Volkswagen Workshop Service and Repair Manuals

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 and auxiliary items

• ◆ 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 .)

• ‒ Press keys 1 and 1 for the "Login procedure" function and confirm entry with Q key.

• ‒ Press keys 0, 1, 2, 8 and 3 for the Login code 01283 and confirm input with Q key.

• ‒ Press keys 0 and 7 for "Code control unit" function and confirm input with Q key.

• ‒ Enter the appropriate code number for this vehicle and confirm with Q key.

• ‒ Press ⇒key.

• ‒ Press keys 0 and 6 for the "End data transfer" function and confirm input with the Q key.

Note:

The code unit entered and shown on the display will not be used by the Motronic control unit until the ignition has been switched off once.

An incorrect coding leads to:

• ◆ Engine running faults
• ◆ Increased fuel consumption
• ◆ Increased emissions
• ◆ Faults stored in fault memory which are not actually present
• ◆ Reduced gearbox life