Coolant Temperature: Notes

WARNING: This page is about a different car, the 2002 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The engine coolant temperature sensor (202) informs the driver of the engine's coolant temperature.

The engine coolant temperature sensor is supplied with current and controlled by the Trionic T7 engine control module. The control module continuously transmits coolant temperature information on the bus. DICE receives coolant temperature information from the MIU via the I-bus.

The coolant temperature gauge scale is divided into 5 fixed points. The main instrument unit is programmed to guide the gauge needle to the fixed points at the specified temperatures in order to give stable indication at normal coolant temperatures.

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

Fig 1: Identifying Coolant Temperature Program Flow

Courtesy of SAAB-SCANIA OF AMERICA, INC.

COOLANT TEMPERATURE GAUGE NEEDLE POSITIONS SPECIFICATIONS

Gauge needle:	Coolant temperature
In the "blue" range	30°C (fixed value)
Out of "blue" range	50°C
In "horizontal" position	80°C
Out of "horizontal" position	115°C
In "red" range	129°C
Out of "red" range	133°C (fixed value)