A vehicle communication system mounted in the vehicle and a portable fob
for carrying by a user are provided. The vehicle communication system
comprises a trigger generator, an LF transmitter for broadcasting an LF
wakeup signal, and an RF transmitter for broadcasting a UHF status
message including vehicle status data. The vehicle communication system
broadcasts a challenge signal after the LF wakeup signal. The portable
fob comprises an LF receiver responsive to the LF wakeup signal, a fob
controller for determining response data, and an RF transmitter for
broadcasting a UHF response signal incorporating the response data. The
portable fob further comprises an RF receiver for receiving the vehicle
status data, a visual display for visually reproducing the vehicle status
data, and a manual input key for activating the fob controller to
generate a remote control message. The RF transmitter in the portable fob
broadcasts a UHF control signal incorporating the remote control message.
The vehicle communication system further comprises an RF receiver
responsive to the UHF control signal and a base controller for initiating
a corresponding remote control function in response to the UHF control
signal.