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WTF is up with my Radio

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2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
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sixspence
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WTF is up with my Radio

Post by sixspence »

Pardon the French, but I've been having issues with the HU-650 in my '07 XC-70.
For a while it would be playing fine and then would randomly start cycling through the functions ... CD, FM, AM, AUX... etc. and then just stop on one. Kinda like roulette or something.
Now it just stopped making sounds altogether. It appears to be working in every way, but no noise comes out of the speakers. The reverse alert beeping sound stopped too.
I already purchased a used replacement radio, but don't want to dig in to that project and then find out that it wasn't the radio after all.
Any suggestions on what the problem could be or what to do would be appreciated.
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MoVolvos
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Re: WTF is up with my Radio

Post by MoVolvos »

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No system before or after that should make head-unit go psycho.
Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
DrDan
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Re: WTF is up with my Radio

Post by DrDan »

The fault of two seemingly unrelated functions kind of points to failure of the PCB (bad soldering joints?). Hard to trace and fix unless you're an expert, so swapping the head unit seems a reasonable strategy. Beware that you need a unit from the same model year if you want more than basic functionality. Steering wheel controls, "reverse beep", dimming of the backlight and more are implemented using the CAN bus and apparently they changed the protocol between model years. There's more info on head unit compatibility somewhere in the depths of this forum.
DrDan
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Re: WTF is up with my Radio

Post by DrDan »

Also an important bit: disconnect the battery before removing the radio. If you don't, an SRS code will be triggered. Set ignition to II before reconnecting.
sixspence
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Re: WTF is up with my Radio

Post by sixspence »

Followup...
I replaced my HU-650 with another that I purchased off ebay.
The radio now works. HOWEVER... my Reverse Sensors are not. That may be an entirely separate issue, but it is VERY suspicious that the sensors stopped working at the same time my radio stopped working. It is throwing a message that the Reverse Sensors need attention.
Also... There is NO AUX on the new radio!
I used the AUX function all the time and now it doesn't exist. It may be possible that the HU-650 I installed is an older model than the original. Is there a way to enable/disable the AUX function?
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MoVolvos
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Re: WTF is up with my Radio

Post by MoVolvos »

sixspence wrote: Tue Jul 30, 2019 3:21 pm Followup...
Also... There is NO AUX on the new radio!
I used the AUX function all the time and now it doesn't exist. It may be possible that the HU-650 I installed is an older model than the original. Is there a way to enable/disable the AUX function?
Where was the AUX originally? A quick look shows no AUX front or back on the HU-650.
https://duckduckgo.com/?q=hu-650+audio+ ... efault.jpg

Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
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MoVolvos
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Re: WTF is up with my Radio

Post by MoVolvos »

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"The AUX input is located inside of the center console..."
http://www.volvoxc.com/forums/showthrea ... -in-HU-650
Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
sixspence
Posts: 10
Joined: Wed Jul 17, 2019 9:52 pm
Year and Model: 2007 XC70
Location: Minnesota
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Re: WTF is up with my Radio

Post by sixspence »

Maybe I wasn't clear...
On my old HU-650, there was an AUX source input, along with FM1, FM2, FM3, CD, Serius XM, etc...
On my new (used) HU-650, AUX does not show up with all the other Sources.
I reinstalled all the harnesses and cables into the identical slots that they came from. I'm not sure which one was the AUX cable, but it shouldn't matter.
I'm wondering if there is a way to enable the AUX source on the newly installed head unit.
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MoVolvos
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Re: WTF is up with my Radio

Post by MoVolvos »

-
My understanding of an AUX input meant
1) It's a built in feature so it appears in the display along with FM1, FM2 etc.
2) In order to connect to an AUX source there is either a hole for the AUX source to plug into in the face plate of the HU or another wire/plug you can connect to with your AUX source coming from the dash.

As for getting the feature in a HU-650 there is a hack but I think many of us myself included probably can't hack it.
https://gizmosnack.blogspot.com/2015/11 ... radio.html
Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
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MoVolvos
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Re: WTF is up with my Radio

Post by MoVolvos »

Blessings,

BKM

1998 S70 T5 - Donated
2003 S80 T6
2003 GS300
2003 Odyssey
2008 C30 T5
2019 Atlas SE 4 Motion
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