Operation With Ignition OFF: Notes
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.
There is a risk of the coolant overheating even when the ignition is OFF. To prevent this, DICE can activate the radiator fan on the basis of information from the engine coolant temperature sensor. Coolant temperature information signals occur 30 and 60 seconds after the ignition has been turned OFF.
Using this information together with radiator fan status at ignition OFF, DICE can activate the fan (low speed if it is a 2-speed fan). The radiator fan can be activated up to 20 minutes after ignition OFF and can run for up to 3.5 minutes.