Continental Automotive Technologies TXN3 Radio Frequency Transmitter User Manual User manual model TXN3 keyfob V1
Continental Automotive GmbH Radio Frequency Transmitter User manual model TXN3 keyfob V1
User manual

Continental Automotive France SAS     
Interior Division- Body & Security   
-1-
October 16, 2017
User Manual 
 of the 
 Continental 
 Radio Frequency Transmitter 
Model: 
TXN3 (433.92 MHz) 

Continental Automotive France SAS     
Interior Division- Body & Security   
-2-
October 16, 2017
UsermanualoftheTXN3key
1  General  Product  Information 
This document gives an overview of the different device operation modes and the RF transmissions 
performance of the key model TXN3. In this document the device is referenced as "key", even if the 
mechanical backup key might be separated from it. 
1.1  Trade mark 
Continental 
1.2  Brand 
Continental 
1.3  Manufacturer 
Continental Automotive GmbH 
Siemensstr. 12 
93055 Regensburg 
Germany 

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2  Operating modes 
The key has three main operating modes which differ regarding of the signal transmitting with the 
RF: 
 • Immo    Immobilizer transponder mode 
• RKE    Remote keyless functionality 
• PASE    Passive key functionality 
2.1  Immobilizer Transponder mode 
When the key is operating as an immobilizer transponder, the communication is done via a "contact less 
interface" depending on a magnetic coupling. 
2.2  Remote keyless functionality 
This mode refers to use the key as a remote control unit to initiate actions on the vehicle such as open 
or close door latches. RF transmission depends on a user activating (a button pressing) on the key. 
During the button pressing the amount of telegrams are sent on the RF channel at 433.92 MHz. 
A short valid button pressing results a sending of the minimum number of the RF telegrams. 
If the duration of the button pressing extents the time required for transmitting the minimum amount of 
RF telegrams, additional telegrams will be sent until the button is released or a timeout of 10s is reached. 
This timeout function prevents the unintended transmission over the extended time periods in case of a 
button was fixed. 
2.3  Passive key functionality 
For passive key operation no user action on the key side is required. The trigger is delivered by the 
vehicle via an LF 125 kHz data telegram. When the key receives a valid LF message, it responds with 
two RF telegrams and the inter telegram timing in this mode depends on the key configuration data (sort 
of time slot concept). 
The Low Frequency stage operates at 125 kHz.   

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3  Button functions 
The validation of the accurate frequency deviation and the measurement of the transmission function of 
the key are implemented basing on RF test software. The graphic below shows the functionality of the 
buttons. 
First Button 
press 
Press and hold button
Lock vehicle  Comfort Close 
Unlock vehicle  Comfort Open 
Open trunk  Open trunk 
Alarm 
signaling  Alarm signaling 
4  Key fobs Variants 
Product reference
Product variant  Drawing 
S180144500  Lock/Unlock 
433.92 MHz 
S180144501   
Lock/Unlock/Trunk 
433.92 MHz 
Button 
Lock
Button 
UnLock
Button 
Trunk
Button 
Panic

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October 16, 2017
S180144502  Lock/Unlock/Panic 
433.92 MHz 
S180144503  RES/Lock/Unlock/Panic 
433.92 MHz 
S180144600  Lock/Unlock 
315 MHz 
S180144601  Lock/Unlock/PSD-L 
315 MHz 
S180144602 
Lock/Unlock/PSD-
L/PSD-R 
315 MHz 
S180144603  Lock/Unlock/PSD-L 
433.92 MHz 

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October 16, 2017
S180144604 
Lock/Unlock/PSD-
L/PSD-R 
433.92 MHz 
S180144700   
Lock/Unlock/PBD 
433.92 MHz 
S180144701   
Lock/Unlock/PBD/P 
433.92 MHz 
S180144702   
RES/Lock/Unlock/PBD 
433.92 MHz 
S180144800  Lock/Unlock/ Trunk 
433,92MHz 
S180144801 
Lock/Unlock/ 
Trunk/Panic 
433,92MHz 

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Interior Division- Body & Security   
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October 16, 2017
S180144802  RES/Lock/ Unlock/Trunk 
433,92MHz 
S180144804  Lock/Unlock/ Trunk 
315MHz 
5  Product Label Information model TXN3 
5.1  EC 
 Continental 
Model: TXN3 
5.2  USA/Canada 
 Continental 
Model: TXN3 
FCC ID: KR5TXN3 
IC:7812D-TXN3 
6  User  Manual model TXN3 
6.1  User Manual USA/Canada 
FCC ID: KR5TXN3 
IC:7812D–TXN3 
This  device  complies  with  Part  15  of  the  FCC  Rules  and  Industry  Canada  licence-exempt  RSS 
standard(s).  Operation  is  subject  to  the  following  two  conditions:  (1)  this  device  may  not  cause 
interference, and (2) this device must accept any interference, including interference that may cause 
undesired operation of the device. 
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio 
exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit 

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pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique 
subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
This device complies with FCC/IC radiation exposure limits set forth for an uncontrolled environment 
and meets the FCC radio frequency (RF) Exposure Guidelines and RSS
‐
102 of the IC radio frequency 
(RF) Exposure rules. This transmitter must not be co-located or operating in conjunction with any other 
antenna or transmitter. 
Le présent appareil est conforme à l'exposition aux radiations FCC / IC définies pour un 
environnement non contrôlé et répond aux directives d'exposition de la fréquence de la FCC 
radiofréquence (RF) et RSS
‐
102 de la fréquence radio (RF) IC règles d'exposition. L'émetteur ne doit 
pas être colocalisé ni fonctionner conjointement avec à autre antenne ou autre émetteur. 
This equipment has been tested and found to comply with the limits for a Class B digital device, 
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection 
against harmful interference in a residential installation. This equipment generates, uses and can 
radiate radio frequency energy and, if not installed and used in accordance with the instructions, may 
cause harmful interference to radio communications. However, there is no guarantee that interference 
will not occur in a particular installation. If this equipment does cause harmful interference to radio or 
television reception, which can be determined by turning the equipment off and on, the user is 
encouraged to try to correct the interference by one or more of the following measures: 
 -  Reorient or relocate the receiving antenna. 
-  Increase the separation between the equipment and receiver.  
-  Connect the equipment into an outlet on a circuit different from that to which the receiver is 
connected.  
-  Consult the dealer or an experienced radio/TV technician for help. 
CAN ICES-3 (B) / NMB-3 (B) 
This Class B digital apparatus complies with Canadian ICES-003. 
Cet appareil numérique de classe B est conforme à la norme canadienne NMB-003.
Continental Automotive GmbH has not approved any changes or modifications to this device by the 
user. Any changes or modifications could void the user’s authority to operate the equipment. 
Continental Automotive GmbH
n’approuve aucune modification apportée à l’appareil par l’utilisateur, 
quelle qu’en soit la nature. Tout changement ou modification peuvent annuler le droit d’utilisation de 
l’appareil par l’utilisateur.