Yamaha FZ1-N Service Manual page 435

Air induction system solenoid
resistance
18–22 Ω at 20°C (68°F)
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a. Remove the Air induction system solenoid
coupler from the wire harness.
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
• Positive tester probe
Brown "1"
• Negative tester probe
Brown/Red "2"
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.
Atmospheric pressure sensor
output voltage
3.75–4.25 V
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a. Connect the pocket tester (DC 20 V) to the
atmospheric pressure sensor coupler (wire
harness side) as shown.
ELECTRICAL COMPONENTS
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Pink "1"
• Negative tester probe
Black/Blue "2"
b. Set the main switch to "ON".
c. Measure the atmospheric pressure sensor
output voltage.
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EAS28390
CHECKING THE CYLINDER IDENTIFICA-
TION SENSOR
1. Check:
• Cylinder identification sensor output volt-
age
Out of specification → Replace.
Cylinder identification sensor
output voltage
When sensor is on
4.8 V or more
When sensor is off
0.8 V or less
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a. Connect the pocket tester (DC 20 V) to the
cylinder identification sensor coupler (wire
harness side) as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
White/Black "1"
• Negative tester probe
Black/Blue "2"
8-111