Continental Automotive 37924100 Remote Transceiver for Car Access User Manual Functional description
Continental Automotive GmbH Remote Transceiver for Car Access Functional description
Contents
- 1. User manual
- 2. User manual statements
User manual

Continental AG   I BS PG3 CFRF WM 
User Manual  
of the  
Continental 
 Radio Frequency Bidirectional Key Fob  
Type 
 Acura Bidir Fob MY13.5  
A2C37924100 

Continental AG   I BS PG3 CFRF WM 
GENERAL DESCRIPTION OF THE RF TRANSMITTER  
The Acura Bidir Fob is a bidirectional RF key designed to provide remote 
engine start with feedback, remote keyless entry, passive entry, passive 
engine start, and immobilization functionality. 
The Acura Bidir Fob has a housing, which may have variants in the pictogram 
“Trunk”, alternatively “Power-Tail-Gate”(PTG): 

Continental AG   I BS PG3 CFRF WM 
Feedback on Bidir Fob  
There exist 3 LEDs for all feedback, at the top of the fob,  
out of the way of the hand that is holding it. 
LEFT LED   Color : AMBER 
Function:  To show RF communication, or that 2-way 
communication is taking place. 
Example:  LEFT/AMBER LED flashes 1x  in response to a 
button being pressed when the  RF command  is sent, 
and/or it can flash while communicating with the vehicle, or 
waiting for response (example: while engine is cranking) .  
Also this LED will blink in response to SMART entry 
authentication. 
For other cases, generally the Amber LED should operate 
in a manner that is respective of the  "Base SMART  key".   
CENTER LED   Color:  GREEN.  
Function:  Used to show positive feedback for a given 
command. 
Example:  CENTER/GREEN LED  is on for 1 second, to  
provide status feedback for a given operation. It means:  
Doors were locked, or engine was started, or engine is ON. 
RIGHT LED   Color:  RED.  
Function: Used to show negative feedback for a given 
command. 
There are 2 modes. 
1.  Out of range.  In this case the red LED blinks distinctly 
3 times, 
Example: 3 times in 1 second.  It means the fob could 
not get acknowledgement from the car for 2-way 
communication, or the vehicle battery is dead and 
cannot respond. 
2.  Cannot Lock or Engine not running. In this case the red 
LED is on for 1 second.   

Continental AG   I BS PG3 CFRF WM 
POWER MANAGEMENT 
The Power Supply comprises a coin cell battery CR2032, filter capacitors, 
diodes, and FETs, that provides power to the microcontroller, the power-
management with charger and the RF circuit. A rechargeable battery (accu) of 
the type LiFePO4 is included to supply higher currents in case of long range 
transmission. 
The accu type LiFePO4 is of the class Li-Ion cell, but with a safe chemistry. 
There exists a certificate, that it is not dangerous / harmfull in the sense of 
UN3480 and "Transportation without Class 9 is allowed". 
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. 
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.  
. 
NOTE:  
Changes or modifications not expressly approved by the manufacturer could 
void the user's authority to operate the equipment. 

Continental AG   I BS PG3 CFRF WM 
6. TESTMODE FUNCTION 
The testmode function is only available by EEPROM settings, which could 
provided only in specially programmed samples for measuring purpose.  
Button functions 
Button description 
red LED 
green LED 
amber LED 
ENG.START  
no function 
LOCK  
TX CW Modes 
X 
X 
UNLOCK  
TX Modulated Modes 
X 
X 
TRUNK  
RX Modes 
X 
X 
X 
PANIC  
another inner function 
X 
X 
X 
By pressing the specified button, the previously defined channels are 
revolving. 
The Lock button revolves the 8 Channels CW-mode till TX-off 
3x red 
LED 
flash1, 
TX OFF 
all LEDs 
OFF 
switch to 
bat-supply, 
TX ON,  
TX-SR-CH1, 
CW-f_low 
TX-SR-CH1, 
CW-f_high 
TX-SR-CH2, 
CW-f_low 
TX-SR-CH2, 
CW-f_high 
switch to 
accu-supply, 
TX-LR-CH1, 
CW-f_low2 
TX-LR-CH1, 
CW-f_high2 
TX-LR-CH2, 
CW-f_low2 
TX-LR-CH2, 
CW-f_high2 
Notes: 
1: 3x red flash: 200ms on, 200ms off, 200ms on, 200ms off, 200ms on, off 
2: ATIC134 Lite option only 

Continental AG   I BS PG3 CFRF WM 
The Unock button revolves the 4 modulated channels till TX-off 
The Trunk button revolves the 2 Receive-Channels till RX-off 
3x red LED 
flash1, 
RX OFF 
all LEDs 
OFF 
switch to 
bat-supply, 
RX ON, 1x 
green&red 
LED flash, 
RX-SR-CH1 
2x 
green&red 
LED flash, 
RX-SR-CH2 
3x 
green&red 
LED flash, 
RX-LR-CH1 
4x 
green&red 
LED flash 
 RX-LR-CH2 
Notes: 
1: 3x red flash: 200ms on, 200ms off, 200ms on, 200ms off, 200ms on, off 
1x amber 
LED flash  
1x amber 
LED flash  
1x amber 
LED flash  
1x amber 
LED flash  
3x red LED 
flash1, 
TX OFF 
all LEDs 
OFF 
switch to bat-
supply, TX 
ON, TX-SR-
CH1, mod.  
TX-SR-CH2, 
mod.  
switch to accu-
supply, TX-
LR-CH1,  
mod. 2 
TX-LR-CH2, 
mod.2 
Notes: 
1: 3x red flash: 200ms on, 200ms off, 200ms on, 200ms off, 200ms on, off 
2: ATIC134 Lite, test signal data content:  zeros 

Continental AG   I BS PG3 CFRF WM 
7. LABEL DESIGN  
CANADA 
IC:7812D-37924100 
USA  
FCC ID:KR537924100 
The print is visible after opening the 
Fob like for battery change.
How to open the Bidir Fob for Battery Change  
Take a coin (best fit: 2€, or a Quarter Dollar), press it into the groove and turn 
it against the metallic eyelet counterclockwise. 
For closing follow the instruction: