Contents: Fuel level indicator sensor ↓ Coolant Temperature Gauge Sensor ↓ Oil pressure indicator sensor ↓ Oil Pressure Warning Light Sensor ↓ Parking brake indicator lamp…↓
Fuel level indicator sensor
Sensor type BM-168. It is installed in the fuel tank and is attached 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, when the tank is half full - 108-128 Ohms, and when the tank is full - less than or equal to 7 Ohms.
Coolant Temperature Gauge Sensor
Sensor type TM-106 It is screwed 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 are given in Table 7-8.
Table 7-8. Coolant Temperature Gauge Sensor Test Data
| Temperature, | Voltage supplied to the sensor, V | Sensor resistance, Ohm |
| 30 | 8.0C | 1350-1880 |
| 50 | 7.60 | 585-870 |
| 70 | 6.85 | 780-390 |
| 90 | 5.80 | 155-196 |
| 110 | 4 70 | 87-109 |
Oil pressure indicator sensor
Sensor type MM393A It converts the pressure in the engine lubrication system into the resistance of the electrical circuit. The sensor is installed on the engine cylinder block on the left side. The data for checking the sensor are given in Table 7-9.
Table 7-9.
| Pressure, MPa (kgf/cm²) | Sensor resistance, Ohm |
| 0 (0) | 290-320 |
| 0.4 (4) | 103-133 |
| 0.6 (6) | 55-80 |
| 0.8 (8) | 0-15 |
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 (0.2-0.6 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°C to +40°C should be within the range of 60-120. The resistance of the breaker winding is 26 Ohm.