MFSW with Heating retrofit problem.

[Richard Hamilton]

2012 Cayman 2.9 PDK (RoW)

I purchased a virtually new Multi-function Steering Wheel which came from a 997-2 that the owner had swapped for a paddle shift wheel.

Fitting it was easy, and after coding the modules for multi-function, that part of it works perfectly.

My problem is getting the steering wheel heating to work.  I fitted the appropriate 'clockspring' contact unit (955.652.211.22) as the old contact unit didn't have connections for the heater wires.  PET shows the steering column module for 2012 as being the type suitable for PDK (I250) and Steering Wheel Heating (I345), so I think I am OK there.

When I code the steering column module to ‘with heated steering wheel’ I get fault codes in the module.  The fault codes I get aren’t listed in the diagnostic manuals I have, but one is for the heater switch (8041), and the other for the heater itself (8034).  I also get a fault in the PDK control module (U1810) showing a signal fault in the steering column module.   I can't clear the faults unless I ‘un-code’ the steering column module, and then I can clear all the fault codes.

Looking at Input Signals, it shows the button as permanently actuated, so it might be a bad button.  I’ve tried getting the button out, but from what I can make out, you have to strip the whole wheel, which involves prising off and re-gluing the front of it back on.  Not sure I fancy doing that right now, and I'm beginning to think about buying a pair of driving gloves.  However, I know it will nag me.

So my questions are:

Has anyone successfully done it on a 2012 Cayman?

Can anyone confirm how to get the heating button out the back of the steering wheel?

 

[987_RDC]

Any way to check with multimeter to confirm the button is "stuck"?

[Richard Hamilton]

Thanks for the reply, and sorry, I should have updated this thread.  I took the wheel off and found that the signal wire from the switch to where it plugs in to the 'clockspring' is permanently grounded.  The only way to get to the internal wiring seems to be to remove the PDK switches, and prise off the front cover of the wheel.  PET shows an adhesive kit for this job, so I am reluctant to go any further.  If I end up investigating further I will update the thread again, but for now I have put it on hold.

 

I did fit a new switch first, and if it helps anyone in the future I can confirm that it comes out the back of the wheel.  There are two plastic tags on the switch which clip into the back of the spoke.  They are darned tight, and one broke when I removed it.  I had already bought the switch, which was about £11.00 GBP, so not hugely expensive.