Checking The Crankshaft Position Sensor; Checking The Lean Angle Sensor - Yamaha YZF-R15 Service Manual

Ignition checker
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
" "
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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 the crank-
shaft position sensor/stator assembly.
Crankshaft position sensor resis-
tance
248–372 Ω at 20 ° C (68 ° F)
s s s s s s s s s s s s s s s s s s s s s s s s s s s s
a. Connect the multimeter to the
position sensor coupler as shown.
Multimeter
• Positive tester probe →
red "1"
• Negative tester probe →
white "2"
b. Measure the crankshaft position sensor re-
sistance.
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CHECKING THE LEAN ANGLE SENSOR

1. Remove:
• Lean angle sensor
2. Check:
• Lean angle sensor output voltage
Out of specification → Replace.
s s s s s s s s s s s s s s s s s s s s s s s s s s s s
a. Connect the lean angle sensor coupler to the
wire harness.
b. Connect the multimeter to the
sensor coupler as shown.
• Positive tester probe →
yellow/green "1"
• Negative tester probe →
crankshaft
black/blue "2"
c. Turn the main switch to "ON".
d. Tilt the lean angle sensor to 65°.
8-68
ELECTRICAL COMPONENTS
R W
1 2
Lean angle sensor output voltage
Less than 65°: 0.4–1.4 V
More than 65°: 3.7–4.4 V
Multimeter
lean angle
L/R