Yamaha FZ1-N Service Manual page 431

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Horn terminal "1"
• Negative tester probe
Horn terminal "2"
c. Measure the horn resistance.
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2. Check:
• Horn sound
Faulty sound → Adjust or replace.
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a. Connect a battery (12 V) to the horn.
b. Turn the adjusting screw in direction "a" or
"b" until the specified horn sound is
obtained.
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EAS28230
CHECKING THE FUEL SENDER
1. Remove:
• Fuel tank
2. Disconnect:
• Fuel pump coupler
• Fuel sender coupler
(from the wire harness)
3. Remove:
• Fuel pump
ELECTRICAL COMPONENTS
(from the fuel tank)
4. Check:
• Fuel sender resistance
Fuel sender resistance
Full position of the float
19–21Ω at 20°C (68°F)
Empty position of the float
139–141 Ω at 20°C (68°F)
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a. Connect the pocket tester (Ω × 10) to the
fuel sender terminal as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Green/white "1"
• Negative tester probe
Black "2"
b. Measure the fuel sender resistance.
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EAS28240
CHECKING THE SPEED SENSOR
1. Check:
• Speed sensor output voltage
Out of specification → Replace.
Output voltage reading cycle
0.6 V to 4.8 V to 0.6 V to 4.8 V
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a. Connect the pocket tester (DC 20 V) to the
speed sensor coupler (wire harness side)
as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
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