Electronic control system
2-4
Electronic fuel injection control
The engine ECM switches the control mode between the start-up mode, normal operating mode, and
fuel injection cutoff mode according to the signals from the sensors. In addition, various compensations
are made to determine the actual fuel injection timing and fuel injection volume. Additionally, when the
engine start switch is turned to ON, the engine ECM opens the injectors once before activating the high-
pressure pump relay to prevent them from sticking.
*1. Sensors used for compensations.
11. Engine
ECM
13. Fuel injector #1, #4
14. Fuel injector #2, #3
12. High-pressure fuel pump
1. Pulser coil
3. Air pressure sensor *1
4. Air temperature sensor *1
5. Thermo sensor *1
8. Engine start switch
9. Engine shut-off switch
10. Battery
6. Oil pressure switch
7. Shift position switch
2. TPS *1
1. Pulser coil
2. TPS *1
3. Air pressure sensor *1
4. Air temperature sensor *1
5. Thermo sensor *1
6. Oil pressure switch
7. Shift position switch
8. Engine start switch
9. Engine shut-off switch
10. Battery
11. Engine ECM
12. High-pressure fuel pump
13. Fuel injector #1, #4
14. Fuel injector #2, #3
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