Code Hopping - Viper ESP 540 Owner's Manual

ZONE
(Number of
DESCRIPTION
LED Flashes)
1
Instant trigger - hood pinswitch
2
Instant trigger - a heavier impact
detected by the shock sensor
3
Door switch trigger
4
Instant trigger - for optional
sensors
5
Ignition trigger
NOTE: Your system stores the last two triggered zones in memory. If your
system has been triggered but the LED has been reset by turning on the
ignition, your dealer can still recall the last two zones that were trig-
gered. Contact your dealer for details.

Code Hopping

The receiver and transmitters use a mathematical formula called an
algorithm to change their code 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
remote has been pressed many times out of range of the vehicle,
or the battery has been removed, it may fall out of sync with the con-
trol unit and fail to operate the system. To re-sync the remote sim-
ply press several times within range of the vehicle. The alarm
will automatically re-sync and respond to the transmitters normally.
1999 Directed Electronics, Inc.
©
DEALER-INSTALLED
OPTIONS
23