Continental Automotive Technologies 5WK49266 KEYLESS CAR ENTRY User Manual
Continental Automotive GmbH KEYLESS CAR ENTRY Users Manual
Users Manual

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49266                                                                        FCCID:KR55WK49266 
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 User Manual / Functional Description 
of the  
Siemens VDO 
 Radio Frequency Transmitter/Receiver 
Type 
 5WK49266  

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49266                                                                        FCCID:KR55WK49266 
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1. SYSTEM OVERVIEW 
 The RF remote control system consists of a remote key which is a RF 
transmitter / receiver and a RF transmitter / receiver unit at the vehicle. 
The Remote Key is used to transmit information for locking or unlocking  
the vehicle  (as also Trunk Lid/Approach Light/Panic /comfort open/Comfort 
Close/Check vehicle status/Passive lock/passive unlock/passive start 
operations)  by a bidirectional RF transmission line for normal remote 
operation by pressing a button. 
If the telegram which was received form the vehicle unit is not corrupted the 
vehicle unit will send an acknowledgement message to the Remote key. If 
the acknowledgement message is not received by the Remote key, the 
remote key will repeat the transmission at the second channel. 
The RF transmitter/ receiver is mechanically integrated in the head of the 
key.  
2. POWER SUPPLY 
 The transmitter is provided with 1 Lithium battery (CR 2430) that gives a 
tension of feeding of +3V.  
The battery inversion is protected mechanically. 
3. BUTTONS 
 All buttons are on the top side of the key housing. They are arranged in the 
following way. 

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49266                                                                        FCCID:KR55WK49266 
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4. BLOCK DIAGRAMM 
 The block diagram below shows the main electronic units of the transmitter 
/ receiver 
:   

Siemens VDO Automotive AG    SV C BC P2 RF 
 IC: 267T-5WK49266                                                                        FCCID:KR55WK49266 
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5. TECHNICAL DESCRIPTION 
 Carrier frequency (incl. Tolerance):  902, 16 MHz / 903,575 MHz 
Output power/field strength:    < 50mV/m 
Type of modulation:      GFSK  
Method of frequency generation: fractional N PLL synthesizer 
Number of channels:      2ch 
Power supply:        battery (CR 2430) 
nominal voltage                                    3,0V  
Voltage supply range:                          2,4V ... 3,2V  
Type of battery:        lithium 
Transmission range:      100 m (system range)  
type of antenna:                                    PCB loop antenna  
length/size of antenna:                         ca. 4...5cm 
7. LABEL DESIGN USA, Canada, Mexico 
 Siemens VDO 
5WK49266 
IC: 267T-5WK49266     
FCC ID:KR55WK49266 
Entry Owners Manual, Canada, USA: 
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.