Audi Workshop Service and Repair Manuals

Notes:

• ◆ If new or additional ignition keys are required, they have to be matched to the immobilizer.
• ◆ All keys - including the existing authorised ones - have to be re-matched.
• ◆ It is particularly important to re-match all the remaining vehicle keys if any have been lost to ensure that the lost key is no longer authorised to start the vehicle.
• ◆ If matching cannot be performed for all keys, for example when matching is required en route, customers are to be informed of the necessity of subsequent re-matching at their local Audi Dealership.
• ◆ The number of keys already matched is displayed following selection of adaption function (channel 21) and in measured value block 022.
• ◆ Once a key has been matched, it is blocked and cannot be matched to any other immobilizer system.

Requirement:

• ● All ignition keys available. If no old ignition key is available, refer to => "Procedure in the event of loss of keys", Page01-392.

Sequence of operations

• ‒ Insert first key in ignition lock and switch on ignition.
• ‒ Establish immobilizer identification number by starting immobilizer self-diagnosis .
• ‒ On the basis of the 14-position immobilizer identification number, request 7-digit PIN from appropriate Sales Centre/importer.

Note:

The PIN is only valid for one day, after which a new number has to be requested. The PIN is of no use to the customer or other dealerships.

→ Display on VAS 5051:

• ‒ From list -1- select diagnosis function "Release (PIN)".

• ‒ Touch "Ready" key.

• ‒ Touch key
  "Press here to display entry keypad".

• ‒ Use keypad to enter previously established 7-digit PIN.
• ‒ Touch ▸ key.

• ‒ Check entry and then touch "Yes" key.
• ‒ Incorrect PIN entry can be corrected by touching "No" key.

• ‒ Touch "Ready" key.
• ‒ When this display appears, fault lamp in dash panel insert lights and immobilizer has been released

Notes:

• ◆ Heed instructions on display if fault message appears.
• ◆ → 3 attempts at entering correct PIN can be made without a waiting period. The next 3 attempts are only possible after at least 10 minutes. For this, leave ignition on and exit from self-diagnosis by touching diagnosis function "06 - End of output" in list -1-.
• ◆ The waiting time is doubled up to a maximum of 255 minutes after every 3 further incorrect entries.

Once immobilizer has been released:

→ Display on VAS 5051:

• ‒ From list -1- select diagnosis function "10 - Adaption".

→ Display on VAS 5051:

•     1 -    Enter channel number

• ‒ Use keypad -2- to enter "21" for "Adaption channel 21" and confirm by touching Q key.

→ Display on VAS 5051:

•     1 -    Channel 21
  Read and test
•     2 -    New number of
  keys
•     4 -    Moving bar positioned on current adaption value, e.g. "2"
  Display shows number of ignition keys (in this case "2") matched to system

→ Display on VAS 5051:

• ‒ Enter number of keys to be matched.

Example: 4 keys including key inserted in ignition lock

Note:

A maximum of 8 keys can be matched.

• ‒ Shift moving bar -5- to right or touch area to right of bar until it is positioned under number "4" (example).

Note:

Another alternative is to touch "Keypad" key -3-, enter number "4" on keypad and confirm entry by touching Q key.

• ‒ Touch "Save" key -4-.

→ Display on VAS 5051:

•     1 -    Channel 21
  Read and test
•     2 -    New number of
  keys
•     4 -    Original value "2"
  New value "4" (example)

• ‒ Confirm new adaption value by touching "Accept" key -3-.
• ‒ Adaption is then implemented

Note:

The adaption period for each key must not exceed 30 seconds, as otherwise fault lamp in dash panel insert starts to flash and entire release procedure (PIN) must be repeated.

→ Display on VAS 5051 following adaption:

•     1 -    Channel 21
  Value "4" saved
• ‒ Fault lamp in dash panel insert goes out; key in ignition lock matched

• ‒ Terminate function "10 - Adaption" by touching ◂ key.

→ Display on VAS 5051:

• ‒ From list -1- select diagnosis function "06 - End of output".
• ‒ Switch off ignition.
• ‒ Insert next key in ignition lock and switch on ignition. Fault lamp lights when ignition is switched on and goes out after approx. 1 second, indicating that this key has also been matched.
• ‒ Repeat procedure until all keys have been matched. With the last key, the fault lamp goes out approx. 2 s following successful matching and a brief confirmation signal is given (lamp off for 0.5 s, lamp on for 0.5 s, lamp off).
• ‒ On vehicle key matching, the fixed code of the respective key (transponder) is matched to the immobilizer. Furthermore, the arithmetic rule for the variable code is written into each key and blocked. Accordingly, with immobilizer III, keys can only be matched if they have the correct arithmetic rule for the variable code (key already matched to system) or if they have still to be blocked (replacement key). Once they have been matched, vehicle keys cannot be used with a different immobilizer system.

• ‒ Following key matching, interrogate fault memory => Page 01-361.

If there are no faults stored, then "Key matching" function has been successfully completed.

Ignition key matching is terminated automatically:

• ◆ On reaching the number of keys to be matched
• ◆ If the ignition is switched on again and left switched on for more than 1 s using a key which has already been matched (fault is stored)
• ◆ If the permitted matching time of 30 s per key as of switching on the ignition is exceeded (fault is stored)
• ◆ If a fault is stored during key matching