User Manual

Document No. Title Page
5AX000XX00 Product Specification
Background
Passive Entry System
FORMAT NO. FIRMWARE_A(VER 0.01)
2. Passsive Accsess Entry Functionality
A proximity sensor located on, for example the door handles, mirrors and trunk lid will be used for proximity check
if user is in neighborhood of the vehicle. The switch input will trigger for unlocking and open the doors and trunk.
Figure 1
2.1.Door Unlocking
• User pull / touch the door handle (sensing of door handle switch).
• ECU sends LF-challenge via exterior antenna.
• FOB sends RF-response to the ECU.
• Door unlocking status is engaged.
• Doors are opened.
Figure 2
Proximity sensor
Switch input (door handle)
LF
RF
FOB