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matthiaskrueger14

H1 MOST Bus Audio Failure

My 2014 Hyundai H1 with a gasoline engine has a dead audio and navigation system. Diagnostics show a MOST bus error. Could a faulty control unit be the cause? Has anyone else experienced this?

Summary of the thread

A 2014 Hyundai H1 is experiencing a dead audio and navigation system, with diagnostics indicating a MOST bus error. A faulty control unit is suspected as a potential cause. Fiber optic connections related to the MOST bus are sensitive and could also be involved. The recommended solution is to have a professional workshop handle the issue to avoid further complications.

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4 comment(s)

georgmueller35

I had something similar happen in my H1. Everything died: radio, nav, even the parking sensors! Diagnostics also pointed to the MOST bus. Did you check the fiber optic connections? They're sensitive.

matthiaskrueger14 (community.author)

Thanks! Are you referring to the fiber optics related to the MOST bus? Where did you find those connections? Did you fix it yourself or take it to a professional?

georgmueller35

Yeah, the fiber optics on the MOST bus. I gave up after fiddling around. It's a pain to trace and I was worried about damaging the cables. I took it to a workshop. Turns out, a faulty control unit was the problem. Better let pros handle it.

matthiaskrueger14 (community.author)

Appreciate the advice, I will take it to a workshop. My research pointed to a similar conclusion, and since I'm not confident enough to start tearing apart the MOST bus, I will play it safe. Apparently it will be around 1000€.

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HYUNDAI

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H1