Both at the factory and when any EWS components are replaced at a later date, the control units and the transponder must be initialized and synchronized. The following describes the typical sequences employed at the factory and at the dealer's service facility.
The EWS control unit and the 4 vehicle keys are initialized with key data generated at a programming station. Key data for an additional 6 keys, still uncut, are also entered into the EWS control unit. All key data (for a total of 10 keys) are stored in a data bank. The control unit's Individual Serial Number (ISN) is then read from the engine control unit and transferred to the EWS control unit. At this point the initialization process is complete and the vehicle is ready to drive.
Substitute keys are available only through a BMW dealer, who must order them through a regional distribution centre, where one of the 6 substitute keys will be programmed for operation with the vehicle. This key is not a replacement copy of the original, but rather anew substitute key!
Important!
The distribution centre always supplies a new substitute key! The maximum number of substitute keys that can be produced and supplied for use with any individual EWS control unit installed in a vehicle is 6! The key data for substitute keys are deleted from the data bank as soon as these keys are delivered!
The customer and dealer must provide all relevant information before the request for a substitute key can be processed at the distribution centre.
Caution!
Every request for substitute keys is documented to provide information to insurance companies and official agencies in the event of subsequent inquiries!
In the interests of increased security against theft, acquisition of substitute keys will be more difficult than in the past.
Starting with Key No. 5 (first substitute key), all substitute keys will receive a 'E ' on the webbing to provide supplementary identification.
The DIS tester can be used to cancel a key's authorization at the vehicle, as well as to restore it should a lost key be found again. All keys remaining in the customer's possession must then be presented.
For replacement, a pre-initialized EWS control unit must be acquired through the assigned distributor. The process is similar to that used to order substitute keys.
The new EWS control unit must then be encoded in the vehicle. This is done by entering the I ndividual S erialN umber (ISN) for the engine control unit (DME/DDE) in the EWS control unit. The encoding sequence must proceed as follows:
After the engine control unit is replaced, the DIS tester or MoDiC must be used to enter the code in the new unit. The I ndividual S erialN umber (ISN) stored in the new engine control unit is transferred to the EWS control unit at the same time.
No initialization procedures are required.
In addition to the assembly plants, the following distribution centres are equipped with programming stations for initializing EWS components:
These distribution centres can supply the following EWS 2 components as replacement parts:
Authorized customers can order a new EWS control unit and newly initialized transponder keys using the earlier mechanical key code upon providing all verification data.
If all 10 keys and all stored data are lost (also at the distribution centre), then both the EWS control unit and all keys must be replaced on the vehicle. These components are available together only from central parts distribution (ZTA), as they are not standard inventory items.