Passive Entry - Locking/Unlocking Process

The vehicle unlocking procedure is carried out in the following way.

With the key within one meter of the approached door and the handle grasped a signal is sent to the KVM which responds with the following simultaneous actions:

• The KVM energizes the low frequency antenna in the door handle which transmits a 125 KHz signal to the key.
• On receipt of the low frequency signal the Smart Key transmits a radio frequency signal '433.92 MHz Europe' '315 MHz NAS / ROW' containing its authorization code to the RF (radio frequency) receiver.
• The RF receiver relays the code, via a serial communication line, to the KVM which checks and approves the code as valid.
• The KVM will only respond if the radio frequency signal produced is from a valid key for the vehicle.
• The KVM transmits the unlock request to the central junction box (CJB) via the medium-speed controller area network (CAN) bus.
• The central junction box (CJB) confirms and sends the request, via the medium speed controller area network (CAN) bus, to the front door modules.
• The front door modules respond with the following simultaneous actions:
• Drive the motors to unlock the front doors.
• Transmit the door unlock request via a local interconnect network (LIN) data signal to the rear door modules.
• The rear door modules drive the motors to unlock the rear doors.
• When the door handle reaches 80 percent of its travel the handle clutch switch is closed and grounded sending a hardwired switched signal to the KVM.
• The KVM drives the fast latch release motors in the door latch assemblies releasing the door latches as the approached door handle is pulled through its full travel, the door can be opened.