Menu toggle

Air bag fault

Author
sim500
PCGB Member
  • Total Posts : 23
  • Joined: 2015/10/06 14:22:46
  • Status: offline
sim500 PCGB Member
2019/01/10 12:51:30 (permalink)

Air bag fault

Hoping someone can help here or it's a trip to main dealer from what I've learnt so far. Last year I removed seat belts front and rear and sent them away to have the webbing changed to red. The company I used had a stand at the simply Porsche event held at Beaulieu last year and after chatting with them about it decided they were the way to go. Now I know I should have disconnected the battery first but stupidly didn't so now after refitting I now have airbag light up which I realise must have something to do with the pre tensioners on the front belts which I had to disconnect. Local garage managed to clear 2 faults but there are still one fault for either side. Is this Porsche specific ie only they can clear it or do you think I may have damaged something . Fault codes left showing are 22 and 24. 32 and 34 were cleared ok.  Car is 2004 C4S   Thanks in advance 
Simon

5 Replies Related Threads

    Richard_Hamilton
    PCGB Member
    • Total Posts : 8008
    • Joined: 2004/10/08 11:07:01
    • Status: offline
    Richard_Hamilton PCGB Member
    Re: Air bag fault 2019/01/10 13:47:16 (permalink)
    Fault code 22 (Driver's side) and 24 (Passenger Side are caused by:


    1. Incorrect coding of airbag control unit
    2. Bad wiring between airbag CU and seat belt tensioner
    3. Seat Belt tensioner faulty
    4. Airbag control unit faulty
    You need a PST2 or PIWIS tester to check the coding.  It isn't impossible that it has lost the coding.
     
    The wiring is another possible, but unlikely fault, especially being both sides.  However, are you sure the connectors are locked in on both sides?  The lock mechanism on the plug is fairly fragile, and if the plug doesn't lock in properly it won't connect.  Porsche sell the plugs as a replacement item, so there is obviously a need for them!
     
    To check the seat belt tensioners, you can remove both plugs and insert 2.8 ohm resistors, which will simulate the tensioner.  If you can then clear the codes and reset the airbag light, then you know the problem is with the tensioner.  If it still won't reset, you know it is the triggering unit.
     

    Richard
    1989 3.2 Carrera Sport in Guards Red/Linen & Audi RSQ3
    Previous:
    2012 Cayman 2.9 PDK, 2006 Cayman S, 2000 996 Turbo, 1998 996 C2, 1994 993 C2
    sim500
    PCGB Member
    • Total Posts : 23
    • Joined: 2015/10/06 14:22:46
    • Status: offline
    sim500 PCGB Member
    Re: Air bag fault 2019/01/11 05:53:48 (permalink)
    Hi Richard. Thank for the speedy response. I did double check connections ie the orange clips on the plugs were fully locked in home position. They certainly weren't damaged and clicked in positively. Will seek out someone with the readers you suggested and let you know how I get on. Am also in the middle of changing high pressure hose for the power steering located in engine bay. Awkward isn't a strong enough word. 
    Richard_Hamilton
    PCGB Member
    • Total Posts : 8008
    • Joined: 2004/10/08 11:07:01
    • Status: offline
    Richard_Hamilton PCGB Member
    Re: Air bag fault 2019/01/11 09:11:03 (permalink)
    If you are anywhere near me (Maidenhead, Berkshire) I would be happy to plug mine in for you.

    Richard
    1989 3.2 Carrera Sport in Guards Red/Linen & Audi RSQ3
    Previous:
    2012 Cayman 2.9 PDK, 2006 Cayman S, 2000 996 Turbo, 1998 996 C2, 1994 993 C2
    sim500
    PCGB Member
    • Total Posts : 23
    • Joined: 2015/10/06 14:22:46
    • Status: offline
    sim500 PCGB Member
    Re: Air bag fault 2019/01/11 15:14:56 (permalink)
    Thankyou, that's a very kind offer but unfortunately I'm Maidstone Kent and although I'd happily use the excuse for a drive out the Mot is now overdue until I can get this cleared. I'm working on it and have a number of a local guy that is supposed to be an expert in this field. Will call and see if he has either of the readers you mentioned. Thanks again and I'll keep you updated 
    Simon
    sim500
    PCGB Member
    • Total Posts : 23
    • Joined: 2015/10/06 14:22:46
    • Status: offline
    sim500 PCGB Member
    Re: Air bag fault 2019/01/31 11:06:22 (permalink)
    Just an update with the original fault on this post. The lock mechanism (orange clip)on each plug (green) for the front seatbelt pretensioners Richard mentioned in his reply were both in the unlocked position. I hadn't slid them back across after I'd plugged back in. They apparently are for antistatic as well as locking. Many thanks for replies and suggestions. They guy who reset the fault was a friend of a friend and works the south east Kent area if any of you in that area needs a mobile auto electrician. Can give you his number if needed.  Looking at a possible remap now to improve throttle response.  Watch this space
    Simon
    Jump to:

    Posts made and opinions expressed are those of the individual forum members

    Use of the Forum is subject to the Terms and Conditions

    Disclaimer

    The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

    Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

    When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

    Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

    Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

    © 2019 APG vNext Commercial Version 4.6