Yamaha F350B - ETV Control

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Electronic control system
ETV control
In ETV control, the engine ECM determines the appropriate throttle valve opening according to the sig-
nals from the sensors, and controls the throttle valve.
The engine ECM is equipped with a learning function that records all of the compensations made by
the control to the throttle valve opening for the operating conditions up to that point.
In addition, the engine idle speed is controlled using the ETV control.
9. Engine
ECM
10. ETV motor
5. Engine temperature sensor
2. LPS
3. TPS
1. Pulser coil
6. Thermo sensor (PORT)
8. SPS
7. Thermo sensor (STBD)
4. Intake air pressure/
temperature sensor
1. Pulser coil
2. LPS
3. TPS
4. Intake air pressure/temperature sensor
5. Engine temperature sensor
6. Thermo sensor (PORT)
7. Thermo sensor (STBD)
8. SPS
9. Engine ECM
10. ETV motor