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01 996 convertible top tonneau clamshell motor driving me crazy

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Hi folks,


Can someone please explain to me how the top tonneau clamshell lid motor (Fig.1) engages with the unlatching cords mechanism (Fig.3)?

I already changed two motors, replaced the inner rod with the plastic potentiometer gear and I still can't properly operate the clamshell cover.

If you look at the motor (Fig.2), only the outer ring with the small grooves will rotate but it will not engage with the metal part of the unlatching mechanism (Fig.3)

Am I missing something? I can ear the motor working when I operate the top but it doesn't unlatch or move if I don't do it manually. 

I only have a Time Out error on PIWIS and cannot complete the calibration, or even worse one time the soft top tried to fold over the closed clamshell cover...


Thanks for your help!





Edited by Doohan
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I cannot figure out how the groove part could get traction over the rounded metal surface, is there some kind of friction required? Shall I overtight the motor to the black assembly?

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  • 2 weeks later...

I purchased the repair kit for the top tonneau clamshell lid motor  996-561-673-00. Replaced the shaft and set the potentiometer at 6.2 K Ohms before re-installing.


Now I have other problems:




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10 minutes ago, Loren said:

I suggest running a top calibration.

Thanks Loren,


I tried several times but it always get stuck at the same position, with the half top portion vertical. The screenshot above is what is left in the fault memory...

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I will give it another try... I've already rebuilt the top latch that was misaligned by 3 notch in the positioning gear, I will move it of another notch to try to match the original synch.

If that works I'll have to deal with the dead (inaktiv!) side flaps, although they are not as expensive as the rest.


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