How to install electronic ignition on UAZ 469 wiring diagram

We carry out the wiring diagram for electronic ignition on a UAZ

Classics of the domestic auto industry

Many UAZ vehicles are equipped with a contactless ignition system. It makes it possible to save fuel, reduces the amount of harmful substances in gases, and makes it much easier to start the car in winter.

The connection diagram for electronic ignition on a UAZ is not as complicated as it might seem at first glance. A person who has at least a little knowledge of technology will be able to repair and correct problems himself, if any arise.

What to buy

In fact, you don’t need to buy much, and if you have a working distributor and reel, then the list of purchases will be minimal.

So, you need to buy:

1. Hall Sensor;
2. High-voltage wires (preferably silicone);
3. Switch from VAZ 08.

Advice: If your UAZ is already many years old, then we recommend that in addition to the already indicated list, you buy a new distributor, a coil, and you will also need UAZ 31514 wiring with connectors for the switch.

For reconfiguration and operation, you will also need a new UAZ 31514 wiring diagram, which is shown in the photo below, and which you can print for convenience.

For a new ignition - a new circuit

Ignition system on UAZ 469

The ignition system for the UAZ 469 can be made not only at a service station, but also with your own hands. It consists of:

Today, contactless ignition systems are most often preferred. The most interesting thing about them is the switch.

If the crankshaft rotates at a frequency of 500 revolutions per minute, it turns out that the signal at the sensor output will change too quickly. This mode is used if you start the engine with the starter. At this time, there will be not just one spark on the candles, but many, which will make it possible to start the car easily and quickly. Ignitions on UAZ have a simple design.

Contactless ignition is more convenient to use than contact ignition.

Features of electrical equipment

The UAZ 31512 model was also modernized. Therefore, it is customary to distinguish cars by year of manufacture:

1. Until 1994;
2. After 1994.

Electrical diagram of model 31512 before 1994

They have differences due to different powertrains and the installation of a new instrument panel. When replacing components and assemblies with your own hands with new (modified) ones, you should be guided by the date when such components began to be installed on the car, and use the “correct” electrical circuit for connecting electronic components.

Photo of headlight connection diagram

In particular, differences in the head light connection diagram raise many questions.

The cost of conversion is low; it is only important not only to buy the components, but also to connect them correctly:

1. On the models of the first releases, foot switches for light were installed - P39;
2. For subsequent ones - P53;
3. The differences are in the sealed case, all other characteristics are the same.

Headlight UAZ 31512

But there are differences in the connection diagram:

1. The modified headlights are powered by a foot switch;
2. Unmodified - via the central switch;
3. For unmodified ones, both lamps are powered from each other (right from left). If the light does not light even though the lamp is working, you should check the wire between them;
4. For modified ones, each has its own wire from a source of electricity.

Installation instructions

Installing contactless ignition on the UAZ 469 is quite easy. It is easy to configure and install, and the reliability of the UAZ ignition can only please us. It works very accurately, even in the cold season, when starting the car is quite difficult.

Once a new system has been purchased, it must be installed. To install you will need:

Ignition on the UAZ 469 is done as follows:

Adjusting the ignition of a UAZ is a fairly simple task. With the engine running, you need to turn the distributor very slowly to find the position at which the engine will run smoothly and the speed will be high.

The UAZ 469 car has an ignition coil, which is also a kind of transformer that converts low voltage to high voltage. When the engine is running, current flows through an additional resistor into the primary winding of the ignition coil. It is located between the legs of the fastening brackets - in the insulator.

When the engine is started using the starter, the resistor is turned off, and the current flows into the primary winding without entering it, which makes starting the engine much easier due to the enhanced spark.

Coil device

Underwater ignition on a jeep

The UAZ 469 ignition coil has a complex design:

• screw-in terminal with high voltage;
• voltage output;
• lid;
• contact spring;
• low voltage clamp;
• gasket for sealing;
• fastening bracket;
• magnetic circuits;
• contact plate;
• primary and secondary winding;
• insulation gaskets;
• frame;
• insulator;
• iron core;
• insulating mass;
• additional resistor and its insulator;
• screw and plate for fastening the resistor.

The distributor performs the function of distributing and interrupting the ignition of the UAZ 469. It has vacuum and centrifugal regulators. The centrifugal changes the ignition angle of the UAZ depending on the frequency with which the crankshaft or camshaft rotates.

BSZ spark plugs are a very important element. With their help, the working mixture in the combustion chamber in the cylinders ignites and gives a good spark so that the car starts quickly. Most often they use A12BS spark plugs, which cannot be disassembled, so in case of a malfunction you need to have new ones in stock that can be quickly and easily replaced.

Wires for high voltage are made from PVL-1 wire. They connect the coil to the distributor, and the distributor to the spark plugs. The spark plugs are attached to the central electrode using special tips with resistors.

Ignition system UAZ 469

To start the engine of any vehicle, it is necessary that the combustible mixture ignites at the right moment in the combustion chamber. Effective operation of the piston system is achieved by correctly setting all parameters. The UAZ 469 ignition system allows you to operate the vehicle regardless of climate, temperature, humidity and other external factors.

The ignition of the UAZ 469 ensures that all elements are in good working order and flawlessly perform their assigned functions. For UAZ 469, the ignition circuit consists of the following components:

Each individual component of the electrical circuit must not allow breakdown to the car body and current leakage.

The ignition of a UAZ 469 car includes the following elements:

The ignition order of the UAZ 469 is strictly regulated; the spark occurs exactly in the specified sequence. An important point is not only the timeliness of the spark supply, but also its size. If the slightest interruption occurs, the entire chain is reconfigured.

A car battery is not designed to produce sufficient current and voltage required to ignite a combustible mixture. The charging current is only capable of spinning the engine flywheel for a short time. For stable operation of the engine, the entire ignition system of the vehicle must begin to fully function.

This important component of the machine is designed to significantly increase the power characteristics of the battery. Proper ignition, together with the battery, sends the spark plugs the sufficient volume and current required to reliably ignite the fuel mixture.

General concept

The contact ignition circuit itself is not bad, because humanity has been using it since the advent of the first car. But, of course, it is far from the capabilities of contactless ignition. Therefore, many UAZ owners, in an effort to improve the performance of the power unit, reconfigure it.

General ignition circuit for older UAZ models

And not only UAZs, but also other domestic cars, for example, the wiring of the Moskvich 2141 and a number of other brands and models are subject to alterations.

Effect of modernization

What is important is that the engine compartment and interior electrical wiring of the UAZ 31514 remains virtually unchanged, and the alteration itself is characterized by the installation of new elements under the hood.

As a result:

1. The engine begins to operate stably in all modes;
2. Improves cold starting;
3. Fuel consumption is normalized;
4. The engine power will reach the passport data.

Differences between ignition systems

The main difference between the two systems is the moment of sparking:

• In classic ignition, a slider under the distributor cover is responsible for this when it comes into contact with the output contact on the spark plug wire. In this case, the supply of a high-voltage pulse occurs with an increase. It seems to be lubricated, reducing the spark power at the spark plug electrodes.
• In contactless ignition, the switch generates a charge and releases it almost instantly upon receiving a signal from the Hall sensor. As a result, the candle produces a more powerful spark. Among domestic off-road vehicles, the Niva has a similar contactless ignition system - see the VAZ 21213 wiring diagram.

The electronic switch is often mounted in UAZ vehicles on the partition on the left side.
Please note! More powerful sparking promotes self-cleaning of the spark plug, because The fuel burns intensively, leaving no deposits.

Operating principle of the ignition system

Ensuring and maintaining timely ignition of the air-fuel mixture for the efficient functioning of the internal combustion engine is the main task of ignition. This occurs in strict accordance with the established operating order of the engine cylinders. An ignition coil 16 is connected in series to the electrical circuit along with an additional resistance 14. It is automatically closed when the engine is started by the starter.

This significantly increases the breaking current of the primary circuit. Ignition coil 16 creates high-frequency pulses in the vehicle's on-board electrical system. High voltage flashes create a breakdown of the spark gap in the spark plugs 12, screwed into the top point of each cylinder, where the working fuel mixture is compressed.

The coil consists of primary and secondary windings. The primary winding is wound on top of the secondary. Inside the coil there is a core and a ring magnetic circuit. Both of these elements are made of special electrical steel. Reliable sealing of the coil is carried out by a carbonite cover in a casing with a rubber gasket.

Rework

Actually, the work itself comes down to remaking the distributor, which will no longer have a high-voltage part - an electronic switch will generate high-voltage pulses for it . The photos below show the location of two sensors at once.

The sensors are attached to the base and the contact plate has curved edges

Pay attention to the shape of the contact plate:

• It has curved ends - the sensors are located vertically;
• Flat – the sensors are mounted horizontally.

Flat plate option
Flat plate option

Both options are working, it all depends on the design of the distributor. In the future, you only have to adjust the ignition. The instructions are simple - you must remember that sparking begins when the edge of the plate is in the center of the Hall sensor.

The order is as follows:

1. Rotate the crankshaft until the piston in the first cylinder reaches TDC;
2. Rotate the distributor body until the contact plate is in the sensor slot;
3. Carefully tighten all mounting screws to eliminate any play.
4. Start the engine.

What are the ignition systems on the UAZ 469

Contact ignition on UAZ 469

. Now it is recognized as obsolete. However, domestic manufacturers continue to use it. The system launches a pulse of a certain power. This impulse comes from the ignition distributor. The contact ignition circuit of the UAZ 469 is simple and uncomplicated. This is its advantage. The driver can fix any malfunction and make adjustments with his own hands. The prices of components are low.

Transistor or contactless ignition of UAZ 469

. Contactless ignition systems are installed on many types of vehicles. It has a number of advantages over the contact design. The spark produced by such a device is much more powerful. This occurs due to an increased level of electrical voltage in the secondary winding of the ignition coil. The transistor ignition system is equipped with an electromagnetic mechanism. It ensures stable, constant operation of the entire system, uninterruptedly transferring energy to components, parts, and mechanisms. Correctly configured ignition with an efficient internal combustion engine guarantees high power and significant fuel savings. Long-term reliable performance is ensured by compliance with the frequency of maintenance of the distributor drive. It must be lubricated and adjusted every 10,000 km. The difficulty of repair is a disadvantage of the contactless ignition system. It cannot be repaired independently, since this requires special diagnostic equipment, available only in service centers and service stations.

Electronic ignition on UAZ 469

. This type of ignition is the most technologically advanced, but at the same time expensive. Modern car models are equipped with similar devices. It has complex technology that provides not only high torque, but also a number of other engine indicators. Advantages: simple adjustment of the advance angle, no mandatory check of contacts for oxidation. In engines equipped with electronic spark protection, the fuel mixture burns 100%. Repairs must be carried out only at a service station.

Underwater ignition on UAZ 469

. This is a sealed ignition system, in which there is no fear of flooding with water, falling into deep holes, or driving in open areas during snow and rain. When the ignition is normal - contact or non-contact, 50% of the spark power is actually lost inside the distributor, between the cover and the runner. Let's find out why this happens.

There is a small gap between the electrical contacts, which are the distributor cap and the slider. To pass electrical energy through this space, most of the additional current is expended. With contact ignition, for these purposes, another part of the energy is spent on the functioning of the cam.

The underwater ignition is designed in such a way that the spark from the coil directly hits the spark plug. Carrying out this process, it does not lose its main power, except for the resistance of high-voltage wires. Here the loss of power is quite insignificant, so it can be ignored.

It is worth noting that on most foreign-made cars, a coil is placed separately on each cylinder, which is located immediately on the spark plug, and the loss is accordingly quite insignificant.

Source

Possible wiring problems

What can lead to wiring problems:

1. Broken wires or damaged insulation. In both cases, the only option is to replace the damaged section of the electrical circuit. An open circuit, as well as chafing of cables, can be caused by external factors, for example, if the wiring was laid where there are rubbing mechanisms. Before replacing the cable, it is necessary to eliminate the cause, otherwise the problem will soon occur again. Solving the problem of insulation chafing by wrapping several layers of insulating tape onto the cable is also impractical.
2. Short circuit in the system. Such a malfunction can only be determined by diagnosing the electrical circuit using a tester - a multimeter. A short circuit can also be caused by chafing of power cables.
3. Voltage surges. Such malfunctions may be caused by the use of too powerful energy consumers. Let's consider the simplest example: you installed a splitter into several sockets into the cigarette lighter socket. When the voltage consumers are turned on, a higher current charge is supplied to each socket of the cigarette lighter. The cigarette lighter socket is designed for a certain voltage, and if instead of one device two or three devices are powered, then, accordingly, the voltage passing through the socket will be several times higher. This contributes to the appearance of differences in the operation of the electrical system.
4. Failure of the safety device. If the fuse blows, it is necessary to replace the failed element. But if burnout occurs too often, then you need to check the socket in which the part is installed. Perhaps the reason lies in voltage surges, so the fuse blows prematurely. The cause of the difference must be eliminated.
5. Generator unit malfunction. Problems in its operation can be identified by reduced voltage in the on-board network, as well as dim headlights. Moreover, when the driver presses the gas pedal, the brightness of the optics increases noticeably. This usually indicates a failure of the voltage regulator or worn brushes.
6. Oxidation of contacts at the ends of wires. Due to oxidation or damaged contacts, power to electrical equipment is disrupted because charge cannot flow to the device. The problem of contact oxidation may be a consequence of exposure to moisture on the wiring. This problem can be resolved by cleaning the contacts or replacing them. You can use fine-grit sandpaper for cleaning.

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