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Interrogating and erasing fault memory > < Connecting fault reader V.A.G 1551 and selecting engine electronics control unit

Leon Mk2

Motronic injection and ignition system
Self-diagnosis
Coding control unit

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

Special tools, testers, measuring instruments and auxiliary items required

  • ◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3

Work sequence

  • ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552) and with ignition switched on select engine electronics control unit with the "Address word" 01.
    (Connecting fault reader and selecting engine electronics control unit .)
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Press keys 0 and 7 for "Code control unit" function and confirm input with Q key.
 
→ Indicated on display:
Code control unit    HELP
Input code number XXXXX    (0-32000)
  • ‒ Enter the appropriate code number for this vehicle and confirm with Q key.

Coding

For following vehicles

00000

Alhambra VR6 with manual gearbox

00001

Alhambra VR6 with autom. gearbox
 
→ The fault reader V.A.G 1551 display will show the control unit identification, e.g.:
021906256H MOTRONIC M3.8.1 AT V0 1⇒
Coding 00001    WSC xxxxx
  • ‒ Press ⇒key.
 
→ Indicated on display:
Rapid data transfer    HELP
Select function XX
  • ‒ Press keys 0 and 6 for the "End output" function and confirm input with the Q key.

Interrogating and erasing fault memory > < Connecting fault reader V.A.G 1551 and selecting engine electronics control unit