82D-14
MR-413-X44-82D000$500_eng.mif
V1
82D
ACCESS/SAFETY
Fault finding - Function
Access/Safety function layout
Access (RF*) and protection (immobiliser) middle and top of the range vehicles:
The access function (locking/unlocking) is provided by the UCH and the key.
Exchanges between the key and the UCH are carried by radio frequency transmission at 433 MHz.
When the switch is pressed, the key sends out a radiofrequency wave signal. The UCH receives the signal via its
built-in aerial.
The UCH authenticates the key and performs the user request if the key is allocated to the vehicle.
Access via radiofrequency:
PROTECTION (Immobiliser)
*RF: Radio frequency
Key
UCH
–Authentication of the key
–Door locking system
Radio frequency
signals
Magnetic field used as communication
medium between the key transponder and
the transponder aerial
Key +
transponderTransponder aerial
MR-413-X44-82D000$500_eng.mif
