SMART/PROXIMITY SYSTEM OPERATION
TDB003
!
PAGE 5
VERSION 1.6
!
26/05/2015
OPERATION
The Smart/Proximity key receives low frequency signals on 125kHz or 134kHz
frequency.
The key has a transponder, which when you operate the vehicle door by either pulling
the handle or pressing the button (This varies on vehicles and models) the
transponder is energised through a 125kHz or 134kHz signal. The key then responds
to the vehicle on a higher RF frequency 433MHz or 315MHz sending a security
message.
If the vehicle and the key communicate with the correct security messages, then the
vehicle will open the door and allow the starting of the vehicle using the start/stop
button.
There are a number of sensors transmitting the 125KHz/134KHz signal around the
vehicle, normally in the doors, boot/trunk, external bumper, centre console, rear
seats, glove box area etc, depending on the make and model.
