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.
Sound Reproduction
During the transfer of sound signals to the Subwoofer module (SUB) (16/79), the Infotainment control module (ICM) (3/281) allocates a channel on the MOST network. The Audio module (AUD) (16/105) transmits sound signals to Subwoofer module (SUB) via the MOST network.
All filtering and sound treatment of the sound signal occurs in the Audio module (AUD).
Volume control occurs in the Subwoofer module (SUB).
The volume of the subwoofer module (SUB) is raised or lowered using the volume knob on the infotainment control module (ICM). The infotainment control module (ICM) transmits a request on the MOST network to the subwoofer module (SUB), which then processes the request and actively raises or lowers the volume.
The limiter function in the subwoofer module (SUB) does not permit an increase in the output level if this would lead to a reduction in sound quality.
NO RELATED
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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.