Crankshaft speed sensor
The crankshaft speed sensor is installed on the cylinder block above its pulley and is designed to determine the engine crankshaft speed for the injection subsystem, to generate a control signal for opening the injectors. It is based on the use of the Hall effect and generates an impulse of one full revolution of the crankshaft, which is a reference signal for calculating the engine speed and its instantaneous angular position.
Coolant temperature sensor
The coolant temperature sensor is an NTC resistor, i.e. its resistance decreases as the temperature rises.
While the engine is warming up, the ECM-ECU ensures the enrichment of the fuel mixture based on an electrical signal from a temperature sensor installed in the cylinder head. If the engine does not start, starts with difficulty or stalls after starting, as well as with increased fuel consumption and CO content in the exhaust gas, it is necessary to check the serviceability of the coolant temperature sensor.
Exhaust oxygen sensor
The oxygen concentration sensors in the exhaust gas are installed in combination with a triple-acting catalytic converter. There are four of them in total, two for each row, they provide feedback between the process of complete combustion of the fuel and the ECU-KSUD, according to the indication of residual oxygen in the exhaust gas. From the oxygen concentration sensor in the exhaust gas (oxygen sensor) control signals are generated to maintain the optimum composition of the fuel-air mixture, close to stoichiometric.