Redundant Data Storage

Redundant Data Storage

The CAS is one of three control units in the E65/E66 to store important vehicle specific data.

The CAS is responsible for storing:

- The full 17 digit VIN Number (Only the last 7 digits are stored in all codeable modules)
- Vehicle Order (FA)
- Total mileage
- CBS (Conditioned Based Service) Data

Redundantly, the full 17 digit VIN and the Vehicle Order (FA) are stored in the LM and the mileage is stored in the KOMBI. CBS data is stored in the Remote Controls

Vehicle Order

The Vehicle Order (FA-Fahzeugauftrag) replaces the central coding code (ZCS) used up until now. The Vehicle Order describes the current status of a vehicle (following production and in case of a change in the vehicle equipment).

The Vehicle Order is formed for each vehicle individually from the factory assembly order. The length of the vehicle order varies depending on the amount of vehicle equipment.

During first initialization at the factory, the Vehicle Order is entered into the CAS. It is also stored redundantly in the LM (Lamp Module). If the CAS is replaced or retrofitted in the workshop, the Vehicle Order must be re-entered or added to the CAS control unit.

Content of the Vehicle Order:

- Vehicle Identification Number (full 17 digit VIN)
- Series (E65/E66)
- Model key (Digits 4-7 of the VIN)
- Time criterion (Production date: MM/YY)
- Paint code (4 digit paint code)
- Upholstery code (4 digit code)
- Assembly Number (ZusBau: prog. part # for powertrain)
- E word (Additions to the standard series not in the SA)
- HO word (center installed options using 3 digit option codes: not used yet)
- Special-equipment codes (3 digit SAs, up to 100 possible entries)

The FA may be read out and printed using the E65/E66 programming software (CIP). Any options installed at the BMW center will be able to be registered and input using the FA editor function.

CBS (Condition Based Service) Data

The CBS (Condition Based Service) data are saved in:

- Remote controls (key)
- The EEPROM of the CAS
- Kombi

The CAS reads the data from the vehicle electrical system (DME (ECM),DSC, KOMBI etc..). If terminal 15 is switched off, the CAS saves the data into the remote control.

Vehicle Mileage Storage




To prevent the vehicle-specific data from being lost when the instrument cluster is replaced, they are stored redundantly in the CAS. Mileage is only transferred from the KOMBI to the CAS when the stored VINs match.