With A/C

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Coolant temperature (bus from Trionic T7)
A/C pressure (own pressure gauge)
Car speed (bus MIU)
Outside temperature (bus from SID)
A/C system status (active/inactive)

For more information on the A/C and its control system, refer to AUTOMATIC A/C-HEATER SYSTEMS - 9-3 .

When the A/C clutch operates, the radiator fan is activated as follows:

Coolant temperature
Low speed is activated when coolant temperature reaches 100°C.

Low speed is turned off when the temperature drops to 96°C.

High speed is activated when coolant temperature reaches 113°C.

High speed is turned off when the temperature drops to 109°C.
Outside temperature
Low speed is activated when the outside temperature exceeds 22 °C and is turned off when the temperature drops below 20°C.
Car speed / A/C pressure
Low speed is activated when car speed is below 38 km/h at the same time as A/C pressure is between 9 and 18 bar. Low speed is turned off when car speed exceeds 40 km/h or A/C pressure drops below 7 bar.
A/C pressure
High speed is activated when A/C pressure exceeds 18 bar and turned off when A/C pressure drops below 14 bar.