SIEMENS Automotive systems Corp. SASCO
Functional Description /
User Manual
SIEMENS Automotive Systems Corp.
Radio frequency remote control system
for
TG/EN/BH of HMC
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SIEMENS Automotive systems Corp. SASCO
FCC Compliance Statement.
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.
Do Not.
Any changes or modifications to the equipment not expressly
approved by the party
responsible for compliance could void user’s authority to operate
the equipment.
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SIEMENS Automotive systems Corp. SASCO
FUNCTIONAL DESCRIPTION
1 System Components
This is a remote keyless entry (RKE) system of a vehicle for TG/EN/BH of HMC. It
consists of the Stand alone- type receicer(SRx) which is corresponding the RKE
transmitter. SRx has implemented on board with RF generic receiver device
The described system is a radio-frequency remote controler for central doors locking /
unlocking, trunk release and panic activities. This system will be a part of the equipment of
the HMC TG/EN/BH vehicles.
The system is composed of the following ones:
- transmitter with 3/4 buttons (doors locking, door unlocking, trunk release and panic)
*Panic is applied just for 4buttons variant.
System Operation:
To serve a remote keyless entry system remote keyless entry function is provided by the
RF system of the SRx and the RKE transmitter. The functions are operated as below.
Identifier
Start code
RF
emission
Host
BCM
Communication
Line
Remote keyless Entry:
The RKE transmitter transmits at 433.92 MHz for Europe ( or 315MHz for NA, CHN) an
FSK modulated data signal to the SRx. The RF system of SRx receives this encrypted RF
signal. The SRx send the signal to corresponding the host Body control module through
single wired K-line bus then the host module broadcasts the requested remote commands
to the appropriate control modules in the vehicle through CAN –communication line . In
general the following functions are provided:
- Lock the doors
- Unlock the doors
- Release the trunk
- Panic Alam (applying just for 4button)
RF Key
SRx
receiver
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SIEMENS Automotive systems Corp. SASCO
2 Variants:
Freq. Button Country Model No.
315MHz
433MHz
315MHz CHN
433MHz
4
3
NA
CHN
EU
EU
SVI-2NDFNA04
SVI-2NDFCH04
SVI-2NDFEU04
SVI-2NDFCH03
SVI-2NDFEU03
3 Block diagram
3.1 Block diagram RKE transmitter(for 315/433.92MHz):
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SIEMENS Automotive systems Corp. SASCO
4 Technical Data transmitter
Carrier frequency: 315.00MHz± 150kHz / 433.92MHz ± 150kHz
Output power: < 10mW (EU, CHN)
< 75.6dBuV/m (NA)
Modulation: FSK
Frequency Generation: PLL device
Number of channels: 1
Supply voltage: 3 V
Battery type: Lithium, CR 2032
Range: > 10m
8. Typical usage pattern RKE transmitter
30 lock / unlock operations in 24 hours with a typical transmission duration of
270 milliseconds → 1.25 lock / unlock operations / hour
Transmitter ON 0.3375 seconds / hour
Transmitter OFF 3,599.6625 seconds / hour
Duty Cycle: TON / T
(ON+OFF)
x 100% = 0.3375 / 3,600 x 100 % = 0,009 %
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