Car Access System 2 (CAS2)
As soon as the CAS2 receives a request signal it must verify if a valid ID Transmitter is located with range of the antenna. CAS2 requires that the antenna in the area of the request transmit a request for validation to the ID Transmitter.
The ID transmitter transmits a signal to the remote control receiver, which in turn forwards the signal to the CAS2 where the signal is checked to be valid and belonging to the vehicle. Only if the check/authentication, which takes a few milliseconds, is successful will the CAS2 forward the request to activate the specific function.
The CAS2, serves as the master control module for the central locking system, as it issues the enable signal to activate a lock/unlock function. An enable status signal is transmitted to the JBE from CAS2 via K-CAN.