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ENGINE CONTROL SYSTEM
COMPONENTS FOR SYSTEM CONTROL ENGINE CONTROL MODULE (ECM) The ECM sends signals to control the actuators based on the information inputs from each sensor/switch. Major controls are as follows: NAME OF CONTROL Fuel injection control Ignition control Idle air control
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VVT system Fuel pump control Multi-stage induction system
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Caution system control
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Self-diagnostic system control Fail-safe system control Total operating hour indication system control Oil changing reminder system control Start-in-gear protection system control Starter motor relay control system O2 feedback system control
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DESCRIPTION Controls fuel injection amount and timing. Controls ignition timing. Controls idling/trolling speed by adjusting intake air amount through IAC valve. Controls intake cam valve timing through OCV (Oil control valve). Controls high pressure fuel pump drive. Changing the length of intake manifold pipes according to engine speed. Informs operator of abnormal engine condition. Controls engine speed. Informs operator of sensor/switch malfunction. Allows operation with back-up system during sensor/switch malfunction. Informs operator of total operating time.
• Informs operator of time for replacing engine oil on the basis of the maintenance schedule. • Prevents engine start when shift is positioned in forward or reverse. • Prevents starter motor operation when engine is already operating. • Controls and performs O2 feedback operation using optional O2 sensor.
NOTE: Information related to the Caution system, Self-Diagnostic System, Total operating hour indication system and O2 feedback system is retained in ECM memory.
ECM
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