Checking The Diode; Checking The Ignition Spark Gap - Yamaha YZ 2017 Series Owner's Service Manual

Result
Continuity
(between "3" to "4")
Radiator fan motor relay
3
4
2
1
P/L
Br,R/W
R/L
R/W
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between "3" to "4")

CHECKING THE DIODE

EASB29B352
1. Check:
• Diode
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.
ELECTRICAL COMPONENTS
No continuity
Tester positive lead  Sky blue
"1"
Tester negative lead  Green/
Black "2"
Continuity
Tester positive lead  Green/
Black "2"
Tester negative lead  Sky blue
"1"
No continuity
Tester positive lead  Red "3"
Tester negative lead  Red/Blue
"4"
Continuity
Tester positive lead  Red/Blue
"4"
Tester negative lead  Red "3"
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the diode from the wire harness.
b. Connect the pocket tester (  1) to the di-
ode coupler as shown.
c. Check the diode for continuity.
d. Check the diode for no continuity.
1
Sb
G/B
2
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

CHECKING THE IGNITION SPARK GAP

EASB29B353
1. Check:
• Ignition spark gap
Out of specification  Perform the ignition
system troubleshooting, starting with step 4.
Refer to "TROUBLESHOOTING" on page 8-
4.
Minimum ignition spark gap
6.0 mm (0.24 in)
TIP
If the ignition spark gap is within specification,
the ignition system circuit is operating normally.
8-68
3
R
R/L
4