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Home >> Buick >> 2003 >> Century V6-3.1L VIN J >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Description and Operation >> Powertrain Control Module (PCM) Description
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Powertrain Control Module (PCM) Description

POWERTRAIN CONTROL MODULE

The Powertrain Control Module (PCM) communicates with the Body Control Module (BCM) over the Class 2 serial data line. When the BCM enters tamper mode, it sends a Class 2 message to the PCM in order to disable the starting and fuel delivery systems. If the BCM receives a valid coded key, the BCM sends a class 2 message to the PCM in order to enable the starting and fuel delivery systems. The PCM then allows the vehicle to start.
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