Checking The Throttle Position Sensor; Checking The Fuel Pump - Yamaha XT660Z 2008 Service Manual

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.
Resistance
4.0–6.0 kΩ/blue-black/blue
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the pocket tester (Ω x 1k) to the
throttle position sensor terminal as shown.
Pocket tester
90890-03112
• Positive tester probe → blue "1"
• Negative tester probe → black/blue "2"
2
BL
b. Measure the throttle position sensor maxi-
mum resistance.
3. Install:
• Throttle position sensor
NOTE:
When installing the throttle position sensor, ad-
just its angle properly. Refer to "CHECKING
AND ADJUSTING THE THROTTLE POSI-
TION SENSOR" on page 7-9.
EAS28350

CHECKING THE FUEL PUMP

EWA13850
WARNING
Gasoline is extremely flammable and under
certain circumstances there can be a dan-
ger of an explosion or fire. Be extremely
careful and note the following points:
1
Y L
ELECTRICAL COMPONENTS
• 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. Remove:
• Fuel tank
2. Disconnect:
• Fuel pump coupler
• Fuel sender coupler
(from the wire harness)
3. 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 terminal as shown.
• Positive battery lead → red/blue "1"
• Negative battery lead → black "2"
d. Check the fuel pump operation.
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