Yamaha MTN1000 2016 Service Manual page 621

Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe 
Fuel sender terminal "1"
• Negative tester probe 
Fuel sender terminal "2"
b. Move the fuel sender float to maximum "3"
and minimum "4" level position.
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EAS30938
CHECKING THE FUEL METER/FUEL LEVEL
WARNING LIGHT
This model is equipped with a self-diagnosis de-
vice for the fuel level detection circuit.
1. Check:
• Fuel meter/fuel level warning light "1"
(Turn the main switch to "ON".)
Warning light comes on for a few seconds,
then goes off  Warning light is OK.
Warning light does not come on  Replace
the meter assembly.
Warning light flashes eight times, then goes
off for 3 seconds in a repeated cycle (mal-
function detected in fuel sender)  Replace
the fuel pump assembly.
2
1
3
4
8-204
ELECTRICAL COMPONENTS
EAS30577
CHECKING THE RADIATOR FAN MOTORS
1. Check:
• Radiator fan motor
Faulty/rough movement  Replace.
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a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
• Positive tester probe
blue "1"
• Negative tester probe
black "2"
c. Measure the radiator fan motor movement.
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EAS30578
CHECKING THE COOLANT TEMPERATURE
SENSOR
1. Remove:
• Coolant temperature sensor
Refer to "CYLINDER HEAD" on page 5-23.
EWA14130
WARNING
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature sen-
sor to strong shocks. If the coolant temper-
ature sensor is dropped, replace it.
2. Check:
• Coolant temperature sensor resistance
Out of specification  Replace.
1