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Discussion Starter · #1 ·
<br>We have an '06 S60R with the Ipod adapter. Ignition feedback can be heard clearly. After numerous dealer visits, seen by a factory engineer and the dealer sending it off-site to a car stereo repair firm, no repair. The only thing they have told us is that the interference goes away when one of our other accessories is removed from the bus. This would be the satellite radio, GPS or the Motorola handsfree cell phone unit. Their claim is that no one else has an '06 S60R with all these accessories. They also say that Volvo is working on this in Gothenburg. Does anyone have any suggestions or similar experience?<p>Thanks,<br>Dan
 

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Re: Ipod feedback (Hambone)

A better product: <A HREF="http://forums.swedespeed.com/zerothread?id=32512&page=18" TARGET="_blank">http://forums.swedespeed.com/z...ge=18</A>
 

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are you using the volvo ipod adapter or ipd ?
 

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Re: (phuz)

We have the volvo adapter. <IMG NAME="icon" SRC="http://www.vortexmediagroup.com/images/banghead.gif" BORDER="0">
 

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Re: Ipod feedback (Hambone)

This is an interesting problem. Let me explain what I know of this. Maybe this helps you in understanding and isolating the problem.<p>Accessories that connect to the HU (HeadUnit), like RTI, CD-C, etc. use the Melbus. This is a proprietary communication bus that carries control signals and audio signals. Physical, it's a cable with 8-pin round DIN connectors, starting at the HU.<br>In your case, the RTI, sat radio and iPod adapter are connected to the Melbus. The Bluetooth device, however, is not, to my knowledge. As far as I know it only mutes the HU and puts an audio signal directly on the car speakers.<p>On the Melbus, the devices are daisy chained. Each device has the possibility to wire-through the Melbus to the next device. Usually a 8pin DIN connector is used for the connection towards the HU and a 13pin DIN connector is used to wire-through to the next device.<br>Your "chain" should look like this ([...] - means cable).<p>HU -> [8pinDIN/8pinDIN] -> RTI -> [13pinDIN/8pinDIN] -> sat radio -> [13pinDIN/8pinDIN] -> iPod adapter.<p>The sat radio and iPod adapter are located near (or on top of) the RTI in the trunk. The sat radio does have a wire-through connector, but the iPod adapter doesn't. That's why it's always last in the chain.<p>Ignition feedback is almost always a case of a ground loop problem. This can be solved in two ways: <br>1) use proper grounding and the same grounding point for all devices (star grounding) <br>2) ground loop isolator for the audio signals.<br>Interesting is that the iPod adapter has on-board ground loop isolators for audio. So, it's very unlikely that the iPod adapter itself causes the ground loop. Rewiring all the grounds of the devices is pretty tricky, since wire harnesses are used for the devices and it would mean to splice into all the ground wires.<p>To my knowledge the iPod adapter works without interference when it is connected to the RTI directly (without the sat radio in between). I suspect there may be two causes: <br>1) sat radio causes the ground loop (especially the wire-through connection)<br>2) Bluetooth kit causes interference.<p>Try connecting the iPod adapter to the RTI directly without the sat radio in between and see if your problems disappear. Disconnect the 8pin DIN that inserts into the sat radio and rewire it to the iPod adapter. <br>If the problems are gone, then the sat radio is your problem. Re-grounding the sat radio may solve the issue. Choose a ground point that's the same as the HU's ground point. <br>If the problems don't disappear then the Bluetooth kit may be the problem (I find this somewhat unlikely, but not impossible). However, the interference should be there when listening to sat radio too. And even when listening to normal radio.<p>Worst case is that the sat radio has some engineering error and the wire-through connector always causes interference. Only thing left then is to make a custom Melbus wire-through cable, so the iPod adapter can be inserted directly after the RTI. USASpec has such a Y-cable for their adapter so it can be used with the RTI, but these had wiring problems in the past. I don't know the current status of these issues. If they are solved you could maybe purchase one of those.<p><br>Hope this helps.<p><br>Edwin.<br>
 

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Re: Ipod feedback (Hambone)

I have the Volvo iPod adapter, was installed at delivery. It was mounted behind the NAV DVD unit in the rear hatch area of our V70R. There was no interference. <p>Have they tried swapping your iPod adapter or Bluetooth with another unit to see if that eliminates the problem? <p>There response is extremely weak as I'm sure Hans and the other audio engineers in Sweden would have engineered all of the OEM accessories to work properly.<p>
 

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Re: Ipod feedback (Hambone)

I have an '04 S60R with all the same accessories as you do except for the Satellite radio. I also have the Volvo Nav system (is that same as you posted as GPS?). My Volvo Hands Free BT car kit was installed this past week by Volvo after they removed my defunct VOCP SOS hardware.<p>I installed the Volvo iPod adapter myself some time ago and left the iPod device in the trunk's left cubbyhole space near to the DVD player unit. I grounded the iPod adapter hw to the same ground used by the battery as it was so much easier than routing the ground wire to underneath the rear passenger seat as directed by Volvo's iPod adapter installation instructions.<p>With this setup I have no ignition feedback whatsoever - the iPod music is crystal clear.<p>I know this doesn't answer you questions or resolve your problem - but wanted to post my setup and experiences to maybe give you some support. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"><p>Good luck.
 

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Re: Ipod feedback (mrg_Ed)

<br>I read another interesting statement on the same problem here: <A HREF="http://forums.swedespeed.com/zerothread?id=64409" TARGET="_blank">http://forums.swedespeed.com/zerothread?id=64409</A><p>quote:<br>"FYI - my V70R has been at the local dealer all week trying to eliminate an alternator noise (whine) problem that started when I added the Volvo iPod adapter to my car which already had factory Nav and Sirius. I know this combination has been a problem. They have spent a considerable amount of time on it, along with a factory tech, and have not succeeded. Right now the Sirius module has been bypassed so I can listen to my iPod w/out the noise until they solve the problem."<p><br>The Sirius unit does seem to be a problem. You should try the Melbus y-cable, really.<p>
 

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Re: Ipod feedback (Hambone)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Hambone</b> »</i></TD></TR><TR><TD CLASS="quote"><br>We have an '06 S60R with the Ipod adapter. Ignition feedback can be heard clearly. Dan</TD></TR></TABLE><p>Is this really "ignition feedback" as you state in your post? Ignition noise is a popping, clicking, somewhat random noise, that will no doubt be at it's worst while listening to a weak AM radio broadcast.<p>If it is alternator whine, which has been suggested here, it is a whine, whose frequency increases directly with engine RPM. <p>To my knowledge, Volvo and it's resources, have not been able to resolve the alternator whine experienced by those who have multiple audio devices as you describe. There is also an issue on those systems that have the Digital JukeBox. in combination with Nav., SAT Radio, iPOD, etc. <p>It will take someone that has the knowledge and motivation to isolate the issue. I believe in the few known cases that Volvo has given up and refunded the buyer of the accessories. <br>
 

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Re: Ipod feedback (Hambone)

I have an '05 V70R with Nav, Sirius, and factory iPod adapter, and had the severe ignition whine. After repeated rapair attempts by the dealer and factory techs, they finally solved the problem by apparently adding some kind of aftermarket electronic insulators to each of the devices. <p>This was solved only within the last couple of weeks so it may or may not be an officially approved solution yet. All I know is I am a happy camper. <p>Try asking the dealer to check with the factory again. Maybe they're starting to spread the word.<p><br>
 

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Re: Ipod feedback (rogersampson)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>rogersampson</b> »</i></TD></TR><TR><TD CLASS="quote">Is this really "ignition feedback" as you state in your post? Ignition noise is a popping, clicking, somewhat random noise, that will no doubt be at it's worst while listening to a weak AM radio broadcast.</TD></TR></TABLE><p>The problem that I had with interference on the audio when I added a Phatnoise Phatbox was a combination of alternator noise and injector noise (my S80 is a diesel). <p>It is perfectly possible for these noises (as well as ignition noise) to break into the audio feed without appearing on an AM broadcast since the transmission mechanisms are different. On AM radio, the noise is literally transmitted from the ignition system. The type of noise picked up by various Ipod and similar adaptors is more commonly caused by small variations in the ground voltage at different points in the vehicle which then get superimposed on the audio signal. This is why "star grounding" as suggested is often an effective cure. The ground variations are caused by the high current pulses that car electrics can generate. Grounding to a common point should eliminate these differences.<p>Star grounding is very commonly used in good audio equipment, but in a vehicle with several sytems in different locations it can be difficult to implement it effectively, which is why isolation transformers are sometimes used.
 

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Re: Ipod feedback (S80_UK)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>S80_UK</b> »</i></TD></TR><TR><TD CLASS="quote">This is why "star grounding" as suggested is often an effective cure. The ground variations are caused by the high current pulses that car electrics can generate. Grounding to a common point should eliminate these differences.<p>Star grounding is very commonly used in good audio equipment, but in a vehicle with several sytems in different locations it can be difficult to implement it effectively, which is why isolation transformers are sometimes used.</TD></TR></TABLE><p><IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0"><p>Which is why Volvo grounds the 10-cd changer, for example, under the rear passenger seat (V70) with 2 or 3 others instead of next to the changer or the REM.
 

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Re: Ipod feedback (JHB)

I don't have NAV or Sirius and my Volvo iPod adapter whine is pretty bad. When I hit the gas it gets worse. The only time I don't hear it is when I turn up the volume. Has anyone heard of this when none of the other devices are installed?<p>Ken
 

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Re: Ipod feedback (LAWLESS)

Not unrealistic. Get it back to the installer and tell them to do it right. Probably the ground needs to be moved.
 

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Re: Ipod feedback (LAWLESS)

<br>Since the Volvo iPod adapter has onboard ground loop isolators, it probably is not a grounding issue (ground loop situation).<p>Have the Melbus cable replaced first, but if that doesn't help, grounding to a different location may.<p>
 
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