Powertrain Control Module

The PCM communicates with the IPC over the Class 2 serial data line. When the IPC enters tamper mode, it sends a Class 2 serial data signal to the PCM in order to disable the fuel injection system. If the IPC receives the expected ignition code, the IPCM sends a class 2 serial data signal to the PCM in order to enable the fuel injection system. The PCM then allows the vehicle to start.