checking The Spark Plug Caps; Checking The Ignition Coil - Yamaha 2012 TMAX XP500A Service Manual

c. Check the diode 2 for continuity.
d. Check the diode 2 for no continuity.
TIP
When you switch the positive and negative
tester probes, the readings in the above chart
will be reversed.
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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.
Resistance
7.5–12.5 kΩ
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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.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
c. Measure the spark plug cap resistance.
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EAS28080

CHECKING THE IGNITION COIL

1. Check:
• Primary coil resistance
Out of specification → Replace.
Primary coil resistance
1.87–2.53 Ω
ELECTRICAL COMPONENTS
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a. Disconnect the ignition coil connectors
from the ignition coil terminals.
b. Connect the pocket tester (Ω × 1) to the
ignition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe→
Red/black "1"
• Negative tester probe →
Orange "2"
c. Measure the primary coil resistance.
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2. Check:
• Secondary coil resistance
Out of specification → Replace.
Secondary coil resistance
12.00–18.00 kΩ
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a. Disconnect the spark plug cap from the
ignition coil.
b. Connect the pocket tester (Ω × 1k) to the
ignition coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe →
Spark plug lead "1"
• Negative tester probe →
Spark plug lead "2"
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