Powertrain Control Module (PCM)/Engine Control Module (ECM)

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

The PCM/ECM 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.