Checking The Diode; Checking The Spark Plug Caps - Yamaha 2007 XP500 Service Manual

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EAS28050

CHECKING THE DIODE

1. Check:
Starting circuit cut-off relay 1 diode
G
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Continuity
Positive tester probe → Red/
Black "1"
Negative tester probe → Light
green "2"
No continuity
Positive tester probe → Red/
Black "2"
Negative tester probe → Light
green "1"
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a. Disconnect the starting circuit cut-off relay 1
from the wire harness.
b. Connect the pocket tester (Ω× 1) to the start-
ing circuit cut-off relay 1 as shown.
c. Check the starting circuit cut-off relay 1 diode
for continuity.
Positive tester probe
Light green "1"
Negative tester probe
Red/Black "2"
d. Check the starting circuit cut-off relay diode
for no continuity.
Positive tester probe
Red/Black "1"
Negative tester probe
Light green "2"
ELECTRICAL COMPONENTS
NOTE:
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
G
Out of specification → Replace.
Resistance
10.0 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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