Powertrain Control Module (PCM)

The PCM verifies that the password received from the VTD (Pass Key III(R)) Module via the Class 2 serial data line is correct. The VTD (Pass Key III(R)) 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 if any of the following conditions occur:
^ The enable password incorrect.
^ The system disable password is sent by the VTD (Pass Key III(R)) Module.
^ No passwords are received - there is no communication with the VTD (Pass Key III(R)) Module.