Continental Automotive Technologies HFMC1A01 Radio Frequency Transmitter-Receiver User Manual
Continental Automotive GmbH Radio Frequency Transmitter-Receiver
User manual

Document:            User Manual 
Product:  BCM (Body Control Module) 
  HFM C1A 
Model:   HFMC1A01 
Date:  November 22, 2017 
Name: 
Department: 
Phone: 
Date: 
Sign: 
Author: 
Jérôme Lee 
I B&S RD RF 
+33561196241 
22/11/2017 
1. Check: 
Sven Kubeil 
I B&S RD RF 
+49941790292 
Responsible: 
Patrick Mazo 
I B&S S2 
+33561198592 
.
Proprietary      data,      company      confidential.        All    rights      reserved.
Confié      à      titre    de    secret      d'entreprise.    Tous    droits      réservés.
Comunicado  como  segredo  empresarial.  Reservados  todos  os    direitos.
Confidado  como  secreto  industrial.  Nos  reservamos  todos los  derechos. 
.

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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Page 2 / 10 
VERSIONS LIST 
Version 
Date 
Author 
Comment, Description 
V1 
05/07/2017 
Jérôme Lee 
Creation 
V2 
22/11/2017 
Jérôme Lee 
General update 
RELATED DOCUMENTS 
Document 
Version 
Date 
Author 
Comment, Description 
ABBREVIATION REGISTER 
Abbreviation 
Description 
As 
Assistant 
ASK 
Amplitude Shift Keying 
BCM 
Body Control Module 
HFM 
Hand Free Module 
CW 
Continuous Wave 
DR 
Driver 
FCC 
Federal Communication Commission 
FSK 
Frequency Shift Keying 
LF 
Low Frequency 
RF 
Radio Frequency 
RKE 
Remote Keyless Entry 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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Page 3 / 10 
VERSIONS LIST ............................................................................................................................................................ 2 
RELATED DOCUMENTS ................................................................................................................................................ 2 
ABBREVIATION REGISTER ........................................................................................................................................... 2 
1 SYSTEM OVERVIEW .......................................................................................................................................... 4 
1.1 SCOPE OF DOCUMENT ................................................................................................................................... 4 
1.2 SHORT DESCRIPTION OF THE COMPLETE SYSTEM INCLUDING HFM ............................................................ 4 
2 CAR ACCESS ...................................................................................................................................................... 5 
3 ENGINE START ................................................................................................................................................... 6 
4 RF AND LF SYSTEM OVERVIEW ................................................................................................................... 7 
4.1 REMOTE KEYLESS ENTRY SYSTEM DESCRIPTION ............................................................................................ 7 
4.2 PASSIVE ACCESS & PASSIVE START SYSTEM DESCRIPTION ............................................................................. 7 
5 PICTURES ............................................................................................................................................................. 8 
6 LABEL  INFORMATION ..................................................................................................................................... 9 
6.1 EC ................................................................................................................................................................... 9 
6.2 USA/CANADA ................................................................................................................................................. 9 
7 OWNER  MANUAL STATEMENTS ................................................................................................................. 9 
7.1 OWNER MANUAL CANADA .............................................................................................................................. 9 
7.2 OWNER MANUAL USA .................................................................................................................................. 10 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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Page 4 / 10 
1  SYSTEM OVERVIEW  
1.1  Scope of Document 
 The aim of this document is to provide a short overview on the HFM Hand free system BCM 
(Body Control Module) HFM C1A model HFMC1A01. 
1.2  Short Description of the complete system including HFM 
The HFMC1A01 is a radio frequency transmitter-receiver used in vehicle access systems. 
The vehicle access system includes: 
  Key fob, which is a remote device 
It includes a 315 MHz or 433.92 MHz transmitter, a 125 kHz LF receiver and a 125 kHz 
transponder 
  LF Antennae 
  Kazashi includes a coil antenna for 125 kHz transponder communication 
  Hand Free Module (HFM): 
 It includes a 125 kHz LF long range and transponder transmitters and a 433.92 MHz 
receiver. The HFM drives 6 external dedicated antennae for the 125 kHz transmission. 
Two are located in the doors trims, one in the Bumper, two within the vehicle cockpit and 
one in the trunck. It includes also an integrated RF receiver for 433.92 MHz. The receiver 
is designed in direct placement. 
The system interacts with other modules such as: 
  Push Engine Start 
  Body Control Module 
 ESCL (Electronic Steering Lock Control) 
  USM 
The main functions performed by the system are: 
  RKE functions (key less features) 
  Hand Free functions for vehicle access and engine start 
  Immobilizer 
  LF antennae management 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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Page 5 / 10 
2  Car Access 
There are two ways to Lock or Unlock the doors of the vehicle: 
 1.  The first way is to use the remote key functionality (RKE) by pressing one of the “Lock” 
or  “Unlock”  buttons  on  the  ID  Key.  Data  frames  are  then  transmitted  at  315  MHz  or 
433.92 MHz from the key fob ID of the car. The HFM processes the frames received and 
when the security code is correct, the doors are locked or unlocked automatically. 
 Car access functions by remote control are allowed using any key fob type  
2.  The second way is to use the free hand mode 
  Unlocking the vehicle: 
If the car is locked, when the door request switch located in the door is pressed by car 
user which has a car key fob, the HFM transmits data frames at 125 kHz. When the key 
fob receives the data and recognizes the content of the inquiry, it transmits the code to 
the car at 433.92 MHz or 315 MHz (depending of key fob frequency type). The HFM 
processes the frames received and when the code is correct, the doors are automatically 
unlocked. 
  Locking the vehicle: 
If the car is unlocked, when the door request switch located in the door is pressed by car 
user which has a car key fob, the HFM transmits data frames at 125 kHz. When the key 
fob receives the data and recognizes the content of the inquiry, it transmits the code to 
the car at 433.92 MHz or 315 MHz (depending of key fob frequency type). The HFM 
processes the frames received and when the code is correct, the doors are automatically 
locked. 
 Car access functions by hand free are allowed using any key fob type. 
Remarks: 
The operating free hand mode range of the product model named HFMC1A01 is less than 15 
meters. 
The maximum operational distance using the hand free mode of this product is: 3 meters 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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3  Engine Start 
There are two ways to start the Engine: 
 1.  When the Hand free functions are disabled 
First User has to hold the key fob in front of Immobilizer antenna for at least than 30s after one 
of the following action: press of the “START” button on the dashboard, open or close a door or 
press vehicle brake pedal. Each key fob has a transponder. When the key fob is hold in front 
of Immobilizer antenna, the HFM sends a ‘transponder” recognition order to the key fob throw 
the  Immobilizer  antenna. The  HFM  performs  a  ‘transponder”  authentication  using  125  kHz 
transceiver. The key fob sends the authentication result to the HFM. Then the HFM sends on 
the CAN bus a message to the central unit and engine control unit to allow or not the START 
of the engine. 
The engine starts function is allowed using any key fob type. 
 2.  When the Hand free functions are enabled 
The user does not need to hold the key fob in front of the Immobilizer antenna. The key fob 
should  only  be  inside  the  vehicle.  When  the  “START”  button  is  pushed, the  HFM sends  a 
recognize message at 125 kHz link via internal LF antennas. Receiving this message, the key 
fob sends an authentication message at 433.92 MHz or 315 MHz (depending of the key fob 
frequency type) to the HFM. Then the HFM sends on the CAN bus a message to the central 
unit and engine control unit to allow or not the START of the engine. 
 The engine start function is allowed using any key fob type. 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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4  RF and LF System overview 
4.1 Remote Keyless Entry System description 
4.2 Passive Access & Passive Start System description 
RF
RF-Technology
(315 MHz or 433.92 MHz)
RF Receiver RF Transmitter
RF
RF Receiver RF Transmitter
LF ReceiverLF Transmitter
RF-Technology
(315 MHz or 433,92 MHz)
LF-Technology
(125 kHz)

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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Page 8 / 10 
5  Pictures 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
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6  Label  Information 
6.1 EC 
 Continental 
HFMC1A01 
6.2 USA/Canada 
Continental 
Model: HFMC1A01 
FCC ID: KR5HFMC1A01 
IC:7812D-HFMC1A01 
CAN RSS-Gen/CNR-Gen 
IC:7812D-RXIDP434 
7 Owner  Manual Statements 
7.1 Owner manual Canada 
IC:7812D–HFMC1A01 
CAN RSS-Gen/CNR-Gen 
IC:7812D-RXIDP434 
This device complies with Industry Canada license-exempt RSS standard(s). 
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. 

Author: 
 JEROME LEE 
USER MANUAL 
Version: 
2.0 
HFMC1A01 
Chap. 0 
File: 
User_Manual_Model_HFMC1A01_v2.0.
docx 
                           Fehler! Verweisquelle konnte 
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7.2 Owner manual USA 
FCC ID: KR5HFMC1A01 
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. 
No changes shall be made to the equipment without the manufacturer’s permission as this may 
void the user’s authority to operate the equipment. 
END OF DOCUMENT