Fuel Injection System; Ecu Fuel Feed System - TOHATSU MFS 25D Service Manual

2. Fuel Injection System

1) ECU Fuel Feed System

The ECU uses various sensors to precisely control the injected fuel amount (time) and ignition timing.
Alternator
(Exciter Coil)
Pulser Coil
(Crank Position Sensor)
MAP(Intake pressure)
Sensor
MAT(Intake air
temperature)Sensor
Engine Temperature Sensor
Throttle Position Sensor
(TPS)
Oil Pressure Switch
Stop Switch
0
1
2
Except for
MF, EF model
2
MF, EF model
Fuel
① Fuel Tank
⑤ Vapor Separator
⑦ Fuel Regulator
4st 25/30 2022
Electric
Control
Unit
(ECU)
3
4
Air
② Fuel Connector
⑥ Fuel Feed Pump (FFP)
Fuel Cooler
⑩ Vapor Catch Tank
Fuel
Control
Idle
Air Control
Ignition
Timing
Control
Display
Control
q
7
6
5
③ Fuel Filter
④ Fuel Pump
⑧ Fuel Rail
⑨ Fuel Injector
⑪ Vent hose nipple
Fuel Feed Pump
(FFP)
Fuel Injector
ISC
(Idle Speed Control Valve)
Ignition Coil
Warning Buzzer
Warning Lamp
(LED)
Tachometer
9
8
Intake Manifold
Open to Air
2-9
2