ENGINE CONTROL SYSTEM 3-5
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 DESCRIPTION
Fuel injection control
NOTE:
The information related to the Caution system, Self-Diagnostic system, Operating hour indication system,
Oil change reminder system and O
2
feedback system are retained in the ECM memory.
Controls fuel injection amount and timing.
Ignition control Controls ignition timing.
Idle air control
Controls idling/trolling speed by adjusting intake air amount through IAC valve.
Fuel pump control Controls high pressure fuel pump drive.
Caution system control
Informs operator of abnormal engine condition.
Controls engine speed.
Self-diagnostic system
control
Informs operator of sensor/switch malfunction.
Fail-safe system control Allows operation during sensor/switch malfunction.
Operating hour indication
system control
Informs operator of total operating time.
Start-in-gear protection
system control
Prevents engine start when shift is positioned in forward or reverse.
O
2
feedback system
control
Controls and performs O
2
feedback operation using optional O
2
sensor.
Oil change reminder system
control
Informs operator of required engine oil replacement interval based on
maintenance schedule.
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