Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSAUDI2001A6 AVANT QUATTROREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCRUISE CONTROL SYSTEMSON BOARD DIAGNOSTIC (OBD) - 2001 AND UPANTI-THEFT IMMOBILIZER, ON BOARD DIAGNOSTIC (OBD)LOGIN PROCEDURE (FUNCTION 11)LOGIN PROCEDURE, ENGINE CONTROL MODULE (ECM)

2001 Audi A6 Avant Quattro

Login Procedure, Engine Control Module (ECM)

2001 Audi A6 Avant QuattroSECTION Login Procedure, Engine Control Module (ECM)

Display on VAS 5051:

Fig 1: Display On VAS 5051 - Login Procedure, Engine Control Module (1 Of 6)

Courtesy of AUDI OF AMERICA, INC.

Press selection -1- of vehicle system "01 -Engine electronics".
Wait until the next indication appears on display.

Display on VAS 5051:

Fig 2: Display On VAS 5051 - Login Procedure, Engine Control Module (2 Of 6)

Courtesy of AUDI OF AMERICA, INC.

Control module identification of Engine Control Module (ECM).
Control module identification of immobilizer

Click on --> button

Display on VAS 5051:

Fig 3: Display On VAS 5051 - Login Procedure, Engine Control Module (3 Of 6)

Courtesy of AUDI OF AMERICA, INC.

In selection -1-, select the diagnostic function "11 - Login-procedure".

Display on VAS 5051:

Fig 4: Display On VAS 5051 - Login Procedure, Engine Control Module (4 Of 6)

Courtesy of AUDI OF AMERICA, INC.

Enter code word Max. input value = 65535

Enter 7-digit PIN (of Engine Control Module (ECM)) in button field -2-.
Press -Q- button to confirm input.

NOTE:

After the third incorrect input of the 7-digit PIN, the control module for anti-theft immobilizer or Engine Control Module (ECM) will be locked.
It is not possible to make another attempt for 10 minutes. During this time, the ignition must remain constantly switched on. On Board Diagnostic (OBD) must be exited using the "End Output" function 06. This time is doubled after every third consecutive incorrect attempt, up to a maximum of 255 minutes.

Display on VAS 5051:

Fig 5: Display On VAS 5051 - Login Procedure, Engine Control Module (5 Of 6)

Courtesy of AUDI OF AMERICA, INC.

The Engine Control Module (ECM) is now switched free.

NOTE: If indication -1- appears in display field: "Function unknown or cannot be performed at this moment", the 7-digit PIN was entered incorrectly (e.g. incorrect secret code)

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.