The crankshaft rotation sensor provides synchronization of the engine of the internal combustion engine and the ignition system. This is due to the transfer of data on the position of the crankshaft, directly into the engine control unit. Which in turn determines the operation of the ignition system. Violations in its work lead to a complete stop of the power unit of the car.

Where is the crankshaft sensor how it works

The location of the crankshaft rotation sensor may vary depending on the type of engine. It is usually located close to the pulley of the generator drive.

The crankshaft sensor is externally, almost identical to the camshaft sensor, with the difference only. It has a long wire with a connector for connecting to the engine control unit. The crankshaft sensor wire can reach the length of 60-70 cm.

The principle of operation of the crankshaft rotation sensor may vary depending on its type. Total are used three types of crankshaft sensors.

Interesting! The crankshaft rotation sensor in different literature is called differently. So, for example, the abbreviation of DPKV is found. Which is decrypted as a "crankshaft position sensor".

crankshaft induction sensor

The induction sensor of the crankshaft revolutions is an autonomous device that does not require the power supply. The signal fed to the control unit is formed by electromagnetic induction at the time of the synchronization tooth through the magnetic field. In addition to the data on the position of the crankshaft, the induction sensor also transmits the velocity of the vehicle.

optical type crankshaft sensor

The optical crankshaft rotation sensor runs through light threads. The principle of operation of such a sensor is next. The synchronization disk is made with holes, it interrupts the light stream between the light source (LED) and the photocell. When you turn the synchronization disc, the light stream passes through the hole and enters the photocell, at this point the optical sensor produces an electrical pulse and gives it to the electronic motor control unit.

hall type crankshaft sensor

The operation of this sensor is based on the Hall effect. The pulse is supplied from this sensor at the moment the effect on the electromagnetic field. It affects it in a specific position of the synchronization disk. This type sensor also acts as a ignition distributor sensor.

Crankshaft sensor faults, fault signs

About the malfunction in the work sensor position of the crankshaft say:

• Taped on the car dashboard indicator "Check Engine";
• A significant reduction in the dynamics in the engine operation during movement;
• Unstable speed at idle;
• Spontaneous decrease and increase in engine speed;
• Detonation arising in the engine during movement;
• The engine does not start.

Checking the crankshaft speed sensor

Checking the crankshaft speed sensor is performed in three different ways. Two of which can be used independently in the presence of certain devices. The third is only available in specialized auto repair shops.

Important! Before starting checking the crankshaft rotation sensor, it is extremely recommended to explore the instruction attached to the car.

Consider more details of checking the crankshaft rotation sensor:

checking the crankshaft sensor, check synchronizer and electrical system

Check is carried out using a special device of an ohmmeter or multimeter.

Sequence of actions when checking the crankshaft rotation sensor:

1. Set the sensor position labels;
2. Dismantle directly the sensor itself;
3. Make a visual inspection for mechanical damage;
4. When detected contaminated contacts, clean them with alcohol;
5. Establish the distance from the crankshaft sensor core to synchronization disk. The distance must be 1.0 mm + -0.4 mm;
6. Turn on the mulitimeter the function "Resistance Measurement";
7. With the help of the multimeter probe, measure resistance at the output;
8. The resistance of the working sensor of the crankshaft should be 550-750 ohms.

Important! This check does not guarantee 100% of the likelihood that its results are correct.

instruments for checking how to make a deep sensor check with your own hands using measuring instruments

This method of checking the crankshaft rotor sensor is more complex and efficient.

To verify the sensor in these methods, you will need:

• Megommeter;

• Magnetic induction meter.

Prepare instruments need, you can proceed directly to verification:

1. Set the sensor position labels;
2. Dismantle directly the sensor itself;
3. Make a visual inspection for mechanical damage;
4. When detected contaminated contacts, clean them with alcohol;
5. Establish the distance from the crankshaft sensor core to synchronization disk. The distance must be 1.0 mm + -0.4 mm;
6. Turn on the megommeter in the position of 500 volts;
7. Turn on the magnetic induction meter;
8. We measure the insulation resistance to the megommeter and electromagnetic induction;
9. The resistance of the sensor should be more than 20 MΩ, and the induction induction is 200-400 MHz.

The above data will talk about the health of the crankshaft sensor.

checking the crankshaft sensor to a hundred

The most accurate and qualitative way to check the crankshaft rotation sensor. Is his check in a specialized maintenance station (service station). At the service station, the sensor is carried out using an oscilloscope.

Interesting! Oscilloscope - a device for measuring electrical pulses (signals) at a certain period of time.

Checking the oscilloscope is carried out without removing the crankshaft rotation sensor and allows you to effectively determine the presence of problems in the ignition system.

Tips of professionals

• The most efficient way to check the crankshaft rotation sensor is to check it with an oscilloscope in a specialized auto repair shop.
• It is recommended to carry a spare crankshaft sensor with you, in trunk. Its price is not large, and the value for normal operation of the engine is difficult to overestimate.
• When removing the crankshaft sensor, the labels of its initial position should be set. To bring the sensor correctly when installing.
• The distance from the sensor core to the synchronization disk should be 1.0 mm + -0.4 mm.
• When dismantling the sensor, the ignition should be turned off.
• In no case should not check the operation of the crankshaft sensor with a lamp. This is a sure way to bring the sensor into a non-working condition.