Engine Control System Structure; System Structure 1 - BOMBARDIER Johnson 90 Service Manual

ENGINE CONTROL SYSTEM
ENGINE CONTROL SYSTEM STRUCTURE
ENGINE CONTROL SYSTEM STRUCTURE
90/115 models employ an integrated control system which performs the control functions for fuel injec­
tion, ignition, idle / trolling speed (idle air), etc. through the ECM (Engine Control Module).
System Structure 1
INPUT (sensor/switch) CONTROL (ECM) OUTPUT (actuator etc.)
1
CKP sensor
1
1
Fuel injection control system
1
~1
Fuel injector
1
••
1
1
CMP sensor
1
l
lgnition control system
1
;.. : lgnition coil
1
••
1
1
MAP sensor
1
••
1
ldle air control system
1
:. : IAC valve
1
1
I
IAT sensor
1
-
1
Fuel pump control system
1
;. ¡
High pressure fuel
1
1
-
1
pump
1
Cylinder temp. sensor
1
1
Caution system
1
••
-- .- ¡
Caution buzzer
r
1
1
Exhaust manifold
1
-
1
Self-diagnostic system
1 :_ ¡
Monitor-tachometer
temp. sensor
1
-
1
1
Fail-safe system
1
•..
1
CTP switch
1
1
Starter motor
1
••
1
Start-in-gear protection system
1
-
1
Neutral switch
1
-
1
-
1
0
2
feedback system
1
1
Oil pressure switch
1
-
1
.
1
0
2
sensor (optional)
1
••
[Abbreviations used in this section)
ECM (Engine control module)
CKP (Crankshaft position)
CMP (Camshaft position)
MAP (Manifold absoluta pressure)
IAT (lntake air temperatura)
CTP (Closed throttle position)
IAC (ldle air control)
3-2