Possible cause of fault

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Short circuit to ground/open circuit between the micro switch locked and the control module
Micro switch locked in the closing aid defective

NOTE:

The status of the three micro switches in the closing aid for the Targa rear window can be read out in the menu item Input signals under Closing aid switch I to III.
There are 3 micro switches in total in the closing aid module