Powertrain Control Module

Powertrain Control Module (PCM) communicates with Instrument Panel Cluster (IPC) over class 2 serial data line. When IPC enters tamper mode, it sends a class 2 serial data signal to PCM in order to disable fuel injection system. If IPC receives expected ignition code, IPC sends a class 2 serial data signal to PCM in order to enable fuel injection system. PCM then allows vehicle to start.