Viper RT-10 V10-8.0L VIN E (1997)
coupe). When the liftglass is opened, the outer shell of the gas prop allows a micro switch to close and the liftglass ajar circuit is grounded. The
EM monitors this circuit and knows the glass is open. If the liftglass is broken, the prop will extend and trip the alarm. By utilizing a prop switch in
this manner, the vehicle is protected against opening or breakage of the liftglass. The roadster trunk latch and key cylinder are not protected by the
theft system. Opening of the trunk when the theft alarm is armed will not cause it to be tripped.
The key fobs are unique to Viper and utilize a rolling code system. The rolling code feature changes a portion of the key fob message each time it
is used. The key fob message and the receiver message change together. Under certain conditions with a rolling code system, the receiver and
transmitter can fall out of synchronization. By pressing the lock and unlock buttons together, and holding until the horn chirps, the system will
re-synchronize. The system will take 5-10 seconds to respond with a horn chirp and normal operation resumes. This is not the same as
programming a key fob.
The system will accept up to four fob codes and the system can be programmed with either the DRB III or by connecting a programming wire to
ground and placing the module in programming mode. If the system is set up for programming, all key fobs for this vehicle must be programmed
at the same time. When the module is placed in the program mode, all previous information from the transmitters is erased and no information is
written there until the system recognizes a valid key fob. Pressing both lock and unlock buttons on the key fob at the same time will cause the
system to respond with a horn chirp after approximately ten seconds. Then any other transmitters may be programmed. There is a time out after 60
seconds of inactivity (no further transmitters recognized). If the system times out, it will have to be returned to the programming mode with the
DRB III or by disconnecting and re-connecting the green programming wire located near the module connectors. The DRB "Theft Alarm Monitor
Screen" contains information about how many fobs have been programmed and if a valid fob message has been received. The horn chirp feature
can not be disabled.
Diagnostics
The EM system is fully addressable with DRB III and it is the recommended method for diagnosis. The EM system does not display any
Diagnostic Trouble Codes. All of the input switches to the EM can be read with DRB under the I/O screen. The doors can be unlatched with the
DRB under actuator tests. If the inputs are OK and the outputs can be cycled with the DRB, the problem is usually the Entry Module.
