How to check the crankshaft sensor

Violations The crankshaft sensor is one of the reasons for reducing the engine power. To exclude it or on the controversial, confirm and makes such a procedure as checking the crankshaft sensor. It is possible to spend it on your own, following our step-by-step instructions.

To beginfully, we find on the engine of your car this sensor, be sure to mark the labels of its location (it will make it easier for its reverse installation) and carefully remove it. Now we are conducting an external inspection of the integrity of the device and the state of its components - hulls, contacts, core, contact pad. If the visual stage of diagnostics did not reveal any damage on the sensor, clean it (especially carefully - contacts) and go to the next step.

In order to more accurately check the performance of the crankshaft sensor, the instruments (ohmmeter, the megaommeter, the voltmeter (ideally - digital) and the power transformer) and the optimal temperature parameters of the air (20-22 degrees Celsius) are required. First, we measure the resistance of the synchronization sensor winding with an ohmmeter and compare the results with the factory data specified in the instructions for your car. Typically, the standard falls within 550-750 ohms.

Now we go to the measurements of the inductance of the winding using a corresponding meter (inductive coil, resistance and containers). This indicator of a working crankshaft sensor should be 200-400 MHz.

Another parameter to be checked at the instrument is insulation resistance. In this case, we use the megaometer and we look at the voltage of 500 to the indicator did not exceed 20 MΩ.

If the sensor synchronization disk is accidentally magnetized during the diagnostics, it is possible to return it to the initial state using a network transformer.

The results of the measurements will serve you by manuals for further actions: if the indicators did not fit into the norm - the sensor is subject to replacement, if fit - the reason for the poor engine operation should be sought elsewhere. In the latter case, a serviceable crankshaft sensor can be installed in place, not forgetting the interval of 0.5-1.5 mm between the core of the device and its disk synchronization.