Ecu System; Configuration Of Ecu System - TOHATSU MFS 25D Service Manual

Fuel System (Fuel Injection)

4. ECU System

(1) Configuration of ECU System

The ECU uses various sensors to precisely control the injected fuel amount and ignition timing.
1
7
9
8
0
Input
(Sensor/Switch)
Exciter
Power
Supply
coil
Pulser Coil
Engine
(Crank
Speed
Position
Sensor)
Crank
Position
Intake
T-Map Sensor
Air Pressure
Air Temperature
Atomosphere
Pressure
(before starting)
Engine
Engine
Temperature
Temperature
Sensor
Throttle
Throttle
Opening
Positon
Sensor
Oil Pressure
Switch Pressure
4-18
2
3
q
w
Intake
Angle
Oil
4
6
e
r
y
e
Control
(ECU)
ECU
(Engine Control Unit)
Control Ignition Timing,
Fuel Injection Amount,
Control ISC Valve
and Control FFP
Correct
Ignition Timing,
And Fuel Injection
Amount
Control
Warning Lamp,
Buzzer And
ESG Warking
1 Fuel Tank
2 Fuel Regulator
3 Vapor Separator
4 Fuel Feed Pump
(FFP)
5 ECU
6 Ignition Coil
7 Fuel Injector
8 ISC Valve
9 T-MAP Sensor
0 TPS
q Engine Temperature Sensor
w Oil Pressure Switch
5
e Pulser Coil
r ECU charge coil
t Exciter Coil
y Charge Coil
u Rectifier
Regulator
i Battery
*y, u, i: For electric starter
i
t
u
Output
(Actuators)
Power
Supply
models only
Fuel
Feed Pump
(FFP)
Fuel
Injector
Ignition
Coil
Idle
Speed
Control
Valve
Lamp
Buzzer
4st 25/30 2022