Viper 4811V Owner's Manual page 38

Initializing Virtual Tach (not needed w/hardwire and data tach
inputs)
To program Virtual Tach:
1. After the install is complete, remote start the engine. The programming operation may require 3 cranks
of the starter before the engine starts and runs. Do not turn OFF the remote start if this happens, it is a
normal programming operation.
2. Once the engine begins running, let it run for at least 30 seconds.
3. Using the Remote, send the Remote start command to turn remote start OFF. Virtual Tach is
programmed. (To reset Virtual Tach, see the Reset and Deletion section of this guide). Virtual Tach
cannot be reset with the Bitwriter.
Note: Virtual Tach cannot be used in MTS (Manual Transmission Mode). It is also not recommended for diesel
vehicles.
Virtual Tach handles disengaging the starter motor during remote starting – it does not address over-rev. If the
customer wants to have the over-rev protection capability, the tach wire must be connected.
Important: After successfully learning Virtual Tach, a small minority of vehicle starters may over
or under crank during remote start. The Bitwriter can be used fine tune the starter output time in 50
millisecond increments to compensate for such an occurrence.
Learning Hardwired or Data Tach (not needed with Virtual
Tach)
To learn the tach signal:
1. Start the vehicle with the key. Within 5 seconds, press and hold the Control Center button.
2. After 3 seconds the status LED on the Control Center lights solid when the tach signal is learned.
3. Release the Control Center button.
Note: When the tachometer is programmed, the main unit automatically enters the Tachometer Engine
Checking Mode.
Important: After successfully learning Tach, a small minority of vehicle starters may over crank or under
crank during remote start. If such an occurrence is encountered you can fine tune the starter output time
by programming manually (see Starter Release Fine Tune in Features Programming). Note this feature is
programmable only with a Bitwriter.
Remote Start Shutdown/Startup Diagnostics
Shutdown diagnostics: If the remote start activates but fails to stay running, the remote start module has
the ability to inform you of what may have caused the remote start failure. Before performing shutdown
diagnostics it is important that you let the remote start shut OFF on its own i.e., let it attempt to start 3 times
then shut down, if this is not done the unit will report the shutdown last used to shut OFF the remote start.
Note: Shutdown diagnostics does not report if the vehicles factory immobilizer is causing the problem.
To Perform Shutdown Diagnostics:
1. With the ignition OFF, press and hold the Control Center button.
2. Turn the ignition ON and then back OFF while holding the Control Center button.
3. Release the Control Center button.
4. Press and release the Control Center button one time.
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