Cooling system for an internal combustion engine and another object

The present invention relates to a cooling system including an internal combustion engine (2) and at least another object (14) in a vehicle (1) is cooled. The cooling system comprises a radiator (11, 11 ') and a main circuit (4) having a first coolant pump (7), a first valve device (8), the coolant from the engine (2) receives and (to a cooler inlet line 5a, 5a ') and / or a cooler bypass line (4c) passes, and a second valve device (9), the coolant (from a radiator outlet line 5a, 5a') and / or a cooler bypass line (4c) and having it to a cooler outlet line leads (5a, 5a ') and / or an engine inlet pipe (4a). The cooling system comprises a secondary circuit (6) for cooling the further object (3). The secondary circuit (6) comprises a second coolant pump (12), a first return line (6b) and a second return line (6c), the refrigerant from the secondary circuit (6) to the engine inlet pipe (4a) or to the cooler inlet line (5a, 5a ' ) conduct.