Viper 571XV Owner Manual - Page 28
code hopping
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➜ over and under rev protection The system monitors the engine speed and will automatically shut the engine off if the RPMs rise above or fall below the programmed levels. This feature prevents damage to the motor due to fuel delivery system failures or other problems which may cause the engine to race. note: The system uses a wire connected to the vehicle to sense engine speed. This wire must be connected in order for over and under rev protection to work. ➜ shut down inputs This system uses several inputs to shut down the remote start operation of the motor or prevent remote start if certain inputs are active. These are the hood and brake inputs. The hood input will prevent the motor from starting, as well as shut it down, any time the hood is opened. The brake pedal will shut down the motor at any time during remote start operation, as well as preventing the remote start from activating while it is being pressed. code hopping The receiver and 2-way remotes use a mathematical formula called an algorithm to change their code each time the 2-way remote 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 2-way remote "in sync" with the © 2005 directed electronics-all rights reserved 25