BMW E90 User Manual

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E90 General Vehicle Electrical
Passive Entry
Passive entry enables access to the vehicle without operating the Identification
Transmitter/Remote Control.
Note: The vehicle cannot be woken and opened without a valid ID transmitter
being present within a .5-1.5 m radius from a specific external antenna.
The vehicle in sleep mode is woken with the presence of a valid ID transmitter/remote
control and activation of the Comfort Access System is started by grasping the outer
door handle.
Unlocking
The capacitive sensor in the Electronic Outer Door Handle Module (TAGE) recognizes
that the handle has been grasped and activates the transmit antenna. The transmit
antenna sends a 125 kHz signal to the identification transmitter. In turn, the identification
transmitter sends a 315 MHz high frequency signal to the remote control receiver, which
contains the authentication request.
The CAS2 checks the authentication of the identification transmitter.
Following successful authentication, the CAS2 issues the enable signal to unlock the
vehicle and initiates the vehicle unlocking procedure. The JBE executes the unlocking
procedure.
Note: At this point the steering is not yet unlocked.
Opening Trunk Lid
An authentication check also takes place before opening the trunk lid, an identification
transmitter must be located within the rear area of the vehicle.
After successful authentication, the trunk lid can be unlocked and opened with the outer
trunk lid button.
Passive Go
The passive go function makes it possible to start the vehicle without the ID transmitter
being inserted in its holder.
Note: The vehicle cannot be started without a valid ID transmitter being located
in the interior of the vehicle.
Issuing Start Enable
After the door has been opened, the CAS2 starts the check after 3 s to establish whether
there is a valid ID transmitter in the vehicle. The CAS2 instructs the Comfort Access
control module to again send out the identifier for a valid ID transmitter.
The Comfort Access Module sends the request via the interior antennas.

BMW E90 Specifications

General

Display Type	LCD
Display Size	6.5 inches or 8.8 inches (optional)
Navigation System	Optional
Bluetooth	Optional (with phone pairing)
USB Port	Optional (depending on model year and options)
Auxiliary Input	Standard
CD Player	Standard
DVD Player	Optional (with navigation system)
iDrive System	Yes (version dependent on model year)