BOA 165B Installation Manual page 28

On some vehicles the electrical system has too low of a voltage
variance for the remote start module to see. In this case the
engine will not be protected from over cranking, over revolution,
or under revolution of the engine. If this is the case, it will be
necessary to use the tachometer.
Engine monitoring (tachometer—optional)
© 2005 Directed Electronics, Inc.
warning! In the following procedure do
not wear loose clothing that could get
entangled in rotating engine components.
Ensure that your hands and arms are well
clear of these rotating components when
working in the engine compartment.
Lastly, ensure that all wires and tools are
clear of falling into or entanglement with
these rotating components.
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