7
(3) Ingition control sensor
IGNITION
COIL 1
IGNITION
COIL 2
IGNITION
COIL 3
Configuration of Engine Control System
The engine control system consists of the following sub–systems.
Intake air system
This system supplies the air necessary for combustion. The air filtered by the air cleaner flows through the throttle body
into the surge tank. Then it is distributed in the intake manifold and drawn into each combustion chamber. This system
also includes the air regulator which controls the first idle speed and the ISC solenoid valve which controls the idle
speed.
Ignition system
This system consists of ignition coils and ignition plug. It emits sparks to the ignition plug according to the ignition signal.
Also, it sends the ignition check signal from the primary circuit of the ignition coil to ECM.
Control system
This system consists of the signal system (including sensors and switches), ECM, actuator system (including an
injecter, ISC solenoid valve and igniter) and power source to control fuel injection, idle speed and ignition timing.
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