ECU - Electronic Control Unit

In terminology of VW-group it's any electronic device, which has been carried out some logic function. Sometimes it looks like nonsens - even simple relay can be called ECU.

The coding of Electronic Control Unit used for explain the ECU where it is and what "neighbours" does it have. Very often on modern cars the coding is crossed with adaptation.

Adaptation of the Electronic Control Unit serves to explain to the ECU with whom and how to talk (If we have started to speak allegories) and serves as storehouse of various adjustable parameters. ( part of memory in the Control Unit which can be changed via internal software )

Measured Values Blocks ( MWB ) – various parameters being inbound or calculated. Considering to value of MWB Electronic Control Unit, trying to "control"... Using of MWB allows you ( if you know the basic parameters ) to find out "close to boundary" or temporarily arising ( intermittent, sporadic ) malfunctions and many other useful things at competent use.


Coding of automatic gearbox 09D in Audi Q7 2007


General note:

The automatic gearbox control unit -J217 is coded 504 by default.

This applies to:

I Steering wheels without Tiptronic buttons and without paddles

I Steering wheels with Tiptronic buttons

I Steering wheels with shift paddles

The different steering wheels are detected automatically by the gearbox control unit and monitored by diagnosis.

YZ Note:

The coding is only possible if there are no faults relating to the ABS control unit -J104 or the gearbox output speed sender -G195 in the fault memory of the automatic gearbox control unit J217.


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