HELLA and KGaA 10176 Inductive Transmitter for Keyless Entry User Manual UserMan

Hella KGaA Hueck & Co. Inductive Transmitter for Keyless Entry UserMan

Contents

UserMan

1May 20, 2009
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
1
Hella Kessy for
Volkswagen
ECU, LF-Antennas, UID
5ZA 010 176 – 00
2May 20, 2009
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
2
Hella Kessy for Volkswagen
Functional Description for Vehicle Application, Hella Carbody Components
Standard version Keyless Entry and Start System
with 5ZA 010 176 - 00
outside detection
outside detection
inside detection
outside rear
detection
trunk
separation
appr. 180cm
appr. 180cm
Kessy ECU 5ZA 010 176 - 00
3 interior LF antennas
3 exterior LF antennas
3May 20, 2009
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
3
Hella Kessy for Volkswagen
Functional Description of Procedure with 5ZA 010 176 – 00
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 IN2 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 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 10cm outside the
vehicle) the car won’t start.
outside detection
outside detection
inside detection
outside rear
detection
trunk
separation
appr. 180cm
appr. 180cm
Kessy ECU 5ZA 010 176 - 00
3 interior LF antennas
3 exterior LF antennas
Keyless Entry and Start System
4May 20, 2009
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
4
Hella Kessy for Volkswagen
Functional Description of Procedure with 5ZA 010 176 – 00
outside detection
outside detection
inside detection
outside rear
detection
trunk
separation
appr. 180cm
appr. 180cm
Kessy ECU 5ZA 010 176 - 00
3 interior LF antennas
3 exterior LF antennas
Entry:
A Person with the UID nears to the locked
vehicle. If he graps the door handle a
capacitive unlock sensor 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 judged 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.
Keyless Entry and Start System
5May 20, 2009
Confidential.The contents may only be passed on, used or made known with our express permission. All rights reserved.
5
Hella Kessy for Volkswagen
Functional Description of Procedure, Hella Devices for Passive Entry and Start
User
Identification
Device
INTERIOR LF antenna
INTERIOR LF antenna
INTERIOR LF antenna
Keyless
Entry and
Start
System
Electronic Control Unit
5ZA 010 176 – 00
transmitting frequency
f = 125kHz
EXTERIOR LF antenna
EXTERIOR LF antenna
EXTERIOR LF antenna
Body
Control
Module
with integrated RF - Receiver
transmitting frequency
f = 315MHz or 433MHz
NOT in TEST-focus!!!

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