DeVille V8-4.6L VIN Y (1998)
Powertrain Control Module: Description and Operation
Powertrain
Description
The powertrain used in this vehicle consists of a dual overhead cam engine mated to an electronically controlled transaxle. It has controls to reduce
exhaust emissions while maintaining excellent driveability and fuel economy. The Powertrain Control Module (PCM) is the heart of this control system.
Operation
The Powertrain Control Module is designed to maintain exhaust emission levels to Federal or California standards while providing excellent driveability
and fuel efficiency. Review the components and wiring diagrams in order to determine which systems are controlled by the PCM. The PCM monitors
numerous engine and vehicle functions. The PCM controls the following operations:
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Fuel control
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Ignition Control (IC)
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Knock Sensor (KS) system
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Automatic transmission shift functions
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Cruise Control Enable
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Evaporative Emission (EVAP) Purge
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A/C Clutch Control
^
Cooling Fan Control