Notes on fault memory / troubleshooting

The ABS MIL or TC MIL can light up although no fault is stored in the fault memory. The following faults are possible in this case:

• Mechanical switching contacts (arrows) in the control module connector bent. As a consequence, these contacts are permanently connected to ground (ground of PIN 19 connected to PIN 20 and PIN 21).

  Explanation:  Normally, these contacts are grounded only when the connector is pulled off. This causes the ABS MIL or the TC MIL to be activated when the engine is running.

• When the engine is running, the "terminal 61" signal is missing at the control module. This can be checked with the Porsche System Tester 2 via the Input signals  menu (see INPUT SIGNALS (ABS AND ABS/TC)  ).
  Fig 1: Identifying Mechanical Switching Contacts In Control Module Connector Bent And Pin Points

  Courtesy of PORSCHE OF NORTH AMERICA, INC.