Continental Automotive MARSKEYLESS Users manual
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
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Hardware Description
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Hella 8303EN_GE (2004
-09)
Copyright Protection: Confidential - ISO 16016
Table of Content
1 General Information ............................................................................................ 2
2 LF- Performance in Typical Application ............................................................ 3
2.1 LF Antenna Positions in Vehicle ............................................................................. 4
2.2 Authentication Ranges Inside and Outside the Vehicle ........................................... 5
3 HW-Description ................................................................................................... 6
3.1 DAIMLER MARS ECU ............................................................................................ 6
3.2 ECU Layout ................................................................ ............................................ 6
3.3 ECU Schematic ...................................................................................................... 8
3.4 BOM (Populated Parts) of Hella Part ...................................................................... 8
3.5 Block Diagram of Related Functional Modules ...................................................... 11
4 LF-Driver Hardware Module with 5291 ............................................................ 12
4.1 Functional Description .......................................................................................... 13
4.1.1 General Function ....................................................................................................... 13
4.1.2 PEPS Tx Mode .......................................................................................................... 13
4.1.3 Immo TxRx Mode....................................................................................................... 14
5 LF-Antennas ...................................................................................................... 15
5.1 Documentation C2-Sample ................................................................................... 16
5.1.1 Connection Schematic 207.308-00, A167 905 47 00 ................................................ 16
5.1.2 Picture of the C2-Sample Antenna ............................................................................ 17
5.1.3 Mechanical Parameter ............................................................................................... 18
6 Software for LF Transmitter Mode (Data and CW) for Homologation ........... 19
6.1 LF Data Scan ........................................................................................................ 20
6.1.1 Single Transmission LF Scan .................................................................................... 20
6.1.2 Single Transmission – f = 125kHz Oscillating Signal ............................................... 20
6.1.3 Repetition of Transmissions ...................................................................................... 21
6.2 IMMO Transponder Start ...................................................................................... 22
6.2.1 Single Transponder Start and Repetition of Transmissions ...................................... 22
6.2.2 Data Transmission ..................................................................................................... 23
7 Test Set Up for Homologation .......................................................................... 24
7.1 Setup in Block Diagram View ................................................................................ 24
7.2 ECU and Connector Pinning for Hella design part ................................................ 25
7.3 Components on Setup .......................................................................................... 26
7.4 Schematic ................................ ................................................................ ............. 27
8 Housing views including Label ........................................................................ 28
9 FCC Compliance statements............................................................................ 29
10 PHOTOS ............................................................................................................. 30
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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This document is confidential. Its contents are not to be exploited, passed on or disclosed to third parties without our express permission. All rights are reserved.
Hella 8303EN_GE (2004
-09)
Copyright Protection: Confidential - ISO 16016
1 General Information
In this document the Keyless GO and Start System is introduced.
Keyless Entry Systems are the consequent development of well-known Remote Keyless Entry Systems
(RKE), the usage of the key fob with button pressing is still possible, but not necessary anymore to
enter the vehicle or to start it.
With the Hella Components UID, LF antennas and Keyless Start ECU it’s possible to equip a vehicle
with only a few components and realize this very convenient and luxury feature.
The ECU is built together with Continental Corporation Germany.
Hella is the Engineering Distributer AND Designer for the part that is to be approved.
The Model Name of the described ECU is:
MARS Keyless
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
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Dept.:
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E-B-D2-HW
Doc. name:
Process
Hardware Description
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-09)
Copyright Protection: Confidential - ISO 16016
2 LF- Performance in Typical Application
In the MARS EIS ECU the Hella LF Driver Part is connected with Hella LF Antennas.
A UID – also manufactured from Hella – is to be found inside or outside the vehicle, whether a special
occasion happens.
Here are some examples:
- Passive Entry / Exit
A Person with the UID nears to the locked vehicle.
If he grabs the door handle capacitive unlock sensor is activated and the complete Keyless Entry
Protocol is started. The side LF antenna is transmitting LF data and a carrier signal, which can be
recognized and judged by quantity (RSSI-measurement) by the UID.
The measured field strength is sent to the ECU and is judged.
If the magnetic field strength is high enough (a certain border is reached). The doors will unlock.
The additional LF communication guaranties the functionality, that only the valid key OUTSIDE the
vehicle authenticates the system to unlock the car passively.
If the magnetic field strength is not high enough (e.g. the UID is too far away from the vehicle, the
border is not reached), the UID shuts down again and waits for the next LF Data. The vehicle is still
locked.
A Person with the UID is leaving the vehicle. If he touches the capacitive lock sensor at the door
handle, the complete Keyless Exit Protocol is started:
The side LF antenna is transmitting LF data and a carrier signal, which can be recognized and judged
by quantity (RSSI-measurement) by the UID.
The measured field strength is sent to the ECU and is judged.
If the magnetic field strength is high enough (a certain border is reached). The doors will lock.
The additional LF communication guaranties the functionality, that only the valid key OUTSIDE the
vehicle authenticates the system lock the car passively. If the UID is left inside the car, the car won’t
lock.
If the magnetic field strength is not high enough (e.g. the UID is too far away from the vehicle, the
border is not reached), the UID shuts down again and waits for the next LF Data. The vehicle is still
open.
- Passive Start
A Person with the UID inside of the vehicle is pressing the Start-Stop-Switch. The Start-Stop-Switch
activates the complete Keyless Start protocol:
The interior antenna is transmitting the LF Data and a carrier signal, which can be recognized and
judged by quantity (RSSI-measurement) by the UID.
The other two interior antennas IN1 and IN2 transmit two additional carrier signals sequential.
If the magnetic field strength of one of these transmits is high enough (a certain border is reached) then
the UID authenticates the system to start the vehicle.
If the magnetic field strength of all antenna transmits are too low (the field strength border is not
reached, maybe the UID is laying outside or is held 10cm outside the vehicle) the car won’t start.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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-09)
Copyright Protection: Confidential - ISO 16016
2.1 LF Antenna Positions in Vehicle
Fig. 1 Antenna Positions at a Keyless Entry / Keyless Start Vehicle
side LF antenna driver (left)
side LF antenna passenger (right)
IN1
IN2
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
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E-B-D2-HW
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Process
Hardware Description
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-09)
Copyright Protection: Confidential - ISO 16016
2.2 Authentication Ranges Inside and Outside the Vehicle
Fig. 2 Principle of Magnetic Field Detection Areas
outside detection
outside detection
inside detection
outside rear
detection
approx. 180cm
approx. 180cm
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004
-09)
Copyright Protection: Confidential - ISO 16016
3 HW-Description
3.1 DAIMLER MARS ECU
The main tasks of the MARS EIS ECU are: Entry/Exit functionality with unlock and lock sensor signal
analysis, Keyless Go / Keyless Start functionality, LF-Message transmission, Immobilizing functionality
communication with other ECU’s on CAN by building a gateway.
3.2 ECU Layout
Fig. 3 Layer 1 Fig. 4 Layer 2
Fig. 5 Layer 3 Fig. 6 Layer 4
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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-09)
Copyright Protection: Confidential - ISO 16016
Fig. 7 Layer 5 Fig. 8 Layer 6
Fig. 9 Layout LF- Driver Part in Detail, marked orange area is to generate f=125kHz-signal
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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-09)
Copyright Protection: Confidential - ISO 16016
3.3 ECU Schematic
Fig. 10 Schematic of LF Driver Part of MARS EIS ECU
3.4 BOM (Populated Parts) of Hella Part
C600
D670
R664
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004
-09)
Copyright Protection: Confidential - ISO 16016
C601
D685
R665
C602
D700
SS2H10HE3
R666
C603
D701
SS2H10HE3
R667
C604
IC002
ATA5291
R670
C605
IC685
R671
C606
L700
47u
R672
C607
L701
47u
R673
C608
R600
R674
C609
R601
R675
C610
R602
R676
C611
R603
R677
C612
R604
R678
C613
R605
R679
C614
R606
R680
C615
R607
R681
C616
R608
R682
C617
R609
R683
C655
R610
R685
C656
R611
R686
C657
R612
R687
C658
R613
R688
C659
R614
R689
C670
R615
R690
C671
R616
R701
1
C672
R617
R702
100k
C673
R618
R703
442
C674
R619
R704
47k
C685
R620
R705
50m
C686
R621
R706
47k
C687
R622
R707
50m
C688
R623
R708
1
C700
100n
R624
R709
50m
C701
4.7n
R625
R710
2.2k
C702
10n
R626
R711
50m
C703
4.7u
R627
R712
44.2k
C704
4.7u
R628
R713
442
C705
4.7n
R629
R714
4,7
C706
10u
R630
RN700
10k
C707
4.7n
R631
RN701
2.2k
C708
100n
R632
RN702
100k
C709
4.7n
R633
T600
C710
4.7n
R634
T601
C712
4.7n
R635
T602
C714
4.7n
R636
T603
C715
4.7n
R637
T604
C716
4.7n
R638
T605
C717
3.3u
R639
T606
C718
4.7n
R640
T607
C719
220u
R641
T608
C720
100n
R642
T609
C721
220n
R643
T610
C722
220n
R644
T611
C723
220n
R645
T612
C724
10n
R647
T613
C725
1n
R648
T614
C726
330u
R655
T615
D600
R656
T616
D601
R657
T617
D602
R658
T618
D603
R659
T619
D604
R660
T620
D605
R661
T621
D655
R662
T622
D656
R663
T623
Parts used in Hella schematic part that is to be approved.
DAIMLER MARS EIS ECU – Homologation of LF-Driver Part - FCC
Author:
Dept.:
HW Engineering
E-B-D2-HW
Doc. name:
Process
Hardware Description
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Hella 8303EN_GE (2004
-09)
Copyright Protection: Confidential - ISO 16016
T624
T655
T656
T657
T658
T659
T660
T670
T671
T672
T673
T674
T675
T685
T686
T687
T700
BSP318S
T701
BSP318S
Table 1 BOM of populated parts
This list is NOT to be shown to third parties!!!
Parts used in Hella schematic part that is to be approved.
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