Comfort Access
66 04 04 (093)
Comfort Access
E60, E61, E63, E64, E70, E81, E87, E90, E91, E92, E93
Introduction
The BMW 1-Series, 3-Series and X5 can be equipped with option 322 "Comfort Access".
This comfort system has been derived from the BMW 7-Series.
From 09/2005, Comfort Access will also be introduced to the BMW 5-Series and BMW 6-Series. The system has been taken from the BMW 3-Series, albeit with a few modifications.
With Comfort Access, an ID transmitter is needed instead of the usual remote control. The ID transmitter also performs standard remote control functions.
Comfort Access can be used to carry out the following functions:
- Passive Entry
Opening the vehicle or luggage compartment without actively using the ID transmitter
- Passive Go
Engine start without actively using the ID transmitter
- Passive Exit
Closing the vehicle without actively using the ID transmitter
Comfort Access prevents an ID transmitter being disabled accidentally.
The CAS control unit is the master control unit for all functions carried out via Comfort Access. Vehicles with Comfort Access are fitted with a CA control unit.
> - E60, E61, E63, E64 [system overview ...]
> - E70 [system overview ...]
> - E81, E87, E90, E91, E92, E93 [system overview ...]
New or modified features on E90, E91, E92 compared to E81, E87, E93:
- The detection range of the interior aerials has been modified as a consequence of the different vehicle design.
- The remote control (FBD) receiver is integrated into the aerial amplifier. (> E81, E87, E93: FBD receiver integrated in interior mirror)
New or modified for the E60, E61, E63, E64:
- The outside door handle electronics is on the reverse of the door handle mounting bracket.
- The CA control unit is installed in the carrier behind the glove compartment.
Brief description of components
The following components are described for Comfort Access:
- Interior and exterior aerials
Different aerials are required for communication with the ID transmitter: Interior and exterior aerials
The number of aerials depends on the model concerned:
The aerials emit 125 kHz radio signals which are evaluated by the ID transmitter.
- Outside door handle electronics
The number of outside door handle electronic units depends on the model concerned (see table above).
The 3 sensors in the outside door handle electronics send the following signals to the CAS control unit and the CA control unit:
- Unlock: When a hand reaches into the handle recess via capacitive sensor 1
- Unlock: When a hand pulls on the outside door handle via tension sensor (redundant to capacitive sensor 1)
- Locking and deadlocking: On contact with the sensitive area of the door handle via capacitive sensor 2
A built-in aerial also sends radio signals in order to check for an ID transmitter located on the outside of the driver's door or front-passenger door.
> E70, E81, E87, E90, E91, E92, E93
The outside door handle electronics are installed in the outside door handle.
> E60, E61, E63, E64
The outside door handle electronics are behind the grip recess plate.
- ID transmitter
The ID transmitter evaluates the signals from the aerials. It also sends high-frequency radio signals to the FBD receiver.
Inserting the ID transmitter into the slot deactivates all Comfort Access functions.
- Remote control receiver for remote control services
> E64, E81, E87, E93
The remote control receiver is integrated in the interior mirror.
> E60, E61, E63, E70, E90, E91, E92
The remote control receiver is integrated into the aerial amplifier.
The remote control (FBD) receiver picks up radio signals from the ID transmitter and forwards them to the CAS control unit. The Comfort Access control unit (CA control unit) activates the FBD receiver.
- CAS control unit
The CAS control unit (CAS: Car Access System) 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 slot for the ID transmitter. The electronic steering lock is also activated by the CAS control unit.
The CAS control unit is connected with the following components via the K-bus (sub-bus):
- Outside door handle electronics (number depends on model concerned)
- Comfort Access control unit (CA control unit)
- Electronic steering lock
When the vehicle is idle, communication may take place on the K-bus without waking up the vehicle.
- START/STOP button
The START/STOP button can be used to switch the terminals in sequence (0, R, 15, R, 0). The engine can be started by depressing the clutch or the brake (manual transmission/automatic transmission) and pressing the START-STOP button.
- Slot for the ID transmitter/remote control
- On vehicles without Comfort Access:
In order to start the engine, the remote control must be latched in place in the slot.
- On vehicles with Comfort Access:
The remote control must be inserted into the slot if the battery in the ID transmitter is discharged. The engine can then be started up.
Inserting the ID transmitter into the slot deactivates Comfort Access.
- JBE: Junction box electronics
> E70, E81, E87, E90, E91, E92, E93
The junction box electronics activates the central locking system.
If the CAS control unit approves the unlocking of the vehicle, for example, the doors will be unlocked.
- KGM and KBM: Body gateway module and body basic module
> E60, E61, E63, E64
The body gateway module actuates the central locking in the front doors.
The body basic module controls the central locking in the rear doors.
If the CAS control unit approves the unlocking of the vehicle, for example, the doors will be unlocked.
- Comfort Access control unit
The Comfort Access control unit (CA control unit) actuates the internal and exterior aerials.
An ID transmitter scan is carried out. At the same time, the FBD receiver is activated for any ID transmitters which may respond.
> E60, E61, E63, E64
> E70
> E81, E87, E90, E91, E92, E93
System functions
Comfort Access is used to implement the following functions:
- Passive Entry via driver's door or front passenger door
- Passive Entry via tailgate
- Passive Go
- Passive Exit
- Disabling an ID transmitter located inside the vehicle
- Disabling an opposing command
- Tamperproof lock
Passive Entry via doors
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.
First, the user is authenticated (= authenticity check).
The data transferred during the authenticity check is of course encrypted.
If the ID transmitter authenticity check is successful, the user will be granted access to the vehicle. The central locking is unlocked. The door can be opened.
The same principle is applied for the authenticity check for Passive Entry and Passive Go.
Authenticity check using the example of Passive Entry:
- Trigger signal at outside door handle electronics via capacitive sensor 1.
- Request sent to outside door handle electronics to locate an ID transmitter via the aerials in the outside door handle. All ID transmitters associated with the vehicle and located outside of it are included in the search (low-frequency radio signal at 125 kHz).
The search determines whether an ID transmitter associated with the vehicle is located in the operating range of the aerials in the outside door handle.
- At the same time, the outside door handle electronics send a message to the CAS control unit via the sub bus (K-bus).
- All ID transmitters located register with the CAS control unit by sending a radio signal via the FBD receiver (high-frequency radio signal, country-specific, e.g. 868 MHz).
- The CAS control unit decides which of the registered ID transmitters will be used for the subsequent authenticity check.
- This selection is sent to the outside door handle electronics in a message via the K-bus. At the same time, a request is sent to the outside door handle electronics to carry out a selective scan of the ID transmitter concerned.
- All ID transmitters not picked up in this scan end reception readiness for the communication operation currently in progress.
- The ID transmitter picked up via the selective scan responds by sending a radio signal to the CAS control unit via the FBD receiver (high-frequency radio signal at 868 MHz).
- The CAS control unit evaluates the response signal and, if confirmation is valid, authorises Passive Entry.
The vehicle is unlocked.
In order that the vehicle can be opened quickly, the door lock is mechanically pretensioned with a spring. The spring ensures that the door unlocks whenever the user pulls the outside door handle to its full extent.
- The tension sensor is set up with redundancy to the capacitive sensor (e.g. capacitive sensor 1 deactivated due to long-term lack of use).
When the tension sensor detects the "Outside door handle pulled" signal, the door is unlocked. The door can be opened by pulling on the outside door handle again.
Passive Entry via the tailgate or front rear window
Comfort Access can be used to open the tailgate without actively using the ID transmitter. Condition: The ID transmitter must be located no further than 1.5 m from the aerial. Ideally, the user should carry the ID transmitter in a pocket.
To open the tailgate, it is necessary to press and hold the tailgate button for approximately 500 ms (top half of BMW logo on the E81, E87, grip on all other vehicles). If an ID transmitter is located in the vicinity of the luggage compartment, the tailgate will open.
If an ID transmitter is located inside the luggage compartment when the tailgate is closed (and there are no authorised ID sensors outside the vehicle), the tailgate will open up again.
The user's attention is drawn to the anti-theft alarm as follows:
- Visual signal via turn signal lights
- Acoustic signal via siren, US version only
> E61, E91: rear window
To open the rear window, the rear window button must be pressed for approx. 500 ms (under the rear window wiper arm).
If an ID transmitter is located in the vicinity of the rear of the vehicle, the rear window will open.
If an ID transmitter is located inside the luggage compartment when the rear window is closed (and there are no authorised ID sensors outside the vehicle), the rear window will open again.
The user's attention is drawn to this as follows: Visual signal via indicators and acoustic signal via sirens (on anti-theft alarm system).
Passive Go
In order to switch the terminal and/or start up the engine, the ID transmitter must simply be located inside the vehicle (not necessarily in the slot).
On the following models, the luggage compartment counts as part of the interior: E61, E70, E81, E87, E91.
On all other models, it is not possible to start the engine if an ID transmitter is detected in the luggage compartment.
In principle, the authenticity check required is the same as that for Passive Entry (except that it is run via the interior aerials).
If there are no ID transmitters inside the vehicle when the START-STOP button is pressed: Check-Control message on instrument cluster.
Press the START/STOP button to switch the terminals. The terminal switching sequence is as follows: 0 -> terminal R -> terminal 15 -> terminal R -> 0.
The START/STOP button must be pressed for approximately 500 ms in order to start up the engine. The clutch pedal or brake pedal (manual transmission or automatic transmission respectively) must be depressed at the same time.
The engine may be started up in any terminal position.
Once the engine has been switched off, it may be restarted within 5 seconds even if no ID transmitter is detected inside the vehicle (i.e. no valid drive authorisation). This safety measure is required for possible emergencies.
Passive Exit
The sensitive area on the outside door handle must be touched (depends on model concerned) for the vehicle to be locked and then secured. Your hand must touch the middle of the sensitive area for at least 1 second.
If the locking area is touched for approx. 3 seconds, auto-remote closing will start. The side windows and sliding/tilting sunroof or Panorama glass sunroof on the E61/E91 then close. On the E64, the convertible top closes. If applicable, the exterior mirrors are folded in.
Auto-remote opening via the outside door handle is not possible.
Terminal R is deactivated when the outside door handle is locked.
Terminal 15 is not deactivated when the vehicle is locked. A Check-Control message appears as a warning when the driver's door is opened with terminal 15 ON.
Special feature: Comfort Access allows the vehicle to be locked whilst the engine is running.
> E93
Note: No convenience closing of the hardtop via the exterior door handle electronics.
It is not possible to close the hardtop via the exterior door handle electronics. Convenience closing is performed at the lock cylinder.
Disabling an ID transmitter located inside the vehicle
When the vehicle is closed via the outside door handle, any ID transmitter inside the vehicle will be detected.
This ID transmitter is disabled for all Comfort Access functions. However, it is still possible to access the luggage compartment. The ID transmitter is reactivated when the vehicle is unlocked again.
Disabling an opposing command
When the vehicle is unlocked via the outside door handle, it cannot be locked again for approx. 2 seconds.
Similarly, when the vehicle is locked via the outside door handle, it cannot be unlocked again for approximately 2 seconds.
This allows the user to pull on the outside door handle to check that the vehicle is actually locked.
Tamperproof lock
The vehicle may only be locked and unlocked consecutively a maximum of 8 times. After this, the tamperproof lock is activated.
Operation is disabled for 10 seconds. The tamperproof lock is deactivated completely after 5 minutes. Once again, the vehicle may then only be locked and unlocked consecutively a maximum of 8 times.
Notes for service staff
Service staff should note the following points:
- General note:
- Diagnosis:
- Encoding/programming: ---
- Personal Profile
Almost all functions of the Car and Key Memory are programmed inside the vehicle itself
(please refer to the "Personal profile" section of Owner's Handbook: individual settings for a maximum of 3 remote control units via the display in the instrument cluster or via the Central Information Display)
National versions
The following details are available with regard to national versions:
> E93
Convenience functions performed using the remote control or ID transmitter depend on the national version concerned.
Conditions for operating Comfort Access (option 322) with the remote control or ID transmitter
Subject to change.