Ecm (Electric Control Module) - Yamaha F50F Service Manual

ECM (Electric Control Module)

This engine is controlled by the ECM to obtain precision combustion under various operations, and
can realize high power output, low fuel consumption, and low emission.
The ECM controls the ignition timing, fuel injection timing, and the fuel injection volume, and
ensures that the optimum ignition timing and air and fuel ratio can be achieved in all operating con-
ditions such as engine starting, normal operation, and quick acceleration.
The self-diagnosis function is incorporated into the ECM and can be easily found a malfunction
point by a personal computer with the optional software installed.
INPUT
Flywheel
Rectifier Regulator
magnet
6C13G11
40
Pulser coil
16
Power source for sensors
36
Throttle position
sensor
17
Intake air pressure
sensor
46
Cooling water pressure sensor
31
Ground for sensors
38
Intake air temperature sensor
48
Cooling water temperature sensor
34
Shift position switch
27
Engine stop lanyard switch
10
Oil pressure switch
28
Variable trolling RPM switch (UP)
29
Variable trolling RPM switch
(DOWN)
14
Ground for ECM
5
Ground
15
Battery (+)
Main relay
– +
Engine start switch
Battery
Features and benefits
OUTPUT
3
Fuel injectors #1, #4
4
Fuel injectors #2, #3
18
Ignition coil #1, #4
1
Ignition coil #2, #3
23
Idle speed control (S1)
6
Idle speed control (S2)
20
Idle speed control (S3)
21
Idle speed control (S4)
Main relay
7
Tachometer
26
Oil pressure warning
indicator
8
Overheat warning
indicator
25
Check engine warning
indicator
9
Buzzer/DES switch
DES switch
11
Solenoid valve
24
Fuel pump relay
Relay
45
Power for diagnosis lamp
13
Diagnosis
T
BZ
P
S6C11160
1-10
1
2
3
4
5
6
7
8
9