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Home >> Pontiac >> 2004 >> Bonneville V8-4.6L VIN Y >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Engine Control Module >> Description and Operation >> Powertrain Control Module Overall Description
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Powertrain Control Module Overall Description

POWERTRAIN CONTROL MODULE (PCM)

The PCM verifies that the password received from the theft deterrent control module via the Class 2 serial data circuit is correct. The theft deterrent control module can learn only one enable password. If the enable password is correct, the PCM enables the starting and fuel delivery systems.

The PCM disables the starting and fuel delivery systems if any of the following conditions occur:
- The enable password is incorrect.
- The system disable password is sent by the theft deterrent control module.
- No passwords are received - there is no communication with the theft deterrent control module.
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