Yamaha XT250X - Checking the Diode; Checking the Spark Plug Cap

ELECTRICAL COMPONENTS
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EAS28050
CHECKING THE DIODE
1. Check:
● Diode2
● Diode3
Out of specification → Replace.
NOTE:
The following lists the specifications if you use
the pocket tester (90890-03132).
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a. Disconnect the diode from the wire harness.
b. Connect the pocket tester (Ω × 1) to the diode
coupler as shown.
c. Check the diode for continuity.
d. Check the diode for no continuity.
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EAS28060
CHECKING THE SPARK PLUG CAP
1. Check:
● Spark plug cap resistance
Out of specification → Replace.
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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.
c. Measure the spark plug cap resistance.
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Pocket tester
90890-03132
Diode2
Continuity
Positive tester probe → Blue/
white “1”
Negative tester probe → Blue/
black “2”
No continuity
Positive tester probe → Blue/
black “2”
Negative tester probe → Blue/
white “1”
Diode3
Continuity
Positive tester probe → Sky blue
“3”
Negative tester probe → Light
green “4”
No continuity
Positive tester probe → Light
green “4”
Negative tester probe → Sky
blue “3”
1
2
A
A. Diode2
B. Diode3
Resistance
10.0 kΩ
Pocket tester
90890-03132
3
4
B