VAZ 2109 Injector Connection Diagram

VAZ-2109 engine compartment wiring diagram

Cars of the VAZ family are practical vehicles, but the quality of manufacturing of individual mechanisms and systems leaves much to be desired.
In this regard, owners of such machines often encounter all sorts of malfunctions and are forced to perform preventive repairs. There are several categories of components in the design of a car that require close attention and attention. These include:

1. Brakes.
2. Steering gear.
3. VAZ-2109 engine compartment wiring and electrical network inside the cabin.

Therefore, it is important to understand that a breakdown in one of the above systems can have serious consequences for both the driver and passengers.

Vehicle handling

So, with the first two categories everything is very clear:

1. Every owner understands what a loss of car control can result in.
2. All identified breakdowns are immediately eliminated by repair or complete replacement of parts.

However, the wiring is not so simple. For some reason, everyone is accustomed to thinking that underhood wiring does not pose any danger. But this is a very big misconception.

The short circuit and ignition of live wires threatens that the car may simply burn out, explode, etc. And all this can happen both while parked and while driving.

Underhood wiring includes the following categories:

1. Ignition system wires.
2. Lighting systems, side lights.
3. Connection system for sensors and control unit.
4. Wires that are responsible for the operation of the electric motor of the radiator, washer, windows, and wiper.

If the wiring is in good condition, all current-carrying parts are insulated and qualitatively fixed in the engine compartment, taking into account all the necessary physical and temperature indicators of the internal combustion engine.

However, during vehicle operation, fastenings may deteriorate, which will entail:

1. Loose contact.
2. Destruction of insulation upon contact with hot surfaces of the engine and commutator.
3. Formation of abrasions and exposure of wire cores.
4. Oxidation of contact connections due to which the “mass” may disappear.

Most owners of the VAZ-2109, as well as other modifications of the domestic automobile industry, independently repair damage in which electrical tape is a direct participant. However, this is only a temporary solution and is not suitable for permanent operation of the machine. If there are problems with the wiring, the best way out of the situation is to completely replace it. According to the instructions, the harnesses must be laid in a corrugation, which is not the case on most machines.

Carburetor internal combustion engine

Before we talk about breakdowns of carburetors and electrical equipment, we suggest you understand the scheme by which the system works:

1. When the driver turns on the ignition, but does not start the engine, power is supplied through the high-voltage wiring harness to the motor terminals, and the indicators on the instrument panel light up.
2. Next, the starter activates the crankshaft, as well as the entire piston group. In the same way, the voltage through the high-voltage wiring harness starts the generator. The panel continues to work.
3. Then power from the device is supplied to the ignition coil, which begins to generate a pulse. The impulse arrives through the high-voltage wire harness to the distributor, the instrument panel works.
4. After this, the crankshaft of the motor begins to rotate the distributor drive. The device begins to close the contacts, thus transmitting the discharge through the same high-voltage wire harness to the carburetor spark plugs. The instrument panel continues to operate normally.

Classic ignition

If you cannot start the engine on a carburetor, you need to pay attention to diagnosing the following elements:

1. Inspect the electrical wiring between the coil and the generator. You need to check the contacts for breaks or oxidation, sometimes you can simply clean them, in some cases they require replacement. If the electrical circuit itself is in poor condition, then it may make sense to replace the wires.
2. You should also diagnose the ignition coil. First of all, you need to check for the presence of a spark. To do this, remove the high-voltage wire from the distributor harness and bring it to the metal elements of the engine compartment. When you try to start the engine by turning the ignition key, a spark should appear from the high-voltage wire. If it is not there, then the coil is faulty and needs to be repaired or replaced.
3. In addition, you need to check the distributor chain and the spark plugs themselves. If you see that the high-voltage wires in the harness are in a sad state, then it may make sense to change them. Carry out diagnostics of the internal slider, as well as the carburetor spark plugs themselves (video author - MR. Boroda).

Electronic ignition

The VAZ 2109 can be equipped with an electronic, that is, contactless switch, which is mounted between the coil itself and the distributor. The electronic system is designed to provide a better spark if the engine operates on a lean fuel mixture. If the pulse is too low or completely absent, as you were able to verify when checking for the presence of a spark, then it would be better to change the switch. If the installation of a new device does not solve the problem, it will be necessary to completely or partially change the electrical wiring. There is a possibility that the resistance level in the circuit is very high, and this contributes to a too weak spark.

Nuances of underhood wiring

There are quite a few hazards associated with wiring under the hood of a car that can affect its proper operation.
This place combines the most important systems and devices that have high physical and chemical properties:

1. An internal combustion engine is a source of excess heat that “well” heats closely located components.
2. Fuel system - explosive vapors of a mixture of air and gasoline.
3. Power parts in the form of relays, electric motors, headlight ignition units and self-installed fog lights.

Accordingly, if the condition of the wiring is in poor condition or is deteriorating gradually, it is best to replace it. Otherwise there may be problems.

Features of the engine compartment

Let's find out what is dangerous under the hood for the operation of the wiring and the consumers it connects to the electrical network.

First of all, you should realize that all the most important components and assemblies that have high physical and chemical indicators are concentrated in this enclosed space:

1. The power unit is a source of increased heating of nearby components and assemblies;
2. Power supply system – explosive vapors of the air-fuel mixture;
3. Power elements of the electrical circuit - numerous electrical connectors and connections: relays,
4. electric motors for windshield wipers and washers,
5. headlight ignition units or self-installed fog lights to improve visibility on the road.

Therefore, if the technical parameters of the wires have deteriorated, as evidenced by oxidation of contacts, delamination of insulation, numerous twists, etc., it must be replaced as quickly as possible. Of course, unless you have a Finnish VAZ 2109 wiring, which initially has better parameters.

An example of the correct installation of new wiring in the engine compartment

Tip: be sure to use the wiring diagram when working in the engine compartment. This will prevent errors from occurring. And you can learn how to use it correctly from the video offered in the article.

Every VAZ 2109 owner should have a similar diagram

Finnish wiring

This type of electrical system is installed on Samara cars, which were imported into our country from Finland.

The electrical system on this “nine” differs from the domestic model:

1. Classic ignition.
2. Contactless ignition.

The wiring diagram of a carburetor car is made in accordance with regulations and environmental requirements:

1. The wires had excellent performance characteristics in various conditions.
2. The wiring harnesses in the engine compartment and interior also differed (Li, Gl, GLi).
3. The GL designation indicates that the car is equipped with fog lights and an additional brake light.

The entire wiring diagram on the car also differed in the contactless ignition unit from the well-known company GM.

The following solutions were used in the ignition system:

1. Non-contact sensor.
2. Sensors with an ignition distributor.
3. Regular spark plugs.
4. Electronic switch.
5. Improved ignition coil.
6. Mounting block (standard).
7. Electronic ignition relay.
8. Egnition lock.

As a result, the Baltic “nine” was, is and will be the best representative of the family.
To summarize, we note that in the article we quite clearly reviewed the dangers that can be caused by problems with wiring in the engine compartment. If your car is at a “respectable age”, then we recommend immediately checking the condition of the electrical system and, if necessary, bringing it into proper condition. With this approach, you will protect yourself from many troubles and also save your car.

If you have difficulty assessing the condition and replacing the wiring, contact a specialist. This will save you a lot of time and money in case of incorrect repairs.

Ignition circuit for VAZ 2108

VAZ 2108 vehicles use a non-contact ignition system. There is no breaker in it, and the moment of sparking is controlled electronically. Below is its electrical diagram and a description of the main elements.

1. Accumulator battery. Provides electrical current when starting the engine.
2. Generator. Provides electric current when the car engine is running. In particular, it powers the ignition system.
3. Fuse and relay mounting block. Serves for switching low voltage wires, in particular the ignition system.
4. Ignition coil. Provides high voltage current to the ignition distributor.
5. Switch. Provides a pulse for sparking (opening the power circuit of the primary winding of the ignition coil) in one or another cylinder according to a signal from the Hall sensor.
6. Hall Sensor. Generates a control pulse (reducing voltage) for the switch, signaling the need for sparking in one or another engine cylinder.
7. Ignition distributor (distributor) with vacuum and centrifugal ignition timing regulators. Serves to generate a control pulse to the switch (Hall sensor), distribute high voltage pulses across the spark plugs (“slider”), correct the ignition timing in accordance with the engine operating mode (centrifugal and vacuum regulators).
8. High-voltage wires (armored wires). They serve to transmit high voltage current from the ignition coil to the distributor cover and then to the spark plugs.
9. Egnition lock. Serves to close the ignition system circuit. Through it, electric current flows into the ignition system.
10. Ignition relay. Serves to relieve the contacts of the ignition switch (lock) and supply voltage to the coil and switch.
11. Spark plug. Serve to generate a spark in the engine cylinders.

One of the most important elements of the circuit is the photoelectric Hall sensor built into the ignition distributor. With its help, the BSZ (non-contact ignition system) fixes the position of the engine camshaft and determines the moment of spark formation.

When the car engine starts and during its further operation, the Hall sensor at the right times generates electrical impulses necessary for the formation of a spark at certain times. These pulses are then sent to an electronic switch, which amplifies them and transmits them to a high-voltage coil.

Wiring – VAZ 2109 – injector: features of control sensors and ECU unit

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If the VAZ 2109 body is in good condition, then after the power unit has exhausted its service life, the owners are faced with the choice of a new engine. And since carburetor versions are no longer produced, installing an injection version will require a complete replacement of the standard electrical wiring.

For reference: in a carburetor engine, fuel was mixed with air by an air flow, and only then entered the cylinders. In the injection system, it is supplied directly to the cylinders using electronically controlled injectors.

Pump operating principle

The VAZ 2109 fuel pump has a fairly simple design; the injector functions only thanks to it. It is based on two elements - an electric motor and a pump with a filter element. Please note that the “diaper” (as people call the filter for its similarity) needs to be changed on time - try not to let it work for more than 20 thousand km. Otherwise, it becomes saturated with metal shavings, dirt and other rubbish, which gets into the line and clogs the injectors.

The fuel rail contains a mixture of gasoline and air (also purified, by the way). The proportion is always the same - 14 parts of air and one part of gasoline. This is the ideal mixture for combustion to occur. But you need to pay attention to the fact that the VAZ 2109 fuel pump relay, which is controlled by an electronic unit, is involved in the operation. It is used to supply power to the pump motor. The pump's performance is high, so the engine does not run constantly, but intermittently (and depending on the operating mode of the engine, the pauses between starts may be different).

For control, there is a pressure regulator installed on the ramp. To drain excess gasoline - a check valve. With its help, all excess gasoline flows back into the tank. The VAZ 2109 fuel pump (injector) is removed if it is being repaired or replaced. The following tools will be useful:

1. Pliers.
2. Keys for “6”, “8”.
3. Phillips and flathead screwdrivers.

But if the pump suddenly fails, you should first check the condition of other elements. Carefully inspect the fuse and relay of the VAZ 2109 fuel pump. If they are faulty, then the entire injector will not be able to work normally. As they say, we check the least expensive breakdowns first. If the reason is really in the fuel pump itself, then you can start dismantling it:

1. Raise the lower part of the seat, opening the rear doors completely.
2. Unscrew the screws securing the plastic cover.
3. Disconnect the power supply and connection to the level sensor.
4. Loosen the clamps and remove the hoses. Please note that the pressure in the system must be reduced in advance.
5. Using an “8” wrench, unscrew all the nuts that secure the pump to the tank body.
6. Carefully remove the pump from the hole.

The main thing in this matter is accuracy, as there is a risk of damaging the fuel level sensor. And one more thing: before removing the VAZ 2109 fuel pump, you need to get rid of dirt and dust. Therefore, blow the installation area with compressed air or at least clean it with a brush.

To verify the serviceability (or malfunction) of the fuel injection pump of the VAZ 2109, just remove it and connect it directly to the battery. If it works normally, without any extraneous sounds (and air pressure is felt from the outlet), then there are no problems with it. But if it does not turn on even this way, you should think about replacing it. The price of a new one will be about 2000 rubles. Is it worth repairing an electric motor? It is unlikely that this will improve the situation for a long time, but as a temporary solution it is quite normal. But you can do this procedure only if you are confident in your abilities and have an understanding of how electric motors work.

To replace the motor you will also need a new wiring kit.

For reference: in a carburetor engine, fuel was mixed with air by an air flow, and only then entered the cylinders. In the injection system, it is supplied directly to the cylinders using electronically controlled injectors.

What's under the hood

Let's remember how the new power unit differs:

1. The distributor and ignition coil, responsible for the formation of a spark in the cylinders, have been replaced by an electronic unit - an ECU;
2. The VAZ 2109 engine compartment wiring to the injector has a number of design features. In particular: more connectors, other parameters (cross section, insulation);
3. Instead of a carburetor, a block of electronically controlled injectors is installed;
4. Automation is based on the readings of many sensors that are not on carburetor engines, which means that the wiring for the VAZ 2109 injector has more components.

For reference: In injection versions, a single ignition module is installed under the hood, in which the coil and switch are combined into a common spark-forming device.

Control sensors

In order for a power unit with an injection system to work, the electronic unit needs readings of the most important parameters.

And special sensors that the motor is equipped with are responsible for this:

1. DPKV (crankshaft position sensor). One of the most important parameters, without which the car will not even start. It tells the ECU when it is necessary to inject fuel and ignite it in the cylinder;
2. MAF (mass air flow sensor). Installed after the air filter and is responsible for the quantitative composition of the air-fuel mixture;
3. DD (knock sensor). Using its readings, the ECU calculates the ignition timing - the most important parameter for the beginning of the ignition phase of the air-fuel mixture in the car cylinder;
4. TPS (throttle position sensor). Unlike a carburetor circuit, where the pedal directly controls the damper, in injection engines the pedal is not connected to the actuator;
5. IAC (idle air control). Necessary for enriching the air-fuel mixture for stable engine operation when not in motion;
6. DT (temperature sensor). Available on all engines and is responsible for controlling the coolant temperature;
7. DSA (vehicle speed sensor). Based on its readings, the ECU calculates the amount of fuel and air.

The presence of sensors also modified the electrical circuit of the car - the VAZ 2109 electrical wiring to the injector has many connectors for connecting sensors to the ECU.

In the photo above, the diagrams with sensors are indicated by numbers:

Tip: To install them in an old car body, you do not need to modify anything. The manufacturer has minimized preparatory work, and the instructions supplied with the power unit describe in detail the procedure for installing attachments.

ECU block

The electronic “brains” of a modern injection engine are the ECU unit.

It is he who is in charge of all the electrical processes of the power unit, and structurally consists of:

1. read-only memory (ROM);
2. random access memory (RAM);
3. a microprocessor that processes electronic signals coming from engine sensors.

Advice: it is unacceptable to interfere with its work, as well as to diagnose its operation parameters with your own hands.

All electronic components of the ECU are designed for very low voltage. Even an electrostatic discharge from touching it with your hand can damage them.

To avoid damage to the computer, technicians at service stations:

1. avoid touching the ECU plugs;
2. do not touch electronic components on its boards with their hands;
3. when flashing ROM settings, the pins of the microcircuit are isolated.

Types of electrical circuits

We disconnect the steering wheel, steering column trim and steering column switches.

Broken wiring Injection motor As for injection internal combustion engines with injectors, malfunctions in them, as practice shows, are usually associated with failure of the sensors or the electrics themselves. Therefore, any electronics check begins with checking this unit. And special sensors that the engine is equipped with are responsible for this: DPKV crankshaft position sensor.

The heater should be assembled in the reverse order of disassembly.

Adjust the center shutter. New clamps should be used.

See also: Power supply design

See also related news

Be sure to adjust the travel of the dampers. VAZ diagram old versions VAZ diagram new versions There is no brake pad wear sensor. Previously, the handbrake lamp blinked when the lever was raised, and lit up constantly when the sensors on the brake pads were activated. The VAZ injector, electrical diagram, includes many sensors and fuel pump regulators, their diagram is posted on the websites of car enthusiasts.

If the sensor reacts to metal, it means it is working. Adjust the center shutter. All these control and monitoring lines are assembled into one block and at the output they are connected to the nodes using connectors on the control circuits and signal sensors from the mechanisms.

What kind of problems does an electrical circuit help to solve?

Connection diagram for starter VAZ, VAZ, VAZ A - pull-in winding; B - holding winding; 1 - starter enable relay; 2 — mounting block; 3 — ignition switch; 4 - generator; 5 - battery; 6 — starter Fig. You can disconnect the alarm wiring and the backlight lamp. Modification of a car with a VAZ carburetor engine, 1.5 liters and 73.4 horsepower.

This circuit is used to identify a malfunction in the automotive mounting block. Years of production: — in Russia, — — in Ukraine. Limit switch for reverse gear lights. what is required to install the injector on a vaz

What's inside the cabin

Replacing the power unit will also require replacing the interior wiring.

Many owners combine this process with replacing the instrument panel with a modern one:

1. the “high” panel from the VAZ 21099 fits without modification;
2. The “LUX” panel from the VAZ 2114 model is suitable with minor modifications.

Tip: there are a lot of videos on the Internet that describe in detail the process of finalizing the panel. Read them all carefully before starting work on your car.

Practical advice

The operation of an injection power unit, and in particular the maintenance of its electronic components, is fundamentally different from carburetor engine systems.

Owners of converted cars must learn a few basic rules:

• Before dismantling the injection control system components, be sure to disconnect the negative cable from the battery terminal;

• Do not start the engine if the terminals of the wires on the battery have poor contact. Be sure to check how tightly they are tightened;
• Do not disconnect the battery while the vehicle engine is running. This is guaranteed to lead to failure of the ECU;
• Monitor the ECU temperature. It is not allowed to overheat (65°C when the car is running and above 80°C, for example when drying in a paint booth). If such a process is unavoidable, remove the ECU from the vehicle for the duration of the work;
• It is also necessary to remove the ECU or disconnect it from the vehicle’s on-board system when carrying out welding work on body parts.

What elements does the diagram include?

The main components of the electrical circuit in the VAZ 2108:

• ignition system, including a lock, starter, spark plugs, distributor, as well as high-voltage wires transmitting current;
• sound signal unit;
• electric windows, if the car is equipped with them;
• heating system;
• heated rear window;
• lighting, including headlights, side lights, turn signals, brake lights, interior lights, as well as fog lights, if the car is equipped with them;
• a windshield and rear window washing system, including windshield wiper blades and an electric motor;
• cooling Fan;
• dashboard, where the speedometer, tachometer, fuel and engine temperature gauges, econometric gauge, as well as all indicators are located;
• steering column switches for controlling turn signals, washer systems, and high beams;
• battery;
• generator unit.

Full diagram of the G8 equipment

In general, the electrical circuit consists of many devices, and it doesn’t matter whether we are talking about an injector or a carburetor, whether the car is equipped with a high tidy or a low panel.

The main components of any electrical system, without which engine operation is impossible, are the following:

1. Dashboard. If it fails, operation of the vehicle will be impossible. Even if the car starts, the driver will not be able to know how fast it is moving, what the engine temperature is, or how much fuel is left in the tank.
2. An ignition system that combines several components that we have already talked about.
3. The battery, thanks to which the power unit is started, also allows electrical appliances and equipment to operate when the engine is turned off.
4. The generator unit is one of the main ones, since it is it that supplies power to all electrical equipment when the motor is functioning. When the car is running, the generator also powers the battery, allowing it to replenish the energy it expended to start the engine.
5. Mounting block with fuses located in the engine compartment, under the windshield opposite the driver's seat.

1. Generator device connection diagram

2. Contactless ignition system

Wiring – VAZ 2109: interior and engine compartment modifications

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Perhaps, without exaggeration, we can say that the most popular AvtoVAZ model is the family of front-wheel drive cars. And many owners strive to change the VAZ 2109 on their own, introducing various improvements that affect the standard wiring.

But are they all justified? This will be discussed in this article.

Today you can find several modifications of the car, in which the wiring diagram for the VAZ 2109 has significant differences.

In particular, the car is equipped with:

1. Carburetor power unit;
2. Injection power unit.

In addition to the desire to change or improve something, owners of early models of this car are faced with the need to replace the engine due to the exhaustion of its service life.

What can be changed in the electrical circuit

Let's figure out what exactly car owners undergo alterations.

Moreover, we will indicate only those alterations that are not prohibited by the manufacturer and current regulations:

1. Installation of a new instrument panel;
2. Alteration of internal (interior) lighting;
3. Installation of additional turn signal indicators in the rear view mirrors;
4. Installation of additional headlights (fog lights);
5. Installation of an acoustic and multimedia system;
6. Immobilizer installation.

For reference: the visual differences between the standard panel and the “high” one are that the radio compartment is moved to the level of the dashboard. Accordingly, the wiring on the VAZ 2109 under the instrument panel must be replaced.

Interior modifications

Many owners come to mind with the desire to improve the lighting in the car interior.

Let us remind you that inside a passenger vehicle there are several places equipped with lighting sources:

1. The salon itself (interior lighting);
2. Glovebox;
3. Cigarette lighter;
4. Instrument panel (instrument cluster lamp and symbol lamp)

If you, as the owner, like a high panel in the cabin, then you cannot do without replacing the standard wiring. Because the:

1. Control devices have a different location on the panel;
2. The standard length of wires is not enough;
3. Terminal blocks may also differ.

Accordingly, without replacing the electrical wires it will not be possible to use:

1. instrumentation;
2. on/off buttons for various devices.

As for making changes to the instrument panel lighting, today there are sets of special lamps on sale along with the wiring with which they are connected to the car’s electrical network.

You can install such kits yourself; it is only important to adhere to accuracy and safety rules.

Advice: carry out all electrical wiring replacements and connecting instrumentation only with the battery disconnected.

Engine compartment modifications

In addition to replacing the power unit after it has exhausted its life, there are many components in the engine compartment whose wiring also needs to be replaced:

1. high-voltage wires from the ignition unit;
2. wiring of various control sensors;
3. battery power cables (connections are most susceptible to corrosion).

Numerous sensors in the engine compartment require special monitoring:

1. Coolant temperature sensor - if the electrical wiring is faulty, the driver will not notice overheating of the power unit;
2. Brake fluid level sensor in the expansion tank - a leak or low level can lead to brake system failure;
3. ABC system sensors - oxidation of contacts or disruption of wiring integrity can lead to system failure;
4. Exhaust gas sensor - based on its readings, the electronic unit “prepares” the fuel-air mixture. If the sensor does not work, gasoline consumption will increase.

A useful addition to the functionality of the car is the acquisition of a modern anti-theft system.

Installing a modern alarm system is a special topic, since its work affects several main components and systems of a VAZ family car:

1. General electrical system;
2. Supply system;
3. Sound and light circuit and actuators (side lights, headlights, sound signals);
4. Standard immobilizer.

Advice: often manufacturers of alarm systems accompany the installation process with video and photo materials for each specific model of a particular family of cars. Before starting installation, you should read them carefully.

General alterations

Installing additional fog lights is a general modification because:

1. Affects equipment in the engine compartment;
2. Interferes with the instrument panel inside the cabin;
3. Connects to the vehicle's standard power supply system;
4. Attached to the power body.

To install and connect fog lights, you will need a wiring diagram for the VAZ 2109, because the package includes:

1. Connecting wires;
2. Terminal blocks;
3. Switching relay;
4. Actuators (buttons);
5. A backlight lamp (or LED) indicating the status of lighting fixtures.

Device and principle of operation

First, you need to determine: what type of power supply to the engine is currently subject to discussion. After all, the carburetor and the injector have completely different devices, and each of them has its own electrical circuit. You and I will talk about the type of power supply for the VAZ 2108 engine - a carburetor.

The wiring originates from the battery. Typically, a 12 volt (6 amp) battery is installed. On its way to various appliances, electricity passes through the fuse box. Further, it stabilizes its power using a number of devices: a switch, a voltmeter and an econometer.

After this, the electrical circuit is distributed directly to the main components of the VAZ 2108 devices. Let's start with the lighting devices. These include: headlights, low beam and high beam, engine compartment lighting, taillights, turn signals, interior lighting, and license plate lighting. Each of the above elements receives a different amount of energy. For example, for high beams, the current will be more powerful than for dimensions.

As for the operation of the VAZ 2108 engine, the following devices are required: a generator, control systems responsible for the carburetor, starter, ignition coil, distributor and spark plugs. The wiring diagram transfers electricity from the ignition coil to the spark plugs. In this case, while the engine is running, the generator is turned on. The distributor is responsible for distributing the spark between the combustion chambers of the cylinders. Each cylinder has its own stroke sequence, which is determined by the engine diagram.

The control systems responsible for the carburetor must open the valves in time, helping to form the correct combustible mixture in the float chamber. They also regulate the operation of the solenoid valve.

The carburetor has a simpler wiring diagram than the injector. This is because the injector circuitry involves electrically controlling the injection and mixture formation, while the carburetor does most of this work mechanically.

Further, the electrical voltage circuit in the VAZ 2108 car includes devices designed to improve driving safety and comfort. These include: air conditioning, heater, windshield and headlight washers, radio, and horn.

Also, the VAZ 2108 car has sensors that determine the temperature and level of fluids necessary for engine operation. Each of them is also powered by a battery. Sensor indicators are displayed on the instrument panel so that the driver can see them. The dashboard of the VAZ 2108 includes 16 indicator lights, a speedometer and a tachometer.

Useful tips

The VAZ 2109 wiring diagram is necessary without any intention of making changes to the car’s structure, because during operation the wiring is subject to:

1. Temperature effects - both climate changes and daily heating and cooling cycles;
2. Mechanical loads - wiring runs throughout the entire car body, exposed to components and mechanisms, passengers and transported goods

Accordingly, the owner is required to perform a preventive inspection of the standard wiring in order to identify insulation violations and mechanical damage. Timely detection of a malfunction will allow you to quickly correct and prevent more significant failures in the operation of the vehicle’s electronic devices.

Conclusions: we hope that the issues covered in this article will protect you from thoughtless intervention in the electrical circuit of your car. And if you need to replace the standard wiring, you will do it in accordance with the manufacturer’s recommendations.

VAZ 2109 wiring under the hood: we diagnose it ourselves

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Where to start looking for the cause of an engine failure to start? Of course, from checking the engine compartment, where the bulk of the car's control systems are concentrated. And among them, wiring is far from the last place when it comes to the VAZ 2109.

Main reasons for refusal

If the engine does not want to start, but the starter rotates the crankshaft, then the main reasons are known:

1. Either the air-fuel mixture is not supplied to the cylinders;
2. Either there is no one to “ignite” this very mixture - there is no spark.

Supply system

Checking whether fuel is getting into the cylinders is quite simple. For this:

1. We take a spark plug wrench from the standard tool kit;
2. Remove the high-voltage wire from the spark plug of the first cylinder;
3. We unscrew the spark plug with our own hands;
4. We look at it carefully.

Tip: if the spark plug is wet and smells of gasoline, it means the air-fuel mixture is entering the cylinders. You should look for the reason for the refusal. If not, then you need to look for the cause in the power system components. Videos about eliminating such failures are available on the Internet.

Ignition system

The first step in troubleshooting should be to start by testing the ignition system, since quite a lot of devices take part in the sparking process:

1. Spark plug;
2. High voltage wires;
3. Ignition distributor (on carburetor engines);
4. Hall Sensor;
5. Switch;
6. Ignition coil.

Signs of trouble

There are several types of vehicle electrical wiring conditions in which VAZ 2109 owners are forced to look for breakdowns:

1. The vehicle cannot perform its primary function, that is, it cannot drive. Either the wiring diagram of the VAZ 2109 is damaged, or one of the main components of the car is not working.
2. The car can drive, but the systems sometimes start to act up or not work correctly.

If, when trying to start the engine, the driver fails, but fuel flows normally into the injector or carburetor, then most likely the problem lies in the wiring:

1. If the car runs on a carburetor, then first of all you need to check the spark plugs and high-voltage wire harness. It would not be superfluous to diagnose the distributor, as well as the ignition coil. It also makes sense to check the engine compartment wiring on carburetors.
2. When it comes to the injector, often the main cause of the problem is the electronic engine control system. If the system does not allow processing signals from sensors and subsequently cannot issue commands for additional components or mechanisms, then the problem must be looked for in it.