7 Series E65 745i (N62) SAL
Various control units are involved in the system:
-
CAS: Car Access System
The CAS control unit is the master control unit for all Comfort Access functions. The CAS control unit is the
interface to the START/STOP button and to the insert compartment for the ID transmitter.
The CAS control unit is connected with the following components via the K-bus (sub-bus):
•
Electronic circuitry in the outside door handles of all 4 doors
•
Comfort Access (CA) control unit
When the vehicle is idle, communication may take place on the K-bus without waking up the vehicle.
At the same time, the CAS also communicates with the CA control unit on the K-CAN PERIPHERY.
The sub-bus is activated when a signal is triggered from an outside door handle. If identification is negative, the
sub-bus goes back into standby mode.
-
TMFA, TMBF, TMFAH, TMBFH: 4 door modules
The door modules control the central locking. If the CAS control unit approves the unlocking of the vehicle, for
example, the doors will be unlocked.
The Comfort Access sub-bus is simply looped through the door modules.
The "door handle pulled" signal is transmitted by the door module to the CAS control unit via the K-CAN
PERIPHERY.
-
CA: Comfort Access control unit
The Comfort Access (CA) control unit actuates the interior aerials and the two exterior aerials in the rear
bumper.
An ID transmitter scan is carried out. At the same time, the FBD receiver is activated for any ID transmitters
which may respond.
[more ...]
-
PM: Power module
The tailgate button for opening the tailgate is connected to the power module. The signal is sent to the CAS
control unit via the K-CAN PERIPHERY.
This means that the tailgate can also be opened individually.
System functions
Comfort Access is used to implement the following functions:
-
Passive Entry via door
-
Passive Entry via boot lid
-
Passive Go
-
Passive Exit
-
Disabling an ID transmitter located inside the vehicle
-
Disabling an opposing command
-
Tamper-proof lock
Passive Entry via door
The vehicle is unlocked when the outside door handle is gripped or pulled. Condition: The ID transmitter must be
located no further than 1.5 m from the aerial in the outside door handle.
Ideally, the user should carry the ID transmitter in a pocket.
SBT Comfort Access E65, E66
BMW AG - TIS
15.02.2013 14:37
Issue status (12/2007) Valid only until next DVD is issued
Copyright
Page - 3 -