UAZ designs injector sensors. Sensors of the engine control system UAZ Patriot. Typical parameters of injector motor VAZ

A comprehensive control system is designed to control the fuel injection and an angle of the engine ignition.

Functionally control system consists of two subsystems:

Fuel injection management subsystems;

Ignition advance control angle control subsystems.

Both subsystems are interconnected and operate synchronously with the main engine operation cycle. Synchronization of the subsystems is carried out by signals of sensors installed on the engine.

The system consists of a microprocessor control unit (BU), which controls the executive devices according to the program laid in the block, taking into account information from the sensors.

The sensors include:

Air Flow Sensor 0 280 212 014 f. "Bosch" (Germany) or HFM5-4.7 0 280 218 02 037 f. Bosch or HFM62C / 11 f. Siemens (Germany) or 20.3855 to determine the mass filling of cylinders by air.

Installed on the car between the air filter and the receiver.

Throttle position sensor 0 280 122 001 F. Bosch (Germany) or 406.1130000-01 resistive type set on choke.

The signal from the sensor is used to determine the mode of operation of the engine (idle, partial load or full power).

Sync sensor (crankshaft position) 23.3847 or DS-1 inductive type mounted on a circuit lid near the crankshaft pulley.

The sensor forms a special electrical signal when the magnetic field interacts with the sensor with a special gear disk (tooth disk 60-2) installed on the crankshaft pulley.

The electrical signal from the sensor informs the control unit on the corner position of the crankshaft during its rotation.

The sensor and disk 60-2 of the tooth (synchronization disk) are set in such a way that the moment of passing through the continuation of the axis of the rear cut sensor of the twentieth tooth of the disk corresponds to finding in the upper dead point of the piston of the first or fourth cylinder. At the same time, the countdown of the tooth number is made from the pass in the direction opposite to the rotation of the disk.

Phase sensor (camshaft positions) DF-1, or 406.3847050-04, or 406.3847050-05 installed on the head of the cylinder block.

The sensor generates a signal at the time of passing in the magnetic field of the indicator sensor, made in the form of a bent plate installed on the graduation camshaft.

The appearance of the signal from the sensor indicates the beginning of the compression tact in the first cylinder.

At the time of the signal appears from this sensor, the rear section of the first tooth of the disk 60-2 of the tooth (counting from the pass in the direction opposite to the rotation of the disk) should pass through the continuation of the axis of the crankshaft position sensor.

Sensors and actuators Engine control systems ZMZ-40906 placed on the engine: throttle module, fuel ramp, electromagnetic nozzles, spark plugs, synchronization sensor, coolant temperature sensor, absolute pressure sensor and temperature sensor, detonation sensor.

Throttle module with throttle valve and angular position sensor Bosch DV-E-5 0 280 750 151 (40904.1148090).

The throttle module is placed on the engine receiver. Designed to regulate the position of the throttle with electronic method from the control unit. Refers to not repaired products.

Fuel ramp (distribution fuel line) Bosch 0 280 151 256 (40905.1100010) with electromagnetic nozzles assembly.

Fuel ramp - steel, rectangular section, unwanted deadlock, with a quick-consuming connection, is fixed on the inlet tube with two bolts. Refers to non-processed products.

The nozzles are held in the ramp with the help of special compounds "Clips", which do not allow the nozzles to rotate. At the front end, the ramp is located a closed cap with a sealing rubber ring of a threaded fitting, inside of which nipple is located. The fitting is used to connect the power supply system to diagnose the power system. The fuel line is connected to the fuel supply fittings using a special quick-consumption connection.

Planting nozzles in the inlet tube is compacted using rubber rings of round-section. When installing ramps with nozzles, sealing rubber rings to facilitate the installation, it is necessary to lubricate with clean engine oil.

Electromagnetic nozzles Bosch EV14EL 0 280 158 237 (409044.1132010) SMZ-40906 engine control system on UAZ.

Bosch EV14El 0 280 158 237 nozzles with two-flow spraying of fuel in the amount of four pieces as part of the fuel ramp. Electromagnetic are designed for serial or pair-parallel fuel injection into the inlet channels of the cylinder head. The active resistance of the nozzle winding with plus 20 degrees is 12 + -0.6 Ohm. Injectors belong to non-repaired products.

Bosch type ignition coils 0 221 504 027 (40904.3705000), BERU 075 4075 0000 00 (40904.3705000-01) and 407.3705000 CJSC "SOATE".

The ignition coils are individual, transformer type, are placed on the lid of the valves in the number of four pieces. Designed to form high voltage energy for spark plugs. Refer to not repaired products.

The spark plugs of small-sized execution, with a dishevement resistor, four pieces, screwed into the head of the cylinder block in the center of the combustion chambers. Clearance between electrodes 0.70-0.85 mm.

Synchronization sensor (engine crankshaft position) Bosch 0 261 210 302 (40904.3847010), Bosch 0 261 210 331 (40904.3847010-03), 40904.3847010-01 OJSC Pegasus.

Induction type synchronization sensor, placed on the circuit lid near the crankshaft pulley. The sensor generates an electrical signal when the magnetic field interacts with the sensor with a special gear disk (60-2 tooth) installed on the crankshaft pulley.

The mutual orientation of the synchronization and sensor disk is such that the moment of passing the axis of the binding sensor of the twentieth tooth of the synchronization disk corresponds to finding the piston of the first and fourth cylinders in the upper dead point. Counting the tooth number - from the pass in the direction opposite to the rotation of the crankshaft of the engine.

The sensor is designed to determine the control of the angular position and the rotation frequency of the crankshaft of the engine. The range of functioning of the sensor: the speed of rotation of the disk 20-7000 revolutions per minute, the air clearance between the core of the sensor and the tooth surface of the disc is 0.3-1.5 mm. Refers to not repaired products.

Cooling fluid temperature sensor Bosch 0 280 130 093 (40904.3828000) JMZ-40906 engine control system on UAZ.

The coolant temperature sensor is thermostable, NTC-type, is placed in the thermostat housing. Refers to non-processed products. The sensor is designed to determine the temperature of the cooling, which is used by the control unit for.

- Correction of the control of fuel feed and angle of ahead of the ignition (WNO), depending on the temperature of the coolant.
- controlling the operation of the heater of oxygen sensors in order to exclude the possibility of their damage due to condensate falling and ensuring the rapid warm-up of oxygen sensors on the cold engine.
- control of the technical condition of the cooling system (excess of the maximum permissible temperature), including to form a control signal to the coolant temperature pointer in a combination of car devices.

The absolute pressure and temperature sensor Bosch 0 261 230 217 (40905.3829010) of the SMZ-40906 engine control system on the UAZ.

The absolute pressure and temperature sensor - semiconductor type, with a piezoresistor and thermistor, is located in the receiver. The sensor is designed to measure the absolute pressure control unit and the temperature of the absorbable air. The signal coming from the sensor is used by the control unit when.

- Calculation of air flow.
- control of fuel feeds of electromagnetic nozzles, forming the angle of fibergiation and determining the engine load.
- Temperature correction of the control of fuel feeds and an angle of a ignition advance depending on the air temperature in the intake system at all modes of engine operation.

Pressure sensor output signal - analog. The measured pressure range from 10 kPa to 115 kPa. The supply voltage is stabilized, 5V. The working range of the measured temperature of the NTC-type temperature sensor - from minus 40 to plus 130 degrees. Refers to non-processed products.

Sensor of detonation Bosch KS-4-S 0 261 231 176 (40904.3855000) or similar.

The detonation sensor is a piezoelectric, placed on the cylinder block from the intake system, in the zone of the 4th cylinder. Designed to identify the detonation combustion control unit in the engine.

Sensors and actuators of the engine control system ZMZ-40906, placed on the car.

Oxygen sensors (lambda probes) of the engine control system ZMZ-40906 on UAZ.

Zirconium, with electrically heated controlled in the amount of 2 pieces. The main lambda probe is located before the receiving pipe of the exhaust system of the car. Designed to determine the mixture control unit of the mixture to the neutralizer (on the engine release).

An additional lambda probe is placed in the neutralizer housing at its output. Designed to determine the composition of the mixture composition of the mixture after the neutralizer. The heating chains of oxygen sensors are controlled directly from the control unit.

Gas pedal module.

Placed in the car. Designed to set the engine load driver. The potentiometric, two-channel pedal position sensor intended to determine the position of the accelerator pedal control unit is built into the pedal mechanism.

Gasoline vapor adsorber with an electromagnetic purge valve.

Placed in the cutting space of the car. Designed to capture fuel vapor from the gas tank and their accumulation in the adsorb. The command from the control unit valve commutes the highway connecting the adsorber and the engine inlet tube (the approach - through the revenue in the choke receiver). The valve is designed to purge (regeneration) of the adsorber.

Module of submersible fuel pump.

With electric drive, fuel pressure regulator (38010 kPa), coarse filter and fuel level sensor. The module is placed in the gas tank car. Designed to maintain constant fuel pressure in the highway.

Control unit ZMZ-40906 motor control system.

Microprocessor. Placed in the cutting space of the car. The execution of the control unit may vary, depending on the configuration of the UAZ car. Wiring wiring engine control systems ZMZ-40906 is located on the body and frame of the car.

The optimal operation of the automotive engine depends on many parameters and devices. To ensure normal performance, the VAZ motors are equipped with various sensors designed to perform different functions. What you need to know about the diagnosis and replacement of controllers and what the parameters of the VAZ Table is presented in this article.

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Typical parameters of injector motor VAZ

Checking the VAZ sensors, as a rule, is carried out when identifying certain problems in the operation of controllers. To diagnose, it is advisable to know what kind of malfunctions of the VAZ sensors can occur, this will allow you to quickly and correctly check the device and timely replace it. So, how to check the main VAZ sensors and how to replace them after that - read below.

Features, diagnosis and replacement of elements of injection systems on VAZ cars

Below will look at the main controllers!

Hall.

There are several options as you can check the Hall Sensor VAZ:

Use knowingly working device to diagnose and install it instead of regular. If, after replacing the problem, the engine has stopped, this indicates a fault of the regulator.
Using the tester to diagnose the controller voltage at its outputs. With the normal performance of the device, the voltage must be from 0.4 to 11 volts.

The replacement procedure is performed as follows (the process is described on the example of the model 2107):

First, the distribution device is disassembled, its lid is twisted.
Then disassembling the runner, for this it must be pulled out a bit up.
Remove the lid and unscrew the bolt that fixes the plug.
It will also be necessary to unscrew the bolts that fix the plate of the controller. After that, screws are unscrewed that attach a vacuum corrector.
Next, disassembly of the locking ring is carried out, thrust is removed along with the corrector itself.
To disconnect the wires, it will be necessary to push the clamps.
The support plate is pulled out, after which several bolts and the manufacturer disassemble the controller are unscrewed. Installation of a new controller is made, the assembly is carried out in the reverse order (author of the video - Andrey Mudnov).

Speed

The failure of this regulator may report such symptoms:

at idle turns of the power unit float, if the driver does not rush gas, it can lead to an arbitrary motor disconnection;
speedometer arrows readings float, the device may not work as a whole;
increased fuel consumption;
the power of the power unit decreased.

The controller itself is located on a gearbox. To replace it, you will need only to raise the wheel on the jack, disconnect the power wires and dismantle the regulator.

Fuel level

The Fuel Sensor of the VAZ or Douth fuel is used to designate the remaining volume of gasoline in the fuel tank. Moreover, the fuel level sensor itself is installed in the same gas station. With its malfunction, the readings on the dashboard may be inaccurate.

The replacement is done like this (on the example of the model 2110):

The battery is turned off, the back seat of the car is removed. Using a cross-shaped screwdriver, bolts are twisted, which fix the gas station hatch, the cover is removed.
After that, all the conductive wires are disconnected from the connector. It is also necessary to disconnect all the nozzles that are bodied to the fuel pump.
Then unscrew the nuts fixing the clamping ring. If the nuts rusted, before unscrewing, treat them with WD-40 liquid.
Having done this, unscrew the bolts that fix the fuel level sensor itself directly. The guides are pulled out of the pump casing, and the attachments do not have to bendled with a screwdriver.
At the final stage, disassembled the lid, after that you can get access to the Dut. The controller changes, the assembly of the pump and the remaining elements is carried out in reverse order.

Photo gallery "Change with your own hands"

Idle move

If the idle sensor on the VAZ fails, this is fraught with such problems:

floating turnover, in particular, when inclusive of additional voltage consumers - optics, heater, audio systems, etc.;
the engine will start tall;
when the central transfer is activated, the motor can stumble;
in some cases, the failure of the RXX can lead to body vibrations;
the appearance of the Check indicator on the dashboard, but it does not light up in all cases.

To solve the problem of the non-working capacity of the device, the idling sensor of the VAZ can either be cleaned or replaced. The device itself is located opposite the cable, which goes to the gas pedal, in particular, on the throttle.

The idling sensor of the VAZ is fixed with several bolts:

To replace first, turn off the ignition, as well as the battery.
Then it is necessary to remove the connector, for this, the wires connected to it are turned off.
Next, the bolts are twisted with a screwdriver and RXX is removed. If the controller is glued, you will need to dismantle the throttle node and disable the device, while acting carefully (the author of the video is OVSIUK channel).

Crankshaft

To fulfill the first method, it will take an ohmmeter, in this case, the resistance on the winding should vary in the region of 550-750 ohms. If the indicators obtained during the test differ slightly, it is not scary, it is necessary to change the DPKV if the deviations are significant.
To fulfill the second diagnostic method, you will need a voltmeter, a transformer device, as well as a inductance meter. The resistance measurement procedure in this case should be carried out at room temperature. When measuring inductance, optimal parameters should be from 200 to 4,000 milligeni. With the help of the megohmmeter, the power resistance of the winding of the device is 500 volts. If DPKV is good, then the obtained values \u200b\u200bmust be no more than 20 MΩ.

To replace DPKV, do the following:

First, turn off the ignition and remove the device connector.
Next, using a wrench to 10, you will need to unscrew the analyzers of the analyzer and dismantle the regulator itself.
After that, the operation of a working device is installed.
If the regulator changes, then you will need to repeat its original position (author of the video about the replacement of DPKV - channel in the garage at Sandro).

The Lambda probe

The lambda-probe VAZ is a device, the purpose of which is to determine the volume of oxygen present in the exhaust gases. These data allow the control unit correctly to proportize air and fuel to form a combustible mixture. The device itself is located on the muffler's reception tube, below.

Replacing the regulator is carried out like this:

First disconnect the battery.
After that, locate the contact of the harness with the wiring, this chain comes from the lambda probe and connects to the block. The plug must turn off.
When the second contact is disconnected, go to the first position in the receiving pipe. Using the appropriate wrench, unscrew the nut fixing the regulator.
Remove the lambda probe and change it to the new one.

Well, friends after the article, I mentioned the edge that the second is managed by a bunch of all sorts of sensors and actually without them work is not possible. Some of my audiences and readers began to ask questions - and how many of them, what do they control and what do they influence? I think this information is really necessary (for general development), so I decided to write an article. So read, it will be useful ...

It is worth noting that the injector is almost on all cars the same, respectively, its sensors are practically too. But it is worth noting that some manufacturers can differ slightly.

What are there any differences

Yet the total mass is the same. They can wear various names, but the essence remains the same. But in some modern machines, instead of DMRV (explanations and decoding will be below) DDA + DTV can be installed.

Also on some cars there is an advanced gas distribution system, which is installed by phase masters, they are hydraulic or electrical and those and others may have controlling "points"

If you do not take complex motors, how to say SkyActiv from Mazda, because they have more "ionic sensors" and not take into account the turbocharged motors (a few more is added there) otherwise the similarity is very large.

That is, we will consider ordinary atmospheric and without phase regulation systems.

What are the large number of simple motors. Well, let's start and analyze each individually.

DMRV (Air Flow Sensor)

It is usually installed on the air filter housing and the amount of absorbed air is measured (it is considered in kilograms per hour). To say that it is constantly breaking - it is impossible, still reliability at a fairly high level. However, it can still fail due to moisture, oil, grain or dust hits, this happens if the zero resistance filter is installed (or there is no filter at all). Another big minus - if you tune the motor and rock a regular vazovsky to 150 - 160 hp, then it cannot do the amount of air, for it is not designed for it.

PROBLEMS:

Owning readings. At idle 10-20% - unstable work, constantly floating momentum, poor start.
Improve indications. With large revolutions, the dullness of the motor is manifested, increasing the fuel consumption.

Normal testimony for car VAZ idle - 8-10 kg / hour. At 3000 rpm - 28 - 32 kg / h

Replacing about 2000-2500 rubles with diagnostics.

DPDZ (throttle position sensor)

Installed on the side of the choke itself and on the same axis with the throttle valve. Reads the readings of the opening or closure, respectively, pressing the gas pedal.

At one time there were many fakes that did not live and the month, so you should choose a time proven, desirable those that are put in the factory. There were also cases when they were shot down on the sinks, broke a stream of high pressure. If you consider these rules, you can live long enough.

Faults: Manifestation of failures when pressed on the gas pedal. Increase the revolutions (no with this) at idling. Jerks and failures during load

Cost of about 250 - 350 rubles with diagnostics

Dug (coolant temperature sensor)

The VAZ is installed between the head of the block and the thermostat. There are two contacts in the structure (it should be noted that the one-contact for the instrument panel is often fixed nearby - it is impossible to confuse them). The main task is to regulate the fuel mixture. Here you can draw an analogy with a carburetor, there you make it a subference, here everything is done automatically with this sensor. The colder engine, the richer the fuel mixture.

In essence, this resistor (thermistor) resistance to which changes depending on temperature. Standard values \u200b\u200bfor VAZ 100 degrees Celsius - resistance about 176 ohms, "25 gr." - 2795, "0G." - 9420 Ohm, "-20" degrees Celsius - 28680 Ohm.

It should be noted that the temperature of the coolant affects almost all the engine control characteristics.

A constructive sensor is very reliable, there is essentially to break it. Major problems may be related :

Violation of contact inside the sensor, comes from very long exploitation.
Insulation violation or wiring to it

If fails:

Turning on the fan on the cold engine
Not inclusion on hot (limit temperatures)
Difficulty Starting Hot Motor
Elevated gasoline consumption

Price of about 150-200 rubles + replacement. Changing fast enough

DD (detonation sensor)

It is usually installed on the cylinder block, between the second and the third cylinders. At the moment there are two options:

Detonation-resonance (similar to the barrel).
Broadband (similar to the tablet)

They are not interchangeable, put instead of the other - it is impossible, because they work a little in other algorithms.

It is very reliable structurally (again there is nothing to break there). The principle of operation is such - (can be compared with the piezoshigalka for the stove), the more there are oscillations of the motor (blows), the more it increases the voltage. Thus, detonation stuffs are tracked. Reads readings and sets the ignition advance angle. There is a big detonation - the ignition is installed later.

PROBLEMS: If it fails - the motor does not develop power (stupid), not smooth operation, and also increases fuel consumption.

Price about 250 - 400r + installation.

DK (oxygen sensor) - Lambda - umbrella

It is installed either side by either on the exhaust pipe of the muffler. In some foreign cars there are two pieces (before the catalyst and after). The main task determination of oxygen residues in the exhaust. If found - poor fuel mixture, if not detected - rich. Indications As usually come to the ECU and are used to adjust the fuel supply.

This is a fairly reliable electrochemical design, however, it may fail. If broke - increases fuel consumption, as well as emissions of harmful substances.

Cost from 1000 to 2500

DPKV (crankshaft position sensor)

It should be noted that this is one of the main sensors, which is needed to work the entire engine as a whole.

Forms an electrical signal when changing the angular position of a special gear, which is attached to the crankshaft. Very hardy and very simple element. It is installed on the lid of the oil pump, it is structurally similar to a piece of magnet with a coil of a thin wire. It is intended to determine the cylinder, the fuel time, and the time of the spark.

Breakfast: If it fails, the motor stops working! It also happens - the engine speed limit around 3000 - 5000.

Cost - 400 - 600 rubles

DS (speed sensor)

Forms pulses in the ECU, the number of which per unit of time is proportional to the velocity of the car. Installed on the gearbox, sees the rotation of the shafts, thus the speed is calculated. Need to generate the optimal mode of operation of the engine.

The sensor itself can work for a long time, but contacts or connectors are often oxidized. The failure causes a deterioration in the driving characteristics, the computer simply cannot understand whether the car is worth it or moves at what speed.

Ne Control: Lowned idle, turnover failures with sharp braking, a little tupit motor. On some cars, Chevrolet movement will not be possible.

Price in District 200 - 300 rubles

DF (phase sensor) or DPRV (camshaft position sensor)

Determines the angular position of the camshaft. For eight-skate engines, it is fixed in the end of the block head. On the sixteenth glove on the head of the block of about 1 cylinder.

Approximately 2005, it was not installed on the 8-valve motors that it means that the fuel injection in the intake manifold will be carried out in pair-parallel mode. That is, two nozzles open immediately.

The power units in which are established, characterized - phased injection, that is, there is only one injector nozzle in which the fuel injection should go.

Faults: If it fails, then the car automatically goes into a pairwise parallel mode, which leads to an overrunning of 10-15% fuel.

Costs about 250 - 400 rubles

As you can see the main sensors in the system about eight pieces, I want to recall once again that in some modern units there may be much more. These same are in any simple motor, which is installed on hundreds of simple machines.

Oil pressure in the lubrication system is an important operational indicator of any car, including the UAZ. Insufficient attention to the testimony of the control sensor is fraught with serious malfunctions and expensive repairs.

Values \u200b\u200bPressure oil in UAZ cars

Power installations of UAZ cars are equipped with two pressure sensors: control, controlling directional or digital indicator, and emergency. The latter gives a light signal (turns on the light bulb on the panel) if the lubrication pressure decreases to 0.4-0.8 kgf / cm 2.

The emergency sensor includes a signal lamp on the control panel if the oil pressure decreases below the set limit

Even if the motor is fully working, the pressure value depends on the operating conditions:

on the degree of viscosity of the oil;
from engine temperature;
on ambient temperature;
from the frequency of rotation of the crankshaft (revolutions);
from load;
from using oil cooling radiator.

The testimony of the oil pressure indicator is usually within 1-5 kgf / cm 2 and slightly differ for various models of "UAZ" power plants.

In 2016, the legendary Russian manufacturer of high-passable cars, the Ulyanovsky Automobile Plant turned 75 years old.
UAZ
https://www.uaz.ru/company/75

Table: Oil pressure value in various motors

Manufacturer	Engine model	Oil pressure (kgf / cm 2)
		Minimum	Conditions	Maximum	Conditions	Working	Conditions
Ulyanovsk Motor Plant (UMP)	417	0,4	Radiator included	5	Cold motor	>3.5	idling, 2 thousand rpm, 80 ° С
						>1.1	idling, 600 rpm, 80 ° С
						2–4	Ride 45 km / h
						>1.5	Riding, Heat
	4218	1,2		6	Cold motor	>3.5	Ride 60 km / h, without oil. Radiator
						>3	Heat
Volga Motor Plant (ZMZ)	409	1	Euro 3, idling, 850 rpm.	4,6
		0,7	Euro 4, idling, 850 rpm.
	4021/4104	0,5	idling, small turns.	4,5	Cold motor	2–4	Riding 50 km / h
		1	idling, middle speed.			>1.5	Heat
	5143	1.1	idling, 700-800 rpm. 80 ° С	4.5		1,1–4,5
		3	idling, 2 thousand rpm, 80 ° С

Placing oil pressure sensors on UAZ cars

The position of the sensor depends on the design of the automotive motor.

On UMNS-417 and UMW-421, the main sensor is on the right side (along the move forward) of the motor under the generator. Emergency - between drive pulleys of crankshaft and water pump.

In 1977, cargo route began on the route: Moscow - Gorky - Tashkent - Karakuma - Baku - Tbilisi - Rostov-on-Don - Kharkov - Moscow. Newspapers wrote: "Karakum mileage showed that UAZ is a car suitable for use in a wide variety of climatic and soil conditions."
UAZ
https://www.uaz.ru/company/75/karakumyi.

On ZMZ-4021 and ZMZ-4104, the main sensor is installed behind the generator. Emergency - with left (along the movement) side at the bottom of the oil filter.

Both ZMZ-409 sensors are located on the left side of the engine behind the thermostat over the collector of the exhaust gases.

On the ZMZ-5143, the main sensor is installed on the right (along the movement) at the level of the top slice of the crankshaft pulley before the oil filter.

Emergency - left in front of the GBC at the level of the top slice of the fan pulley.

In the spring of 1973, for 4.5 months, an autoprotation of Moscow journalists continued on two cars UAZ-469 on the route Moscow - Magadan - Moscow. Test drivers overcame about 40,000 kilometers.
UAZ
https://www.uaz.ru/company/75/magadan

Assessment of sensor performance

A detailed audit of the Pressure Sensors UAZ without special equipment is impossible. But if there are doubts in good condition, the approximate assessment of the efficiency of devices does not cause difficulties.

In early 1976, over the age of one and a half months, tests of an experimental sample of UAZ-452 speakers were carried out in order to create a car for the Far North. The main difference between the prototype - improved body thermal insulation. During the tests of UAZ, ISOCHIA is about 12,000 km.
UAZ
https://www.uaz.ru/company/75/yakutiya.

Evaluation of the emergency sensor

In the emergency sensor case there is a membrane, taking normally closed contacts in the power lamp power circuit under the influence of pressure. It goes out when the pressure exceeds a value of 0.4-0.8 kgf / cm2.

The emergency sensor membrane includes a power lamp power, if the pressure drops below the valid rate

Characteristic device malfunctions:

the lamp does not light up at low pressure;
the lamp is lit under normal pressure;
violation of tightness (leak oil).

Evaluation of performance without removal from the engine

When the signal light does not light up simultaneously with the inclusion of ignition, the performance of the sensor without dismantling is checked as follows:

When the lamp on the panel lights up with the inclusion of ignition, but does not fall after the motor start, and the indicator device demonstrates the presence of pressure, the performance of the sensor, without dismantling, is checked as follows:

Disconnect the wire from the sensor.
Turn on the ignition. The luminescence of the oil pressure lamp on the panel indicates that the sensor is most likely working. Probable cause of alarm failure is a closure of wiring.

Evaluation of the performance of a dismantled sensor

The efficiency of the dismantled sensor is estimated by the tester and pump. When there is no tester, use a lamp with a wire or electronic contact indicator (closure).

Violation of the tightness of the working sensor can be determined by oil fluthers under it. To check the device removed from the car it is deceived by soap foam and create pressure using the pump. Air leakage will be noticeable by abundant bubbles.

Video: Check for pressure sensor

It should be noted that the emergency sensor is a control device with regulated parameters. With the help of the tips above, you can roughly estimate its performance, but not complete serviceability and compliance with the specified specifications.

Evaluation of the control sensor of the oil pressure of cars UAZ

The control sensor is arranged in such a way that its electrical current resistance varies depending on the pressure being measured. The lower it, the higher the resistance of the sensor.

Among the faults of the car lubrication system, the cause of which may be incorrect operation or failure of the oil pressure sensor are as follows:

unstable or unreliable testing of the control device;
lack of indications;
clearly overestimated readings (arrow "Skeins").

Checking signal chains

Before you "sin" to the sensor, make sure that the control panel indicator circuits are correct.

Mustle the engine and turn off the ignition.
Disconnect the wire from the pressure sensor.
Turn on the ignition. The lack of indicators indicates that the short circuit of the wiring is not case there.
"Rush" the control sensor wire on the housing. The device on the panel must "overflow", which demonstrates the condition of the chain.

Evaluation of the control sensor without dismantling

The tester will help evaluate performance.

Mock the motor, turn off the ignition.
Free the sensor from wiring.
Measure the resistance between the sensor contact and the housing. It has about 150-300 ohms. The exact value can be found in the description of the sensor model.
Secure the tester wires on the sensor terminal and the case.
Turn on the ignition, start the engine.
Resistance should decrease with the increasing engine speed from the measured value in the static state to the minimum, which depends on both the sensor characteristics and the engine pressure in the engine.

The accuracy of the performance of the workable sensor is checked by connecting the mechanical pressure gauge instead.

Video: Oil pressure check mechanical pressure gauge

Checking the pressure sensor removed from the car

In the garage conditions, approximately evaluate the efficiency of the oil pressure sensor from the car, measuring with its help the tire pressure. To do this, you will need:

car pump or compressor;
pressure gauge;
tester;
homemade adapter hose with swap fitting;
technical characteristics of the sensor with a graph of pressure resistance dependence.

Sequencing:

The above test methods are approximate and do not guarantee the complete operation of the oil pressure sensor.

Replacing oil pressure sensors with their own hands

To facilitate access to oil pressure sensors, it may be necessary to disassemble any additional parts defined by the design of the car model and the engine. For example, the UAZ-3151 instruction recommends to pre-remove the front engine's front mudguard.

The UAZ minibus is the most popular from the regions in Yakutia. Many guests from Central Russia, surprised by the number of Uzaz, are called the Yakutia "Wolandia".
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To replace the sensors, you will need a regular set of car tools.

List of operations for replacing the pressure sensor

Video: Replacing the oil pressure control sensor

List of operations to replace the emergency pressure sensor

Turn off the ignition, disconnect the battery from the car housing.
Free access to the sensor by removing interfering parts if they are.
Open the connector, and turn off the tip of the emergency sensor wire from the wiring.
Holding the sensor fitting to the key to 19, the key to 22 unscrew the sensor and remove it.
Remove the fastening screw and remove the wire from the sensor.
Install the new sensor in the reverse sequence and connect it to the wiring.
Turn on the battery, start the engine, appreciate the sensor performance.
Inspect the sensor visually. If oil leaks are noticeable, slightly tighten the threaded connection.

Gallery: Removing the emergency pressure sensor

Checking the performance and replacement of oil pressure sensors UAZ - a simple operation available to any owner. The main thing is to know what to do.