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.


J104_8E_45_ESP_1_0800_21.htm
J104_8E_45_____1_0304_21_Adapterkabel_1598_51.htm
J104_8E_45_____1_0403_21_ESP_Fahr_System_Test.htm
J104_8E_45_____1_0403_21_Messwerteblock.htm
J104_8E_45_____1_0505_21_Messwerteblock.htm
J104_8E_45_____1_0604_21_Datentraeger_B7.htm
J104_8E_45_____1_0704_21_SG_Tausch.htm

Data sticker with production numbers

 

Data sticker locations:

J Audi Service Booklet

J Label in spare wheel well in luggage compartment

or

in ELSA enter vehicle ident. number and start enquiry and in dealer portal call up PR number

 

-A- Pr.no. brake system, front axle

-B- Pr.no. base engine

-C- Pr.no.running gear

-D- Gearbox

 

e.g. M6S signifies 6-speed manual gearbox

 

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