Checking The Air Induction System Solenoid; Checking The Atmospheric Pressure Sensor - Yamaha 2009 YZF-R1 (Y) Service Manual

TIP
Do not use old batteries to operate the throttle
servo motor.
A. Check that the throttle valves "2" open.
B. Check that the throttle valves "2" fully
close.
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EAS28370
CHECKING THE AIR INDUCTION SYSTEM
SOLENOID
1. Check:
• Air induction system solenoid resistance
Out of specification → Replace.
Solenoid resistance
18–22 Ω at 20 °C (68 °F)
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a. Disconnect the air induction system sole-
noid coupler from the air induction system
solenoid.
b. Connect the pocket tester (Ω × 1) to the air
induction system solenoid terminal as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1
1
2
1
1
2
ELECTRICAL COMPONENTS
• Positive tester probe
Orange "1"
• Negative tester probe
Green "2"
3V
c. Measure the air induction system solenoid
resistance.
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EAS28380
CHECKING THE ATMOSPHERIC PRES-
SURE SENSOR
1. Check:
• Atmospheric pressure sensor output volt-
age
3V Out of specification → Replace.
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a. Connect the test harness S-pressure sen-
sor (3P) "1" to the atmospheric pressure
sensor and wire harness as shown.
ECA14B1035
Pay attention to the installing direction of
the test harness S-pressure sensor (3P)
coupler "a".
b. Connect the digital circuit tester (DCV) to
the test harness S-pressure sensor (3P).
8-140
Atmospheric pressure sensor
output voltage
3.57–3.71 V at 101.32 kPa
Digital circuit tester
90890-03174
Model 88 Multimeter with
tachometer
YU-A1927
Test harness S-pressure sensor
(3P)
90890-03207
YU-03207