Audi Workshop Service and Repair Manuals > A4 Mk1 > Power unit | MPI Fuel Injection and Ignition system | Self diagnosis, V.A.G Inspection Service

MPI fuel injection and ignition system

Encoding the control unit

If the appropriate code for the vehicle is not displayed or if the control unit has been replaced, the control unit must be encoded as follows.

‒ Connect up vehicle diagnosis, measurement and information system VAS 5051 or fault reader V.A.G 1551 and select engine electronics control unit with "Address word" 01 .
When doing this the ignition must be switched on.

→ Indicated on display:

Rapid data transfer HELP

Select function XX

‒ Enter "07" for the function "Encode control unit" and confirm entry with Q key.

→ Indicated on display:

Encoding control unit Q

Enter code number XXXXX (0-32000)

‒ Enter the control unit code in accordance with the encoding table => Page 01-87.

Key to the code:


Example of encoding
04001	European Union member state, FWD with no traction control system, 5-speed manual gearbox, Audi A4

→ Indicated on display (example):

Encoding control unit Q

Enter code number 04001 (0-32000)

→ The fault reader V.A.G 1551 display will show the control unit identification. For example:

8A0906266J 2.8l V6/2V MPI D03 ⇒

Code 04001 WSC 12345

Note:

→ Indicated on display:

Function is unknown or ⇒

cannot be performed at present

The code number that was entered was not valid.

→ Indicated on display (function selection):

Rapid data transfer HELP

Select function XX

Note:

The next time the ignition is switched on, the code entered will be activated.

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