Powertrain Control Module

The PCM verifies that the password received from the theft deterrent controller (VTD) module via the Class 2 serial data circuit is correct. The VTD 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 VTD module.
^ No passwords are received - there is no communication with the VTD module.