Checking The Spark Plug Cap; Checking The Ignition Coil - Yamaha MBK XMAX 2014 Service Manual

▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Disconnect the diode 2 from the wire har-
ness.
b. Connect the pocket tester (Ω × 1) to the diode
2 terminals as shown.
c. Check the diode 2 for continuity.
d. Check the diode 2 for no continuity.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
Diode 3 (for YP250RA)
1. Check:
• Diode 3
Out of specification → Replace.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
TIP
The pocket tester and the analog pocket tester
readings are shown in the following table.
Continuity
Positive tester probe →
blue/green "1"
Negative tester probe →
red/black "2"
No continuity
Positive tester probe →
red/black "2"
Negative tester probe →
blue/green "1"
1
2
▼ ▼▼▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
a. Disconnect the diode 3 from the wire har-
ness.
b. Connect the pocket tester (Ω × 1) to the diode
3 terminals as shown.
c. Check the diode 3 for continuity.
d. Check the diode 3 for no continuity.
▲ ▲▲▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
L/G
R/B
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
ELECTRICAL COMPONENTS
▼▼▼
EAS28060

CHECKING THE SPARK PLUG CAP

1. Check:
• Spark plug cap resistance
Out of specification → Replace.
▲▲▲
▼ ▼▼▼ ▼ ▼▼▼ ▼
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.
▲ ▲▲▲ ▲ ▲▲▲ ▲
EAS28090

CHECKING THE IGNITION COIL

1. Check:
• Primary coil resistance
Out of specification → Replace.
▼ ▼▼▼ ▼ ▼▼▼ ▼
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.
▼▼▼
• Positive tester probe →
▲▲▲
red/black "1"
• Negative tester probe →
orange "2"
8-142
Resistance
10.0 kΩ
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲
Primary coil resistance
2.16–2.64 Ω
▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
▼ ▼▼▼ ▼ ▼▼▼
▲ ▲▲▲ ▲ ▲▲▲
▼ ▼▼▼ ▼ ▼▼▼