PD Monkey

I've had my Cayenne for about a month now and twice the PCM won't work. It "appears" to be working (alll screeens are on) but no sound. I've turn it on and off, no luck. Each time,I've turned the key on and off a few time it came back on. Any ideas on what might be the issue? Or just deal with it??

Dennis C

I get that occasionally too. It's infrequent though - only once or twice per year.

mudman2

Its a common enough problem on 03-05 models even 06 maybe

No easy cheap solution, we just deal with it and know that if you shut her down and leaver her for 5 minutes there's a good chance it will work agan

ltc

Larry

EnigmaWmn

Stalin
Mao
Larry

ultramens

I had the same problem, I have a 2004 CS with 65K miles.... I replaced the battery under the seat and it solved the problem...

ltc

No, actually that didn't solve the problem.

The amplifier is the cause, based on a random/seldom occurring failure of the micro controller to properly boot load the DSP firmware, resulting in a "no audio output" condition.

Now, the "volume stuck at 11 during an executive test drive" ...

ltc

Yes, they all had a gift when it came to "people skills"

Orantes

It has been discussed many times on the forum. It has happened to my 2004 only once in the past. Waiting for 5 or so minutes is the easy solution. It's a quirk of the car. ITC has given you the source of the problem. Unless you buy a new amplifier, most just live with this issue. Sorry, there's no easy answer....

ltc

Back in the early days, when P!gs were just beginning to roam the Earth, there was a TSB which installed a firrmware update to the amplifier (originally done via CD in the head unit; later done via PIWIS IIRC).
You just had to ask for it by describing the issue to your dealer.

It was not a 100% fix, but did reduce the frequency of the no audio output event.

ultramens

All i know is when I got the car... it happened multiple times within the first month... then after the battery change.. has not happened since... its been 6 months... not once has it acted up....

mudman2

Believe me its luck, don't be surprised when it happens again

Marc Gelefsky

Happened to me a couple of times, have not seen the issue again in at least a year and a half.

mudman2

Well that just the result of darn good devious design, can't think of anyone that clever....oh wait !!

ltc

Grasshopper ... don't try and ****** the pebble from my hand when it comes to this topic.