Continental Automotive Technologies 5WK48903 Transmitter User Manual Users manual
Continental Automotive GmbH Transmitter Users manual
Users manual
Annex No.5
Page 1 of 5
Functional Description
Key: 5WK4 8903
SIEMENS AG SV C BC P2
Siemens VDO Automotive
FCC ID:KR55WK48903 IC:267T-5WK48903
I:\POSTZULA\NISSAN\D-PF_I-Key\Technische_Doku_doc\Functional_Description_DPF-I-Key.doc Page 1 of 4
User Manual / Functional Description
of the
Siemens VDO
Radio Frequency Transmitter
Type
5WK48902
5WK48903
5WK48906
SIEMENS AG SV C BC P2
Siemens VDO Automotive
FCC ID:KR55WK48903 IC:267T-5WK48903
I:\POSTZULA\NISSAN\D-PF_I-Key\Technische_Doku_doc\Functional_Description_DPF-I-Key.doc Page 2 of 4
Functional description of Nissan D – Plateform i – key
This document gives an overview of the operation modes and resulting RF transmissions of the
key. In this document the device is referenced as "key", even if the mechanical backup key might
be separated form it.
For an overview of the electrical function blocks, please see the document "Block diagram of
Nissan D – Plateform i – key".
Operating modes
The key has three main operating modes which differ in the regard of signals transmitted on the
RF. As there is
• · Immobilizer transponder mode
• · Remote key functionality
• · Passive key functionality
Immobilizer Transponder mode
When the key is operating as an immobilizer transponder, communication is done over a "contact
less interface" depending on strong magn etic coupling. The transponder is the passive side of the
link and there is no RF transmission from it involved in any aspect.
Remote key functionality
This mode refers to the use of the key as a remote control to initiate actions on vehicle side such
as open or close door latches and such alike. RF transmission always depends on a user
activating a button on the key. Duration of the button press influences the amount of telegrams
sent on the RF channel.
Short Button press:
SIEMENS AG SV C BC P2
Siemens VDO Automotive
FCC ID:KR55WK48903 IC:267T-5WK48903
I:\POSTZULA\NISSAN\D-PF_I-Key\Technische_Doku_doc\Functional_Description_DPF-I-Key.doc Page 3 of 4
A valid but short button press, as indicated in the upper half of the above diagram, results in a
minimum number of RF telegrams to be sent. This is visualized in the lower half of the diagram.
Long button press:
If the button press duration extents the time required for sending the minimum amount of RF
telegrams, additional ones are transmitted until the button is released or a timeout of 25s is
reached. This timeout prevents unintended transmissions over extended time period s in case of a
stuck button.
Passive key functionality
For passive key operation no user action on key side is required. The trigger is delivered from the
vehicle via an LF data telegram. Upon reception of a valid LF message, the key responds with
two telegrams on RF side while the inter telegram timing in this mode depends on key
configuration data (sort of time slot concept).
RF parameters
For all RF transmission the following parameters apply:
US variant JP variant
Center frequency 315 MHz 314.85 MHz
Frequency accurracy ± 30 kHz ± 20 kHz
Frequency deviation ± 25 kHz nominal ± 25 kHz nominal
RF modulation FSK FSK
RF frame baudrate 2 kBd 2 kBd
Data coding Manchester Manchester
Variants
5WK48902 Japan Version 315 MHz LP
5WK48903 US Version 315 MHz
5WK48906 US Version 315 MHz, same as 5WK48903
SIEMENS AG SV C BC P2
Siemens VDO Automotive
FCC ID:KR55WK48903 IC:267T-5WK48903
I:\POSTZULA\NISSAN\D-PF_I-Key\Technische_Doku_doc\Functional_Description_DPF-I-Key.doc Page 4 of 4
only different Logo at device
Label Design
Siemens VDO
5WK48903
FCC ID:KR55WK48903
IC:267T-5WK48903
Warning Statement:
NOTE
This device complies with part 15 of the FCC Rules and RSS-210. Operation is
subject to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept interference received, including
interference that may cause undesired operation.
COUTION
Changes or modifications not expressly approved by the manufacturer could avoid the user's
authority to operate the equipment.