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CLIMatronic HVAC controls for early 928's (and maybe late too)

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CLIMatronic HVAC controls for early 928's (and maybe late too)

 
Old 03-21-2012, 07:57 PM
  #46  
svpmx83
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For those shopping for the GPIO board, I've had excellent service from DIY Autotune.

You will need the following
GPIO Kit http://www.diyautotune.com/catalog/g...kit-p-403.html
Parts Kit http://www.diyautotune.com/catalog/g...ift-p-404.html

and a few other bits from wherever you can find them - ebay has the TA8050P listed

BC327 PNP transistors x 2
IRF9540N P-channel Mosfet x 1
TA8050P H Bridge 1.5A driver x 1
10uf electrolytic cap x 1
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Old 03-22-2012, 11:55 AM
  #47  
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Initial in vehicle testing has gone well. Mosfets are running cool to the touch under load and contol logic for all manual functions is working as intended.
The AUTO feature still needs work so I'll get stuck into that early next week.

The build hints page is almost complete and also contains a link to the current firmware with Auto fan/heat control disabled.

and for giggles, here is a piccy of the other bits of the system in Project Stupid

Excuse the mess - there is a plan I promise

Last edited by svpmx83; 07-23-2015 at 03:27 AM.
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Old 03-22-2012, 12:39 PM
  #48  
Tom. M
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Cool!!.. how much you want for the RNS-E (LOL..need one for my A4)...and the RS steering wheel looks awesome. Are you planning on trying to make the paddle shifters work too?
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Old 03-22-2012, 12:52 PM
  #49  
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3 speed auto so no real use for paddle shifting - I 've been hooked for years on the multi function wheel with the voice control of the RNS-e and nav/bluetooth so it was a must install item in this car too.
And the next MS/Extra megasquirt code release will contain the canbus comms framework we developed to drive the 996 Instrument cluster
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Old 03-22-2012, 02:37 PM
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Thanks for all your work and openness on this Steve. I'm really looking forward to doing this on my project too!
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Old 03-22-2012, 02:38 PM
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If you use the 996/986 option do you just alter the connecting plug, or is it totally different??
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Old 03-22-2012, 03:33 PM
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Originally Posted by Champagne View Post
I feel obligated to jump in here.

Hans as worked really hard to design a replacement controller from scratch. And I came up with a simple but attractive fascia.
I'm sure most of you are aware of the project.

I'm just pointing out that our version is still in the works and should be ready shortly. I know a lot of you are waiting patiently.

Thanks

Paul
I am waiting patiently.
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Old 03-22-2012, 07:04 PM
  #53  
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Originally Posted by Maybach_Man View Post
If you use the 996/986 option do you just alter the connecting plug, or is it totally different??
I don't have one to check, but the differences if any will be minimal

The Porsche/Audi units use the same driver chip and have one extra button and no small temp display. so there may be some tweaking involved.
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Old 03-22-2012, 10:25 PM
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Steve, man I like this one. It looks great but I doubt we will find one for 45.00.
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Old 03-22-2012, 10:47 PM
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Old 03-22-2012, 11:33 PM
  #56  
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Originally Posted by svpmx83 View Post
I don't have one to check, but the differences if any will be minimal

The Porsche/Audi units use the same driver chip and have one extra button and no small temp display. so there may be some tweaking involved.
Here's the Audi equivalent.. fitting this to a 928 has been on my list of projects for a couple of years now, slowly working its way up Thanks Steve for posting this very interesting thread!

http://www.ebay.com/itm/ELECTRONIC-C...#ht_500wt_1413

The wiring schematics for the control unit are in this PDF (they're based on some Audiworld posts for retrofitting it to an earlier Audi 80 model).

http://users.on.net/~hilton/Audi%20A...rol%20Unit.pdf
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Last edited by Hilton; 03-23-2012 at 12:34 AM.
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Old 03-23-2012, 12:27 AM
  #57  
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The audi one illuminated

Made by hella seems to be the key, I'll have to see if i can get hold of one although I still prefer the VW unit
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Old 03-23-2012, 06:36 AM
  #58  
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I think the build page is now complete, fingers crossed of course.

No warranty - use at your own risk - Dont Try This at Home - for offroad use only - may burn your house down and/or damage the planet etc ..........

The thee modifications are -

1. Servo bypass wiring as per instructions.

2. Solenoids are now Low Side driven so either - insulate and run 12v common - or change to a more common two wire insulated unit - I'm using toyota ones

3. PWM fan operation provides a grounding signal capable of sinking 4A. As our fans are High Side driven - an external Pchannel Mosfet or PNP power transistor is required - I used a toyota unit and changed the NPN tranny to PNP and altered the pull down to pull up.

I've not written 2 & 3 up in the build page yet
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Old 03-23-2012, 10:26 AM
  #59  
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Steve,
Can you provide PN or year and model for the Toyota solenoids in #2 above?
And, for #3 above, is the 3 speed resistor pack not required anymore?
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Old 03-23-2012, 10:46 AM
  #60  
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The heat valve locking solenoid I'm using is a 25860-75181 - the venting hold release ones I'll grab numbers for tomorrow.

As for the resistor pack, I'm still using it for the always on low speed, which is normal practice for the oem systems I've seen.
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