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:
Information related to the Caution system, Self-diagnostic system, Total operating hour indication system, Oil
change reminder system and O
2
feedback system are retained in 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 the required engine oil replacement intervals based
on the maintenance schedule.
ECMECM
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