User's Manual

Technical Description and User’s Manual of the ……….
<Department> - <Name> Page 3 of 6 01.04.19
Huf Hülsbeck & Fürst
1 General operation of the product
The User Identification Device (UID) is a user transported device that has various features such as the
remote keyless entry (RKE) transmitter, passive keyless entry (PKE), passive keyless go (PKG) and
Immo that serves for both security and transponder backup. The UID is integrated with a mechanical key
blade.
Theory of Operation:
The RKE feature is most common operational mode that allows for remote locking and unlocking the car
and other functions as assigned on each of the buttons on the keyfob. The user manually presses the
buttons on the fobs to initiate these commands. Once a button press is detected, the UID wakes up from
sleep mode and validates the button push after which it passes the encrypted data to the BCM through
RFR. The BCM interprets the data and releases command to perform the required function after the UID
ID is validated.
2 Operating frequencies of RF transferral
Inter-Component Communication Supported:
UHF to RFR
UID from PEPS LF and Immo LF
• 434MHz carrier frequency
• 3 channels (L, C, H)
• PEPS => FSK @ 19.2Kbps
• RKE => ASK @ 8.640Kbps
• 3.9Kbps data rate
• 125KHz carrier
The PEPS functionality- which is passive keyless entry (PKE) and passive keyless go (PKG) is activated
by the user by either touching the door handle or pushing the Start/Stop button in the car. The BCM
commands the PEPS LF drivers to transmit data through the LF Antennas at LF frequencies. A UID in
proximity to these antennas receives and decodes the data. The UID then responds with both
unencrypted and encrypted data to the BCM through RFR. The BCM interprets the data to invoke the
required function after correct UID validation. PEPS uses 125KHz to locate the UID through LF antennas
located both inside and outside the vehicle.
The LF Immobilization mode is intended communicate to the UID in a very secure way.
The BCM
communicates bi-directionally to the UID by way of the PEPS LF drivers and the LF Immo Antenna. The
UID receives and transmits data to/from the BCM through the LF data link. Once the BCM validates the
UID, it can allow a vehicle start operation.
Individual transmission on the 434 MHz will never exceed the
500 ms.