Possible causes of fault
WARNING: This page is about a different car, the 2006 Porsche Cayenne, 2005 Porsche Cayenne, 2004 Porsche Cayenne, and 2003 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
'Longitudinal lock LED' is activated by transfer box control unit on the ground side.
- 'Short circuit to B+': longitudinal lock LED does not light
- 'Short circuit to ground': longitudinal lock LED permanently lit