FixVault

Coolant temperature: Notes

The coolant temperature gauge gives the driver information on engine coolant temperature.

The coolant temperature gauge is supplied with current from the main instrument unit. The coolant temperature gauge is controlled by the main instrument unit.

The engine control module continuously sends information on the coolant temperature to the bus.

The temperature display is controlled in the main instrument unit, and from information from the engine control module, the main instrument unit sets break points at certain temperatures to give a stable display at normal coolant temperature.

The following breakpoints are programmed in the main instrument unit (factory setting):

Fig 1: Coolant Temperature Gauge Communication Diagram
G03871018Courtesy of SAAB-SCANIA OF AMERICA, INC.
COOLANT TEMPERATURE

  Coolant temperature
Gauge needle: 4 cylinder petrol V6 diesel
-from "blue" zone 50°C 50°C
-into "horizontal" position 83°C 78°C
-from "horizontal" position 115°C 111 °C
-into "red" zone 129°C 123°C