Checking The Fuel Sender; Checking The Fuel Meter/Fuel Level Warning Indicator; Checking The Radiator Fan Motor - Yamaha TMAX 2020 Service Manual

b. Start the engine and let it run at approxi-
mately 5000 r/min.
c. Measure the rectifier/regulator input volt-
age.
EAS30573

CHECKING THE FUEL SENDER

1. Remove:
• Fuel pump
(from the fuel tank)
Refer to "FUEL TANK" on page 7-1.
2. Check:
• Fuel sender resistance
Out of specification  Replace the fuel
pump.
Sender unit resistance (full)
10.0–14.0 
Sender unit resistance (empty)
267.0–273.0 
a. Connect the digital circuit tester () to the
fuel pump terminals as shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with
tachometer
YU-A1927
• Positive tester probe 
Green "1"
• Negative tester probe 
Black "2"
b. Move the fuel sender float to empty fuel
tank position "3" and full fuel tank position
"4" level position.
ELECTRICAL COMPONENTS
3
c. Measure the fuel sender resistance.
3. Install:
• Fuel pump
Refer to "FUEL TANK" on page 7-1.
EAS31557
CHECKING THE FUEL METER/FUEL LEVEL
WARNING INDICATOR
This model is equipped with a self-diagnosis
device for the fuel level detection circuit.
1. Check:
• Fuel meter/fuel level warning indicator "1"
(Push the ON/start switch.)
Fuel meter/fuel level warning indicator comes
on for a few seconds, then goes off  Fuel
meter/fuel level warning indicator is OK.
Fuel meter/fuel level warning indicator does
not come on  Replace the meter assembly.
Fuel meter/fuel level warning indicator flash-
es eight times, then goes off for 3 seconds in
a repeated cycle (malfunction detected in fuel
sender)  Replace the fuel pump assembly.
1
EAS30577

CHECKING THE RADIATOR FAN MOTOR

1. Check:
• Radiator fan motor
Faulty/rough movement  Replace.
a. Disconnect the radiator fan motor coupler
from the wire harness.
b. Connect the battery (DC 12 V) as shown.
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