8.12.6. Check of sensors of control devices

Sensor of the index of level of fuel
BM-150 sensor type. It is established in the fuel tank and fastens to it screws.
The sensor has the variable resistor from a nikhromovy wire. The mobile contact of the resistor is run by the lever with a float. On the short end of this lever there is also mobile contact including a control lamp of a reserve of fuel if in a tank there were 4–6,5 l of gasoline.
At an empty tank resistance of the sensor has to be 315–345 Ohms, with the tank filled half — 108–128 Ohms, and at a full tank — it is less or equally in 7 Ohms.
Sensor of the index of temperature of cooling liquid
TM-106 sensor type. It is wrapped in a head of cylinders on the left side of the engine.
The thermoresistor changing the electric resistance depending on temperature of cooling liquid is installed in the sensor.
Data for check of the sensor are provided in table 8-7.


Sensor of the index of pressure of oil
MM393A sensor type. It will transform pressure in the engine lubrication system to resistance of an electric chain. The sensor is installed on the block of cylinders of the engine on the left side. Data for check of the sensor are provided in tab. 8-8.


Sensor of a control lamp of pressure of oil
The MM-120 sensor is installed on the block of cylinders of the engine on the left side.
Contacts of the sensor have to become isolated and be disconnected with a pressure of 20-60 kPa (0,2–0,6 kgfs/cm2).
To the relay breaker of a control lamp of the parking brake of the RS-492 Relay breaker it is intended for receiving faltering burning of a control lamp of the parking brake. It is suspended on wires behind a guard of devices.
The quantity of cycles a minute of inclusion and switching off of the relay breaker at a voltage from 10,8 to 15 V and temperature from-40 to +40 °C has to be within 60–120. Resistance of a winding of the breaker of 26 Ohms.
Since 1994 the RS-492 relay breaker on cars is not used. Therefore when braking the car the parking brake the control lamp of the parking brake burns with constant light.