Page 2 of 2 FirstFirst 12
Results 11 to 13 of 13

Thread: [E34] Electrical gremlins after some time standing still

  1. #11
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,703

    Default

    Quote Originally Posted by Frank87 View Post
    Before:
    - experimented with a spare IHKA computer( the one with the 3 colored connectors). Same problem.
    - removed the auc sensor and module just in case. Same problem.

    Update to this thread:
    - I have replaced the DME, no change
    - I have replaced the Check Control Module, no change
    - I have replaced the A/C control panel with an identical one, no change
    - I have replaced the 3 buttons defrost/AC/AUC panel, no change

    Problem still remain:
    - cold air doesnt work whether A/C button is on or off. IHKA blows hot only
    - A/C doesnt work, there is no way to get the compressor going. System is leak free and full. All wiring resoldered where needed
    - rear window defroster does not work at all
    - check control on the instrument panel does not work. Bottom bar does not light up and if you shine with a light it says "Check Control, Betriebsanleitung"

    I have a total IHKA rebuilt. Going to swap it in a month or 2. Meanwhile I keep checking the electronics as I work on the car.
    Jump the hot lead to the compressor and watch it work. If not then you can trace it. If it works you can trace it. Not sure if I am missing a whole lot here just reading along.
    95 E34 530I V2.34
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

  2. #12
    Join Date
    Dec 2004
    Location
    Sydney, Australia
    Posts
    4,336

    Default

    Quote Originally Posted by 632 Regal View Post
    Jump the hot lead to the compressor and watch it work. If not then you can trace it. If it works you can trace it. Not sure if I am missing a whole lot here just reading along.
    Often the AC compressor will only come on in run IF there is enough gas in the circuit. A good way to check is to get a refill can, tap and gauge pipe, seat the can on a scale, and attach it to the low side (blue) and see if there is any pressure. If you open the tap to introduce fresh refrigerant, be sure to note the mass the can loses, that way you know how much goes in. Sometimes as little as 30g will return the system to pressure enough to allow the low pressure switch to open and the compressor to engage. I have one that needs 50g every few years... I really need to replace the o-rings, oil and gas afresh, but I am not sure I'll ever get the time

    Join the Aussie
    540i LE yahoo forum

    08/88 535i e34 M30+miller MAF, 'stiens, tints & teeth!

  3. #13
    Join Date
    Dec 2003
    Location
    Eastern Tennessee USi
    Posts
    14,703

    Default

    I have a can of I have not used and sitting on my desk. Debating weather to spend another $32 bux for little cans or get the mega jug for $130. I could have paid for the mega jug already. If it leaks out I have plenty of reserves ready plus maybe make some back filling other peoples stuff. I have all the gauges and stuff to legally do it.
    95 E34 530I V2.34
    ===========
    Those who make peaceful revolution impossible will make violent revolution inevitable.

    John F. Kennedy

Page 2 of 2 FirstFirst 12

Similar Threads

  1. List of electrical gremlins in my '92 525i Touring
    By pundit in forum 5 Series BMW
    Replies: 5
    Last Post: 01-29-2011, 07:19 PM
  2. '93 A/C electrical gremlins.
    By heelsroll in forum 5 Series BMW
    Replies: 0
    Last Post: 06-10-2008, 03:21 PM
  3. smoke after 2 weeks standing
    By bobchiba in forum 5 Series BMW
    Replies: 2
    Last Post: 05-07-2008, 05:51 PM
  4. Electrical gremlins in the dashboard....
    By Montreal525 in forum 5 Series BMW
    Replies: 1
    Last Post: 03-17-2007, 12:33 PM
  5. Electrical Gremlins are taking over my car
    By Al from jersey in forum 5 Series BMW
    Replies: 1
    Last Post: 09-03-2004, 01:18 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •