Vehicle tire pressure monitor

1. A vehicle monitoring system comprising:

a tire pressure sensor;

a transmitter coupled to the tire pressure sensor for wirelessly transmitting a signal indicative of a tire pressure;

a receiver for receiving the signal indicative of the tire pressure and for receiving a signal of a remote keyless entry device;

a controller coupled to the receiver for processing the signal indicative of the tire pressure and outputting a status signal; and

a status indicator for receiving the status signal and indicating a tire pressure status according to the status signal.

2. The vehicle monitoring system of claim 1 , wherein the transmitter and the remote keyless entry device transmit signals on a shared frequency, wherein the signals are received by the receiver.

3. The vehicle monitoring system of claim 1 , wherein the transmitter and the remote keyless entry device transmit signals on different frequencies, wherein the signals are received by the receiver.

4. The vehicle monitoring system of claim 1 , wherein the remote keyless entry device comprises the status indicator.

5. The vehicle monitoring system of claim 1 , wherein the controller comprises a timer, wherein the controller periodically polls the tire pressure sensor.

6. The vehicle monitoring system of claim 1 , wherein the tire pressure sensor is responsive to a signal of the remote keyless entry device for controlling a security system.

7. The vehicle monitoring system of claim 1 , comprising a power source coupled to the tire pressure sensor.

8. The vehicle monitoring system of claim 7 , wherein the power source is a battery.

9. The vehicle monitoring system of claim 7 , wherein the power source is a transducer for converting a signal into a current.

10. The vehicle monitoring system of claim 9 , wherein the signal is transmitted by the remote keyless entry device.

11. The vehicle monitoring system of claim 9 , wherein the signal is transmitted by the controller.

12. A vehicle monitoring method comprising:

generating a signal for controlling a vehicle security system;

receiving the signal for controlling a vehicle security system at a tire pressure monitor;

generating a tire pressure signal in response to the signal for controlling the vehicle security system; and

receiving the signal for controlling a vehicle security system and the tire pressure signal at a controller.

13. A vehicle monitoring method of claim 12 , further comprising:

performing an operation of the vehicle security system according to the signal for controlling a vehicle security system; and

generating a indication of tire pressure in response to the tire pressure signal.