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996 c4 cruise activation problem

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Hi - just wondered if anyone out there may have a bit of specialist knowledge around instrument clusters.

I have a colleague with a 2001 996 C4 who had cruise retrofitted, by a specialist. However the specialist, and the local OPC were unable to fully activate the function - which is where I got involved.

I have both PIWIS and Durametric (pro) so ordinarily this would be a straightforward job to activate it using one or other of the systems.


On performing the module search with PIWIS everything seemed OK however on going into the instrument cluster module there is no option to activate the cruise control, although the DME does have it as per usual, and activated correctly.

I got the same problem using Duarametric.

Aware that sometimes a change of order code is necessary I tried changing it from 611 to both 410 and 411 (similar builds) however this did not make any difference and the cruise function is still not visible.

I have also added 454 (cruise control) to the vehicle order to see if this would work but again no change.

The instrument cluster fitted to this is part number 996.641.118.03 which according to PET is the correct part for this model.


Everything else on the vehicle works OK, but obviously no green 'cruise control' light on start up, and no functioning cruise control.


We could acquire another cluster but this obviously cannot guarantee sorting the problem. 


I have to say I'm a bit stumped by this one so thought I might see if anyone else had had a similar problem or be able to throw some ideas in.


I've not come across this before and have probably activated about 50 different cruise controls to date so any ideas would be well appreciated.


and before you ask no I'm not using dodgy oriental clone equipment so that can be ruled out :biggrin:






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yes it is

he pasted the question into pc gb  as my membership has expired.

if you have a chance would you be able to paste the response into here as I suspect it will come my way eventually anyway.

i was hoping it might reach you !


Edited by irb26
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Well I'm not sure it would help, as he said that it was the DME which couldn't be coded, not the instrument cluster.


There was an issue coding 9x6 instrument clusters with early versions of Piwis 2 software, but if you have tried with a genuine Durametric Pro, then I suspect it might be a cluster problem.  You can code them without any wiring in place, so I don't think the wiring would be causing it.

Edit See later post....

Edited by Richard Hamilton
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It's definitely the cluster which doesn't take the coding.

I'm using piwis 1 v34.


the menu option for cruise control simply doesn't exist in the cluster coding section where it should be. This is the same if I use durametric.

i had read of cars having problems if the model type wasn't set correctly in DME. But this doesn't make any difference if a different model type is entered - I thought I would give the forums a go for ideas as it's an expensive gamble to swap out the cluster to see if this resolves the issue.


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The process is to enter the order code in the DME>Vehicle Data, and confirm with F8. Then you need to do a complete control module search.  This is essential.  Then go to Instrument Cluster>Coding, and the cruise option should be there.


Is that how you did it?


Edit: See later post.....

Edited by Richard Hamilton
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Unless the retrofit wiring has been done incorrectly, and is somehow preventing coding, then I suspect the cluster.


Do Pie Performance do a lot of 996 retrofits? Are you sure the wiring is correct? As you know, there are several configurations depending on model year.  If you drop me a PM with your email address I'll send you the right wiring diagram. Also, let me know the model year.  Tony said it was a late 2000, which I assume is MY2001, but best to check.

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Greatest apologies to Ian (irb26) as I had a case of brain fade.  For 2000/2001 996s with DME7.2 it is not possible to code the cluster for cruise.  Coding is only necessary in the DME.  A wire is connected from the DME to the Instrument Cluster to illuminate the bulb only.  All the control is done in the DME.

I have suggested that Ian checks the wire to the cluster is connected to the correct terminal on the cluster, and that the cruise bulb is in place and working.

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