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.


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J217_4B_38_01J_1_0304_21_MWB_lesen.htm
J217_4B_38_01J_1_0304_21_RdW_codieren.htm
J217_4B_38_01J_2_0304_21_USA_codieren.htm

Coding table

Multitronic control unit 01J in

Audi A6  1998

 

KGeneral note

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

I Steering wheels without Tiptronic buttons and without paddles

I Steering wheels with Tiptronic buttons

I Steering wheels with shift paddles

For details of the classification of steering wheel with Tiptronic buttons and with shift paddles refer to the Fitting Location documents in test program J217 - Multitronic, coding (Repair Group 38)

 

 

Model years 1998 to 2001

 

Coding value 00001         

This coding value is applicable to all vehicles with multitronic

 

 

From model year 2002

 

Coding value 00001         

This coding value is applicable to all vehicles with multitronic

 

Coding value 01001

In selector lever position D the steering wheel Tiptronic buttons or shift paddles can be used to switch briefly to manual shift mode (Tiptronic mode), i.e. press the '+' button to shift up and '-' to shift down

This function can by disabled by coding value 01001, i.e. operating the steering wheel Tiptronic buttons or shift paddles can only change gear in the Tiptronic gate.

KNote The factory coding is: 00001

 

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