Codes for programming TT locking system
These functions are enabeled / disabeled by adding / deleting the following numbers from the "Base code" of the car.
| Value | function |
| +64 | add window up and window down with remote. Button on keyfob needs to be held down to activate. |
| -04 | add 1 touch unlock of both doors. Removeing this unlocks the drivers door withthe first press, and the passenger door onthe 2nd press of the unlock button. |
| -1024 | remove horn honk when arming |
| +32 | autolock/unlock of doors (doors lock at 15mph and unlock when key is removed) |
Base codes (that I know of)
My 2001 UK spec 225TTC, with no horn on alarm arming, no auto-lock and 1-touch unlocking: 6858
Operation of "Auto-Lock" feature.
When you first reach 15mph after the ignition is first turned on, both doors will automatically lock.
If one, or both, door(s) is unlocked after they have been auto-locked, and the ignition has not been turned off... they will NOT auto-lock again.
When the ignition is turned off, and the key removed from the lock, both doors will automatically unlock. If however, you do not have "1 touch unlock" enabeled (i.e. only the drivers door is unlocked on the first press) then only the door that was automatically locked will unlock.
To help people work out what their current code does, and what the new code needs to be for additional features they want, I've written a small VisualBasic App that does all the hard work for you!
If you wasnt to down load the application, you can do from here
The app requires the Microsoft Visual Basic 6.0 Runtime files which can be downloaded direct from Microsoft here.
Warning / disclaimer!
Messing around with the codes of your car could result in your car being damaged / failing etc. I take no responsibility for any damage that happens to your car. To the best of my knowledge these codes are correct as of this time (Oct 2002).