Checking The Intake Air Temperature Sensor; Checking The Intake Air Pressure Sensor - Yamaha F30B 2018 Service Manual

g. Start the engine, and then measure the
peak voltage at the specified engine
speed.
a
a
W/R
W/R
B B
h. Stop the engine.
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2. Measure:
• Pulser coil resistance
Out of specification  Replace.
Resistance
152.0–228.0 
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a. Disconnect the pulser coil connectors.
b. Measure the pulser coil resistance.
c. Connect the pulser coil connectors.
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Checking the intake air temperature
sensor
The intake air temperature sensor is a compo-
nent of the throttle body which cannot be disas-
sembled.
1. Check:
• Intake air temperature sensor operation
Not operating  Check the wire harness
for continuity.
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a. Measure the ambient temperature.
b. Connect the YDIS to display "Intake air
temperature".
c. Check that the difference between the am-
bient temperature and the displayed intake
air temperature is within  5 C ( 9 F).
TIP:
• Check the intake air temperature sensor
when the engine is cold.
• When checking the intake air temperature
sensor, remove the top cowling and do not
start the engine.
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Checking the intake air pressure sen-
sor
The intake air pressure sensor is a component
of the throttle body which cannot be disassem-
bled.
1. Measure:
• Intake air pressure sensor input voltage
Out of specification  Check the wire har-
ness for continuity.
Input voltage
5 V
Orange (Or)–Black (B)
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a. Disconnect the throttle body coupler "a".
b. Turn the engine start switch to ON, and
then measure the input voltage at the
throttle body coupler.
a
c. Turn the engine start switch to OFF.
d. Connect the throttle body coupler.
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5-31
Ignition unit and component
Or B