Yamaha XV19SX(C) Service Manual page 474

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
NOTE:
The pocket tester and the analog pocket tester
readings are shown in the following table.
Continuity
Positive tester probe →
red/white "1"
Negative tester probe →
black/red "2"
No continuity
Positive tester probe →
black/red "2"
Negative tester probe →
red/white "1"
1
2
M MMM M MMM M M MMM M M MMM M
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.
L LLL L LLL L L LLL L L LLL L
ET1D71012
CHECKING THE IGNITION SPARK GAP
1. Check:
• Ignition spark gap
Out of specification → Perform the ignition
system troubleshooting, starting with step 5.
Refer to "TROUBLESHOOTING" on page
7-4.
Minimum ignition spark gap
6.0 mm (0.24 in)
NOTE:
If the ignition spark gap is within specification,
the ignition system circuit is operating normally.
R/W
B/R
M MMM M M MMM M MMM
L LLL L L LLL L LLL
7-83
ELECTRICAL COMPONENTS
M MMM M MMM M M MMM M M MMM M
a. Disconnect the spark plug cap from the spark
plug.
b. Connect the ignition checker "1" as shown.
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
2. Spark plug cap
c. Turn the main switch to "ON" and engine stop
switch to " ".
d. Measure the ignition spark gap "a".
e. Crank the engine by pushing the start switch
" " and gradually increase the spark gap un-
til a misfire occurs.
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
M MMM M M MMM M MMM
L LLL L L LLL L LLL
M MMM M M MMM M MMM