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.


J138_4D_19_AFB_1_0898.htm
J17_4D_20_AKC_1_0301_21.htm
J17_4D_20_AUX_1_0300_23.htm
J17__4D_20_ACK_1_0997.htm
J17__4D_20_AFB_1_0898.htm
J271_4D_24_AKC_2_0301_21.htm
J271_4D_24_AUX_2_0400_23.htm
J299_4D_26_AKC_1_0301_21.htm
J299_4D_26_AQD_1_0200.htm
J299_4D_26_AUX_1_0500_23.htm
J322_4D_23_AFB_1_0898.htm
J338_4D_24_AKC_1_1100_21.htm
J338_4D_24_AKC_3_1100_21.htm
J338_4D_24_ANK_1_0601_21.htm
J338_4D_24_AUX_1_0200_23.htm
J338_4D_24_AUX_3_0400_23.htm

The fuel pump relay -J17 is located at relay socket 4 of the central electrics in the electronics box in the passenger side footwell.

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