Lost spark on VAZ 2112 injector 16 valves, reasons, diagnostics

MAIN REASONS WHY THERE IS NO SPARK APPEARING IN THE IGNITION SYSTEM

In the VAZ 2110 car, injector errors appear quite often. You can see them on the on-board computer, but special tables are needed to decipher them. After all, the ECU produces errors in the form of codes that consist of the letter P and four numbers. Before you begin to solve the problem that has arisen, you should find out what problems there are in the VAZ car.

How to check the ignition module on a VAZ-2110 injector 16 valves

VAZ-2110 engines with a two-shaft head with 16 valves are built on the basis of the old one and a half liter VAZ 21083 engine. Changes affected only the cylinder head and air supply system. Twin-shaft 16-valve engines were installed in two types - a 1.5-liter engine (VAZ-2112) and a 1.6-liter engine (VAZ-21124). The ignition system on these engines is different. Today we will look at the ignition module for the injection 16-valve engine 2112 and find out its differences from the 1.6-liter engine 21124.

Design of the ignition module of a 16-valve engine on a VAZ-2110

Despite the similarity in engine design, the ignition system of the 1.5-liter injection 16-valve engine differs from the 1.6 16-valve engine. The 1.6 liter engine uses an electronic contactless ignition system with individual coils on each spark plug. Therefore, there was no need for an ignition module. Such a system is more reliable and cheaper to operate, since if one coil fails, there is no need to replace the entire module.

VAZ injector errors

Errors can relate to any part of the car:

1. Sensors Most often, temperature sensors suffer, as they can overheat too much;
2. Injectors. Mostly, problems are observed due to an open circuit, as a result of which they cannot light up in time. This leads to another problem - the spark has disappeared, so the engine does not start;
3. Engine. The most common mistake is overheating. Most often, due to increased oiliness, the spark plugs also overheat, so a spark does not appear. As a result, the engine does not emit any signs of life;
4. Valves. They can also be too dirty, which will cause them to close, so they will not pass the fuel-air mixture;
5. Fans. If they do not work correctly, the machine overheats.

What if the spark is lost?

If the engine does not start, but sounds are made indicating that the fuel pump is working, you should pay attention to the operation of the ignition. First of all, you should check whether the spark has disappeared on the wires with high resistance. To do this, it is necessary to use a spark gap, as well as a Hall sensor, which checks the presence of a magnetic field.

WHEN THE ARRESTER IS CONNECTED TO THE VAZ CAR, IT IS NECESSARY TO TURN THE ENGINE WITH THE STARTER. TYPICALLY, A SPARK WILL BE OBSERVED DURING THIS PROCESS. IF IT IS NOT, IT MEANS THERE IS NO BREAKDOWN TO GROUND OF THE WIRE. IT IS COMPLETELY POSSIBLE THAT THE SPARK HAS DISAPPEARED DUE TO A BREAKDOWN OF SOME WIRE. IF THERE IS NO SPARK ON SEVERAL WIRES AT THE SAME TIME, THEN THE CONTROLLER IS MOST LIKELY FALSE.

Hall Sensor

The possibility of breaking high-resistance wires is also not worth it. To do this, you can use a Hall Sensor, which helps measure the current in conductors, as well as their resistance. To check the operation of the ignition coils, you should pay attention to whether there are any error codes on the controller. If there is no spark after replacing the coil, then the controller is faulty.

We check the ignition module of the 16-valve VAZ-2112 with a multimeter

The situation is as follows: for no apparent reason the engine began to “trouble”, the thrust was lost, and the idle now does not even reach 500. I removed the high-voltage wires one by one, and so, there was no spark at all in cylinders 2 and 3. The engine is 16-valve, but without “individual coils”. The question is how to check the ignition module on a VAZ-2112 engine, and it is advisable not to remove it. Inside the module, in addition to the coils, electronics are installed. How can I check if it's working properly?

Checking the VAZ-2112 ignition module with your own hands

Inside the ignition module there is such a board

It is clear that we are talking about the 21120 engine and the ignition module 2112-3705010. By the way, there will be two more numbers in the article numbers - they indicate the manufacturer.

All elements of the ignition system

Four wires are connected to the module connector:

• Blue-red – nutrition +12;
• Brown – “mass”;
• White-blue – signal for candles 1 and 4;
• Gray-red – candles 2 and 3.

Testing for spark

If there is an ignition coil on each of the engine cylinders, then testing for the presence of a spark occurs somewhat differently. In this case you will also need a Hall Sensor. If there is no spark on only one coil, then it should be replaced. But if it doesn't appear at all, then the problem is much more complicated. In this case, the problem may be due to a faulty controller or broken wiring.

To more easily test the presence of a spark discharge, it is advisable to use a Hall Sensor.

It must be brought to the faulty coil and turned on. If the arrow starts to rise, it means there is current in the wires.

VAZ 2112 2001 No Spark on 2-3 Cylinders

#1 ace

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#2 aslan

• City: Terek
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So we have 2112 16kl 1.5, 2001. there is no spark on 2-3 cylinders, further testing revealed that there is no signal from the ECU to them. The ECU is Bosch 1.5.4, although it is not essential that January 5.1.2 was installed on this car, the picture remained the same. The coil is known to be in good order, plus there is a minus from the ignition, the ECU was also checked on another car, the connecting wires to the ECU ring without breaks or resistance, the ECU communicates, there are no errors. although on the Boche the crankshaft sensor popped up. The question is what is the ambush?

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#3 unsed

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#4 evgegor

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#5 ace

• City: Belaya Kalitva
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The disk is ideal, I felt the wiring centimeter by hand, are there any other side reasons, like 10V power supply or something similar?

I unpicked the connector, everything is fine, the pins match

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#6 Alex905

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#7 melnik-1

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#8 ace

• City: Belaya Kalitva
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The car was made on the road, in the field, so to speak, the oscillators will be there tomorrow, it was checked for a spark gap

The contacts are in their places, as are the pins, I’m stunned, apparently Bosch is doing something weird, we’ll sort it out tomorrow

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#9 Alex905

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1. APC ADACT
2. → Diagnostics
3. → Domestic cars
4. Forum Rules

ARS ADACT develops firmware for chip tuning of gasoline and diesel engines. Ready-made calibrations for any task are available in the official store: more than 60 brands and 300 models, for LPG, with the transition to other Euro standards and preservation of factory ones. If there is no ready-made firmware, you can order individual calibration for any task.

Common mistakes during diagnostics

Most people, due to ignorance of the VAZ 2110 injector machine, make many mistakes in the process of identifying problems.

Let's look at some of them:

• Many people make a common mistake: when they see that there is no spark, they want to check it for breaks. For this purpose, they place the wire close to the ground of the machine. But when performing such actions, the ignition module may break, so under no circumstances should you do this;
• Another problem is checking the spark discharge. If you place spark plugs on the engine body, a large induction current may appear. This occurs even due to slight contact of the spark plug with the ground, as a result of which the controller can also be damaged. Therefore, it is necessary to use a spark gap that will not allow the distribution of ignition with the same supply of high voltage to two spark plugs at once.

Possible reasons for absence

Most modern cars are equipped with many sensors. They make the life of the car owner easier and complicate repairs. In the electronics responsible for the operation of an injection engine, there are several sensors responsible for the spark formation process. But the reasons that there is no spark (VAZ-2110, injector, 8 valves) may also lie in other components. There are several types of possible breakdowns. The first includes various problems in the car’s fuel system. This includes malfunctions in which fuel cannot enter the cylinders or the supply is interrupted.

If there is no spark (VAZ-2110, injector, 8 valves), then this may be due to the fuel system. Often the pump relay or the submersible element itself fails. The test is performed by ear.

Then there are problems related to the electrical part. These are some of the most common faults. In case of such breakdowns, no electric discharge reaches the spark plug. Naturally, the mixture will not be set on fire. Global problems include complete engine failure and timing belt breakage. It is not worth dwelling on these malfunctions in detail.

Hall sensor for system diagnostics

A Hall sensor is a device needed to measure the magnetic field, current, and resistance in conductors. Currently, there are two types of such devices: analog and digital. The latter can determine where there is and where there is no magnetic field. That is, it can be used if the spark in the VAZ 2110 injector is lost.

ANALOG HALL SENSOR CONVERTS THE FIELD INDUCTION INTO VOLTAGE.

And the value shown by him completely depends on the polarity of the field, as well as its strength.

The engine won't start?

If, as a result of the check, it became clear that the spark hits the spark plugs, but the VAZ 2110 injector engine still does not start, then it is also necessary to diagnose it. The faults that cause this problem can be serious or not very serious.

At the same time, it is sometimes possible to cope with their solution without anyone’s help:

1. It is necessary to purchase a spark gap and a Hall Sensor, which is inexpensive, but has an irreplaceable purpose. With their help, you can find out about the presence of a spark in the candles;
2. Check the spark plugs to see if they are OK. A spark gap can be used for this purpose. However, you need to remember that the controller will be broken if candles are placed on its body;
3. Perform fuel pump diagnostics. When you try to start a VAZ 2110 car, a characteristic sound will appear from under the rear seat. If there is no sound, then you need to check the fuses and the main relay. In a VAZ 2110 car they are located behind the side cover of the driver's seat.

If, after diagnostics, problems were identified with one of these elements, then you can fix them yourself. Usually the spark plugs begin to work after proper wiping, although this does not always happen, so they have to be replaced.

If the starter turns

It is the ignition module that becomes a stumbling block and a big problem in VAZ-2110 models. You can verify the correctness of the assumption by testing it with a working device. By installing a 100% functioning part on your car, you will be able to eliminate one possible malfunction. When you try to start everything works. The power supply stops due to the module chip. It is recommended to check the entire power supply system.

A faulty crankshaft position sensor can cause loss of spark. The main element of the entire ignition system controls the operation of the cylinders. An oscilloscope is suitable for testing. Hardware-free diagnostics in this case will not bring results. Most likely, the sensor will need to be replaced.

If the light is on

Sometimes the injector fault light stays on until the engine warms up to 90 degrees, after which it stops flashing. This is usually observed in winter, when there is severe frost outside. And although the problem is not serious, it will have to be solved. It happens like this:

1. Replace the injector sensor;
2. Get the firmware installed at a car service center;
3. Remove the battery terminals. Perhaps the light came on, but never went out.
4. And after removal, the injector will be overloaded.