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

Connectors on gearbox 09D

 

Pos. 1 => 10-pin connector to multi-function switch -F125-

 

Pos. 2 => 14-pin connector to valve body/valves

 

Pos. 3 => 8-pin connector to valve body/sensors

 

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