Switch VAZ 2108: recommendations and installation conditions

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

Ignition is a key element necessary for the operation of any gasoline engine. The ignition system promptly delivers a spark to the cylinder, where the piston has already compressed the fuel mixture and ignites it. As a result, the gases expand and press on the piston. Further, the movement is transmitted to the connecting rod, which, in turn, rotates the crankshaft.

Ignition VAZ 2108

The ignition setting on the "eight" depends on the preferred fuel and engine (2108, 21081 or 21083). The ignition for each motor is set accordingly with a certain advance angle.

To set the ignition you need:

• Tachometer.
• Strobe.
• Key to 10.

But, as practice shows, intermittent or untimely spark supply can be caused not only by inaccurate ignition settings. Causes include broken spark plugs, insufficient compression, a blown ignition coil, a faulty switch.

The VAZ 2108 switch is an element of the ignition system that is responsible for supplying control pulses to the coil andoptimization of spark efficiency. The quality of the impulse supply is determined in special conditions. After VAZ engineers installed a two-channel switch in the ignition system, the operation of the engine changed for the better:

• A more powerful spark has appeared.
• Idling is more stable.
• Starting the engine in cold weather has become more efficient.
• Reduced fuel consumption.
• Disappeared loss of spark power in the trampler.

Faulty ignition

Finding and fixing all problems is quite simple. You can check the candle in a painfully simple way, if there is no necessary device. They do it this way: with the engine running, the armored wires are removed from each cylinder in turn. If the armored wire is removed, and this did not affect the operation of the engine, it becomes clear that the reason lies precisely in this candle.

Checking the coil is a bit tricky. You will need to borrow the same spare part, but 100% working. If after replacing the coil the problem disappeared, then it was the coil that was faulty.

You can check the presence or absence of a pulse using a test lamp. It often happens that malfunctions in the ignition system occur during a trip. And the car owner will not always have a spare switch on the VAZ 2108, an ignition coil, a set of candles, and so on. In this situation, you can ask for help from passers-by or contact the services of a tow truck. The cost of the last service will certainly not please the driver.

To get out of this situation and go further on your own, you must first find outreason for the malfunction. Checking the switch is carried out in different ways. But many methods require special instruments and equipment.

Troubleshooting Methods

You can check the switch on the road. Disconnect the wire that comes from pin 1 and connect a light bulb (12 volts) to the gap. When you turn the crankshaft, the light should light up periodically. This means that the VAZ 2108 switch is working.

You can check it differently: disconnect the wire from the distributor and insert a regular paper clip into the central contact. Connect the latter for a short time (1 second) to the distributor housing. Put a high-voltage armored wire from the ignition coil on the main brake cylinder with a contact gap of 1 centimeter.

After these simple operations with the ignition on, a spark should appear. If the latter appears, the switch is working.

For motorists who do not understand electronics at all, it is easier to replace a faulty part. It is not at all difficult to take a known-good element and include it in the system. The deduction method can be used to find a fault. As practice shows, the coil fails least of all, after it the distributor, then the candles and the switch.

VAZ 2108 switch wiring diagram

The VAZ 2108 switch has 7 numbered contacts. Each of them performs a specific function and is connected to a separate element. Namely:

1. To the ignition coil.
2. To the electronic switch (on the case).
3. Kignition switch contact.
4. To the battery.
5. To Hall sensor.
6. To the ignition distributor.
7. Used for control signal in electronic tachometers and control instruments.

In general, connecting the VAZ 2108 switch is a simple process even for an inexperienced car owner. There should be no problems during the standard replacement or installation of this part. In extreme cases, everyone can take the help of a specialist or literature on the repair and operation of a VAZ car of the desired model. The connection diagram of the VAZ 2108 switch has no particular difficulties.

About the main thing

Whatever one may say, VAZ is a car created without any modern and innovative technologies. Repair of such a car in 80% of cases is carried out by the owner himself.

No exception - the repair of the ignition system of this car. The VAZ 2108 switch is the most vulnerable part in this system. Experienced craftsmen know that a switch from some models of Audi, Volkswagen and other car brands is suitable for the G8.

A foreign manufacturer's part shows a longer life without loss in impulse supply and spark production.