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.P Document : User Manual for Smart Key Fob Model :
Project Code :
SVI-KHFGE04 Version:
1.0 Date:
Nov. 14. '11
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.W Engineering change order-No.:
Design Freeze No.:
Number of pages:
6 Filename:
User Manual for KH_DM_Fob.doc CASCO Identification No. :
Contents list System configulation Scope of SMART KEY SYSTEM Short description of the SYSTEM General Definition of SMART KEY 1. 1.1 1.2 1.2.1 1.2.2 Wireless Communication 1.2.3 1.3 2 2.1 Concept Description System Overview / Block Diagram Smart Key Fob for homologation Button operation for homologation Page 3 3 3 3 3 3 4 6 6
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.W Editor :
KN.Kim Document name Project code Version:
1.0 Nov. 14. 2011 Identification No. : Document No. ECO / DF No. File: User Manual for KH_DM_Fob ().doc Page 2 / 6 1. System configulation 1.1 Scope of SMART KEY SYSTEM The System offers the following features:
passive access for two doors, driver side and passenger side as well as trunk/tailgate passive start after interior detection of the SMART KEY FOB (without interior trunk and hat shelf detection) LF-RF communication (based on Siemens SMART KEY system) passive access trunk/tailgate via the trunk lid switch at the trunk max. 2 SMART KEY FOBs can be handled by the system communication to the engine management system via a single line interface communication to the ESCL via a single line interface
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.P 1.2 Short description of the SYSTEM t r 1.2.1 General Definition of SMART KEY
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.W The SMART KEY system is a system that allows the user to access and operate a vehicle in a very convenient way. To access the vehicle no traditional key or remote control unit is needed. The user carries a SMART KEY FOB which itself does not require any conscious actions by the user (e.g. operate a button). After being triggered the vehicle sends out a request in a limited range. If the SMART KEY FOB receives this request, it automatically sends a response to the vehicle. Then the system decides whether to perform a particular action (unlocking, locking) or remain inactive. 1.2.2 Wireless Communication Electromagnetic waves are used to exchange information between the vehicle and the SMART KEY FOB. Both, vehicle and SMART KEY FOB are equipped with a transmitter, a receiver and several antennas. 1.2.3 Concept Description With this concept it is possible to have a set of interior antennas that covers the vehicles interior and a set of exterior antennas that covers the vehicles exterior. For an unambiguous separation between the vehicles interior and exterior it is sufficient that at least one area is covered exactly by the corresponding operating ranges of the antennas. The functions of the SMART KEY system have to be provided in a clearly defined and limited range. For the up-link from the vehicle to the SMART KEY FOB, a magnetic field with a frequency of 125 kHz and ASK modulation is used. Inductive antennas in and at the vehicle radiate the electromagnetic energy. Editor :
KN.Kim Document name Project code Version:
1.0 Nov. 14. 2011 Identification No. : Document No. ECO / DF No. File: User Manual for KH_DM_Fob ().doc Page 3 / 6 t i
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.W Technical aspects of 125 kHz magnetic field:
virtually no reflections, cubical decrease of field strength allows good range control, released frequency band (ISM), high penetration, low quiescent current demand due to 125 kHz input stage (SMART KEY FOB), less sensitive for detuning compared to higher frequency. For the down-link from the SMART KEY FOB to the vehicle, the standard radio frequency
(RF) is used (similar to the classic remote control functions) with FSK modulation. 1.3 System Overview ECU sends LF challenge via exterior antenna ID tag sends identification code to RF receiver Doors are unlocked automatically User pulls open the door L F Figure 1: Principle of Communication Editor :
KN.Kim Document name Project code Version:
1.0 Nov. 14. 2011 Identification No. : Document No. ECO / DF No. File: User Manual for KH_DM_Fob ().doc Page 4 / 6 2 Smart Key Fob for homologation 2.1 Button operation for homologation Lock Unlock Trunk Panic You can lock, unlock, trunk and panic warning your vehicle with this remote transmitter. Lock
- When you push this button, all the doors will be locked.
- You can not lock any of the doors with this remote transmitter if any door is open or the key is in the fob holder. Unlock
- When you push this button, all the doors will be unlocked.
- You can not unlock any of the doors with this remote transmitter if any door is open or the key is in the fob holder. Trunk
- When you push this button more than 1 second, the trunk will be opened. Panic
- When you push this button for 1 second, Horn will alarm. Editor :
KN.Kim Document name Project code Version:
1.0 Nov. 14. 2011 Identification No. : Document No. ECO / DF No. File: User Manual for KH_DM_Fob () R1 Page 5 /6
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