LEMON Manuals: Even more car manuals for everyone
Home >> Porsche >> 1998 >> Boxster Standard >> Repair and Diagnosis >> Engine Performance >> System >> DME 5.2.2 Diagnosis >> General >> ECM signal output

ECM signal output

If a malfunction is detected and stored, these values are also stored and can be read out later with the scan tool. This makes troubleshooting much easier because operation data are available that were apparent at the moment of the malfunction.

These "freeze frame"  data of a malfunction are stored at the first occurrence of the malfunction. If the same malfunction occurs a second time also these "freeze frame"  data are stored. Each additional occurrence of the malfunction triggers the "freeze frame"  data of the last malfunction. This means that the "freeze frame"  data can be read for the first occurrence of a malfunction and the last occurrence.

They can be read out only with the Porsche System Tester 2.

The Engine Control Module has to monitor the following signals (freeze frame data) (SAE J1979):

scientia non olet · About LEMON Manuals