Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Control Module
The infotainment control module (ICM) acts as a gateway between the CAN and MOST networks. It also acts as the master control module in the MOST network and checks the other control modules.
The infotainment control module (ICM) has an integrated display and keypad unit. There is also a remote control for the infotainment control module (ICM).
The infotainment control module (ICM) controls functions run on the MOST network via its user interface. The command is transmitted from the infotainment control module (ICM) to the other control modules in the network. These implement the requested functions, for example sound playback, changing sound sources and radio settings.
The infotainment control module (ICM) also controls the Infotainment Theft Protection (ITP) function.
The infotainment control module (ICM) is in the center console. The control module is removed from the center console for replacement.
The infotainment control module (ICM) communicates with other control modules via:
- CAN communication
- LIN-communication
- MOST communication.
MOST communication is via a fiber optic communication link.
The control module checks activations and input and output signals via an integrated diagnostic system. A diagnostic trouble code (DTC) is stored if the infotainment control module (ICM) detects a fault.
Any diagnostic trouble codes (DTCs) are stored in the control module memory. This information can be read off using the diagnostic tool via the data link connector (DLC) in the vehicle.
A simple way to check that the infotainment control module (ICM) is supplied with power and is grounded is to check that the display lights up with the ignition on.
For further information, also, see SIGNALS .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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