VAZ-2112 does not start: the causes and their elimination

Every car owner VAZ-2112 is interested in what to do when his car does not start. The key to successful repair is peace and reason. Never panic, but determine the true cause of the problem. If VAZ-2112 does not start, you need concentration and self-control.

What you need to know about diagnosis

Simple advice: you do not need to drive your car for scan by the scanner. Due to the fact that laptops are now almost in every home, there are a lot of unscrupulous establishments where you can pass such a check. When the program does not notice errors, they answer you that everything is in order with your car. By and large, this diagnosis can be called a simple pumping out of money.

Good diagnostics should proceed as follows:

• Errors are first read.

• The signals coming from the sensors on the injector are checked.

• The pressure that produces the fuel is measured.

At the very end you need to get the correct answer, what happened and what you have to do with the car in the future. If the car enthusiast has an engineering vein, he can try to find the reason why the VAZ-2112 does not start. In this case, you can solve the problem yourself, saving on services.

We check the devices

When it was noticed that the VAZ-2112 does not start, it is necessary to turn on the ignition and carefully look at the dashboard. It should display an alarm in the form of light bulbs:

• Low oil pressure.

• Normal battery charging signal.

• Chek Engin signal.

If the dashboard does not respond at all and does not light up, you should look for the reasons why the power does not come. To do this, check the fastening of the terminals on the battery. Also pay attention to the fuses. When the dashboard is working, the VAZ-2112 repair should continue as follows. Switch your attention to the Check Cheg lamp. This warning lamp is activated on an unblocked engine and informs the computer that it is in good condition and has passed and is being fed to it. If the Chek Engin alarm is not on, check all computer fuses. They are located to the right of the driver, near the front passenger seat (under the glove compartment). At this point, the computer (electronic control unit) is located, and with it the so-called strap, where there are three relays and a safety block. The first relay is responsible for the computer. Device number 2 - start the fan. And the relay under the third number works in conjunction with the fuel pump. When the key turns in the ignition, the devices numbered one and three should click - this is the supply of electrical power to the fuel pump and the control unit. You do not need to continue repairing the VAZ-2112 until the Chek Engin light bulb is in good condition.

If the repair ideas are exhausted, try connecting the faulty ECU and thus check. This will determine whether there is a problem in it or not. If the Warning lamp "Chek Engin" still does not work, most likely the ECU is faulty. Without it, the car will not start. Speaking about the price of the computer, it is worth noting that this is not an expensive thing. It costs about $ 100. Some spare parts for VAZ-2112 are quite expensive. The control unit is one of them. If you compare with the fact that the car VAZ-2112 price is from 150 thousand rubles, it is unlikely that anyone will buy a spare unit.

Check of work of the fuel pump

When turning the key in the ignition mechanism, you should hear a distinct sound in the area of the rear seats. This rumble creates a running pump that pumps fuel. When there is no sound, it is necessary to check the relay, which is responsible for the gasoline pump, and the corresponding fuses. If the problem is not in them and they work without complaints, it is necessary to measure the voltage that passes through the terminals of the pump. If there is no voltage, look for the problem in the corresponding wiring.

Check the operation of the starter

To check the operation of the starter, turn the ignition key. When your VAZ-2112 does not turn the starter and it does not respond to turning the key, you should check the battery charge. With sufficient battery voltage, you need to check the quality of the terminals to the starter and the correctness of the retractor relay. If the starter works correctly, you should proceed to the next repair point.

Checking the spark

When the Check Engine is running, the gasoline pump is working and the starter is functional, the next check point is a spark. To check it, you need to unscrew the candle, press it to the mass and start the starter.
The check takes place in turn, on all cylinders. Such problems happen on many injection cars VAZ-2112. The price of a new starter, by the way, is 2-3 thousand rubles.

Variants of development of situations

• The spark is present on the candles of all cylinders. This is already a good sign. Proceed to the next step.

• The spark takes place on the first and fourth cylinder, but on the others it is absent. Output: the ignition coil 2112 does not work.

• The spark takes place on the second and third cylinders, on the other - is absent. The conclusion is the same as in the previous paragraph. Also replace the ignition module. When after the replacement of this element the problem has not gone away, the fault is caused by the malfunction of the output keys to the ignition module from the electronic control unit. The repair of the unit will solve this malfunction.

• When there are no sparks at all, the most probable cause may be a crash of the crankshaft position sensor, from which the commands for its formation are sent.

Visual inspection

For visual inspection of the candles, they must be unscrewed from the cylinder. After the dismantling, a visual inspection is carried out. We need to assess whether they are wet or not. When all the elements are dry, most likely, the injectors incorrectly spray the fuel. In this case, you need to check the fuel ramp, or rather the pressure in it. On her side, you can find a bolt, after twisting it to the vacant seat, a pressure gauge is installed to check. When the element is in place, it is necessary to turn on the pump, which pumps the fuel, and the device will fix the pressure in the ramp. If there is no pressure gauge, simply leave the bolt hole open. When the pump is on, a jet of fuel must flow from it. If there is no pressure, check the fuel filter. Also inspect the line that leads to the ramp from the tank. When the problem is in the filter, replace it. Spare parts for VAZ-2112 of this type are inexpensive - up to 200 rubles.

If wet

In case of detection of wet candles, they must be removed and dried. Then they should be put in their place. If after such work the car still does not start, and the candles are filled with gasoline, the next stage is checking the gas distribution label. For this, a plastic casing is removed, the marks on the camshaft and its gear are checked; Do not forget about the mark on the crankshaft gear. If they are in the wrong position, there was a violation of the gas distribution. Also, it is worth checking the key, in close conjunction with which the DPPC operates. The second reason that candles can be filled is the clogging of the injectors. In this case, they must be cleaned.

Conclusion

Here, in fact, and all the most common causes, which affect the engine start. As you can see, if VAZ-2112 does not start, the problem can be solved independently.