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PST2 & PIWIS test step aborted

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Sometimes when programming the DME or Alarm control unit with the PST2 or PIWIS, you will get an error of "Test Step Aborted" followed by an error number, such as 3, 21, 25, 71 etc.


I have the PST2 manuals, as well as the KTS manuals and the 986 and 996 Dealer manuals, but one thing I have not been able to find in any of them is a list of error codes that follow the "test step is aborted message"


Sometimes, I have had the errors when I have put in an incorrect "old immobiiser code", or "old learning code", which kind of make sense.. But I often get the error when programming a control unit (yes I do have 14v onto the control unit and pin 60 powered up on the DME when it is a 5.2.2 DME)


Has anyone ever found a list of the error codes and what they mean, or even worked out what they mean?


When programming a DME 5.2.2 for example, I can often get to about 90 percent on the progress screen before it bombs out with one of these codes.


The unit will still start the car etc if it bombs out, so I don't think it is a bricked DME, but I am just curious about the meaning of the error codes


Anyone have any clues? or is my curiosity sending me towards a massive mission of discovery in an unwalked path? lol

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35 minutes ago, rennbod said:

Have looked in the 986 manuals and do not recall seeing the error codes mentioned in the 996 manuals.


Do you have any clues where they may be?


Error codes are covered in the OBD II manual, which was a separate publication.

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  • 1 year later...

--- Update for the archive ---


Following some help from an amazing chap in here who sent me a copy of the pinouts for the PST2, I can confirm that the problems with programming the Bosch 5.2.2 DME, and therefore the system error codes (not DME fault codes), were down to my PST2 lead missing a couple of pins being connected within the OBDII lead, which had the result of the PST2 failing to verify blocks had been programmed when it read them back. So error code 71 will be a "Data not successfully written" error of the PST2.


I would name the helpful chap, but he had asked me to not mention it, so unless he wants to wave his hand, he will remain nameless but a superstar!

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