Sunfire L4-2.2L VIN F (2002)
Engine Control Module: Description and Operation
Electronic Ignition (EI) System Description
The PCM controls all ignition system functions, and constantly corrects the spark timing. The PCM monitors information from various sensor inputs that
include the following:
^
The Throttle Position (TP) sensor
^
The Engine Coolant Temperature (ECT) sensor
^
The Mass Air Flow (MAF) sensor
^
The Intake Air Temperature (IAT) sensor
^
The Vehicle Speed Sensor (VSS)
^
The transmission gear position or range information sensors
^
The engine Knock Sensors (KS)
