Yamaha ROADLINER XV19SW, Service Manual

Page: 433 / 444

ELECTRICAL COMPONENTS
7-89
b. Turn the main switch to “ON”.
c. Elevate the rear wheel and slowly rotate it.
d. Measure the voltage of white and black. With
each full rotation of the rear wheel, the volt-
age reading should cycle from 0.6 V to 4.8 V
to 0.6 V to 4.8 V.
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EAS28300
CHECKING THE THROTTLE POSITION
SENSOR
1. Remove:
• Throttle position sensor
(from the throttle body)
2. Check:
• Throttle position sensor maximum resistance
Out of specification
→
Replace the throttle
position sensor.
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a. Connect the pocket tester (
Ω ×
1k) to the
throttle position sensor terminals as shown.
b. Measure the throttle position sensor maxi-
mum resistance.
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3. Install:
• Throttle position sensor
NOTE:
When installing the throttle position sensor, ad-
just its angle properly. Refer to “ADJUSTING
THE THROTTLE POSITION SENSOR” on page
6-12.
EAS28350
CHECKING THE FUEL PUMP
WARNING
EWA13850
Gasoline is extremely flammable and under
certain circumstances there can be a danger
of an explosion or fire. Be extremely careful
and note the following points:
• Stop the engine before refueling.
• Do not smoke, and keep away from open
flames, sparks, or any other source of fire.
• If you do accidentally spill gasoline, wipe it
up immediately with dry rags.
• If gasoline touches the engine when it is
hot, a fire may occur. Therefore, make sure
the engine is completely cool before per-
forming the following test.
1. Disconnect:
• Fuel pump coupler
(from the fuel pump)
2. Check:
• Fuel pump operation
Faulty/rough movement
→
Replace.
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a. Fill the fuel tank.
b. Put the end of the fuel hose “1” into an open
container.
c. Connect the battery (DC 12 V) to the fuel
pump terminals as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
→
white “1”
• Negative tester probe
→
black “2”
Resistance
4.0–6.0 k
Ω
/blue-black
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
→
blue “1”
• Negative tester probe
→
black “2”
B
L L W
B /
W / Y
L
1
2
L Y B
2 1