Checking The Diode; Checking The Spark Plug Caps; Checking The Ignition Coil - Yamaha 2009 XP500Y TMAX Service Manual

b. Turn the main switch to "ON".
c. Measure the turn signal relay output voltage.
L LLL L LLL L L LLL L L LLL L
EAS28050

CHECKING THE DIODE

1. Check:
• Diode 1
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/white "1"
Negative tester probe →
red/black "2"
No continuity
Positive tester probe →
red/black "2"
Negative tester probe →
blue/white "1"
1
2
M MMM M MMM M M MMM M M MMM M
a. Disconnect the diode 1 from the wire har-
ness.
b. Connect the pocket tester (Ω × 1) to the diode
1 terminals as shown.
L LLL L L LLL L LLL
L/W
R/B
M MMM M M MMM M MMM
8-71
ELECTRICAL COMPONENTS
c. Check the diode 1 for continuity.
d. Check the diode 1 for no continuity.
L LLL L LLL L L LLL L L LLL L
EAS28070

CHECKING THE SPARK PLUG CAPS

The following procedure applies to all of the
spark plug caps.
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
c. Measure the spark plug cap resistance.
L LLL L LLL L L LLL L L LLL L
EAS28080

CHECKING THE IGNITION COIL

1. Check:
• Primary coil resistance
Out of specification → Replace.
Primary coil resistance
1.87–2.53 Ω
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.
L LLL L L LLL L LLL
M MMM M M MMM M MMM
L LLL L L LLL L LLL
M MMM M M MMM M MMM