Possible cause of fault

Incorrect vehicle type selected in 9588 Porsche System Tester II
9588 Porsche System Tester II is not connected correctly or is faulty
Power supply to the 'Tiptronic control unit' is not OK
'K-line' to 'Tiptronic control unit' faulty
'CAN drive' does not function
'Tiptronic control unit' does not function