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I recently came to own a 2004 cayenne turbo.

My navigation system in it does not work.

It did not have region 2 (west) nav CDs but I now have one.

When I put this in the single-cd slot, the nav system says unable to read the disc.

I took it to Steven's Creek Porsche, and using the porsche service compouter they show a fault reading from the single cd. While I generally trust and respect them, they seemed a little assumptive about the issue. The tech initially told me I was putting the CDROM in the wrong place (center dash) but then realized my model doesn't have the under-passenger-seat dvd/cdrom. Later when he checked the computer, he saw the fault and said it must be a broken cd reader. He cleared the error and then we had the same problem. May be that simple, but something about his approach to the issue was not convincing to me.

They suggested the PCM unit's CDROM reader is broken and needs to be replaced for roughly $4k.

My questions for you: (if you can answer even just one or suggest input I would very much appreciate it)

1. Is this a known issue that frequently happens? Is there any way to fix it such as blown air, some sort of cleaner, or swap the CD reader itself instead of the whole unit?

2. If no ideas on #1 - Can you suggest from where I might acquire a used PCM unit? I did investigate installing an after market system, and the vendor with whom I spoke said he could sell me a used PCM system for $2k installed

3. Will any after-market navigation systems display on the instrument cluster? I was this close to junking the existing PCM as navigation is very important to me - but then I realized any after market system will not display in the instrument cluster. On the off chance my assumptions are incorrecct I ask this question.

4. What after market head unit/navigation systems are well regarded for the 2004 cayenne by you all? I would like to have nav, bluetooth phone, ipod, and backup camera.

5. From reading several forums, the add-on kits for iphone, bluetooth phone are not well regarded for integrating with stock PCM, while aftermarket is generally considered a better value. Any other issues to consider with an after market system besides the loss of instrument cluster nav guidance?

In my 2000 c4cab i did install an aftermarket alpine nav system with which I was very happy, but I am remiss to lose the indash navigation feature, although it currently is not workable due to the nonfunctional cd reader in the pcm unit.

Any guidance in fixing this acute problem is very appreciated, as well as separately input on options and aftermarket solutions.

Thanks.

-alan

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Last night after reading on this board, I did 1,4,8 to reboot the PCM. After doing that, I inserted disc 1a and the cd read the cd and nav was happy. So my friends at the porsche dealership service area were wrong - it wasn't the cdrom reader.

I then tried to use disc2 - Western US - (I live in California).

This disc reported "CD Can Not Be Read". It was quit scratched. I took it to a professional cd refurbisher, who polished it 3 times and the appearance was better, but it still could not be read. Quite plausibly this is due to the deep scratches in the cd.

I wonder if anyone might have a 2004 disc2 CD of which I could have a copy to restore the data on my scratched cd?

-alan

Edited by norcalcayenne
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  • 2 months later...
Last night after reading on this board, I did 1,4,8 to reboot the PCM. After doing that, I inserted disc 1a and the cd read the cd and nav was happy. So my friends at the porsche dealership service area were wrong - it wasn't the cdrom reader.

I then tried to use disc2 - Western US - (I live in California).

This disc reported "CD Can Not Be Read". It was quit scratched. I took it to a professional cd refurbisher, who polished it 3 times and the appearance was better, but it still could not be read. Quite plausibly this is due to the deep scratches in the cd.

I wonder if anyone might have a 2004 disc2 CD of which I could have a copy to restore the data on my scratched cd?

-alan

Do you still need the disc 2 - Western US?

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  • 2 months later...

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