12
lmportant information on Programming
Security code
If the immobilizer and engine control unit are replaced at the same time, the immobilizer control unit must be
programmed first before the “IMMOBILIZER” function in the engine control unit can be activated.
The security code protects the immobilizer control unit against unauthorized programming and data access from
Tech 2. The security code consists of a 4 digit code number and is programmed into the immobilizer control unit
and ECM (Engine Control Module; Gas Engine only).
New control units are not programmed with a security code. If the control units are replaced, the security code
entered in the car pass, transponder lD, etc. must be programmed into the new control unit with Tech 2.
The security code can only be programmed with Tech 2 once and must therefore be performed with great care.
Once programmed, the security code cannot be overwritten.
An already used immobilizer can be reused in a different car by initializing the immobilizer.
After that you can program the security code again. For initializing command you need the current security code.
If the immobilizer control unit is returned (e.g. warranty cases), always enclose the security code that is allocated to
that control unit. If this is not done, we can not process the case and the warranty will not be recognized.
1. Entering a code
If the Tech 2 display requests the
security code
mechanical key number
Vehicle Identification No.
to be entered, process as follows;
To input a digit you need to use the up and down buttons of the Tech 2. By using the numeric buttons, the
according digit will be displayed at the current position and the cursor will move to the next position.
For letters you need to use the up and down buttons of the Tech 2. The up and down key might be used for
digits as well. By using the up and down buttons, the displayed digit or letter will be increased or decreased. To
move to the next position you need to use the move-to-right-button.
With the two buttons, move-to-right and move-to-left you can select the position of number you want to change.
This will allow you to correct a wrong number.
After the number is completed you need to press the Enter button to accept the number.
Correction is now no longer possible.
Use the OKAY soft key to program the number and the NOT OKAY soft key to abort the programming.
