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Phone not working

Tiny
GANLET
  • MEMBER
  • 2017 VOLKSWAGEN JETTA
  • TURBO
  • AUTOMATIC
  • 30,000 MILES
Hello,
The head unit in my Jetta has suddenly stopped connecting to my iPhone, it just gives a constant connection fails error. In addition whenever I start my car the radio is basically reset, it doesn't remember any saved stations and it starts at the car play screen regardless of where it was when I turned the car off. I have to assume the two issues are related and my theory is that it is probably a fuse, but i'm not sure which fuse it might be. The manual doesn't have a fuse guide. I'm hoping someone can point me in the right direction.

Thanks
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Monday, May 20th, 2019 AT 12:37 PM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
Hello,

It sounds like one of the fuses blew (13, 31 or 51). However, to be sure here is a guide to help us test the fuses and the fuse location with the radio wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Tuesday, May 21st, 2019 AT 3:16 PM
Tiny
GANLET
  • MEMBER
  • 4 POSTS
Thank you for the response, I will try out your suggestion and let you know.
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Wednesday, May 22nd, 2019 AT 9:01 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
Please do.
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Thursday, May 23rd, 2019 AT 11:20 AM
Tiny
GANLET
  • MEMBER
  • 4 POSTS
The guide you provided didn’t match my car exactly. The layout is the same but my car doesn’t have all the fuses listed. I’m not sure if it matters but I have a Jetta SE. In the engine box 13, 31, were missing. In the cabin 13 was missing but 31 and 51 was present and unblown.
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Thursday, May 23rd, 2019 AT 12:02 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
It sounds like the head unit is going out or needs an update. We can find out for sure if we do a CAN system scan. here is a video to help see what needs to be done:

https://youtu.be/InIlnsjOVFA

Please run down this guide and report back.
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Sunday, May 26th, 2019 AT 11:21 AM
Tiny
GANLET
  • MEMBER
  • 4 POSTS
It ended up being the head unit, had to replace it. Thanks for your assistance.
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Friday, June 28th, 2019 AT 7:25 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,356 POSTS
Good to hear, please use 2CarPros anytime we are here to help.
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Saturday, June 29th, 2019 AT 4:36 PM

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