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2005 XC90 2.5T
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Discussion Starter · #1 ·
Hey guys,<p>I posted this in the <A HREF="http://forums.swedespeed.com/zerothread?id=123780" TARGET="_blank">R forum</A> - didn't realize that SWESPE had an actual AUDIO forum. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"> <p>I've been banging my head <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0"> with my 04 HU-803 since the CD player stopped working. I do have the IPOD adaptor with the iMIV , but it would be nice if I could get the CD player working again, especially for the kids music CD's - I don't want to load up my IPOD with Raffi. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"><p>I got a donor unit from a 01 but when I plugged it in, the steering wheel controls and back-lighting won't work. I called my local Volvo stealership and they said they couldn't reprogram my controls or my back-lighting as HU-803's are not reprogrammable.<p>Two questions:<br>1. I have another donor HU-803 unit from another 04-V70R. Shouldn't it be just a plug and play and maybe a VIDA update for the steering wheel controls and back lighting?<p>2. If I took out the CD player from the 01 and put it in my 04 HU-803, should it work?<p>Any help would be appreciated.
 

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Discussion Starter · #2 ·
Re: Need Help: Radio swap issues (forkster)

Bueller? Bueller? Bueller?<p>Anyone? Anyone? Anyone?
 

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Re: Need Help: Radio swap issues (forkster)

I'd like to throw in here, but I really don't know a lot about the P2 systems.<br>Mr Tippy is the MAN, but I think he has a "Gone Fishin' <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/cool.gif" BORDER="0"> " sign up for a few weeks.<br>I know that doesn't help much, but it's all I've got.
 

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Re: Need Help: Radio swap issues (BEJinFbk)

Asolutely right - Mr T is your man. Wait till he hangs up the rods and gets back online.
 

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Re: Need Help: Radio swap issues (forkster)

Yeah, I wonder where MrTippy has been. Very knowledgeable. <p>Assuming the '01 player is the same model (HU-803), yes, you could replace mechanisms. There is the off-case that the actual PCB went bad and would require a more intensive parts-swap, but if your son simply used it as a piggybank from what I recall, then I would be 100% sure it's just the mechanism that needs to be replaced. Too bad I don't live near you, I'd do it for free.
 

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Re: Need Help: Radio swap issues (forkster)

The steering wheel controls and back lighting are not programmed via software. But you do need to have the Audio Unit reloaded via VIDA to get the backlighting and steering wheel controls to work. A dealer will do this for you.<p>"AUM Software Reload" is what you need to ask for.<p>If you search around the Internet, what you are experiencing is the norm for people who go about swapping head units on P2 vehicles...the radio works except for back-lighting and steering wheel controls.<br>
 

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Re: Need Help: Radio swap issues (forkster)

Wow, I never knew I was so popular. Yup, been fishin' in the rain in NW Ontario and I think that I'm almost dried out and can take a stab at this.<p>First, an HU-803 from the same model year should be a drop-in replacement, no software needed. The software download tells the car whether or not to recognize the HU and may have some configuration details.<p>The HU does have some firmware, but, TTBOFK, it is what it is from the factory and cannot be changed. The '01-03 s60/v70 HU-803's should all be the same. '04's had a different color facia and the HU-650/850's are completely backwards incompatible. Within a given model year and the ranges as above, an HU-8XX can be swapped for an HU-6XX. No software download should be needed when swapping oe HU's.<p>An '01 may or may not work in an '04, what is certain is that it will not match your dash color. Someone around here swapped the facia's on a couple of P2 HU's, as I recall, it was a PITA.<p>I've taken my HU-803 apart to fix the internal cd changer (did not photograph the whole process, sorry). It was mostly intuitive and very tedious. I am going to speculate that you can swap one cd changer mechanism for another and very possibly across all HU-803 model years--and maybe even with one from an HU-850, but that would be the stretch. The basic dimensions of all these HU's are nearly identical and nothing much changed about the features (is the HU-850 a 4 or 6 disk changer?).<p>There are others around here whose offspring have banked their HU's, so to speak; some of them managed to get the change out and the HU's continued to work. If it's a goner now, you don't have much to lose by opening up and seeing if you can unjam it. It may not be fatal. Just don't lose any of the little screws on your way.<p>Oh yeah, two more things things. Don't forget to disconnect your battery when you remove an HU if you are disconnecting the CCM (climate control module), too; otherwise you will get an SRS error that will cost $100ish at the dealer to reset.<p>And, if your steering wheel controls do not work, it could be that the microprocessor that they go through crashed. To reset it, you can try disconnecting the battery, grounding the (+) cable to the (-) cable for 15 minutes then reconnecting the battery while the key is in position II, that will force all microprocessors to reboot. My steering wheel controls have died twice since I've owned my v70 and this did the trick both times.
 

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Discussion Starter · #8 ·
Thanks for the great posting! Very informative - thank-you. Some points I want to add:<p>1. I put in the HU-803 from a MY01 - the radio/cd-player worked fine but no steering wheel controls/backlighting. When I plugged back in my original HU, the backlighting AND wheel controls worked again.<p>2. The replacment is from a MY01, and mine is an MY04. I also thought the faceplates might be interchangable, but they are radio-specific/hardcoded.<p>3. After I failed with the swap, I was simply going to take apart both HU's and swap in the MY01 CD player into my MY04 unit.<p>4. I'm using a iMiV from sensolutions - works like a hot-dang. <p>5. apl175 - maybe the 'software reload' is the same as unplugging and replugging the battery?<p>5a. I will try the battery-reset tonight to see if it fixes the issue. I'll post my results tomorrow morning.
 

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Re: (forkster)

If your steering wheel controls work with the original HU, then you probably don't have a microprocessor problem. It could be that the firmware in the older HU will not work with your car. Backwards compatibility is not a given with these things and there is no workaround.<p>Software reload is not the same as disconnecting the battery, waiting & reconnection.
 

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Discussion Starter · #10 ·
Good points MT. I assume then that the "AUM Software Reload" won't resolve it either, especially if it's a firmware issue?
 

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Re: (forkster)

I would not think so and there has not been any, if at all, mention by anybody else running into this kind of problem, i.e. firmware failures. I think that download is for the something like when someone gets a refurbed HU with outdated firmware.<p>If it wasn't so expensive to do, I'd like to see what happens just for the heck of it. Even if you had a dealer friend who'd cut you a break on the shop time, you'd still have to pay the for the sw.
 

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Re: (MrTippy)

Tipper<br>While we're at this discussion, would you know or think <B>would a 300w amp from a 2005 HU850 work on an HU803 (in a 2001)?</B><p>I fried the amp in a car I have 2001, (don't ask), Justin (Chilled Man) is sending me an amp out of a wrecked 05 to at least see if it will work.<br>Any thoughts or am I just wasting my time here?<br>No one at Volvo has a clue whether it will work or not<br><B><br>MODERATORS SHOULD POST THEIR LAST NAMES</B>
 

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Re: (JRL)

Yes, I think it should work just fine. They are all MELBUS HU's and and their aux amps are on a plain analog circuit with DIN connectors. Lots of different part numbers, but they are all essentially the same, just 200W or 300W, and plug n' play.<p>The only difference that I can think of is that the attached bracket might be a little different from a v70 to an s60 to an s80, but you should be able to reuse your old one.<p>These amps are all enclosed and get quite warm under typical conditions and especially when cranked up. A small 12v muffin fan screwed to the topside and powered off the mains would work nicely. A computer hardware supplier or Radio shack should have them. <p>For reference and future readers, the xc90, newer s40's, v70's (and xc) and s80's are all MOST systems with digital amps that are not compatible with the HU-6XX and HU-8XX based systems.
 
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