Multimeter how to check the ignition module of a VAZ 2110 injector 8 valves

Ignition module

As mentioned above, the “ten” has 4 engine types: 16 and 8 valve internal combustion engines, as well as with a volume of 1.5 and 1.6 liters. This will lead to differences in the ignition modules. Depending on the installed engine with a certain volume, its own ignition module will be installed.

Differences

The main differences between the modules will be the size and mounting holes. In a 1.5 liter internal combustion engine, the ignition module is larger in size in contrast to the 1.6 liter engine. The cost of the modules depends on the manufacturers, but it should be noted that the MZ from a 1.5 liter engine is always more expensive than a 1.6 liter one.

16 valve MZ

In a 16-valve internal combustion engine, the ignition module is installed on the valve cover near the oil filler neck.

8 valve MZ

The MZ on an 8-valve engine is installed on the front of the cylinder block between the dipstick and the breather.

Classic, family 2101-2107

Domestic VAZ cars of the “classic family” (models 2101-2107) are equipped with carburetor and injection engines. Cars with carburetors have an ignition coil (or "bobbin") installed. The arrangement of the element is as follows: the part is mounted on the left mudguard in the engine compartment of the car, and is attached to the body using two nuts.

Cars with installed injectors (VAZ 2107) have an ignition module. It is mounted on the cylinder block of the car's power unit. The part functions together with the engine's electronic control unit, and the ignition coils are included in the design of the entire module.

The ignition module used is a universal model (installed on other domestic cars)

For the injector and as part of the BSZ, a coil 027.3705 is used, analogous to 27.3705 (ATE-2).

The characteristics of the “injection version” of the VAZ ignition coil are as follows:

Operating temperature from -40° C to +85° C Resistance value: primary winding (0.45+0.05) Ohm secondary winding (5+0.5) kOhm Supply voltage 12 V Overall dimensions 72x156 mm, oil-filled design

Device

The ignition module has a common structure regardless of engine size. Inside the switch there are two high-voltage coils and an electronic circuit with many keys.

The coils are designed to switch high voltage and supply it to the spark plug to form a reliable spark in the combustion chamber of the engine.

The ignition module produces a spark in pairs, that is, each of the coils located inside the module is responsible for generating a spark on two cylinders: the first-fourth, the second-third.

Diagram, procedure for connecting VAZ high-voltage wires.

First, let's decide which of the four cylinders is first?

The first cylinder in front-wheel drive VAZs is located closer to the timing belt. If you look at the engine from the front, the first cylinder is the leftmost). And then everything is simple - from left to right - 1, 2, 3, 4.

In rear-wheel drive VAZ Classic and Niva, the first cylinder is located closer to the front bumper of the car.

Symptoms of a problem

Based on some signs, it can be determined that the culprit of a malfunctioning internal combustion engine is the MZ. Below is a small list of symptoms indicating failure of the MH.

• Failure of two cylinders at once, namely 1-4 or 2-3;
• Increased fuel consumption;
• Detonation at idle speed;
• The engine does not develop power;
• Difficult starting on a hot internal combustion engine;

These signs indicate a malfunction in the ignition system. These signs also apply to other possible breakdowns: spark plugs, wires and even injectors, but first of all you need to pay attention to the MH.

Replacement

Replacement is quite simple and effortless. To replace, you will need a ratchet with an extension and a 10mm socket.

Replacement process

• We remove the negative mark from the battery, since the work is carried out on the electrical equipment of the car. This will avoid an unintentional short circuit in the vehicle's network.

• We remove the high-voltage wires from the MZ and the power connector.

• We unscrew the nuts securing the MZ and dismantle it.

Pay attention to the order in which the wires are connected. Do not confuse them, otherwise the car engine will not start. Cylinder numbering starts from the timing mechanism from left to right. Connect the wires as it is written on the Ministry of Health.

Source

Module check

After signs similar to failure of the ignition module appear, it must be checked before buying a new one, since its cost is not cheap.

There are three ways to check: substitution, visual inspection and a multimeter.

Substitution

The best and easiest way to check the MZ is to install another known good one from another exactly the same car. After which it will immediately become clear what the matter is and whether the Ministry of Health is to blame for this problem.

Visual inspection

It is necessary to inspect the module for chips, cracks, etc. There should be no damage to it. There should be no moisture or rust on the contact part.

Multimeter

Testing with a multimeter is carried out using the results of voltage and resistance measurements. This will help identify the cause of the failure of the module or its control circuit.

Step by step check

• Remove the power supply from the module. On the multimeter we set the DC voltage measurement limit to 20V. We turn on the ignition on the car and connect the multimeter contact on one side to the power block (namely to connector 15), and on the other side to the engine housing. The voltage between pin 15 and the motor housing must be at least 11-12V. Otherwise, the power supply circuit of the MH is faulty, or the battery is discharged.

• Next, we check the resistance on the VAZ 2110 ignition module itself. We set the multimeter to the resistance measurement parameter, namely 200 Ohms. We connect the multimeter probes to the high-voltage terminals of the MZ: 1-4, 2-3. The resistance of these coils, with a working MC, should be within 5 ohms.

• Then the resistance at the MC input is checked. One multimeter probe is connected to the central contact and the resistance is measured first on the leftmost contact and then on the rightmost one. The resistance should be in the 5 ohm range.

The simplest but 100% accurate diagnosis

Popular wisdom states that the shortest path is the straight one, and the crowbar and ax method is the most effective. The easiest way to carry out diagnostics and obtain reliable information is by borrowing or purchasing a new module. It must be in working order. The old part should be carefully removed and the same new block, borrowed or purchased, should be installed in its place. The situation will immediately become clear - the car will either start or not.

This procedure is elementary and simple. The only difficulty is getting spare parts. However, this is not really such a problem. You must first try to find her, ask around, make an effort. Only through experience will it be possible to establish the truth. Someone will most likely help by borrowing the required module for a short while. A broken module needs to be repaired or replaced. A car in which something else has broken naturally should be inspected more carefully.

Cost and article

The table below shows the cost of the VAZ 2110 ignition module depending on the manufacturer and VAZ engine size.

We check the ignition module on the injection VAZ-2110 8 valves with our own hands

At different times, different engines were installed on the VAZ-2110 car, both carburetor and injection. However, regardless of the type of power system and the number of valves (8 or 16), all engines are assembled on the unit base of the old engine 21083 and 21093. The most progressive of these engines is the 16-valve 1.6-liter VAZ 21124 engine with a power of 89 horsepower. Today we will touch on the ignition module for 8-valve engines 2111 and 21114 (1.6 l), check its performance and find a suitable replacement for the failed module.

Priora, 2170-2173

The Lada Priora is equipped with the same ignition coils as the Kalina. The coil is marked 2112-3705010-12. Just as in the case of Kalina, Priora is equipped only with injection engines, so carburetor ignition coils or “bobbins” cannot be installed on the car.

To summarize, it is worth saying that when choosing an ignition coil for a car, it is necessary to take into account the marking of the part, its compatibility with a particular model of the domestic automobile industry. Despite the high interchangeability, attention is also paid to the overall dimensions of the part and the type of fastening in the engine compartment of the car. You can purchase coils or ignition modules for domestic “classics”, “Samara” and “Sputniks” in our online store with a few clicks of a computer mouse.

VAZ 2110 was born back in 1996. The first models were produced with an 8-valve carburetor engine. Then the carburetor was replaced by an injector and even a 16-valve engine, which was first installed on the VAZ 2112.

Accordingly, with the advent of the injection system, many different electronic sensors appeared in the car, such as the ignition module.

In this article we will talk about the ignition modules for the VAZ 2110-12, namely its symptoms of malfunction, checking, cost and do-it-yourself replacement.

Version of the module on the 8-valve VAZ-2110

The top ten was equipped with two 8-valve engines of different sizes - 1.5 (2111) and 1.6 liters (21114). The ignition modules for these engines are different.

• The one and a half liter engine has a module with article number 2112-3705010,
• and the 1600 cc is equipped with module 2111-3705010.

A module for a 1.5 liter engine costs about 1500-2100, and the second one is 500 rubles cheaper.

Which is better?

SOATE devices manufactured in Stary Oskol have proven themselves to be the most reliable ignition modules.

Module structure

The module consists of two ignition coils and two high-voltage switch switches.

Inside the module there is a board with radio components and ignition coils filled with compound.

The coil generates a high voltage pulse, and it is a simple transformer with two windings, primary (induction voltage about 500 V) and secondary (induction voltage at least 20 kV). All this is assembled in a single housing, on which there is a connector for signal wires (from the engine control unit) and four terminals for high-voltage wires.

Schematic diagram of the module.

The module operates on the principle of an idle spark - it distributes sparks in pairs to cylinders 1-4 and 2-3 according to impulses transmitted from the ECU.

Repair

So, for the VAZ 2110 the most common problem is the disappearance of voltage on cylinders 2 and 3. After some time, the engine starts working normally again if you press the rear plate of the module.

You should not put up with such a situation; it is better to immediately check the functionality of the unit, restore or replace it completely.

Removing the module

The procedure is quite simple.

1. Disconnect the negative cable from the battery.
2. Remove the plastic cover that covers the motor.
3. Remove the wires from the spark plugs.
4. Disconnect the wires from the ignition module. Their numbering is indicated on special white rings. And the cylinder number is indicated on the ignition module housing.
5. Disconnect the connector from the ignition module.
6. Using a 10mm socket, unscrew the three nuts that hold the block we are looking for.
7. Carefully remove it, after which you can begin further work.

Now let's move directly to working with the module:

1. Open the aluminum plate on the ignition module. A flathead screwdriver is useful for this.
2. Inside you will find a small printed circuit board with electronic components. It is covered with a transparent layer of silicone, which will have to be removed.
3. There are also wires that connect the board to the connector contacts. They are made of aluminum, so they can tear quickly.
4. Tear off all the wires from the contacts, don’t be afraid. Others will be installed in their place. By the way, experts recommend using stranded wires used in computer mice.
5. The ignition module circuit includes two switches and two powerful transresistors. If you decide to change these elements, you need to know that the switches are manufactured by SGS-THOMSON (model L497D1), and the transistors are of the BU931 type.
6. The contacts are made of aluminum, so you will need a special flux to work with this metal.
7. We solder the wiring to the board. It is more difficult to solder to the transistor collectors, since they are covered with a special material, the soldering of which is problematic. Therefore, try to hide the top coating from the element as carefully as possible. To prevent the soldering iron from transferring all the heat to the plate, place it on the stove and heat it to 180 degrees Celsius.
8. Solder the wires to the contacts on the module so that they are as short as possible.
9. Cover the areas where you soldered with varnish. Regular nail polish borrowed from your wife will do.
10. Check if the ignition module is working.
11. If everything is fine, coat the inner surface with a special autosealant, then reassemble in the reverse order.
12. Upon completion of assembly, the wiring should be positioned fairly freely. Make sure that they are not compressed inside the box and that the integrity of the connections is not broken.

Carrying out such a repair of the ignition module on a VAZ 2110 with your own hands will not be difficult. But be careful, act carefully and consistently. Pay special attention to the soldering process.