Ignition Key In Signal: Service and Repair
Adaptation of Vehicle Keys
NOTE:
- If new or additional ignition keys are required, they must be adapted to the anti-theft immobilizer
- All ignition keys, including those that were previously authorized, must be re-adapted.
- Especially when a key has been lost, all vehicle keys should be re-adapted, since this will render the lost key unauthorized for vehicle start.
- If it is not possible to adapt all keys for some reason, i.e. during a trip, the customer must have this done later at his/her local Audi dealership.
- The number of adapted keys is indicated after selecting the adaptation function (channel 21) and also in measuring value block 022.
- Adaptation can be interrupted using the "C" button of the VAG1551 scan tool.
- Once a key is adapted, it is locked and cannot be adapted to another immobilizer system.
Requirements
All keys available. If there are no ignition keys available, see "Procedure for lost key".
- Insert first key in ignition lock and switch on ignition.
- Connect VAG1551 scan tool and initiate OBD of the anti-theft immobilizer using address word "17".
After control module identification is displayed:
- Press -> button.
Indicated on display
Rapid data transfer HELP
Select function XX
- Perform login procedure for instrument cluster.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -1- and -0-. This selects "Adaptation", function 10.
Indicated on display
Rapid data transfer Q
10 - Adaptation
- Press -Q- button to confirm input.
Indicated on display
Adaptation
Insert channel number XX
- Press buttons -2- and -1-. This selects the channel for adapting keys, -21-.
- Press -Q- button to confirm input.
If displayed:
Function is unknown or ->
cannot be carried out at the moment
- Repeat adaptation with entry of secret number.
Indicated on display
Channel 21 Adaptation 2 ->
<-1 3->
The upper line indicates that 2 ignition keys are adapted to the system.
NOTE: The number of keys to be adapted can also be entered via button 1 (decrease number) and button 3 (increase number).
- Press -> button.
Indicated on display
Channel 21 Adaptation 2 ->
Input adaptation value XXXXX
- Press the -0- button four times and then the total number of keys to be adapted, including the key that is in the ignition (e.g. 00004), max. 8 keys possible.
- Press -Q- button to confirm input.
Indicated on display for 4 keys to be adapted:
Channel 21 Adaptation 4 Q
<-1 3->
- Press -Q- button to confirm input.
Indicated on display
Channel 21 Adaptation 4 Q
Store changed value?
NOTE: No single key must require more than 30 seconds during adaptation, otherwise the warning lamp will blink with a frequency of 2 Hz and adaptation must be performed again in its entirety (login procedure and adaptation).
- Press -Q- button to confirm input.
Indicated on display
Channel 21 Adaptation 4 ->
Changed value is stored
Warning lamp in instrument cluster goes out, key in ignition is now adapted.
- Press -> button.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -6-. This selects "End Output", function 06.
Indicated on display
Rapid data transfer Q
06 End Output
- Press -Q- button to confirm input.
Indicated on display
Rapid data transfer HELP
Insert address word XX
- Insert next key in ignition lock and switch on ignition. Warning lamp lights up when ignition is switched on and goes out after approx. one second. This key is also adapted now.
- Repeat procedure until all keys have been adapted. After the last key, the warning light will go out approx. 2 seconds after successful adaptation and a short confirmation signal will be given (0.5 seconds light off, 0.5 seconds light on, light off).
- During adaptation of vehicle keys, the fixed code of each key (transponder) is adapted to the immobilizer. Furthermore, the computational rule for the variable code is written into each key and locked. After that keys can only be adapted for immobilizer III if they have the correct variable code (key has already been adapted to the system) or if they have not yet been locked (replacement part key). Adapted vehicle keys can not be used in conjunction with a different immobilizer system.
- Select "Check DTC memory", function 02. If there are no DTCs stored, then the function "Adapting keys" has been completed successfully.
Adaptation of ignition keys is automatically terminated if:
- The number of keys to be adapted has been reached.
- The ignition is switched on using a key that is already adapted and remains switched on for more than one second (DTC stored).
- The allotted adaptation time of 30 seconds per key, after ignition is switched on, is exceeded (DTC stored).
- A DTC is stored during key adaptation.