Engine coolant overheating as indicated by the gauge, loss of power, loud detonation, or humming noise indicate that the engine is likely to be overheated. In this case, you must do the following.
1. Carefully pull off the road, stop the vehicle and turn on the hazard warning lights. Set the gearbox to position «R» (Automatic transmission) or in neutral (Manual Transmission) and apply the parking brake. If the air conditioning is on, turn it off.
2. If coolant or steam evaporates from the radiator or tank, stop the engine. Open the hood only after evaporation has stopped. If the coolant does not boil or evaporate, do not stop the engine and check that the electric cooling fan is running. If the fan does not work, turn off the ignition.
3. Look for visible coolant leaks from the radiator, hoses, and under the vehicle. Note that water leakage from the air conditioning system after operation is not a malfunction.
4. If a coolant leak is detected, stop the engine immediately.
5. If there are no visible leaks, check the coolant tank. If the tank is empty, fill it with coolant while the engine is running. Fill it up to about half.
6. After lowering the engine coolant temperature to normal, check the coolant level in the tank again. If necessary, add it up to half. A significant drop in the coolant level indicates a leak in the system.