Yamaha MBK MW125 2014, Service Manual

Page: 360 / 380

ELECTRICAL COMPONENTS
8-63
10.Install:
• Center cover
Refer to “GENERAL CHASSIS (1)” on page
4-1.
EAS30553
CHECKING THE RELAYS
Check each switch for continuity with the pocket
tester. If the continuity reading is incorrect, re-
place the relay.
1. Disconnect the relay from the wire harness.
2. Connect the pocket tester (
Ω ×
1) and battery
(12 V) to the relay terminals as shown.
Check the relay operation.
Out of specification
→
Replace.
Starter relay
Starting circuit cut-off relay
Headlight relay
EAS30558
CHECKING THE IGNITION COIL
The following procedure applies to all of the igni-
tion coil.
1. Check:
• Primary coil resistance
Out of specification
→
Replace.
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Remove the ignition coil from the spark plug.
b. Connect the pocket tester (
Ω ×
1) to the igni-
tion coil as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between “3” and “4”)
1. Positive battery terminal
R
B
L / W G / Y
R R
1 2
4
3
Br
L / Y L / G
L / W
4
3
2
1
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between “3” and “4”)
1. Positive battery terminal
2. Negative battery terminal
3. Positive tester probe
4. Negative tester probe
Result
Continuity
(between “3” and “4”)
Primary coil resistance
2.16–2.64
Ω
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
→
red/white “1”
• Negative tester probe
→
orange “2”
+
Br
L
Br Y / B
1
2
3
4