Contents: Fuel level indicator sensor ↓ Coolant Temperature Gauge Sensor ↓ Oil Pressure Warning Light Sensor ↓ Parking brake indicator lamp…↓
Data for checking the coolant temperature gauge sensor
Temperature, °C | Voltage supplied to the sensor, V | Sensor resistance, Ohm |
30 | 8 | 1350 – 1880 |
50 | 7,6 | 585 – 820 |
70 | 6,85 | 280 – 390 |
90 | 5,8 | 155 – 196 |
110 | 4,7 | 87 – 109 |
Fuel level indicator sensor
Sensor type BM-150.
It is installed in the fuel tank and secured to it with screws.
The sensor has a variable resistor made of nichrome wire. The resistor's movable contact is controlled by a lever with a float. At the short end of this lever there is also a movable contact that turns on the fuel reserve indicator lamp if there are 4–6.5 liters of gasoline left in the tank.
When the tank is empty, the sensor resistance should be 315–345 Ohms, with the tank half full – 108–128 Ohms, and with the tank full – less than or equal to 7 Ohms.
Coolant Temperature Gauge Sensor
Sensor type TM-106.
Screws into the cylinder head on the left side of the engine.
The sensor contains a thermistor that changes its electrical resistance depending on the coolant temperature. The data for checking the sensor is given in Table. Data for checking the coolant temperature gauge sensor.
Oil Pressure Warning Light Sensor
The MM-120 type sensor is installed on the engine cylinder block on the left side.
The sensor contacts should close and open at a pressure of 20–60 kPa (0.2–06 kgf/cm²).
Parking brake indicator lamp relay-interrupter
The RS-492 relay-interrupter is designed to obtain intermittent burning of the parking brake indicator lamp. It is suspended on wires behind the instrument panel.
The number of cycles per minute of switching on and off the relay-breaker at a voltage of 10.8 to 15 V and a temperature of -40 to +400°C should be within 60–120.
The resistance of the breaker winding is 26 Ohm.
Since 1995, the RS-492 relay-interrupter has not been used in cars. Therefore, when braking the car with the parking brake, the parking brake indicator lamp lights up continuously.