GF80.61-P-2009RT Unlocking, Function

GF80.61-P-2009RT Unlocking, Function
- with CODE (889) Keyless Go

Component Identification:

Function
The Keyless Go system (KG) searches for and wakes up the transmitter key. Then the drive authorization data is exchanged over the RF path and the corresponding accesses are checked if necessary.

Function requirements
^ Circuit 30
^ At least one transmitter key is outside the vehicle (max. distance from door handle approx. 1 m).
^ Circuit 15C OFF (= no transmitter key in EIS control unit).

Possible system activation
^ Pulling door handle
^ Actuating rear-end door handle switch (S88/9)

Function sequence for door handle control point
The capacitive sensor in the door handle recognizes when the corresponding door handle is touched and sends a message to the Keyless Go control unit thereby waking up the door Keyless Go system (KG).
Moreover, the Keyless Go control unit causes the Keyless Go transmitter key to transmit its authorization via the left rear door Keyless Go inductive antenna.

This access authorization is received by the roof antenna module and is relayed to the Keyless Go control unit. The Keyless Go control unit transmits this message to EIS control unit via the CAN-B bus
The EIS control unit checks the access authorization; after positive check, it transmits the "Unlocking" command via the CAN-B bus. If a door handle is now pulled within 0.5 s, the Hall sensor in the door recognizes this and the Keyless Go control unit activates the servo motor of this door.

All door locks are equipped with a servo motor to accelerate unlocking. This motor is directly actuated by the Keyless Go control unit to open to rotary tumbler. The CL motors are responsible for opening the doors.

The actuation of the central locking depends on the adjustment of the transmitter key

Possible settings:
^ Globally unlocking CL
^ Selectively unlocking CL
^ Driver door control point: selective unlocking
^ Passenger door control point or rear door: global unlocking

A button for pressing is located on the corresponding outer side of the door handle; the vehicle is locked or convenience closed with this button. A capacitive sensor with which the vehicle is unlocked in the event of contact, is located on the inside of each door handle Each door handle is read in by the Keyless Go control unit with two lines.

Globally and selectively unlocking
With the global setting the vehicle is unlocked completely. With the selective setting only the driver door and the tank flap are unlocked.. This setting is performed by the transmitter key.

Function sequence for rear-end door handle control point
When the rear-end door handle switch is actuated, the rear SAM control unit recognizes the request and relays the message to the CAN-B bus to the Keyless Go system (KG). Then, the Keyless Go control unit requests the Keyless Go transmitter key to transmit its authorization via the Keyless Go trunk antenna. This authorization is relayed to the Keyless Go control unit by the roof antenna module. The Keyless Go control unit transmits the message to the EIS control unit, it checks the access authorization and transmits the "Unlocking" command via CAN-B bus. The further function sequence corresponds to the function of the door handle control unit.