Checking The Crankshaft Position Sensor; Checking The Lean Angle Sensor - Yamaha YZ 2018 Series Owner's Service Manual

b. Measure the primary coil resistance.
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3. Check:
• Secondary coil resistance
Out of specification  Replace.
Secondary coil resistance
8.64–12.96 k
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a. Connect the digital circuit tester () to the ig-
nition coil.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe 
Ignition coil terminal 1 "1"
• Negative tester probe 
Spark plug lead "2"
b. Measure the secondary coil resistance.
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EASB29B356
CHECKING THE CRANKSHAFT POSITION
SENSOR
1. Disconnect:
• Crankshaft position sensor coupler
(from the wire harness)
2. Check:
• Crankshaft position sensor resistance
Out of specification  Replace.
ELECTRICAL COMPONENTS
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a. Connect the digital circuit tester () to the
• Positive tester probe 
• Negative tester probe 
b. Measure the crankshaft position sensor re-
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EASB29B357

CHECKING THE LEAN ANGLE SENSOR

1. Remove:
• Lean angle sensor
2. Check:
1
• Lean angle sensor output voltage
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a. Connect the lean angle sensor coupler to
b. Connect the digital circuit tester (DC) to the
8-67
Crankshaft position sensor resis-
tance
228–342 
crankshaft position sensor coupler.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
Gray "1"
Black "2"
sistance.
(from the bracket)
Out of specification  Replace.
Lean angle sensor output voltage
Operating angle
45 °
Output voltage up to operating
angle
0.4–1.4 V
Output voltage over operating an-
gle
3.6–4.5 V
the wire harness.
lean angle sensor coupler as shown.
1 2
Gy B