Yamaha MT-03 Service Manual page 381

Continuity
Positive tester probe
sky blue "1"
Negative tester probe
black/yellow "2"
No continuity
Positive tester probe
black/yellow "2"
Negative tester probe
sky blue "1"
Continuity
Positive tester probe
sky blue "1"
Negative tester probe
blue/yellow "3"
No continuity
Positive tester probe
blue/yellow "3"
Negative tester probe
sky blue "1"
Continuity
Positive tester probe
sky blue "1"
Negative tester probe
light green "5"
No continuity
Positive tester probe
light green "5"
Negative tester probe
sky blue "1"
Continuity
Positive tester probe
blue/green "4"
Negative tester probe
blue/yellow "3"
No continuity
Positive tester probe
blue/yellow "3"
Negative tester probe
blue/green "4"
a. Disconnect the relay unit coupler from the
wire harness.
b. Connect the pocket tester (Ω x 1) to the re-
lay unit terminal as shown.
c. Check the relay unit (diode) for continuity.
d. Check the relay unit (diode) for no continuity.
ELECTRICAL COMPONENTS
EAS28070
CHECKING THE SPARK PLUG CAP
1. Check:
• Spark plug cap resistance
Out of specification
Resistance
10.0 kΩ at 20 °C (68 °F)
a. Remove the spark plug cap from the spark
plug lead.
b. Connect the pocket tester (Ω x 1k) to the
spark plug cap as shown.
Pocket tester
90890-03112
c. Measure the spark plug cap resistance.
EAS28100
CHECKING THE IGNITION COIL
1. Check:
• Primary coil resistance
Out of specification
Primary coil resistance
3.4-4.6 Ω at 20 °C (68 °F)
a. Disconnect the ignition coil connectors from
the ignition coil terminals.
b. Connect the pocket tester (Ω x 1) to the igni-
tion coil as shown.
Pocket tester
90890-03112
• Positive tester probe
• Negative tester probe
8-54
Replace.
Replace.
red/black "1"
orange "2"