Engine Control Module (Ecm) - BOMBARDIER Johnson 90 Service Manual

ENGINE CONTROL SYSTEM
COMPONENTS FOR SYSTEM CONTROL
COMPONENTS FOR SYSTEM CONTROL
Engine Control Module (ECM)
The ECM sends signals to control the actuators basad on the information inputs from each sensor /
switch. Majar controls are as follows:
NAME OF CONTROL DESCRIPTION
Fuel injection control • Controls fuel injection amount and timing.
lgnition control • Controls ignition timing.
ldle air control • Controls idlíng / trolling speed by adjusting intake air amount through
IAC valve.
Fuel pump control • Controls high pressure fuel pump drive.
Caution system control • lnforms operator of abnormal engine condition.
• Controls englne speed.
Self·diagnostic system control • lnforms operator of sensor/ switch malfunction.
Fail-safe system control • Allows operation during sensor/ switch malfunction.
Start-in-gear protection system
• Prevents engine start when shift is positioned in forward or reverse.
control
0
2
feedback system control • Controls and performs 0
2
feedback operation using optional 0
2
sensor.
NOTE:
lnformation related to the Caution system, Self-diagnostic system, and 0
2
feedback system are retained
in ECM memory.
3-4