Powertrain Control Module
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
The Powertrain Control Module (PCM) provides engine speed data to the audio system. The PCM is part of the Engine Management System (EMS).
For additional information, Refer to: ELECTRONIC ENGINE CONTROLS