Viper 350 Plus Owner Manual - Page 22

Code hopping The receiver and transmitters each use mathematical formulas called al­go­rithms to change their codes each time the transmitter is used. This technology has been developed to increase the security of the unit. The control unit knows what the next codes should be. This helps to keep the transmitter "in sync" with the control unit even if you use the remote control out of range of the vehicle. However, if the transmitter has been pressed many times out of range of the vehicle, or if the battery has been removed, it may get out of sync with the control unit and fail to operate the system. To re-sync the remote control press of the transmitter several times within range of the vehicle. The alarm will aut­o­mat­i­cal­ly re- sync and respond to the trans­mit­ters nor­mal­ly. 20 © 2008 Directed Electronics- All rights reserved.