HELLA and KGaA 009768T Keyless Car Entry User Manual
Hella KGaA Hueck & Co. Keyless Car Entry
Contents
- 1. Annex to User Manual
- 2. User Manual
User Manual
Annex No.5
Page 1 of 8
Functional description / User manual
5FA 009 768-40 / -70
5FA 010 007-30 / -40 / -50 / -60
5FA 010 381-30
1September 12, 2008
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
1
Hella
Passive Entry Passive Start System (PEPS)
for General Motors
User Identification Device (UID)
5FA 010 007-30 /-40 /-50 /-60
5FA 010 381-30
5FA 009 768-40 /-70
2September 12, 2008
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
2
Hella PEPS for GM
Functional Description of Passive Start
PEPS ECU
3 interior LF antennas
UID
Start:
A Person with the UID inside of the vehicle is
pressing the Start-Stop-Switch. The Start-
Stop-Switch activates the complete Passive
Start protocol:
The interior antenna IN is transmitting the LF
Data and a carrier signal, which can be
recognized and evaluated by quantity (RSSI-
measurement) by the UID. The other two
interior antennas IN and TRUNK 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 10 cm outside the
vehicle) the car won’t start.
inside detection trunk
separation
3September 12, 2008
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
3
Hella PEPS for GM
Functional Description of Passive Entry
PEPS ECU
3 interior LF antennas
3 exterior LF antennas
UID
Entry:
A Person with the UID approaches the
locked vehicle. If he graps the door handle a
micro switch is activated and the complete
Passive Entry Protocol is started:
The door handle antenna is transmitting LF
data and a carrier signal, which can be
recognized and evaluated by quantity (RSSI-
measurement) by the UID.
If the magnetic field strength is high enough
(a certain border is reached) the UID stays
“awake” for additional LF communication by
the other antennas driven sequentially.
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.
outside detection
outside detection
inside detection
outside rear
detection
trunk
separation
appr. 180cm
appr. 180cm
4September 12, 2008
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
4
Hella PEPS for GM
Functional Description of Procedure, Hella Devices for Passive Start
Radio
Frequency
Amplifier module
Body
Control
Module
transmitting frequency
f = 125kHz
transmitting frequency
f = 314,9 MHz
INTERIOR LF antenna
INTERIOR LF antenna
INTERIOR LF antenna
Passive
Entry
Passive
Start
Electrical Control Unit
UID
5September 12, 2008
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
5
Hella PEPS for GM
Functional Description of Procedure, Hella Devices for Start
Radio
Frequency
Amplifier module
INTERIOR LF antenna
INTERIOR LF antenna
INTERIOR LF antenna
Body
Control
Module
Passive
Entry
Passive
Start
Electrical Control Unit
transmitting frequency
f = 125kHz
EXTERIOR LF antenna
EXTERIOR LF antenna
EXTERIOR LF antenna
UID
transmitting frequency
f = 314,9 MHz