1A
Electronic Control System Description
The electronic control system consists of 1) various sensors which detect the state of engine and driving conditions, 2) ECM which controls various devices according to the signals from the sensors and 3) various controlled devices.
Functionally, it is divided into the following sub systems:
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Fuel injection control system
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Ignition control system
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Idle speed control system
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Fuel pump control system
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Evaporative emission control system
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EGR system
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Oxygen sensor heater control system (if equipped)
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A/C control system (if equipped)
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A/C condenser fan control system (if equipped)
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Camshaft position control (VVT) system
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Controller (computer) communication system
Also, with A/T model, ECM sends throttle valve opening signal, ECT signal, engine torque signal and A/C compressor signal to transmission control module to control A/T. Especially, A/T model with camshaft position control (VVT) system, ECM and TCM intercommunicate by CAN (Controller Area Network) communication system.