If the VAZ 2114 does not start, then you should not be very upset. The article discusses the main diseases, breakdowns, as well as ways of elimination.
The content of the article:
- No spark
- No gasoline
- No spark and no gasoline
- Conclusion
VAZ 2114 will not start in different ways. Can be divided into several groups. The main group is the lack of spark. Group 2 is the lack of fuel. The third group is the absence of both.
VAZ 2114 will not start - no spark
The operating system of the VAZ 2114 is a typical injection engine. Using the crankshaft position sensor, the control unit determines the position of the pistons in the cylinders, after which it supplies them with a spark or gasoline. So, a conventional eight-valve 21124 engine has a typical malfunction. The fact is that the crankshaft position sensor chip tends to rot away. A new chip in the store costs 15 rubles, replacing it takes 15 minutes. In most cases, this will solve all problems.
Now we will consider more complex cases when the VAZ 2114 will not start. First, you need to make sure that power is supplied to the ignition module. To do this, remove the chip from it, after which we measure the voltage at the central terminal and the mass of the car. With the ignition on, there should be 12 volts here. If 12 volts are not here, dig in the direction of the control unit malfunction. This is the most difficult diagnostic case, so we will not consider it.
We made sure that 12 volts are supplied to the ignition module along the positive line, you need to know for sure that the ignition module itself is working properly. It must be said right away that the diagnostics of the ignition module is usually relative. It allows you to check the integrity of the coil, resistance. However, it does not allow measuring the inductance, as well as the breakdown voltage at the moment of ignition. In addition, this position does not allow checking the accumulation time of the coil. Therefore, we take a regular cartoon, check the resistance between the second and third terminals of the coil.
The resistance here should be about 1.2 kOhm, if it is less than 1 kOhm, the coil should be replaced. This indicates that the primary ignition circuit is in a short circuit. After that, we check the secondary coils of the ignition module. To do this, we measure the resistance between the first and fourth, second and third terminals for high-voltage wires. Here, the resistance of the coil may differ from each manufacturer, so it is best to look at the relative resistance, that is, it should be approximately the same.
If there are no more reasons, we check the high-voltage wires for resistance. Wire resistance for 4 cylinders should be no more than 5 ohms. The resistance for the armored wire of the first cylinder should not exceed 10 kOhm. The last item to check out is this candlestick. In general, in this case it is easier to screw in new ones, since there is not a stand for checking spark plugs in every city in general.
The best candles for a conventional 8-valve VAZ engine are a17dvrm.
VAZ 2114 does not start dry candles
If the VAZ 2114 does not start, first of all we unscrew the candles. The fact that they are dry indicates that no fuel is being supplied to the cylinders. If there is a spark, then we immediately discard the crankshaft position sensor, because the control unit definitely understands the position of the cylinders at the moment in time, since it supplies a spark to the spark plugs. First, turn on the ignition and listen to whether the gas pump is working. If the fuel pump does not work, then first of all we check its fuse. In addition, it is worth paying attention to whether the fuel pump turn-on relay clicks after the ignition is turned on. If this is not the case, then the matter is most likely in the ignition switch, or the relay itself is faulty. If the relay clicks, this indicates that the fuel pump activation circuit is closed. Then you need to check the voltage on the relay, after which we remove the back seat, remove the chip from the fuel pump, turn on the ignition and measure the voltage on the chip. In general, the fuel pump chain runs through the cabin, so something rarely happens to it. From this we conclude that the gas pump most likely just burned out. After the replacement, everything will fall into place.
If the VAZ 2114 does not start, the fuel pump is working, the starter is turning, then you need to pay attention to whether there is fuel in the fuel rail. For this there is a special spool, which is closed with a black cap. After turning on the ignition, you need to press on this spool, fuel should hit from the ramp. If this does not happen, then we either check the fuel pressure regulator by squeezing the return line into the fuel tank, or change the fuel filter. Ideally, a pressure gauge should be screwed onto this spool, which will indicate the pressure in the fuel rail. It should be 3.2 atmospheres after turning on the ignition. If you squeeze the return line, then the pressure should be at least 6 atmospheres.
When we are convinced that there is pressure in the fuel rail, we need to make sure that the injectors open. To do this, remove the chip from any injector, and then add the voltage on the red-pink wire when the ignition is on. This is a common plus. It is constant on the injectors. If 12 volts is not observed on this line, then we go to look in the control unit.
VAZ 2114 does not start, the starter does not turn
VAZ 2114 does not start, the starter does not turn, then the first thing you need to pay attention to is the retractor relay clicks. If it clicks, remove the starter, disassemble the retractor relay, and then protect the pins-contacts.
If the starter does not turn, there are no clicks, then you need to listen to see if the starter relay clicks. If it doesn't click, then we just change it, the problem goes away. If the relay clicks, but the starter does not click, then the retractor relay must be changed.
Conclusion
In conclusion, it is worth clarifying that there are far from all the reasons why the VAZ 2114 may not start. Unfortunately, the quality of parts recently, not only for domestic cars, has gone for the worse, so you can wait for anything. For example, there are times when a new injector fails immediately after installation. There are times when a new gas pump immediately after installation cannot pump pressure above 2 atmospheres. Therefore, when diagnosing faults, it is worth considering any option, despite the previous repair operations.
WHA
