The ignition module VAZ-2110 is designed to supplyhigh voltage to candles. This is one of the most important elements, its failure disrupts the engine. With this device, the signal from the electronic control unit is amplified - the voltage is about 30 kV. Due to the fact that the ignition module is in the engine compartment and is constantly subjected to overheating, exposure to dust and water, it fails. The most vulnerable nodes are semiconductor elements.
Design Features
If you are familiar with automotive designssystems, you will be able to draw parallels between the high-voltage coil and the ignition module VAZ-2110. The faults of this device manifest themselves in the same way. In fact, this is a symbiosis of a high-voltage coil and switch. The design includes the following:
1. To generate high-voltage pulses required for ignition of the combustible mixture using candles, two coils are used.
2. Two-channel switch of conductor elements.
The device may fail unexpectedly.Despite the fact that the car has a self-diagnostic system, the warning lamp on the Check Engine dashboard will not light up. Usually one of the switch channels fails, this is manifested by the unstable operation of the motor, sometimes by stopping it.
Typical module failure
If there is even a little knowledge inelectronics, as well as a multimeter, you can independently diagnose and identify the problem. Checking the ignition module VAZ-2110 will take a little time, but it will save you from purchasing an expensive node. Note that sometimes there are races that disappear over time.
In the microcontroller errors will remain, thereforecan be considered using special testers. But as practice shows, at the moment when the faults do not manifest themselves, the tester cannot recognize the error codes that were previously, but then disappeared. Very often, dirt on the contacts, poor fixing of the case, lack of mass, and the presence of electrical noise are the cause of failures.
Removing the ignition module
To repair the ignition module VAZ-2110,it must be dismantled. First, check if there is a high voltage on all the leads. The most frequent breakdown is the absence of a spark in the second and third cylinders. If you slightly press down the back of the case, the engine can start to work in normal mode. But not for long. For removal you need:
1. Disconnect ground from battery.
2. Remove the decorative cover that covers the head of the unit, if there is one.
3. Remove all high-voltage wires.
4. Disconnect all wires to the ignition module. On the white ringlets indicated the numbering of all wires. On the case of the device there is a designation of numbers of cylinders.
5. Disconnect the connector from the device.
6. To unscrew three nuts of fastening of the block.
That's all, the ignition module VAZ-2110 removed, and you can begin to repair it.
How to recover
Opening the aluminum plate, you will findSmall PCB with active components. It is covered with transparent silicone. It will need to be removed, as it will prevent the repair. Pay attention to the wires that connect the board and the contacts of the connectors. They are aluminum, and this metal is destroyed much faster than copper. All these wires will need to be replaced. Some motorists who repair modules use wires that are used in mice for personal computers. But you need to work with them - they are covered with paint.
In general, the scheme of the whole module is simple, it contains:
1. Two transistors BU931 (you can use the domestic analogue KT848A, it shows itself well, and it is much cheaper).
2. Two SGS-THOMSON switches (model L497D1).
What you need to know when working with the module
Before working with the module, you mustpurchase flux for aluminum. When replacing transistors, note that it is very difficult to solder wires to the collector terminals, as they are covered with a special material. And it complicates the soldering. To facilitate your work, gently open the spraying. Try not to overheat the item. Place it on a plate of aluminum so that it takes all the heat. Otherwise, the semiconductor junction will collapse and you will spoil the expensive element.
When soldering wires pay attention toso that their length is as short as possible. All places of soldering must be varnished, it is possible even for nails. After repair, be sure to check the operation of the VAZ-2110 ignition module. If it functions in normal mode, then it is necessary to process everything inside with auto-sealant. This will ensure maximum tightness of the unit - neither water nor dust can get into it. And this device will last for many years. But if the problem lies not in contacts or power transistors, it is better to leave the idea of repair and purchase a new module - at the VAZ-2110 it costs about 1,500 rubles.
