One of the important elements of the ignition system necessary for igniting the working combustible mixture in the internal combustion engine of a car is the ignition module (ignition coil). The VAZ 2110 ignition coil converts low-voltage voltage into high-voltage, which creates a spark on the spark plugs.
It is quite obvious that if a malfunction occurs in the ignition, first of all the spark plugs, wires, caps, and then the ignition coil itself are checked for functionality.
In other words, you need to know how to test module 2110 (ignition coil). Next, we will look in more detail at what it is and how to check the ignition module, what malfunctions occur and how to fix them.
We check the ignition module on the injection VAZ-2110 8 valves with our own hands
At different times, different engines were installed on the VAZ-2110 car, both carburetor and injection. However, regardless of the type of power system and the number of valves (8 or 16), all engines are assembled on the unit base of the old engine 21083 and 21093. The most progressive of these engines is the 16-valve 1.6-liter VAZ 21124 engine with a power of 89 horsepower. Today we will touch on the ignition module for 8-valve engines 2111 and 21114 (1.6 l), check its performance and find a suitable replacement for the failed module.
Design
Disassembled module
Structurally, the ignition module includes two main elements:
- 2 ignition coils that generate high-voltage pulses directed to the spark plugs;
- Dual channel switch.
The reasons for failure can be different, ranging from interruptions in the operation of the engine, ending with an unexpected stop of the power unit. Please note that the "Check Engine" light does not turn on.
Version of the module on the 8-valve VAZ-2110
Ignition module 2111-3705010 (Stary Oskol).
Ignition module 2112-3705010 for a one and a half liter engine.
The top ten was equipped with two 8-valve engines of different sizes - 1.5 (2111) and 1.6 liters (21114). The ignition modules for these engines are different.
- The one and a half liter engine has a module with article number 2112-3705010,
- and the 1600 cc engine is equipped with module 2111-3705010.
A module for a 1.5 liter engine costs about 1500-2100, and the second one is 500 rubles cheaper.
Ignition coil device
It is known that on 8-valve engines an ignition module was used (module repair, diagnostics) with two channels and coils that are capable of transmitting a spark to a pair of spark plugs at once. However, on a 16-valve engine, the coils became individual for each spark plug.
Prices and articles
The ignition coil from the Russian manufacturer SOATE for the VAZ-2112 has article number 2112-3705010-12 and costs around 1,000 rubles . Analogs from Bosch can cost twice as much, but the quality of these parts is much higher. In any case, the choice is always yours.
Ignition coil from Bosch.
Which is better?
SOATE devices manufactured in Stary Oskol have proven themselves to be the most reliable ignition modules.
Module structure
The module consists of two ignition coils and two high-voltage switch switches.
Inside the module there is a board with radio components and ignition coils filled with compound.
The coil generates a high voltage pulse, and it is a simple transformer with two windings, primary (induction voltage about 500 V) and secondary (induction voltage at least 20 kV). All this is assembled in a single housing, on which there is a connector for signal wires (from the engine control unit) and four terminals for high-voltage wires.
Schematic diagram of the module.
The module operates on the principle of an idle spark - it distributes sparks in pairs to cylinders 1-4 and 2-3 according to impulses transmitted from the ECU.
Removing and replacing the ignition coil
In order to replace the module (ignition coil) on a VAZ 2112, you must perform the following steps:
- Before starting work, be sure to disconnect the battery by disconnecting the “-” terminal from it. (How to de-energize a battery.
- Then, approaching the ignition coil, disconnect one single high-voltage wire from its central part.
- Next, use a wrench to remove the two side nuts that hold the ends of the wires in place on the side of the coil.
- Next, when the nuts are unscrewed, remove both side wires from the coil.
- And to complete the operation, unscrew the two side nuts securing the ignition coil itself to the bracket.
- And then remove the coil from the car engine.
Signs
- If one of the module coils completely fails, then two cylinders do not work. This is clearly visible even to the naked eye - the engine is feverish at idle, starting is difficult, fuel consumption is sky-high, loss of dynamics.
- To eliminate all other components of the ignition system, make sure that the spark plugs are in working order. To do this, unscrew them and check the spark on each of the spark plugs by cranking the engine with the starter and placing the spark plug with the high-voltage wire on the head so that the body (threaded part) of the spark plug touches the engine mass. If there is no spark or it is weak, replace the spark plug with one that is known to work.
- If this does not lead to anything, check the high-voltage wires. Thus, we will exclude spark plugs, caps and high-voltage wires from the list of non-working elements. Next we will check the ignition module.
Breakdown of the spark plug insulator.
Dirty spark plug electrodes.
Filled candles.
How to check the ignition module?
- First of all, we carefully inspect the module body. There should be no chips, burns or cracks on its surface. A module with a damaged casing is replaced without any hassle.
- If the spark is unstable only on cylinders 1-4 or 2-3, one of the module coils is probably damaged. In any case, we will conduct a comprehensive check of the device. For this we will need a regular multimeter.
Multimeter for checking the ignition module.
Lada Samara, 2113-2115
On carburetor models of VAZ cars of the Samara family (2113-2115), ignition coils 2111.3705 (analogous to Bosch F000 ZS0 211) are installed. These coils have a 3-pin connector and are used for VAZ cars with a microprocessor internal combustion engine control system based on the M7.9.7 controller or its analogues with 8-cl. engines.
Diagnostic procedure
The diagnostic procedure can be as follows:
- Disconnect the connector with signal wires from the module.
Remove the connector from the module by moving the lock slightly and pulling the wire.
- Turn on the ignition and check the voltage at terminal 15 (central) of the control wire block. The rated voltage is 12 V. A drop or absence of voltage when the battery is charged indicates that the engine control unit does not supply power to the module. This means the reason lies in the ECU.
We check the voltage between pin 15 and the block ground.
- We remove the high-voltage wires, unscrew the module mounting bots and remove it.
Using a 13mm wrench, unscrew the bolts attaching to the cylinder block.
Unscrew the bolts securing the clutch housing.
Remove the module along with the bracket.
- We check the resistance of the primary windings of the coils - put the multimeter in resistance measurement mode and take readings from the rightmost and central terminals, then from the leftmost and central terminals. The nominal resistance of the primary windings is approximately 0.5 Ohm.
Scheme for checking the primary windings.
We measure the resistance of the secondary windings between terminals 1-4 and 2-3 high-voltage wires. Nominal value: 5.4 kOhm. If the readings do not correspond to the nominal value, the coil is not working correctly.
Scheme for checking secondary windings.
Check the module for a short circuit. To do this, install one tester probe on the central pin 15, the second on the metal body. The device should show the absence of a short circuit (one or infinity). Otherwise, one of the coils has shorted to the housing.
Scheme for checking the module for short circuit.
Purpose and design of the ignition coil of the VAZ 2112
To create a pulse (spark) between the electrodes of the spark plug of the VAZ 2112 carburetor engine, a “standard”, classic or case coil was used for a non-contact ignition system (BSI), which is a high-voltage pulse step-up transformer with an open or closed magnetic circuit. Its use on “two-wheelers” continued until it was replaced by a two-spark (four-terminal) ignition coil (module) for 8-valve injection engines and an individual coil for power units with 16 valves.
New ignition coil for VAZ 2112
Diagnostics of malfunctions of the VAZ 2112 housing ignition coil for BSZ, nomenclature number 3122.3705 or 8352.12, consists of measuring the resistance of its primary and secondary windings and comparing the obtained data with table values. The resistance of the primary winding of coil 3122.3705 should be 0.43 (±0.04) Ohm, the secondary winding - 4.08 (±0.4) kOhm. The resistance of the coil 8352.12 is respectively 0.42 (±0.05) Ohm and 5 (±1) kOhm. The insulation resistance to ground must be at least 50 MOhm.
If measurement results differ by more than tolerance values, the coil must be replaced. You need the VAZ 2112 ignition coil, with its relatively low price, it is quite reliable and its replacement is rather an exception to the rule.
Ignition module VAZ 2112
The ignition module (four-terminal coil) provides simultaneous sparking in two cylinders (the first and fourth or the second and third). It needs to be checked for serviceability if there is no spark on one or more spark plugs. It is checked using a stand that simulates various engine operating modes and an oscilloscope. Checking “in the field” consists of connecting a known working spark plug one by one to the tips of high-voltage wires, grounding it to ground and, turning the crankshaft with the starter, visually detecting spark formation on the electrodes of the “test” spark plug.
Errors
A module malfunction can also be determined using an error scanner. Error codes associated with the module are:
- R-3000, R-3001, R-3002, R-3003 and R-3004 - gaps in sparking, the module itself, spark plugs, high-voltage wires or the ECU may be to blame;
- R-0351 - the coil of cylinders 1-4 does not work;
- R-0352 - the coil of 2-3 cylinders does not work.
The scanner readings do not yet indicate problems with the module itself.
It is possible that the spark plugs are not working or the high-voltage wires are broken, but if we initially diagnosed them, then the fault lies entirely with the ignition module. In this case, we can repair it ourselves, or buy a new one, which is faster, easier and guarantees uninterrupted operation of the ignition system. Good luck to everyone, strong spark and good roads!
Diagnostics of the ignition system dozens
Diagnostics of the VAZ 2110 ignition system is not difficult if you have basic electrical knowledge. The presence of problems may be indicated by periodic engine stops, unexpected malfunctions in its operation, or lack of light in the indicator lamp. Also, when considering the ignition circuit, it is worth making sure that other engine systems and mechanisms are in good working order.
Many problems in its operation can be diagnosed with a digital multimeter. The controller indicating any faults is checked using a tester. When the instrument readings are normal, you should look for another reason for poor engine performance. This may be contamination of the contacts due to their oxidation, electrical interference, or insufficient contact in the connection due to unreliable fastening of the “minus”.
Often, malfunctions in the ignition of the VAZ 2110 occur for a short time and go away on their own. If voltage is lost to one or more cylinders, the engine can be restored to normal operation by applying pressure to the back plate inside the ignition module. The indicator lamp may not respond to such short-term failures, but the controller must record them in its memory.
