Ignition module VAZ 2115 injector 8 valves

Possible reasons for failure of the ignition module

Before repairing the main part in the car’s ignition system, you need to understand the nature of the problem. To do this, the consumer must be aware of the signs of a malfunction, as well as the causes of the breakdown.

The main reasons for device failure

Causes of problems:

The ignition system uses spark plugs that do not match the vehicle parameters. They may not have the gap specified by the manufacturer. Also, the spark plugs themselves may not be working or dirty; this can be determined by visual diagnostics. If there are traces of carbon deposits on the devices, they must be removed.
Malfunctions in the operation of the MH can arise as a result of frequent spark checks. At the time of diagnosis, a high load is placed on the device. If it appears frequently, it will lead to equipment failure or incorrect operation.
The ignition module in the VAZ 2114 operates with the high-voltage cables disconnected. This also leads to device failure. The products themselves may be damaged, which affects the functioning of the engine as a whole.
The device operates under severe vibration conditions. Their impact may be due to poor quality fixation of the module in the seat. As a result of vibrations, the factory soldering inside the equipment structure is damaged. This leads to its incorrect operation.
The contact inside the plug with the low-voltage cables is broken.
Initial use of a defective device or module with poor build quality. This factory defect can only be eliminated by replacing the mechanism; repairing the equipment is pointless.
Moisture getting inside the case. This problem is unlikely, but exposure of the device to liquid may cause it to short out and break.

Signs of coil malfunction

The main symptoms of a malfunction in the VAZ 2114 ignition module:

Difficulties arise when trying to start the engine. Starting the car engine may be difficult due to the fact that there is no spark on a spark plug or several.
When idling or parking with the internal combustion engine running, the speed of the power unit floats. Their change is not associated with pressing the gas pedal and other third-party factors. This happens randomly.
There are dips in the power of the car's engine. This is especially felt when driving uphill or sharp acceleration. Problems can also occur when driving on a flat road.
Several cylinders stopped working. Usually these devices operate in pairs, so elements 1-4 or 2-3 could fail. Non-working cylinders may be indicated by “triple movement” of the engine.
A “Check Engine” warning light appeared on the dashboard.

If the ignition module malfunctions, problems will appear not only in engine operation, but also when starting it.

The “Simple Opinion” channel, using the Lada Priora car as an example, spoke in detail about the symptoms that appear in the operation of the ignition modules.

Signs of a malfunctioning ignition module

Checking the ignition module with a removed spark plug

A malfunction of the ignition module is determined by the following symptoms:

Difficulty starting a cold engine due to lack of spark on one or more spark plugs.
Floating engine speed at idle is a situation in which the speed changes without any action on the part of the driver.
Dips in power, which manifests itself during acceleration and driving up a long climb.
Decrease in engine power.
Cylinders 1-4 or 2-3 do not work (engine “troits”).
Indication of the “Check Engine” indicator.

How to check the malfunction of the VAZ 2114 ignition module on your own?

The easiest way to check the device without removing it is to diagnose it at the moment the power unit is tripped. When the motor begins to operate unstably, it is necessary to disconnect the connector elements from each component of the module one by one. If the connector is disconnected from a functioning device, the operation of the engine will change. Dips will appear, and the unstable operation of the unit will increase. When the non-working element of the MH is disconnected, the motor will operate in the same way.

There is another simple diagnostic method, its principle is as follows:

You will need an assistant to check. The spark plug is removed from the seat. The high-voltage cable is disconnected from the device.
Then the disconnected wire is connected to a spark plug, which is applied to the body of the power unit.
The machine motor is starting, you need to make sure that a spark hits the spark plug. If it passes, a blue light will appear between the device and the surface of the power unit, its formation is accompanied by a crackling sound. If there is no spark, then the spark plugs, high-voltage cable and module must be diagnosed.

VAZ 2115 ignition module, description and malfunctions

The module's task is to generate high-voltage pulses on the engine spark plugs. As a result of compression of the air-fuel mixture, one spark plug is supplied with a working spark, and the second spark is supplied with an idle spark (exhaust stroke).

The “working” spark plug is connected to the first and fourth cylinders of the engine, and the “idle” spark plug is connected to the second and third. Thanks to this connection, the resulting spark synchronously jumps through the cylinders of the car.

What the module consists of, or so to speak, the composition of the device - two electronic control units, two high-voltage transformers, four outputs for high-voltage wires and a small plastic case. The weight of the device is no more than 1.32 kg, dimensions 110x117x70 mm.

The module is connected to the spark plugs using high-voltage wires that supply sparks to the spark plugs.

Control is carried out using a controller that processes all data on the operation of the vehicle, reading information from sensors, and establishing the sequence by which the ignition coils in the module are fired.

To ensure high accuracy of ignition control, the controller uses information about the crankshaft rotation speed; about the load on the engine /air consumption/; about the temperature of the liquid that is used to cool the engine of your iron horse; about the position of the crankshaft and the presence of detonation.

The ignition module remains operational at air temperatures from -40 degrees Celsius to + 130.

If there is a malfunction, the device cannot be disassembled or repaired. Such a module must be replaced, which is easy to do on your own without involving specialists.

Possible malfunctions of the ignition module:

Power reduction;
Unstable engine operation during acceleration;
Paired cylinders /1-4 and 2-3/ do not work;
Intermittent idle.

If such malfunctions are detected, you must first check the reliability of the connection of the high-voltage wires and the serviceability of the spark plugs.

With the engine running, the check must be carried out, observing safety precautions: either work with rubber gloves, or the handles of the pliers must be insulated.

If everything works fine, then the ignition module should be replaced. It is located under the hood of the car and its location is easy to find by thickened high-voltage wires.

You will need tools: socket wrench “10” /head/, wrenches “13” and “17”, hexagon.

The procedure for removing a faulty ignition module:

Disconnect the negative terminal from the battery;
Pull out the wire block from the ignition module;
Disconnect the high-voltage wires;
Unscrew the fastenings to the engine;
Pull out the ignition module by unscrewing it from the holder with a hexagon.

In order to install a new ignition module, you must first insert the high voltage wires, following the prompts on the module body.

On the terminals of the wires themselves there are also designations of the engine cylinder numbers. Then you should carry out the described steps strictly in reverse order. After starting the engine, you need to check that the ignition module is installed correctly.

Owners of VAZ 2109 - 2115 cars who cannot independently monitor the technical condition of their cars can, of course, be serviced at a service station, where they will be offered diagnostics and high-quality repairs of the car’s engine. Here, as they say, to each his own.

For what malfunctions is it possible to repair the device?

Due to the fact that the ignition module by design includes a connection of two coils, it is difficult to repair. If there is a break or breakdown, as well as melting of the turns, the problem can be solved by replacing the device. This applies to any damage that appears inside the coils. The only option to correct the situation without replacing the device is to repair the damage to the solder joint.

Ignition module repair process

The repair procedure is carried out after preparing all tools and materials:

a set of socket wrenches, you will need a tool for 10, 13 and 17;
hexagon 5;
flat head screwdriver;
soldering iron with aluminum and flux;
nail polish;
multi-core conductors.

Restoring the ignition module operation is done as follows:

The key is installed in the switch. The engine starts. Then you need to move the contact elements on the module to make sure they are not working.
The power unit stops. The module is being removed.
The device body is cleaned from dust. To disassemble, you need to open the case; this is done by prying it off with a screwdriver. Inside the device there is a board on which there is a silicone film; you need to get rid of it.
Aluminum is removed from high-voltage contact elements. Old wires are removed.
The next step will be soldering new conductors to the circuit. To do this, the surface of the collector device is cleaned from traces of plaque. Then the board must be installed on an electric stove and heated to approximately 200 degrees. As the temperature increases, a slight burning smell may be heard. This is not a problem for the circuit; heating it will simplify the soldering procedure.
Then soldering is done. Using a soldering iron, flux and aluminum, the ends of the conductors must be connected to the ignition module. All contact elements of the conductors that are connected to the circuit must be treated with nail polish.
Then the device is assembled in the reverse order and installed in the seat. After installation, the power unit starts up. If the repair solves the problem, then using a sealant, the device is fixed in place.
If a transistor or switching device fails, then these components cannot be repaired, but they can be replaced. To do this, the parts are removed from the board and replaced with new ones.

How to replace the ignition module on a VAZ 2113-VAZ 2115?

Removal: 1) First disconnect the “-” terminal from the battery, thereby de-energizing it. (How to remove the minus terminal in order to de-energize the battery, see the article: “Replacing the battery”).

2) Then find the location of the ignition module in the engine, and after finding it, disconnect the four high-voltage wires that are connected to it.

3) Next, disconnect the wire block by squeezing the retaining clip that secures it to the module.

4) Next, remove the three nuts that secure this module to the bracket.

Note! To make it easier for you to visually determine, look at the photo below, which shows the places where three nuts secure the module to the bracket!

5) Then remove the module from the three long pins that are present on the bracket.

Installation: The ignition module is installed in the reverse order of removal, but when installing it back, you must know two things:

1. After the ignition module is installed, look at its surface, you see the numbers shown there: 1, 2, 3, 4. So, these numbers indicate the numbers of the corresponding cylinders.

2. Have you noticed that the same numbers are present at the tips of the high-voltage wires: 1, 2, 3, 4. All this was done to make it easier for you to determine which of the high-voltage wires should be connected to the module where.

Note! When reinstalling the module, connect all high-voltage wires strictly by numbers, for example: “the first wire - to the first terminal”, “the second wire - to the second terminal”, etc.

Replacing the ignition module of a VAZ 2114

If repairing the MZ VAZ 2114 is impractical or impossible, then the problem with the operation of the device can be solved by replacing it.

The equipment needs to be changed only when the battery is disconnected. Otherwise, there is a risk of short circuits and failure of other electrical appliances.

How to remove the ignition module of a VAZ 2114?

The dismantling procedure is performed as follows:

First, the on-board network is de-energized; to do this, loosen the negative clamp on the battery with a wrench.
Then a search for MH is performed in the engine compartment. You can find the device by four high-voltage wires that go from the spark plugs directly to the equipment. These cables are disconnected from the MH.
Then the connector with conductors is disconnected from the device. It is necessary to disconnect the fixing fastener located on the ignition module housing.
The MZ itself is secured to the bracket thanks to three nuts. You need to unscrew them using a key.
After dismantling the fasteners, the device located on three studs is removed.

Connecting a new device

The equipment installation procedure is performed in reverse order; during installation, the following nuances must be taken into account:

After installing the ignition module, you need to look at its surface. It is marked with numbers - 1, 2, 3 and 4. These symbols indicate the numbers of the cylinders to which the MZ should be connected.
To properly connect the device, you need to look at the ends of the high-voltage cables. They are also marked with the same numbers. This is done in order to simplify the procedure for connecting the MH to the cables.

Connection diagram

The device must be connected in accordance with the diagram given in this section.

Connection diagram for MZ on VAZ 2114

How to check the device after connection?

Diagnostics of the operation of the new VAZ 2114 ignition module can only be performed using a special device - a high-voltage arrester.

You can find it in almost any auto store. Using the equipment, you can diagnose the module, as well as high-voltage cables, for the presence of a spark. To check, you need to connect the device to the device and use its operating instructions.

Ignition module VAZ 2115 - check, malfunctions and replacement

To begin with, I would like to note that the ignition module on the VAZ 2115 is a fundamentally new device that is more reliable than what was installed on earlier models of VAZ cars. The essence of the operation of this device is that it produces a high voltage electric current, which is subsequently transmitted to the spark plugs of the vehicle’s ignition system.

Operating principle of the ignition module

As mentioned earlier, the main task of the ignition module is that it generates a high level of voltage, which is subsequently transmitted to the spark plugs. The generated current undergoes a compression procedure, as a result of which a working spark is supplied to one of the spark plugs of the ignition system, and an “idle” spark is supplied to the second. To be more correct in statements, the working spark is supplied to the first and fourth spark plugs of the vehicle’s ignition system, and the “idle” spark is supplied to the second and third. Thanks to this high-voltage electric current supply system, the spark appears at the right stroke and on the right cylinder, which ensures stable operation of the system.

Power to the VAZ 2115 ignition module is supplied directly from the vehicle’s on-board electrical network. The voltage supplied to the ignition module is twelve volts. At the same time, you should know that the negative wire of the ignition module is attached directly to the vehicle body. Design of the VAZ 2115 ignition module

The vehicle ignition module consists of a housing made of plastic, a pair of electronic control units, a pair of high-voltage current transformers, and four outputs for BB-type wires. Dimensions of the VAZ 2115 ignition module: one hundred ten by one hundred seventeen by seventy. The weight of the ignition module is one kilogram, three hundred and twenty grams.

Operating principle of the ignition module

The supply of electric current is carried out using wires of the BB type; the supply of electric current is controlled using a special controller, which makes decisions based on information that comes to it from various sensors of the vehicle. Also, the controller’s tasks include setting the sequence in which the ignition coil operates.

The ignition module can carry out its uninterrupted operation at temperatures from minus forty degrees to plus one hundred and thirty degrees Celsius.

What are the signs that indicate a faulty ignition module?

There are several typical signs that directly indicate problems with the ignition module:

1. The engine idle is floating. 2. Engine thrust periodically disappears for no reason. 3. The car picks up engine speed very slowly when accelerating. 4. The cylinders stop working in pairs.

Note that the same signs indicate a malfunction of the BB wires and spark plugs of the vehicle’s ignition system, so in the beginning, you should check them, and if everything is fine with them, then replace the ignition module.

Tools you will need:

To replace the ignition module on a VAZ 2115 car, you will need very few tools:

1. Open-end wrenches for seventeen and thirteen. 2. Ten socket wrench. 3. Hexagon.

Replacing the ignition module on a VAZ 2115 with your own hands

To independently replace the ignition module on a VAZ 2115, you should strictly adhere to a certain sequence of actions, which you can find below:

1. First, you must find the ignition module itself in the engine compartment. This can be done by following the high-voltage wires that come from the spark plugs of the ignition system.

2. Next, you must disconnect the negative cable from the battery.

3. Now, you need to remove the block to which the wires are connected from the ignition module.

4. Next, you should disconnect the high-voltage wires.

5. Now, you can unscrew the mounting bolts that secure the ignition module to the engine and remove it.

6. Then all you have to do is mount the new ignition module and assemble the entire structure in reverse order.

What should I do if the problem remains after replacing the module?

If, after performing the repair, problems in the operation of the MH remain, then there is a possibility that the cause of the problem was not in the module. It is necessary to diagnose the remaining elements of the ignition system.

Spark plugs and ignition system

Features of checking spark plugs and other components:

Before dismantling the devices, it is necessary to disconnect the ends of the high-voltage cables. Their condition is checked for damage. Defects in the tips often lead to malfunctions in the spark plugs. If there is damage, the wires are replaced. It is also necessary to assess the condition of the “high-voltage workers” themselves. They are not allowed to have any defects or damage to the insulation.
After disconnecting the tips, the spark plugs are dismantled and a special spark plug wrench is used to unscrew them.
After dismantling, the condition of the devices is assessed. The color of the parts must be brown; carbon deposits and soot on the electrodes are not allowed. If there are uncharacteristic marks, the devices are cleaned using a metal brush or fine-grained sandpaper. For a better effect, the electrodes of the candles can be heated on the stove.
The condition of the gap between the part and the electrode element is checked. If it is too large, this indicates that the device is not working correctly. The spark plugs will need to be replaced.

Examination

Checking the VAZ 2114 ignition module is carried out as follows.

First of all, you need to check the block of wires that go to it. To do this, disconnect the block of wires, take a tester and connect one of its probes to the block, and connect the other to engine ground. Now look at the tester readings: the voltage should be around 12V. If there is no voltage, then you need to check the fuse. Then take a 12V test light and connect it to pins A and B. Turn on the starter and watch: the lamp should blink, if it doesn’t blink, therefore, there is an open circuit on pin A. Perform a similar operation with pin B. So, how to check the ignition module VAZ 2114, 2115 (8 valve injector)? Today there are several verification methods. 1) The first method is to replace the unit with a known working one. Everything is simple here: take it from the donor car and replace it. But there are certain disadvantages here: - there may not be a donor car, buying a new unit does not suit our task - it will not fit any car. Not everything is so simple here: old Samaras with a 1.5 liter engine are equipped with an ignition module. New cars are often equipped with ignition coils. In them, the switch is located in the ECU - therefore, the module is eliminated as unnecessary, leaving only the coil. — you need to make sure that the high-voltage wires are in good condition, otherwise there is a possibility that the unit will burn out. 2) The second method is the method of moving the unit. If at the moment of your impact the engine operation changes, then the problem is poor contact. This malfunction is common, so you can try to repair the unit yourself. If it cannot be repaired, then it must be replaced with a new one. 3) To check you need a tester. Using a tester, measure the resistance at the paired terminals between cylinders 2 and 3, as well as between cylinders 1 and 4. The resistance should vary around 5.4 kOhm and be the same.

The 2111 (1.5i) engine may have an ignition module or an ignition coil installed. The 11183 (1.6i) engine is equipped with ignition coils.

To perform the work of replacing the ignition coil, you will need a multimeter.

How to check the ignition coil?

Before diagnosing the ignition coil (SC) on an 8-valve engine, you should check whether there is voltage on the coil. To do this, you need to disconnect the wire block and check it with a tester. The voltage should be 12V.

VAZ short circuit diagram

Typical unit malfunctions

Signs of a faulty short circuit in VAZ engines with 8 valves, UAZs and other cars are similar:

power is lost, it seems that the engine does not pull;
the appearance of failures in engine operation;
unstable operation at idle;
Cylinders 2-3 and 1-4 do not function in pairs, there is no spark.

If the listed symptoms appear, you first need to check the spark plugs and crankshaft position sensor. Fuel injection into the injectors is regulated based on sensor readings, so if there is excessive fuel consumption, they require checking. The short circuit should be checked last.

You can check the ignition module (IM) on an 8-valve engine in one of three ways:

The easiest way is to replace the module being tested with a known-good device. True, you need to find a suitable module. Before checking, be sure to make sure that the high-voltage wires are in good condition.
The second method is to move the module. If, when you move it and the wire block, changes in the operation of the motor are noticeable, then there is a problem with the contacts. In this case, you can do the repair yourself. If repair is not possible, the device should be replaced.
The third method is to check using a multimeter set to ohmmeter mode. It is necessary to measure resistance at the paired terminals of coils 2-3 and 1-4. It should be the same and be about 5.4 kOhm.

Withdrawal procedure

Release the lock and disconnect the wires from the ignition coil terminals.
Turn on the ignition and use a voltmeter to measure the voltage between terminal 15 and ground in the case of an ignition coil or between terminals C and D in the case of an ignition module on the wiring harness block. The voltage must be at least 12 volts. If there is no voltage or it is less than needed, then you need to check the charge of the battery, computer or power circuit. To check the ignition coil, you can replace it with a known good one.
After taking measurements, turn off the ignition.
Disconnect the high-voltage wires from the spark plugs.
Using a 13mm wrench, unscrew the 2 bolts of the upper mounting of the coil bracket.
Using a 17mm wrench, loosen the lower mounting bolt of the bracket and remove it together with the coil.
Disconnect the high-voltage wires from the ignition coil
Using a multimeter in ohmmeter mode, we measure the resistance between the central terminal 15 and the housing. The multimeter should show that there is no short circuit of the primary winding of the coil to ground. We sequentially measure the electrical resistance between the central terminal 15 and the outer terminals - 1a and 1b. The resistance of each of the primary windings of the coil should be about 0.5 ohms. When taking measurements, you need to take into account the device's own resistance.
Using an ohmmeter, we measure the resistance between the high-voltage terminals of the coil 1 and 4, and then 2 and 3. The resistance of the windings should be about 5.4 kOhm.
Using a 5mm hex wrench, unscrew the 4 screws securing the coil to the bracket and remove the coil.