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 MANUALSAUDI1998A8 SEDAN (4D2) V8-3.7L (AEW)REPAIR AND DIAGNOSISINSTRUMENT PANEL, GAUGES AND WARNING INDICATORSINSTRUMENT CLUSTER / CARRIERTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURESLOGIN PROCEDURE (FUNCTION 11)
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)
Login Procedure (Function 11)
1998 Audi A8 Sedan (4D2) V8-3.7L (AEW)SECTION Login Procedure (Function 11)
Login Procedure
NOTE:
- The secret number must be determined using the 14 digit identification number of the anti-theft immobilizer or Engine Control Module (ECM) by querying the system directly (like direct query of radio code). Furthermore, it is possible to obtain the secret number via the relevant distributor or importer.
- After the third incorrect input of the secret number; 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.
Login Procedure, Instrument Cluster
Indicated on display
Rapid data transfer HELP
Select function XX
- Press button -1- twice. This selects the "Login procedure" function 11.
Indicated on display
Rapid data transfer Q
11 - Login - Procedure
- Press -Q- button to confirm input.
Indicated on display
Login - Procedure
Input code number XXXXX
- Input the secret number, place a -0- before the 4 digit number (e.g. 01915).
- Press -Q- button to confirm input.
NOTE:
Once the login procedure has been successfully completed, the warning lamp will light constantly and the immobilizer will be switched free:
- as long as the engine is running and the ignition key is inserted
- for 45 minutes, as long as the ignition key is inserter (engine not running)
- for 5 minutes, if ignition key is removed
Indicated on display
Rapid data transfer HELP
Select function XX
CAUTION!
If this is indicated during the login procedure, the secret number was entered incorrectly (e.g. incorrect secret number)
Function is unknown or ->
cannot be carried out at the moment
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.