Marquardt DC10, DC11 User Manual
Functional description
Annex No.5
Page 1 of 11
Technical Description
Remote control vehicle key
BR166
PN: B3333D (Basis)
PN: K3333D (Keyless Go)
Vehicle Key BR166 – technical Description
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form 659.02
1.1 Operation of BASIC Key
1.1.1 Access permission with BASIC Key
The locking and drive permission system BR166 (3333.4/5) incorporates a function which enables the
locking and unlocking of the doors. There are two separate buttons each one for lock and unlock the vehicle.
All vehicles with a boot lid are equipped with a third button for unlocking the boot lid.
The key is provided with a fourth button to activate the “PANIC” function for vehicles intended for the US
market.
The function is activated by pushing a button, the method of button pushing determines the function
activated on the vehicle, e.g. prolonged pressure on the button initiates an IR comfort function.
If messages are discharged from the key, the access permission information is sent via radio waves (HF)
and redundantly via infrared (IR) from the key to the vehicle. The so-called comfort signals are special
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Proprietary data, company confidential. All rights reserved.
Confié à titre de secret d'entreprise. Tous droits réservés.
Comunicado como segredo empresarial. Reservados todos os direitos.
Confidado como secreto industrial. Nos reservamos todos los derechos.
functions which require visual contact with the vehicle. Upon pressing the button for an extended period,
these signals are sent via IR signal only after the standard access permission message.
HF communication via 3-channel operation:
The access permission message is sent sequentially on 3 radio channels adjacent to one another within the
permissible ISM band. The radio receiver installed within the vehicle is able to receive the message
discharged from the key on all 3 channels, evaluate it and send an appropriate control message to the
central locking system.
1.1.2 Drive permission with BASIC Key
After the key is pushed into the EZS (electronic ignition switch) a cryptographically, bidirectional
communication by infrared light is initiated. As there is a successful authorization of the key the engine of the
vehicle can be started.
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1.2 Operation of KEYLESS GO Key
The KEYLESS Go key model is equipped with all of the BASIC model functions.
Additional the KEYLESS GO model only facilitates full utilisation of the drive permission system function on
the vehicle without active operation of the key. This means that one can lock and unlock the vehicle (access
permission) without operating the key and activate and deactivate the immobiliser (drive permission) without
placing the key in the ignition switch. It is only necessary to carry the key in order to be identified as an
authorised vehicle user.
In addition to the basic variant, the keyless go key is expanded to include an LF receiver component,
comprising of inductive antennae which create the three spatial directions x, y and z, and an associated LF
receiver ASIC. Additionally, the keyless go variant of the key is equipped with a special HF ASIC, which
facilitates bidirectional HF communication.
MARQUARDT GmbH
Schloßstraße 16
D 78604 Rietheim – Weilheim
First Draft 23.10.2009 Version 1.02
Department APDA1-RI File
Editor U. Schwalm Doc.-No.
Date 25.02.2010 Page Page2 von 10
Vehicle Key BR166 – technical Description
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.
.
form 659.02
1.2.1 Access permission with keyless entry
The keyless access permission (keyless entry) is initiated by the vehicle user activating the vehicle door
handle. This causes the vehicle to send an inductive wake up message. On receiving this, the key starts in
active mode.
The vehicle now sends further unmodulated, inductive fields which enable the key to ascertain its position in
relation to the vehicle on the basis of field strength measurements.
Bidirectional HF communication follows, in which cryptographically encrypted authentication data is
transferred between the key and the vehicle.
If the key is outside the vehicle, the vehicle is locked or unlocked following transferral of the correct data.
1.2.2 Drive permission with keyless go
In principle, when activating the start/stop button for a keyless engine start, the same process runs as that
described for access permission of the BASIC model. The difference here is that the key must be located
.
Proprietary data, company confidential. All rights reserved.
Confié à titre de secret d'entreprise. Tous droits réservés.
Comunicado como segredo empresarial. Reservados todos os direitos.
Confidado como secreto industrial. Nos reservamos todos los derechos.
inside the vehicle, but needs not to push into the EZS (electronic ignition switch).
The presence of the key inside the vehicle is verified on every 5km driven, and on driving away. The
process that runs here is similar to the engine start process, although shorter.
The cryptographically encrypted authentication between key and vehicle is accomplished by a bidirectional
RF communication.
1.2.3 LF / HF transferral
The inductive wake-up message is sent in a phase-modulated (PSK) format through the vehicle on the
frequency 21.845 kHz with a data rate of 5.461 kBd.
With respect to bidirectional HF communications, these are processed in a frequency-modulated (FSK)
format, in the ISM band on 433.92 MHz in Europe and 315 MHz in the USA. The rate of data transferral is 10
kBd.
.
Weitergabe sowie Vervielfältigung dieser Unterlage, Ver-wertung und Mitteilung ihres Inhalts nicht gestattet, soweit
nicht ausdrücklich zugestanden. Zuwiderhandlungen ver-pflichten zu Schadenersatz. Alle Rechte vorbehalten, insbe-sondere für den Fall der Patenterteilung oder GM-Eintragung
1.2.4 Operating frequencies of HF transferral
1.2.5 1-channel
In 1-channel operation, the mid-frequency of the channel is:
ECE: 433.92 MHz
USA, Japan: 315.00 MHz
MARQUARDT GmbH
Schloßstraße 16
D 78 604 Rietheim – Weilheim
First Draft 23.10.2009 Version 1.02
Department APDA1-RI File
Editor U. Schwalm Doc.-No.
Date 25.02.2010 Page Page3 von 10
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