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Technical Description: Tachometer: Notes

The main instrument unit is fitted with and electronic tachometer. Trionic sends continuous information on the engine speed to the bus.

The tachometer is supplied with current and controlled from the main instrument unit control module. When engine speed is below 1100 RPM (around idling speed) the display is "damped" to give a more stable reading.

Fig 1: Identifying Tachometer
G03518404Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fig 2: Circuit Diagram TRIONIC
G03518405Courtesy of SAAB-SCANIA OF AMERICA, INC.