2-5
TECH
FEA
Technical features and description
Electronic fuel injection control
In electronic fuel injection control, the engine ECM determines the fuel injection timing and fuel
injection amount according to the signals from the sensors and performs the appropriate fuel injec-
tion. The fuel injection amount is controlled by the fuel injector actuation time. There are 2 types of
fuel injection timing control: synchronous fuel injection and asynchronous fuel injection. According
to the engine operating conditions during the control, the control mode switches automatically
between the start-up mode, normal operating mode, and fuel injection cutoff mode. In addition, vari-
ous compensations are made to determine the actual fuel injection timing and fuel injection amount.
Also, a fuel injector anti-sticking control has been adopted.
TPS
SPS
LPS
Pulser coil
Cam position sensor
(PORT EX)
Cam position sensor
(PORT IN)
Cam position sensor
(STBD IN)
Air pressure sensor
Air temperature sensor
Engine temperature sensor
Thermoswitch
Engine shut-off switch
Battery
Engine
ECM
Fuel injector
Low-pressure fuel
pump
Vapor shut-off
valve
High-pressure
fuel pump
Summary of Contents for F225F
Page 1: ...SERVICE MANUAL 6CE 28197 3N 11 F L 225F F L 250D F L 300B ...
Page 4: ......
Page 54: ...1 31 SPEC Specification MEMO ...
Page 89: ...2 34 Lower unit 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 263: ...6 28 Canister 0 1 2 3 4 5 6 7 8 9 10 A j k f b ...
Page 477: ...8 98 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 537: ...9 58 PTT cylinder 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 562: ...A 1 MEMO ...
Page 565: ......
Page 566: ...May 2010 1 ABE E_1 YAMAHA MOTOR CO LTD ...
Page 576: ...A 13 ...