Checking The Speed Sensor; Checking The Radiator Fan Motor - Yamaha 2009 YZF-R1 (Y) Service Manual

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Green/White "1"
• Negative tester probe
Black "2"
b. Measure the fuel sender resistance.
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EAS28240

CHECKING THE SPEED SENSOR

1. Check:
• Speed sensor output voltage
Out of specification → Replace.
Output voltage reading cycle
0.6 V to 4.8 V to 0.6 V to 4.8 V
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a. Connect the test harness-speed sensor
(3P) "1" to the speed sensor coupler and
wire harness as shown.
b. Connect the pocket tester (DC 20 V) to the
test harness-speed sensor (3P).
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
Test harness-speed sensor (3P)
90890-03208
YU-03208
• Positive tester probe
White/Yellow (wire harness color)
• Negative tester probe
Black/Blue (wire harness color)
ELECTRICAL COMPONENTS
c. Turn the main switch to "ON".
d. Elevate the rear wheel and slowly rotate it.
e. Measure the voltage. With each full rotation
of the rear wheel, the voltage reading
should cycle from 0.6 V to 4.8 V to 0.6 V to
4.8 V.
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EAS28250

CHECKING THE RADIATOR FAN MOTOR

1. Check:
• Radiator fan motor
Faulty/rough movement → Replace.
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a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
• Positive tester probe
Blue or Green "1"
• Negative tester probe
Black "2"
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