Checking The Spark Plug Cap; Checking The Ignition Coil - Yamaha Grizzly550 User Manual

TIP
The pocket tester or the analog pocket tester
readings are shown in the following table.
No continuity
Positive tester probe → yel-
low/white "1"
Negative tester probe → yellow
"2"
Continuity
Positive tester probe → yellow
"2"
Negative tester probe → yel-
low/white "1"
Y
Y/W
M MMM M MMM M M MMM M M MMM M
a. Disconnect the diode 3 from the wire har-
ness.
b. Connect the pocket tester (Ω × 1) to the diode
3 coupler as shown.
c. Check the diode 3 for continuity.
d. Check the diode 3 for no continuity.
L LLL L LLL L L LLL L L LLL L
EAS28060

CHECKING THE SPARK PLUG CAP

1. Check:
• Spark plug cap resistance
Out of specification → Replace.
Resistance
10.0 kΩ
M MMM M MMM M M MMM M M MMM M
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
1
2
M MMM M M MMM M MMM
L LLL L L LLL L LLL
M MMM M M MMM M MMM
9-90
ELECTRICAL COMPONENTS
c. Measure the spark plug cap resistance.
L LLL L LLL L L LLL L L LLL L
EAS28090

CHECKING THE IGNITION COIL

1. Check:
• Primary coil resistance
Out of specification → Replace.
Primary coil resistance
2.16–2.64 Ω at 20 °C (68 °F)
M MMM M MMM M M MMM M M MMM M
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.
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.
L LLL L LLL L L LLL L L LLL L
2. Check:
• Secondary coil resistance
Out of specification → Replace.
L LLL L L LLL L LLL
M MMM M M MMM M MMM
L LLL L L LLL L LLL
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