The PCM communicates with all engine sensors and the other modules. Communication of the PCM with the other modules and the system diagnostics takes place via the CAN (controller area network) data bus.
The following functions are regulated or controlled by the PCM:
If the PCM is isolated from the vehicle electrical system or the battery is disconnected, the throttle control unit must be initialized.
The PCM is fitted in the engine compartment in the air filter housing. On right hand drive vehicles a protective metal plate is also installed to prevent the plug connector from being pulled off, or make it harder to pull off, in case of theft. The protective plate is secured with a shear bolt. The shear bolt needs to be drilled out in order to remove the protective plate.