Impreza RS Coupe AWD F4-2.5L SOHC (1999)
Temperature Gauge: Description and Operation
WATER TEMPERATURE GAUGE
The water temperature gauge is a cross-coil type.
The water temperature signal is input from thermo gauge installed on the engine.
The resistance of thermo gauge changes according to engine coolant temperature. Therefore, the current input to water temperature gauge also changes
according to engine coolant temperature. Accordingly, gauge hand moves in proportion to the change in magnetic force of coil.
When the water temperature is at approx. 70 to 100 °C (158 to 212 °F) [normal operating temperature], the meter hand is stable in the middle of
indication range as shown in the graph shown.
