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I just pulled a couple of fault codes from the CCU - 45 for the "Inside sensor motor" and 32 "Right mixing flap motor". Is there a way to tell if this is an issue with the CCU or the actual component. I had changed the sensor motor because the old one was a little noisy with another one I had sitting on a shelf - but that could be bad too. Same with the flap motor, how do I know it's the CCU vs the motor. These parts are getting expensive and I'd rather repair than throw money at the problem.
is the fan spinning? does your CCU regulate the temperature or does it drift when set?
On the flap motor, Mine all work correctly, but on occasion I will get a flap error in the CCU. maybe its going bad... not sure but my system is working.
Yep, I reset the code and these two are coming back. Fan is not spinning. Does anybody know if they just run on 12v so I can bench test it? I don't want to blow it up with 12v 😳. While temp is holding - it's not that cold yet in Chicago - I do get a whistle sound from the vents when temp is set to anything other than cold.
If the fan is not spinning its motor have given up the ghost and it needs changing.
The same is the case for the servo, the internal motor has weared out and shorted, causing a burn mark on the internal PCB end switch arrangement. You can either buy a new servo from Porsche or have the old servo refurbished. PARTisan Autoteile in Germany has refurb kits.
Cheers,
Tore
If your fan motor is not spinning you can refurb that too.
Do a search for it here, you should find the info you need. Parts wise I just used new brushes (from Pelican Parts), something to polish the contact point of the brush on the motor side and got some ball bearings to replace the bushings.
You do need (very basic) soldering skills as well.
Anybody mildly mechanically inclined can di this job.
Just giving you options. I decided this route because parts were not available to replace back then.
Navaros, I guess you mean the main blower fan motors.
The CCU fan is a brushless design, but the motor magnets weaken and the needle bearings wear out over time.
Cheers,
Tore
Navaros, I guess you mean the main blower fan motors.
The CCU fan is a brushless design, but the motor magnets weaken and the needle bearings wear out over time.
Cheers,
Tore
Tore,
Yes, I was thinking of the blower motors indeed. Should have read more thoroughly.
For the CCU fan I have a Jag OE replacement part I bought from eBay. Ofcourse it was a low mileage car, like every donor car part on eBay. But it only set me back 7 USD. It was an auction.
So to the OP: you may want to search for a thread that has part numbers for replacement fans of you want to go that route. Again, just one option I'm sharing.
Yes, the fan gets 12V from the CCU.
Be sure to connect it properly, use a voltmeter on the CCU output connector to determine the polarity.
Cheers,
Tore
Putting 12v on the blue wire makes the fan spin counterclockwise (viewed from above). That seems counterintuitive since the fan vanes appear to be designed to scoop air in. If the fan runs counterclockwise it does not seem to scoop any air. It is supposed to blow air through the CCU rather than suck air in, right?
Putting 12v on the blue wire makes the fan spin counterclockwise (viewed from above). That seems counterintuitive since the fan vanes appear to be designed to scoop air in. If the fan runs counterclockwise it does not seem to scoop any air. It is supposed to blow air through the CCU rather than suck air in, right?
I thought the same but it does suck the air in thru the dash it’s sampling the air temp in the cabin not under the dash
09-29-2019, 06:23 PM
CCU Fault Code 45 and 32
