Circulation Pump: Notes
WARNING: This page is about a different car, the 2006 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.
Cars with parking heater are equipped with a circulation pump for the parking heater. The aim is to achieve and even flow through the heat exchanger when the parking heater is active.
The circulation pump is supplied from +30 via fuse 8 and is controlled on the ground side from the control module's K1 pin 15.
The control module starts the pump when the engine is on or when the parking heater is active.