Checking The Radiator Fan Motors; Checking The Coolant Temperature Sensor; Checking The Throttle Position Sensor - Yamaha YZFR6X(C) 2008 Service Manual

EAS28250

CHECKING THE RADIATOR FAN MOTORS

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 "1"
• Negative tester probe →
black "2"
c. Measure the radiator fan motor movement.
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EAS28260
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
Refer to "THERMOSTAT" on page 6-6.
EWA14130
WARNING
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification → Replace.
Resistance at 80 °C
290–354 Ω
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a. Connect the pocket tester (Ω × 100) to the
coolant temperature sensor as shown.
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
b. Immerse the coolant temperature sensor
"1" in a container filled with coolant "2".
NOTE:
Make sure the coolant temperature sensor ter-
minals do not get wet.
c. Place a thermometer "3" in the coolant.
d. Slowly heat the coolant, then let it cool
down to the specified temperature.
e. Measure the coolant temperature sensor
resistance.
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EAS28300
CHECKING THE THROTTLE POSITION
SENSOR (FOR THROTTLE VALVES)
1. Remove:
• Throttle position sensor (for throttle
valves)
(from the throttle body)
2. Check:
• Throttle position sensor (for throttle
valves) maximum resistance
Out of specification → Replace the throt-
tle position sensor (for throttle valves).
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