Keyless Go ----> Keys Locked in Car

[KDD]

Anyone every experience this?

My wife yesterday was using my car while I was at work with her GL550. She put her car keys to the X5 in her shoulder bag and put the bag in the backseat of the car. The car did recognize the keys in her bag and unlocked as soon as she grabbed the rear door handle. As soon as she closed the door, the doors locked by themselves. She dosent recall closing the door by the door handle which has the little sensor for locking the doors but Im suspecting thats what happened. Nonetheless... the car is supposed to reconginze if the keys are in the car and not lock from the outside. Has this happened to anyone?

[alexmish]

I've read a post by someone couple of years ago when same thing happened...also the keys were in the bag on rear seat...

I have CA as well, but always keep the keys in my pocket, never in the bag.

[FunfDreisig]

I recently posted this on a thread on BimmerFest where others have had a similar problem. This is how Comfort Access is supposed to work.

"Unlocking Sequence
The capacitive sensor 1 in the outside door handle electronics module recognizes that the handle has been grasped and activates the transmit antenna. The transmit antenna sends a 125 kHz signal to the ID transmitter. The signal contains the authentication
request.

The ID transmitter sends a high-frequency signal of 868 MHz to the remote control receiver to obtain authentication.

The Car Access System 3 checks the authentication of the ID transmitter.

Following successful authentication, the Car Access System 3 issues an approval to unlock the vehicle and initiates the vehicle unlocking procedure.

The junction box control unit executes the unlocking procedure.

Passive Entry for UpperTailgate
An authentication check also takes place before opening the upper tailgate. The junction box control unit evaluates the status of the outside tailgate button. Pressing the outside tailgate button changes its status.

The change in status is transmitted via the K-CAN.

The Comfort Access control unit prompts the ID transmitter to register and obtain authentication from the vehicle. This prompt is sent by the antenna in the rear of the vehicle.

After successful authentication, the tailgate can be unlocked and opened with the outside tailgate button.

Passive Go
The Passive Go function makes it possible to start the vehicle without the ID transmitter inserted in its holder.

Issuing Start Enable
Authorization to start the engine is only given when there is an ID transmitter in the vehicle.
Three seconds after the door has been opened the Car Access System 3 begins its search for a valid ID transmitter. The Car Access System 3 requests the Comfort Access control unit to prompt for identification of a valid ID transmitter.

The Comfort Access control unit sends the request via the interior antennas.

The ID transmitter responds using a high frequency range (868 MHz). If the ID transmitter is authenticated, the Car Access System 3 grants permission for the engine to be started.

Note: The electronic immobilizer gives its own approval for the engine to be started. This approval can only come when terminal 15 is selected.

Passive Exit
The Passive Exit function makes it possible to lock the vehicle without actively using the ID transmitter.

Locking Procedure
After the vehicle door has been closed, the locking procedure is started by touching the sensitive area on the outside door handle. The outside door handle electronics module sends the request to unlock the vehicle via the CAS bus to the Comfort Access system.
Comfort Access checks via the outside antennas whether there is a valid ID transmitter in the vicinity of the outside door handle (transmission range of the outside door handle antennas).

The ID transmitter is instructed to send an authentication signal.
In turn, the identification sensor sends encrypted data via the high-frequency link to the remote control receiver.

The Car Access System 3 checks whether the ID transmitter is valid.
On successful completion of the check, the Car Access System 3 issues the enable to engage the central locking drive and initiates locking.
The junction box control unit activates the central locking drive units.

Special Functions
The Comfort Access additionally features the special functions described in the following that are determined by the actions of the vehicle user.

Two ID transmitters Remain Inside the Vehicle
Using the interior antennas, the Car Access System 3 detects whether there is a valid ID transmitter in the vehicle.

If the Car Access System 3 detects a valid ID transmitter in the vehicle interior and the vehicle is locked by means of another valid ID transmitter (located outside), the ID transmitter located in the vehicle interior is set to "invalid".

For Comfort Access purposes, this ID transmitter is considered as no longer belonging to the vehicle until the vehicle is unlocked again.

Note: The "invalid" status only applies to the functions of Comfort Access. The remote control functions are still available.

The ID Transmitter Inside the Luggage Compartment
On closing the tailgate, if an ID transmitter is located either in the luggage compartment or the vehicle interior when the vehicle is locked, the tailgate is immediately reopened automatically. An audible and visual signal draws the customer's attention to the fact that the ID transmitter has been left in the luggage compartment or vehicle interior.

The Comfort Access control unit starts searching, prompted by the Car Access System 3, using the vehicle interior antennas and luggage compartment antennas.

If a valid ID transmitter is detected, the Car Access System 3 will not issue the enable for locking the tailgate.

The tailgate cannot be closed before the ID transmitter has been removed and is located outside the vehicle interior or luggage compartment.

Note: The tailgate can only be reopened when Comfort Access cannot find a valid ID transmitter in the vicinity of the vehicle."

Funf Dreisg

[FunfDreisig]

FWIW both instances I've read about being locked out by Comfort Access (including the one described by the OP) involved the key being in a purse placed inside the vehicle and when the door was closed the X5 was locked with the key inside. AND in both cases, the door being unlocked and locked was NOT the driver's door.

Note: Without Comfort Access the only way you can unlock a passenger door is to have previously (or simultaneously) unlocked the driver door.

Funf Dreisig

[panbob]

hey btw, which one do you like better GL550 or 4.8?

I have a GL550 but every day I consider going back to BMW. very confused...

[omasou]

FYI. I recently learned that if the keys are too close to a comfort access enable car the car will not sleep and the battery will drain.

[BigBlueX5]

Does anyone know what the range is for Comfort Access and key detection?

[XXX555]

Originally Posted by BigBlueX5

Does anyone know what the range is for Comfort Access and key detection?

Prob. similar to the distance your cellphone bluetooth disconnects from the X5.



As far as being locked out, my CA put the 1-888 bmw assist phone number in my cellphone for when/if I get locked out, they can unlock it remotely.