16.15.1. Check of control devices and sensors

The index of temperature of cooling liquid (UK-193 type) works together with the sensor of temperature TM-106 screwed in a head of cylinders. The thermoresistor (the resistor changing the resistance depending on temperature) is installed in the sensor.

The arrow of the device constantly is in a red zone

At the included ignition we disconnect a wire from the sensor. If the arrow returns to the beginning of a scale – the sensor is faulty. Otherwise or the device is faulty, or the wire is closed on "weight". For check we remove a combination of devices (see Removal of a combination of devices), we disconnect from the index a green wire with a white strip and we include ignition. If the arrow returned to the beginning of a scale – the index of temperature of cooling liquid is serviceable, and the wire is damaged.

The arrow of the device constantly is in the beginning of a scale

At the included ignition we disconnect a wire from the sensor and we connect it to "weight". If the arrow deviates – the sensor is faulty. If the arrow did not deviate, we remove a guard of devices (see Removal of a combination of devices) and we connect a conclusion of the index of temperature to which the green wire is connected to "weight". If the arrow deviated – the device is serviceable, and the wire between the sensor and the index of temperature is damaged

It is possible to check the sensor an ohmmeter. The serviceable sensor at a temperature of liquid less than 40 °C (an arrow of the index at the beginning of a scale) has to have resistance of 640-1320 Ohms, at 90–100 °C (the beginning of a red zone on the device) – 77–89 Ohms, and at the end of a red zone of a scale – 40–50 Ohms.

The sensor non-demountable – to repair is not subject.