Powertrain Control Module (PCM)

The PCM verifies that the password received from the theft deterrent controller module via the Class 2 serial data line is correct. The theft deterrent controller module can learn only one enable password. If the enable password is correct, the PCM enables the fuel system and engine starting system.

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