Where is the VAZ 2109 oil pressure sensor located and its malfunctions

Where is the oil pressure sensor located on the VAZ 2109 carburetor?

All owners of the VAZ-2109 must monitor the oil pressure so that the internal combustion engine operates normally. DDM is a device that monitors the oil level in the engine. When there is no oil pressure, the red indicator light, which is located inside the car on the instrument brush, lights up. Where is such a sensor located? Its place is in the engine compartment of the engine. Engine lubrication and pressure sensor do not depend on whether a carburetor or an injector is installed in the engine.

Where is the oil pressure sensor located on the VAZ 2109 carburetor?

Does the VAZ-2109 oil pressure sensor work?

To determine if it is correct, you need to check the engine oil level. To do this, you need to open the hood and pull out the dipstick. In order to check more accurately, you need to do this:

drive into a pit and remove the protection;
get close to the sensor;
turn on the ignition;
disconnect the power cord;
Use a voltmeter to measure the voltage between the block and ground. It should show 12 volts.

If there is no voltage, then there may be a problem in the contact or a broken wire.

VAZ-2109 owners check the sensor in different ways:

First.
Remove the DDM located above the oil filter, turn the starter, the engine cannot be started during such a check. If all is well, oil should flow out. Then visually check the condition of the sensor. If there is no damage, then wash it with gasoline. They are installed in place. The light will go off. If it continues to burn, then it needs to be changed. Second. Check the oil level. If it’s low, add lubricant, then check again whether the light is on or not. Next, warm up the engine and then turn it off. Then connect to a pressure gauge. This adapter from the pressure gauge is screwed into place of the sensor and grounded through the ground of the car. Connect the signal LED to the battery positive and the sensor, start the engine and step on the gas. When the pressure gauge reads 1.2-1.6 bar, the LED goes out. If it lights up, then the DDM is broken.

The car owner must always monitor the condition of the DDM. After all, he also has problems. And these problems can affect the technical condition of the machine. You should not allow breakdowns, because if the engine jams, this will lead to large financial expenses.

Device DDM VAZ2109

Main components of DDM:

Frame
Measuring membrane
Transmission mechanism

Operating principle of DDM

Depending on the pressure in the oil system, the membrane bends and at the same time closes or opens electrical contacts. Before checking the pressure sensor (controller), be sure to check that the engine oil level and oil filter are in order. Visually check for any lubricant leaks on the motor housing. If everything is in order, we can move on to checking the controller himself.

How to check the controller

Everything related to any pressure is usually checked with a pressure gauge:

Screw the pressure gauge into place of the sensor and start the engine
At the same time, at idle, the pressure gauge should show a pressure of 0.65 kilograms of force per square centimeter or more
This allows us to conclude that the lubricant pressure is OK, but the pressure sensor is faulty, and therefore you need to urgently replace the oil pressure sensor on the VAZ 2109

When you don’t have a pressure gauge at hand, and suddenly the oil pressure light comes on in the middle of the highway, you can check the lubricant pressure controller in another way:

To do this, you need to unscrew the sensor itself and turn the engine with the starter without starting it
If, when the starter rotates (see Repairing the VAZ 2109 starter yourself - an opportunity to save a lot of money) oil flows from the sensor socket, it also becomes clear that the controller is faulty and needs to be replaced

After removal, carefully inspect it; if no visible defects are found, rinse it:

It is recommended to wash with diesel fuel or gasoline
You can inject liquids using a syringe or a powerful pump
Now we put the controller in place and check whether the control lamp lights up
If after washing the pressure lamp is on, buy a new controller
Repairing the old one is pointless - it won’t work properly anyway
And a new one costs a penny

Another way (more accurate) to check the functionality of the sensor and at the same time the bypass valve:

We check the lubricant level in the engine with a dipstick indicator
Top up to level if necessary
Check again whether the lamp on the dashboard lights up (if not, then the problem is solved, if not, proceed to the next step)
Warm up the engine to its operating temperature and turn it off
Screw the pressure gauge into the sensor socket
We connect the ground from the pressure gauge to the ground of the car
We connect the control LED with the “+” terminal of the Battery and the sensor contact (additional wiring is required)
We start the engine and press the gas so that the speed rises smoothly
When the pressure gauge reads 1.2-1.6 bar, the LED must go out
If this does not happen, it means that the VAZ 2109 oil pressure sensor is faulty; replacement will solve this problem

However, if the diode goes out, then the controller is working, and the lamp is on for a completely different reason, to determine it, do the following:

We bring the engine speed to 2000
If at its temperature the pressure gauge pressure shows less than two bar, this means the crankshaft bearings are worn out.
If there are two bars or more, check further
Raise the engine speed
If the pressure suddenly jumps to seven bar, it means the bypass valve is not working
It should be replaced with the oil pump cover together

Replacement of DDM

To perform some of the above-described checks, as well as replace the sensor with your own hands, if it is found to be unsuitable, our further instructions have been written:

A key set to “21”, the only necessary tool, and of course a replaceable lubricant pressure controller
Disconnect the wire from the sensor

Remove the wire from the controller

Using the key to “21”, unscrew the sensor

Unscrew the controller with the key “21”

The controller is sealed with an aluminum ring-shaped gasket
We screw in the new controller, and do not forget to connect the wire to it

This completes the replacement of the VAZ 2109 oil sensor, as you can see it takes more time to identify the cause.

Replacing the oil pressure sensor VAZ 2109

The process of removing and installing the sensor is quite accessible to any car enthusiast. Before screwing in the new sensor, you need to check the markings.

Experts recommend installing a new sensor with the same markings as the old one.

First you need to disconnect the wire with the protective cover from the sensor.

Using a wrench, unscrew the bolt and remove the sensor.

Install the new sensor in place.

After this, you should tighten it until it stops with a wrench.

Finally, you should start and stop the engine several times to check its operation and absence of malfunctions.

Where is the oil pump on the VAZ 2109

Its location is behind the crankshaft pulley. As a result of this circumstance, it will not be possible to get to it without removing some parts, in particular, the pulley itself and the oil pan. Below is a photo showing the oil pump in its seat.

When to change the oil pump

If the pump fails, the following things happen:

The oil pressure drops, as a result of which the corresponding control light on the dashboard lights up.
Oil consumption increases, and it constantly has to be topped up (however, this does not always happen).

How to replace the oil pump on a VAZ 2109, 2108, 21099

Tools:

Before you begin the replacement, prepare all the necessary tools. This is a set of wrenches, a set of sockets, a universal joint and an extension. If the pump is replaced with a new one, then buy the necessary spare part (its catalog number is “2108-1011010″). Also, drive the car into a hole or overpass, otherwise it will be very difficult for you to get to the pump.

Removal:

1) Remove the crankshaft position sensor. It should be noted that this is only relevant for an injection engine; if the engine is carburetor, skip this point.

2) Drain the engine oil.

3) Next, remove the toothed pulley.

4) Now you can remove the oil pan. Then find the oil receiver and unscrew the bolts that secure it, and then remove it.

5) Take the correct size socket and extension and use them to remove the 6 bolts that secure the oil pump to the engine block. Be extremely careful as there are washers under the bolts and it is very important not to lose them.

6) Ideally, after step 6, the pump should be removed, but in practice this does not always happen. If this is your case, take a thicker screwdriver, insert it between the pump and the main bearing and gently wiggle it (remember, do not damage the bearing!).

7) Carefully remove the oil pump.

Installation:

1) Before you install a new unit, follow one very important procedure. You need to find the drive gear and turn it like this... (continued below)

2) So that its position coincides with the special flats located on the crankshaft.

3) Now take some engine oil and lubricate the front crankshaft oil seal (more precisely, its working edge).

4) Is the oil seal lip lubricated? Install the pump onto the crankshaft. For this you will need an ordinary pencil. It will be needed to tuck the oil seal into its place (this must be done strictly with the unsharpened end of a pencil!). After this, screw back the 6 bolts securing the oil pump, not forgetting the washers.

5) Now reassemble the remaining parts in the reverse order of removal. Archive important!

Since you will have to remove the timing belt to get to the timing pulley (and at the same time the radiator along with a number of other parts), be extremely careful with the crankshaft when changing the pump.

It must not be allowed to rotate at a significant angle, otherwise the pistons have every chance of meeting the valves, as a result of which they may become deformed, and this will lead to dire consequences.

Source: https://avtgid.ru/zamena-maslyanogo-nasosa-na-vaz-2109.html

What to do if the sensor lights up

If the oil pressure light on the dashboard comes on and does not go away for a long time, it can be assumed that there are problems with the engine. Sometimes this may be due to a loose wire.

There are several main reasons why the warning light on your dashboard comes on. These include:

installation of a low-quality oil filter. Low quality filters are not able to retain oil after the car is stopped. The solution is to replace the oil filter;
insufficient oil level. In this case, it is necessary to add oil to the required level and find the cause of the leak;
oil pump damage. It is recommended to have this problem repaired at a service station.

Thus, the oil pressure sensor on the VAZ-2109, despite its small size, plays a rather important role in ensuring the correct and stable operation of the car.

It requires constant monitoring and, if minimal signs of malfunction appear, mandatory replacement. This is the only way to extend the life of the engine of any car and avoid unnecessary financial costs that may arise due to sensor malfunctions.

On a note

Don’t fall into a premature panic, draw too hasty conclusions, drive to a service station and pay money for faults that might not even exist! An emergency pressure lamp indicates a drop in lubricant pressure in the system, insufficient oil level in the engine, but it is not yet a fact that this is the reason. A fairly common malfunction is when the oil pressure sensor itself has failed and, accordingly, simply “lies.” If you don't notice this right away and don't understand the reason, you can really waste a lot of money or cause yourself more serious problems.