Directed Electronics Viper 5904 Installation Manual page 2

Bitwriter®, Code Hopping™, Doubleguard®, ESP™, Fail-
Safe®, Ghost Switch™, Learn Routine™, Nite-Lite®, Nui-
sance Prevention® Circuitry, Revenger®, Silent Mode™,
Soft Chirp®, Stinger®, Valet®, Vehicle Recovery System®,
VRS®, and Warn Away® are all Trademarks or Registered
Trademarks of Directed Electronics.
The Bitwriter
requires chip version 2.7 or
newer to program this unit.
Bitwriters with a date code of 6a or older require an IC upgrade (p/n
998M). Some bitwriters with a date code of 6B do not require the IC
upgrade, refer to tech tip # 1112 for more information.
(p/n 998U)
®