Checking The Engine Switch; Checking The Oil Level Switch - Yamaha MX250 Service Manual

ELECTRICAL COMPONENTS
2
1
a
b
2 2
1 1

CHECKING THE ENGINE SWITCH

1.
Check:
• Engine switch continuity
Out of specification  Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Disconnect the engine switch connectors.
b. Connect the digital circuit tester () to the engine
switch connectors as shown.
Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
Black "1"
• Negative tester probe 
Black "2"
c. Check the engine switch continuity.
• Engine switch "ON" 
Continuity "a"
• Engine switch "OFF" 
No continuity "b"
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

CHECKING THE OIL LEVEL SWITCH

1.
Disconnect:
• Oil level switch
(from the bottom of the crankcase cover)
2.
Check:
• Oil level switch continuity
Out of specification  Replace.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the digital circuit tester () to the oil level
switch as shown.
Model 88 Multimeter with tachometer:
YU-A1927
Digital circuit tester (CD732):
90890-03243
• Positive tester probe 
Oil level switch lead "1"
• Negative tester probe 
Body ground "2"
5-8
1
2
3
4
5
6
7
8
9
10