Continental Automotive MARSKEYLESS Electronic Control Unit User Manual Projekt

Continental Automotive GmbH Electronic Control Unit Projekt

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Users Manual

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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Table of Content
General Information ............................................................................................2
LF- Performance in Typical Application ............................................................3
2.1
2.2
HW-Description ...................................................................................................6
3.1
3.2
3.3
3.4
3.5
LF Antenna Positions in Vehicle .............................................................................4
Authentication Ranges Inside and Outside the Vehicle ...........................................5
DAIMLER MARS ECU ............................................................................................6
ECU Layout ............................................................................................................6
ECU Schematic ......................................................................................................8
BOM (Populated Parts) of Hella Part ......................................................................9
Block Diagram of Related Functional Modules ......................................................11
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
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
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
Hella 8303EN_GE (2004-09)
Test Set Up for Homologation.......................................................................... 24
7.1
7.2
7.3
7.4
Setup in Block Diagram View ................................................................................24
ECU and Connector Pinning for Hella design part ................................................25
Components on Setup ..........................................................................................26
Schematic .............................................................................................................27
Housing views including Label ........................................................................ 28
PHOTOS ............................................................................................................. 29
10 Warning statement and Label information ..................................................................................31
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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:
Hella 8303EN_GE (2004-09)
MARS Keyless
Author:
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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
Hella 8303EN_GE (2004-09)
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.
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
2.1
LF Antenna Positions in Vehicle
IN1
side LF antenna driver (left)
side LF antenna passenger (right)
IN2
Hella 8303EN_GE (2004-09)
Fig. 1 Antenna Positions at a Keyless Entry / Keyless Start Vehicle
Author:
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Process
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
2.2
Authentication Ranges Inside and Outside the Vehicle
outside detection
outside rear
detection
inside detection
outside detection
approx. 180cm
approx. 180cm
Hella 8303EN_GE (2004-09)
Fig. 2 Principle of Magnetic Field Detection Areas
Author:
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
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 (not in focus, it’s Continental part).
Hella 8303EN_GE (2004-09)
3.2
ECU Layout
Fig. 3 Layer 1
Fig. 4 Layer 2
Fig. 5 Layer 3
Fig. 6 Layer 4
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Hella 8303EN_GE (2004-09)
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
Author:
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
ECU Schematic
Hella 8303EN_GE (2004-09)
3.3
Fig. 10 Schematic of LF Driver Part of MARS EIS ECU
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Hella 8303EN_GE (2004-09)
BOM (Populated Parts) of Hella Part
C600
C601
C602
C603
C604
C605
C606
C607
C608
C609
C610
C611
C612
C613
C614
C615
C616
C617
C655
C656
C657
C658
C659
C670
C671
C672
C673
C674
C685
C686
C687
C688
C700
C701
C702
C703
C704
C705
C706
C707
C708
C709
C710
C712
C714
C715
C716
C717
C718
C719
C720
C721
C722
C723
C724
C725
C726
D600
D601
D602
D603
D604
D605
D655
D656
100p
100p
10n
390p
1n
1n
220n
220n
1n
1n
10n
10n
100n
560p
47u
100n
15n
470n
100p
220n
1n
10n
15n
100p
220n
10n
15n
1n
100n
560p
390p
100n
100n
4.7n
10n
4.7u
4.7u
4.7n
10u
4.7n
100n
4.7n
4.7n
4.7n
4.7n
4.7n
4.7n
3.3u
4.7n
220u
100n
220n
220n
220n
10n
1n
330u
SBAS40LT1G
BAT54
BAT54
BAS21
SS2H10HE3
BAV70
BAT54
BAV70
D670
D685
D700
D701
IC002
IC685
L700
L701
R600
R601
R602
R603
R604
R605
R606
R607
R608
R609
R610
R611
R612
R613
R614
R615
R616
R617
R618
R619
R620
R621
R622
R623
R624
R625
R626
R627
R628
R629
R630
R631
R632
R633
R634
R635
R636
R637
R638
R639
R640
R641
R642
R643
R644
R645
R647
R648
R655
R656
R657
R658
R659
R660
R661
R662
R663
BAT54
SBAS40LT1G
SS2H10HE3
SS2H10HE3
ATA5291
HEF40106BT
47u
47u
10k
49.9k
22k
10k
10k
100k
22k
49.9k
100k
499
115
10k
1,24
49.9k
100k
499
100k
1k
33.2k
100k
165
100k
100k
22k
49.9k
100k
100k
5.62k
100k
22k
10k
165
100k
1k
33.2k
10k
100k
10k
100k
10k
4.99k
49.9k
165
165
165
165
100k
1k
49.9k
100k
100k
165
499
100k
22k
10k
100k
R664
R665
R666
R667
R670
R671
R672
R673
R674
R675
R676
R677
R678
R679
R680
R681
R682
R683
R685
R686
R687
R688
R689
R690
R701
R702
R703
R704
R705
R706
R707
R708
R709
R710
R711
R712
R713
R714
RN700
RN701
RN702
T600
T601
T602
T603
T604
T605
T606
T607
T608
T609
T610
T611
T612
T613
T614
T615
T616
T617
T618
T619
T620
T621
T622
T623
1k
33.2k
10k
100k
49.9k
100k
100k
165
499
100k
22k
10k
100k
1k
33.2k
10k
100k
100k
100k
49.9k
115
22k
10k
3.3k
100k
442
47k
50m
47k
50m
50m
2.2k
50m
44.2k
442
4,7
10k
2.2k
100k
SMUN5313DW1
SMUN5313DW1
SMMUN2213LT3
BC817C
SMMUN2213LT3
BC817C
SMMUN2213LT3
BC817C
SMUN5313DW1
BC807C
BC807C
NVTFS5124PL
SQ3427EV
SMUN5313DW1
SMUN5313DW1
SMUN5313DW1
SMUN5313DW1
SQ3427EV
SMMUN2213LT3
SQ3427EV
BC807C
BC807C
BC807C
BC817C
This list is NOT to be shown to third
parties!!!
3.4
Parts used in Hella schematic part that is to be approved.
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
BC817C
BC817C
SMUN5313DW1
SQ3427EV
SMUN5313DW1
BC807C
BC807C
BC817C
SMUN5313DW1
SQ3427EV
SMUN5313DW1
BC807C
BC807C
BC817C
SMMUN2213LT3
BC817C
BSP318S
BSP318S
This list is NOT to be shown to third
parties!!!
T624
T655
T656
T657
T658
T659
T660
T670
T671
T672
T673
T674
T675
T685
T686
T687
T700
T701
Parts used in Hella schematic part that is to be approved.
Hella 8303EN_GE (2004-09)
Table 1 BOM of populated parts
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Block Diagram of Related Functional Modules
Hella 8303EN_GE (2004-09)
3.5
Fig. 11 Block diagram of modules in the ECU, LF driver in orange marked area
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
4 LF-Driver Hardware Module with 5291
Fig. 12 Block diagram, architecture of Hella part
Hella 8303EN_GE (2004-09)
Fig. 13 Block diagram, LF driver module
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Process
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
4.1
Functional Description
4.1.1 General Function
The ATA5291 is the main part of generating a f=125kHz signal and drive it through four series resonant
circuits, called LF antennas.
It is an ASIC with a sine-wave-generation circuitry to avoid noise in the AM-Band.
4.1.2
PEPS Tx Mode
Hella 8303EN_GE (2004-09)
Fig. 14 Extract from Datasheet
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
4.1.3
Immo TxRx Mode
Hella 8303EN_GE (2004-09)
Fig. 15 Extract from Datasheet
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
5 LF-Antennas
The LF antennas generate the magnetic field that is needed for wireless communication between car
electronic components and the UID that is carried with by the end-user.
Each LF antenna that is plugged to the ECU is a LCR resonant circuitry:
Fig. 16 LF Antenna, RLC resonant circuit
Hella 8303EN_GE (2004-09)
Fig. 17 LF-Antenna, Impedance Z
The LF antennas transmit the LF challenge signals (data) and the LF carrier wave signals. They are
activated by the MAR EIS ECU using a controlled current.
ALL LF Antennas have the same efficiency.
The efficiency of all antennas is Hmax(@l=1m, @IANT=500mA) =77,5 dBµA/m.
The general measurement of the efficiency of the antennas is shown is this picture:
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Process
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Fig. 18 LF-Antenna Efficiency Test Setup
The used LF antenna for homologation setup (the same as inside the car) has the following typical
electrical parameters and is equal to ALL possible antennas in the system:
fres = 125kHz
L = 326µH
R = 8Ohm
Z@125kHz = 12…18 Ohm
5.1
Documentation C2-Sample
Hella 8303EN_GE (2004-09)
5.1.1
Connection Schematic 207.308-00, A167 905 47 00
LF1 IMMO
LF Mid_Immo
LF2 IMMO
Fig. 19 Antenna Schematic
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
5.1.2
Picture of the C2-Sample Antenna
4.7nF
8Ohm
Hella 8303EN_GE (2004-09)
2.1Ohm
326µH
Fig. 20 Antenna housing and pinning
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
5.1.3
Mechanical Parameter
Hella 8303EN_GE (2004-09)
Fig. 21 Extract of the antenna part description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
6 Software for LF Transmitter Mode (Data and CW) for
Homologation
The LF Transmission for Homologation Purpose is an original LF Scan for a Passive Entry / Passive
Exit action.
The LF driver IC is especially made for driving an electric current at f=125kHz with a certain modulation
and bit structure. Only short burst shall be sent out at different antennas channels in a certain timing.
It is NOT possible to drive the antennas with a continuous carrier signal. The maximum of
carrier (unmodulated) signal length that can be driven – and is driven for magnetic field strength
measurement in the UID – is tcarrier=5,2ms.
The SW of the ECU has two small changes in comparison to the mass production software:
First:
As the setup is connected to the power supply (V = 12V / I = 5A) and the lever is set to “Open – LF
Mode”, an LF data scan is automatically generated on all four antennas with a time gap of 23ms
between each antenna and a pause of 273ms after the last antenna.
So, a continuous repetitive scanning is created, that is similar to the system reaction, as if a person is
grabbing the door handle to enter the locked vehicle every 370ms with not having the UID in detection
range.
Second:
As the setup is connected to the power supply (V = 12V / I = 5A) and the lever is set to “GND – IMMO
Mode”, an Immo transponder start is automatically generated on the IMMO-antenna every 3,25s.
After a successful keyfob answer the LED is powered for 100ms.
IMPORTANT NOTE: This Second functionality is only allowed to be used 1 Minute and then a power
down of 2 Minutes is needed. Otherwise the protocol won’t finish completely and the LED won’t light up
due to warmup of the ECU. In mass production / series such a stress never would occur!
To switch between those two functions simply turn the lever in the designated position and
perform a power-on reset.
There are no other SW changes to the mass production software.
The scope-diagrams in the following are taken by a simple AIR-COIL (15 windings, 4cm diameter),
which is positioned near to the test setup. This coil is connected to a 150MHz Scope Probe (x10).
Hella 8303EN_GE (2004-09)
With this SW FOUR ANTENNAS are mentioned to the system.
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
6.1
LF Data Scan
6.1.1
Single Transmission LF Scan
5,2ms
Fig. 22 Scope Shot from complete single LF scan
6.1.2
Single Transmission – f = 125kHz Oscillating Signal
The ECU drives a sinusoidal output signal. The frequency is f=125kHz. The magnetic field as the result
is oscillating the same:
Hella 8303EN_GE (2004-09)
8µs
Fig. 23 Oscillating signal at f=125kHz
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
6.1.3
Repetition of Transmissions
All four LF-antennas are powered and the LF scan is repeated frequently due to homologation purpose:
370 ms
23 ms
273 ms
Hella 8303EN_GE (2004-09)
Fig. 24 LF-Signal repetition
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
6.2
IMMO Transponder Start
6.2.1
Single Transponder Start and Repetition of Transmissions
3,25 s
1,25 s
2s
860 ms
Hella 8303EN_GE (2004-09)
Fig. 25 Scope Shot of Transponder Transmission
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
6.2.2
Data Transmission
28 ms
Hella 8303EN_GE (2004-09)
Fig. 26 Scope Shot of Data Transmission in in the Transponder Protocol
Author:
Dept.:
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Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
7 Test Set Up for Homologation
Setup in Block Diagram View
LF Antenna Left
LF Antenna IN IMMO
LF Antenna IN Back
12V (red)
GND (blue)
7.1
LF Antenna Right
Keyfob
MARS EIS ECU
Function
Control Box
Hella 8303EN_GE (2004-09)
Fig. 27 Block diagram of the Test Setup
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
7.2
ECU and Connector Pinning for Hella design part
Connector Name
LIN-HFA
DATA TAG FT
DATA TAG BFT
DATA TAG HL
DATA TAG HR
KL30_TAG NFC FT
Hella 8303EN_GE (2004-09)
LF Mid_IMMO
LF2 IMMO
LF2 hinten
LF2 rechts
LF2 links
free (reserved for LF2)
Author:
Dept.:
Sebastian Henke Doc. name:
Process
E-B-D2-HW
PIN
PIN
(inside)
(outside)
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
10
11
12
13
14
15
16
17
18
19
20
Connector name
EDS_HF
GND TAG BFT
GND TAG HL
GND TAG HR
GND TAG FT
LF1 IMMO
LF1 hinten
LF1 rechts
LF1 links
free (reserved for LF1)
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
7.3
Components on Setup
Ant 2 IN Back
Ant 3 Left
Ant 1 IN IMMO
Ant 4 Right
MARS EIS ECU
Power Supply
Hella 8303EN_GE (2004-09)
Fig. 28 Components on setup
Author:
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Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
7.4
Schematic
EIS / Gateway Part
FLEXRAY_BP_3
FLEXRAY_BM_3
FLEXRAY_BP_4
FLEXRAY_BM_4
FLEXRAY_BP_5
FLEXRAY_BM_5
FLEXRAY_BP_6
FLEXRAY_BM_6
FLEXRAY_BP_7
FLEXRAY_BM_7
FLEXRAY_BP_8
FLEXRAY_BM_8
CAN_HMI_HIGH
CAN_HMI_LOW
CAN_PERI_HIGH
CAN_PERI_LOW
CAN_DIAG_HIGH
CAN_DIAG_LOW
38
16
GND
31
11
32
12
34
14
35
15
Hella 8303EN_GE (2004-09)
CAN_BODY_HIGH
CAN_BODY_LOW
21
22
23
24
25
26
27
28
Continental
FLEXRAY_BP_1
FLEXRAY_BM_1
FLEXRAY_BP_2
FLEXRAY_BM_2
12V
Author:
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Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Reserved LF
Reserved LF
39
19
Ant 1 (links)
38
18
Ant 2 (rechts)
37
17
Ant 3 (hinten)
36
16
Ant 4 (IMMO)
35
34
15
Mode Switch(EDS_HF)
Hella
Keyless Start Part
Hella 8303EN_GE (2004-09)
8 Housing views including Label
Fig. 29 Housing Top view (1) with details (2D)
Author:
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E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Fig. 30 Label (2D)
Hella 8303EN_GE (2004-09)
9 PHOTOS
Fig. 31 MARS EIS ECU PCBA Top View
Author:
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Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Hella 8303EN_GE (2004-09)
Fig. 32 MARS EIS ECU PCBA Top View with important module marked
Fig. 33 MARS EIS ECU PCBA Bottom View
Author:
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Process
E-B-D2-HW
Hardware Description
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DAIMLER MARS EIS ECU – Homologation of LF-Driver Part
Fig. 34 MARS EIS ECU PCBA Bottom View with important module marked
10 Warning statement and Label information
According to 47 CFR 15.19 (labeling requirements) the car manufacturer will print the
following text in the
appropriate User's Manual of the car:
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.
Hella 8303EN_GE (2004-09)
Usually this is followed by the following FCC caution:
Any changes or modification not expressly approved by the party responsible for compliance
could void the user's authority to operate this equipment.
Author:
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Process
E-B-D2-HW
Hardware Description
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