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.


J217_4L_37_09D_1_0103_21_Grundeinstellung.htm
J217_4L_37_09D_1_1105_21_MWB_lesen.htm
J217_4L_37_09D_6_1205_21_codierung.htm
J217_4L_37_09D_7_1205_21_ersetzen.htm
J217_4L_37_09D_8_1205_21_PINbelegung.htm
J217_4L_38_09L_1_0905_21.htm
J217_4L_38_0AT_1_0106_21_ersetzen.htm
J217_4L_38_0AT_1_0106_21_MW_lesen.htm
J217_4L_38_0AT_1_1205_21_Pinbelegung.htm
J217_4L_38_0AT_2_0106_21_codieren.htm
J217_4L_38_____1_0206_21_Sicherung_Get02.htm
J587_4L_38_09D_4_1205_21_PIN.htm

Coding table

Automatic gearbox control unit 0AT in Audi Q7 2007>

 

The coding is formed by adding together the individual items.

Coding values:

1 A Start value, to be coded by default

+ 1 A Country variant USA

+ 10 A Hill hold off

+ 1000 A Tiptronic switches* on steering column inactive in selector lever position D

 

YZGeneral note

In coding of the automatic gearbox control unit -J217 a distinction is made between

I Country variant:

I Gearshift by Tiptronic switch* on steering column

I Hill hold function

 

Example code:

The vehicle is operated in the USA and the customer does not want the hill hold function.

The code is then composed as follows:

1 A Start value, to be coded by default

+ 1 A Country variant USA

+ 10 A Hill hold off

+ 1000 A Tiptronic switches* on steering column inactive in selector lever position D

The code is: 1+1+10 = 12

 

In vehicles fitted with a steering wheel with Tiptronic switches, the function can be disabled. In selector lever position D the steering column Tiptronic switches can be used to switch briefly to manual shift mode (Tiptronic mode), i.e. press '+' to shift up and '-' to shift down. This function can by disabled by coding value 01000, i.e. operating the steering column Tiptronic switches can only change gear in the Tiptronic gate.

 

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