Carry out check of operability of the sensor in the following order:

Fig. 4.4. Cooling system elements: 1 – bolt; 2 – top cover; 3 – air inlet; 4 – fixing bracket; 5 – radiator; 6 – rubber ring; 7 – sealing ring; 8 – thermoswitch; 9 – stopper; 10 – hose; 11 – broad tank; 12 – casing; 13 – arm of fans; 14 – nut; 15 – additional fan; 16 – main fan; 17 – lower hose; 18 – driving belt; 19 – top hose

– disconnect the electric plug from the sensor 8 (see fig. 4.4 );

– using a piece of a wire of the corresponding length, connect two contacts in the removed plug;

– if the fan of a radiator turned on, so the sensor of turning on of the fan is faulty, and it needs to be replaced;

– if the fan of a radiator does not work at short circuit of contacts of the sensor, then it is necessary to check serviceability of the engine of the fan of a radiator or the bringing wires;

– for check of the sensor lower it in the container with water so that in water there was only a working part of the sensor with a carving, and electric contacts were over water. Connect contacts of an ohmmeter to contacts of the sensor. Heat water and note temperature at which the sensor turned on (the ohmmeter has to show short circuit). Cool water and note temperature at which the sensor will be switched off. If temperatures of inclusion and switching off of the sensor differ from demanded, replace the sensor.

Carry out removal and installation of the sensor in the following order:

– disconnect a wire from the negative plug of the rechargeable battery;

– merge liquid from the cooling system;

– disconnect the electric socket

– turn out the sensor 8 (see fig. 4.4 ) from a radiator 5 and remove laying 7.

You make installation of the removed elements in the sequence, the return to removal.