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

ELECTRICAL COMPONENTS
8-140
TIP
Do not use old batteries to operate the throttle
servo motor.
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EAS28370
CHECKING THE AIR INDUCTION SYSTEM
SOLENOID
1. Check:
• Air induction system solenoid resistance
Out of specification → Replace.
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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.
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
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).
A. Check that the throttle valves “2” open.
B. Check that the throttle valves “2” fully
close.
Solenoid resistance
18–22 Ω at 20 °C (68 °F)
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
1
1
3V
2
1
1
3V
2
• Positive tester probe
Orange “1”
• Negative tester probe
Green “2”
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