
FEATURES
1-3
EAS4B51039
FI SYSTEM
The fuel pump delivers fuel to the fuel injector via the fuel filter. The pressure regulator (in the fuel pump)
maintains the fuel pressure that is applied to the fuel injector at 240–260 kPa (2.40–2.60 kg/cm², 34.1–
37.0 psi) higher than the intake manifold pressure. Accordingly, when the energizing signal from the
ECU (engine control unit) energizes the fuel injector, the fuel passage opens, causing the fuel to be
injected into the intake manifold only during the time the passage remains open. Therefore, the longer
the length of time the fuel injector is energized (injection duration), the greater the volume of fuel that is
supplied. Conversely, the shorter the length of time the fuel injector is energized (injection duration), the
lesser the volume of fuel that is supplied.
The injection duration and the injection timing are controlled by the ECU (engine control unit). Signals
that are input from the throttle position sensor, crankshaft position sensor, intake air pressure sensor,
intake air temperature sensor, coolant temperature sensor, and O
2
sensor enable the ECU (engine
control unit) to determine the injection duration. The injection timing is determined through the signals
from the crankshaft position sensor. As a result, the volume of fuel that is required by the engine can
be supplied at all times in accordance with the driving conditions.
Illustration is for reference only.
1. Fuel pump
2. Fuel injector
3. Ignition coil
4. ECU (engine control unit)
5. Catalyst
6. O
2
sensor
7. Coolant temperature sensor
8. Crankshaft position sensor
9. Intake air pressure sensor
10. Throttle body
11. Intake air temperature sensor
12. Air filter case
13. Throttle position sensor
A. Fuel system
B. Air system
C. Control system
Summary of Contents for 2009 XP500Y TMAX
Page 1: ...2009 SERVICE MANUAL XP500Y LIT 11616 22 08 4B5 28197 10 ...
Page 6: ......
Page 8: ......
Page 26: ...SPECIAL TOOLS 1 17 ...
Page 47: ...TIGHTENING TORQUES 2 20 Cylinder head tightening sequence ...
Page 56: ...LUBRICATION SYSTEM DIAGRAMS 2 29 1 2 3 4 4 ...
Page 57: ...LUBRICATION SYSTEM DIAGRAMS 2 30 1 Secondary shaft 2 Drive axle 3 Clutch 4 Crankshaft ...
Page 60: ...COOLING SYSTEM DIAGRAMS 2 33 1 2 3 4 5 6 7 8 9 10 11 12 ...
Page 64: ...CABLE ROUTING 2 37 A B A C D E F G H I J K L 1 2 1 2 3 3 4 5 6 6 7 A A A A A A A A ...
Page 78: ...CABLE ROUTING 2 51 ...
Page 81: ......
Page 115: ......
Page 172: ...FRONT FORK 4 57 2 3 ...
Page 186: ...SWINGARM AND TRANSMISSION CHAIN DRIVE 4 71 ...
Page 270: ...TRANSMISSION 5 81 ...
Page 294: ...THROTTLE BODY 7 9 ...
Page 297: ......
Page 309: ...CHARGING SYSTEM 8 12 2 AC magneto 3 Rectifier regulator 14 Battery 15 Main fuse ...
Page 311: ...CHARGING SYSTEM 8 14 ...
Page 321: ...SIGNALING SYSTEM 8 24 ...
Page 325: ...COOLING SYSTEM 8 28 ...
Page 353: ...FUEL PUMP SYSTEM 8 56 ...
Page 356: ...ELECTRICAL COMPONENTS 8 59 2 1 3 4 5 6 10 8 9 11 7 ...
Page 376: ...ELECTRICAL COMPONENTS 8 79 ...
Page 383: ......
Page 384: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...