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Car Access System: Notes

The CAS of the E60 is based on the CAS of the E65. The internal designation is CAS 2.

The following changes have been made compared with the CAS of the E65:

Direct connection to the K-CAN
Repeater function has been omitted
Ignition starter switch and the CAS are 2 separate components
Data transfer as part of the Condition Based Service

Fig 1: Identifying Car Access System
Courtesy of BMW OF NORTH AMERICA, INC.

The CAS includes the following functions:

Reading in ignition starter switch (ZAS)
Transponder authentication
Terminal control
Electronic immobilizer enable to injection system
Master function for central locking system (ZV)
Master function for power windows (FH) and slide/tilt sunroof (SHD)
Remote control services (FBD)
Internal CAS functions
- Wake-up signals
- Sleep signals
Vehicle functions
- Personalization
- Auto encoding of vehicle model/transmitter
- Vehicle order
- Total distance recorder
- Condition Based Service CBS
- Voltage supply, brake-light switch