1A-4 Engine General Information and Diagnosis:
Engine Control Module (ECM)
Z9J0111101002
The ECM sends signals to control the actuators based on the information inputs from each sensor / switch. Major
controls are as follows:
NOTE
Information related to the Caution System, Self-Diagnostic System, and Total Operating Hours System
is retained in the ECM memory.
Name of Control Description
Fuel injection control • Controls fuel injection amount and timing.
Ignition control • Controls ignition timing.
Idle air control • Controls idling / trolling speed by adjusting the intake air volume
through the IAC valve.
Fuel pump control • Controls the high pressure fuel pump drive.
Caution system control • Informs the operator of abnormal engine conditions.
• Controls engine speed, if activated.
Self-diagnostic system control • Informs the operator of sensor / switch malfunction.
Fail-safe system control • Allows engine operation with a back-up system during sensor /
switch malfunction.
Total operating hour indication system control. • Informs the operator of the total operating time.
Oil changing reminder system control • Informs the operator that it is time to replace the engine oil,
based on the maintenance schedule.
Start-in-gear protection system control • Prevents engine starting when the shift lever is positioned in
forward or reverse.
Starter motor relay control system • Prevents starter motor operation when the engine is already
operating.
Power trim and tilt relay control system • Controls On / Off for the PTT relay’s up and down circuits.
1. ECM
1
I9J011110042-01
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