Continental Automotive Technologies T2X Radio Frequency Transmitter User Manual T2x
Continental Automotive GmbH Radio Frequency Transmitter T2x
Users manual

Continental AG   I BS PG3 CFRF WM 
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 User Manual  
of the  
Continental 
 Radio Frequency Transmitter  
Type 
  T2x 

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1. GENERAL DESCRIPTION OF THE RF TRANSMITTER  
The Acura fob is a transmitter designed to provide remote keyless entry, 
passive entry, passive engine start, and immobilization functionality. The term 
that Honda uses to describe such a transmitter is a SMART fob. 
The Acura fob MY18 is initially going to launch in North America on the 
platform RDX.  
There are supported different button-variants: 
            4 Button                3 Button  
Within  the  housing  is  applied  an  inner  container,  containing  a  lower 
container and container cover which are laser welded. Within the container 
is placed a PCB,  which  is the same type for  all variants  and  containing a 
different number of switches.  
The fobs are part of a larger system provided to Honda by Continental which 
allows the customer to: 
 •  Remotely lock the doors. 
•  Remotely unlock the doors. 
•  Remotely open the trunk. 
•  Remotely activate the alarm (panic mode). 
•  Remotely unlock and lock doors in passive mode (PASE). 
•  Start engine in passive mode (PASE). 
•  Start the car via fob slot (immobilization). 
•  Use mechanical emergency key as back-up. 

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Technical Description 
The components which constitute the Acura MY18 RDX fob are: 
•  Power Supply 
•  Microcontroller 
•  User Interfaces 
•  LF Antenna (3D-Antenna in one SMD)   
•  RF Antennas 
•  The PCB is 4 layer Pb-Free FR4 with double-sided component 
placement. 
3. POWER SUPPLY 
The  Power  Supply  consists  of  a  CR2032  battery  with  filter  capacitors  that 
provide power to the microcontroller. 
4. VARIANTS 
Main 
Variant
OEM
Frequency
Description differences
T2x
Acura 
chromated buttons 
433 MHz  Number of buttons 
The difference within a main-variant is only the number of buttons. There is no 
difference for RF-stage or RF-setup.   

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Variants Matrix: 
T2x 
chromated 
buttons 
(Acura) 
Button config (second digit)  433 MHz 
Tx1 
1-1-1-P  T21 
Tx2 
2-2-1-P  Not used
Tx3 
1b-1b-P  Not used
Tx4 
1-1-2-P  Not used
Tx5 
1-1-1-x  T25 
Tx6 
2-2-1-x  Not used
Tx7 
1b-1b-x  Not used
Tx8 
1-1-2-x  Not used

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5. TECHNICAL DATA 
The fobs transmit on two RF-channels. 
Variant  Frequency  Modulation  Radiated Power 
T2x Channel 1: 433,66 MHz 
Channel 2: 434,18 MHz FSK  < 10 mW 
6. LABEL DESIGN  
USA and Canada: 
Continental       
Model: T2x       
FCC ID:KR5T2X 
IC:7812D-T2X     
Owner Manual Canada: 
Operation is subject to the following two conditions: (1) this device may not 
cause harmful interference, and (2) this device must accept any interference 
received, including interference that may cause undesired operation. 
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 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. 
Owner Manual USA 
This device complies with Part 15 of the FCC Rules. Operation is subject to 
the following two conditions: (1) this device may not cause harmful 
interference, and (2) this device must accept any interference received, 
including interference that may cause undesired operation. 
Changes or modifications not expressly approved by the party responsible 
for compliance could void the user's authority to operate the equipment. 

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