Yamaha FZ1-N Service Manual page 436

b. Set the main switch to "ON".
c. Rotate the crankshaft.
d. Measure the voltage (DC 20 V) of White/
Black and Black/Blue. With each full rota-
tion of the crankshaft, the voltage reading
should cycle from 0.8 V to 4.8 V to 0.8 V to
4.8 V.
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EAS28410
CHECKING THE INTAKE AIR PRESSURE
SENSOR
1. Check:
• Intake air pressure sensor output voltage
Out of specification → Replace.
Intake air pressure sensor out-
put voltage
3.75–4.25 V
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a. Connect the pocket tester (DC 20 V) to the
intake air pressure sensor coupler (wire
harness side) as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Pink/White "1"
• Negative tester probe
Black/Blue "2"
b. Set the main switch to "ON".
c. Measure the intake air pressure sensor
output voltage.
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ELECTRICAL COMPONENTS
EAS28420
CHECKING THE INTAKE AIR TEMPERA-
TURE SENSOR
1. Remove:
• Intake air temperature sensor
(from the air filter case.)
EWA14110
WARNING
• Handle the intake air temperature sensor
with special care.
• Never subject the intake air temperature
sensor to strong shocks. If the intake air
temperature sensor is dropped, replace it.
2. Check:
• Intake air temperature sensor resistance
Out of specification → Replace.
Intake air temperature sensor
resistance
2.21–2.69 kΩ at 20°C (68°F)
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a. Connect the pocket tester (Ω × 100) to the
intake air temperature sensor terminal as
shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Brown/White "1"
• Negative tester probe
Black/Blue "2"
b. Measure the intake air temperature sensor
resistance.
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3. Install:
• Intake air temperature sensor
Intake air temperature sensor
bolt
1.2 Nm (0.12 m·kg, 0.87 ft·lb)
8-112