Yamaha YZF-R1 Series Service Manual page 484

3
1
d. Heat the coolant or let it cool down to the
specified temperatures.
e. Measure the coolant temperature sensor
resistance.
3. Install:
• Coolant temperature sensor
Coolant temperature sensor
16 N·m (1.6 kgf·m, 12 lb·ft)
EAS30592
CHECKING THE THROTTLE SERVO MOTOR
1. Remove:
• Air filter case
Refer to "AIR FILTER CASE" on page 7-5.
2. Check:
• Throttle valve operation
Throttle valves do not fully close → Replace
the throttle bodies.
a. Connect two C-size batteries to the throttle
servo motor terminals "1" as shown.
ECA17660
NOTICE
Do not use a 12 V battery to operate the throt-
tle servo motor.
TIP
Do not use old batteries to operate the throttle
servo motor.
2
ELECTRICAL COMPONENTS
1
1
3 V
1
1
3 V
A. Check that the throttle valves "2" open.
B. Check that the throttle valves "2" fully close.
EAS30587
CHECKING THE AIR INDUCTION SYSTEM
SOLENOID
1. Check:
• Air induction system solenoid resistance
Out of specification → Replace.
Solenoid resistance
18–22 Ω
a. Remove the air induction system solenoid
coupler from the air induction system sole-
noid.
b. Connect the digital circuit tester (Ω) to the
air induction system solenoid terminal as
shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
orange "1"
• Negative tester probe
green "2"
8-49
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