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5. Ignition System
For ignition system, CD ignition system is adopted, and ECU's electronic ignition timing control system controls the
timing to the most suitable state according to current operating conditions.
As engine is started, electric current is generated in the exciter coil of alternator. Which is input to ECU's regulator to
feed power needed for operations of ignition coil, fuel injector and fuel feed pump (FFP).
1
7
9
8
0
(1) Configuration of Ignition System
The ignition system consists of mainly the following components.
(1) Sensors and switches that transmit the engine operating status to the ECU
(2) ECU to perform electronic control
(3) Ignition coils and spark plugs that operate in accordance with the controls determined by the ECU
The following 6 components are included in the sensors and switches in (1).
• Pulser coil
• Throttle Position Sensor (TPS)
• Engine Temperature Sensor
• T-MAP Sensor
• Oil Pressure Switch
4st 25/30 2022
2
4
3
6
q
e
w
y
e
Crank position [Crank Position Sensor]
Throttle opening angle
Temperature of Cooling Water (Crankcase)
Intake air vacuum pressure and temperature
Reduction of hydraulic pressure
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
5
q Engine Temperature Sensor
w Oil Pressure Switch
e Pulser Coil
r ECU charge coil
t Exciter Coil
y Charge Coil
u Rectifier
Regulator
i Battery
*y, u, i: For electric starter
r
i
t
u
4
models only
4-25
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