Volkswagen Workshop Service and Repair Manuals

Notes:

• ◆ A 5-character code must always be displayed during the control unit identification.
• ◆ The control unit must be recoded if the vehicle relevant coding is not displayed or the control unit has been renewed.

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

• ◆ Fault reader V.A.G 1551 with cable V.A.G 1551/3

Work sequence

• ‒ Connect the fault reader V.A.G 1551 (V.A.G 1552). Then switch ignition on and select engine control unit with the "Address word" 01.
  (Connecting fault reader and selecting engine control unit .)

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

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

• ‒ Switch off ignition and repeat procedure.

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

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

Coding variants:

• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the "End output" function and confirm input with the Q key.
• ‒ Switch off ignition.

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 (gear change jerks, load change jerks, etc.)
• ◆ Increased fuel consumption
• ◆ Increased exhaust gas emissions
• ◆ Faults stored in fault memory which are not actually present
• ◆ Reduced gearbox life