Section04ENGINEMANAGEMENT(15034-TEC)
Subsection 01 (OVERVIEW)
EMS — ENGINE MANAGEMENT SYSTEM FUNCTIONS
As shown in the 1503 4-TEC CONTROL SYSTEM illustration, the ECM is the central point of the engine
management system. It reads the inputs, makes computations, uses pre-determined parameters and
sends the proper signals to the outputs for proper engine management.
R1503motr220T
1503 4-TEC CONTROL SYSTEM
INPUTS OUTPUTS
Idle bypass valve
Fuel injector
Ignition coil (3)
TOPS valve
Starter solenoid
Fuel pump
Communication
port to VCM
Tip-over protection system (TOPS)
Start/Stop switch
Digitally Encoded
Security System (DESS)
Battery voltage (BV)
Knock sensor (KS)
Throttle position (TPS)
Crankshaft position (CPS)
Coolant temperature (CTS)
Manifold air temperature (MATS)
Manifold air pressure (MAPS)
Oil pressure (OPS)
Oil separator pressure (OSPS)
Camshaft position (CAPS)
ENGINE CONTROL
MODULE (ECM)
Exhaust gas temperature (EGTS)
74 smr2005-011
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