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)

Heating and Air Conditioning fault code


Recommended Posts

I have a 98 Boxster w/ tip. As some of you know I have beeen having trouble with my cooling system after I replaced my water pump. It seems that the fans are not operating correctly now. I was going through fault codes with the Durametric and in Heating and AC code 20 came up, which is listed as Combi-interface Fault. I have not been able to find anything through search or my manual. Has anyone come across this before, or does anyone know what it means. Thanks in advance, Ed

Link to comment
Share on other sites

I got a reply from Owen at Durametric about this fault. He explained how to diagnose the problem but I still don't understand the problem. Can anyone suggest a direction to go in the research the code and what it means or is it a dealer only problem? Thanks, Ed

Link to comment
Share on other sites

  • Admin

Fault code 20

Interface to instrument cluster

Possible causes:

- Open circuit

- Short to ground

Open circuit

1. Unplug connector B from the heating/air-conditioning control.

2. Unplug connector III from the instrument cluster.

3. Connect ohmmeter to connector B 13 and to connector III pin 26.

Display < 5 ohms

Note: The wire is routed via the 12-pole plug connection on the heating/air-conditioning unit.

Short to ground

1. Unplug connector B from the heating/air-conditioning control.

2. Unplug connector III from the instrument cluster.

3. Connect ohmmeter to connector B 13 and ground.

Display: infinite ohms

If 0 - 5 ohms is displayed, check wiring harness for pinching and chafing damage.

First obvious check would be for a loose or disconnected plug.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • 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.