A remote control transmitter configured to operate with a vehicle controller. The transmitter is operable in an active mode and a passive mode. In the active mode the disarm/unlock command is sent by user activating a switch. In the passive mode the disarm/unlock command is automatically sent by the transmitter without the user having to activate any switches on the transmitter. The transmitter is configured to switch from the passive mode to the active mode in response to at least one of a user activated signal or a battery threshold signal.