Checking The Crankshaft Position Sensor; Checking The Lean Angle Sensor - Yamaha SR400 2014 Service Manual

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EAS28120
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.
Crankshaft position sensor resis-
tance
192–288 
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a. Connect the pocket tester (  100) to the
crankshaft position sensor coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
blue/yellow "1"
• Negative tester probe
green/white "2"
1
b. Measure the crankshaft position sensor re-
sistance.
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EAS28131

CHECKING THE LEAN ANGLE SENSOR

1. Remove:
• Lean angle sensor
(from the fuel pump case box)
2. Check:
• Lean angle sensor output voltage
Out of specification  Replace.
2
7-67
ELECTRICAL COMPONENTS
Lean angle sensor output voltage
Less than 45°
3.6–4.5 V
More than 45°
0.7–1.4 V
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a. Connect the test harness "1" to the lean angle
sensor "2" and wire harness "3" as shown.
b. Connect the pocket tester (DC 20 V) to the
test harness as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Test harness– lean angle sensor
(3P)
90890-03213
Test harness– lean angle sensor
(3P)
YU-03213
• Positive tester probe
yellow/green (wire harness color)
• Negative tester probe
black/blue (wire harness color)
2 1 1
L
45˚
c. Turn the main switch to "ON".
d. Turn the lean angle sensor to 45.
e. Measure the lean angle sensor output volt-
age.
1 3
Y B/L
L
Y/G
B/L
45˚
2