Range Rover (LP) V8-4.0L (1999)
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Tachometer: Description and Operation
With GEMS (Generic Engine Management System)
Tachometer, Circuit Operation
The tachometer will display the engine speed in R.P.M. It will derive the engine speed from the engine speed pulse train transmitted from the Engine
Control Module (ECM) (Z132).
The pulse rate for petrol engines will be 4 pulses per engine revolution.
The pulse rate for diesel engines will be 3 pulses per engine revolution.
