Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Newbie with PCM problem saying hello...

Recommended Posts

Hi there! Congrats for collectively succeeding in making this forum a great resource to all enthusisasts :) I have been a contributing member since Dec 2008 and had extensively used this forum to research the Cayenne before getting one last week. Finally....got myself an 04 Cayenne S. I gather from this forum that it's best to get an 05 onwards...but I bumped into an 04 CS with full leather dashboard, bi-xenon, PCM, multi-function steering, parktronic, multi-function steering, inflatable spare tyre, parktronic, sunroof and thought I'd enjoy better a higher specd than a younger car!

Anyway, despite sending the car to a Porsche specilalist for a PIWIS inspection (and gotten thumbs up!), I soon discover I have a couple of problems I need help with:

1. PCM - after setting the time say to 1625 hrs, the clock on the PCM does not "tick" i.e. time is frozen. It will synchronise (in the first minute or so) with the clock on the dash....but nothing happens after. The clock on the dash will continue to work while you drive (say till 1700hrs) but once the ignition is off, the clock will go back to the earlier reset time of 1625 hrs. Seems my car was installed with PCM 2 and Software 2. Some say I need to install Software 3 and that will solve the problem. The PCM also prompts me to insert the CD when I press the "Navi" button...does this mean this car has Sat Nav?

2. Airbag Fault Warning - the light is on now.

3. Water hose for the rear wash-wipe is leaking (didn't check this one prior to purchase). Not sure where the weak point is, but my interior headlining is now wet! Seems this is a common problem on 03/04 cars.

4. Odometer - the odometer cannot be reset to "zero". Not sure if this failure has anything to do with the clock not functioning well.

I also gather that it could be a simple matter of installing a new battery to eliminate all these "malfunctions". Whatever it is, I am new to this and I greatly appreciate your help in sorting this out. Many thanks!



Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.