The coil performs the main function in the ignition system, which ensures sparking of the spark plugs and stable operation of the engine. Therefore, in case of the slightest malfunction, you need to urgently fix the problem.

The correct operation of the ignition system in a car is very important. The original Corolla E120 ignition coil acts as a voltage transformer. If any element of the system fails, a complete diagnosis of all components is necessary. The procedure is simple, you can do it yourself.

Toyota Corolla ignition system

The Corolla is equipped with two types of ignition systems: with an external and internal electronic unit.

Toyota Corolla ignition system. Photo source: https://fielder-toyota.ru/electrician3.html

They differ in the location of the switch.

How does the Toyota Corolla ignition system work?

The design of the ignition system of the Japanese car Toyota Corolla E100 from 1996 to 1997:

• egnition lock;
• accumulator battery;
• sensor-distributor;
• transformer;
• crankshaft position sensor;
• ignition module;
• engine control module;
• chain of low-voltage wires;
• high voltage wires;
• candles.

Differences in ignition systems between different Toyota models

From 1998 to 2000, Toyota installed a distributorless ignition, which consists of a camshaft sensor, a crankshaft sensor, two coils for 4 cylinders and an ECM module.

The sensors provide a signal to the ECM, then voltage goes to the converter. For every 2 cylinders, one coil (1-4, 2-3) with high-voltage wires is used.

From one coil there are 2 wires for 2 spark plugs. A spark is produced in both cylinders, but only one of them undergoes the compression cycle.

Ignition coil for Corolla. Photo source: https://motorland.by/auto-parts/toyota/corolla/verso-2002-2004/

The 2001-2002 model was equipped with a DIS ignition system, which consists of camshaft and crankshaft sensors and spark plugs. The last element is equipped with a coil and a module connected to each other.

All 2002 station wagon models based on the Corolla were called Toyota Fielder. The first generation Fielder was equipped with left-hand drive.

Weaknesses of Toyota Corolla ignition coils

The ignition coil of the Toyota Corolla E150, Toyota Verso, as on the E120, is a vulnerable and “capricious” part. Often a part fails due to insulation breakdown, overheating and winding burnout. Damage to the coil greatly affects the ignition system and engine:

• the engine starts with difficulty or stops starting at all;
• the power unit operates unstably: it troits and stalls;
• not setting the ignition leads to detonation, which will accelerate engine wear or lead to breakdown.

How to determine if a Toyota Corolla ignition coil is faulty

If your 2008 Toyota Corolla displays an error message, you need to check the engine, ignition assembly, and coil.

Ignition coil under the hood. Photo source: https://www.drive2.ru/l/464584070861422613/

To find out which element has failed, you need to:

• inspect for cracks;
• start the engine and disconnect the plugs from the coils one by one: if changes occur in the operation of the engine, this indicates the serviceability of the part, but if the power unit operates without changes, then this voltage converter is damaged.
• remove the tip from the spark plug, insert a spare new spark plug into it, press the element body with the threads to the engine block and start the engine for a short time to check sparking.

There are cases when, when the ignition module fails, the Check engine error does not appear.

Checking ignition coils with a multimeter on a Toyota Corolla

Checking the ignition coils using a multimeter on a Toyota Corolla and Verso is carried out in the following way:

1. It is necessary to disconnect the connectors and high voltage wires.
2. Clean the outlet for good contact.
3. Connect the device to the + and – contacts, as well as the primary winding contacts. The result should be 0.4-20 Ohm. Zero resistance indicates a short circuit, while high resistance indicates a possible open circuit.
4. Then we check the secondary winding: connect the black wire to the output of the converter, the red wire to the positive. Indicators should be within 6-15 kOhm. The resistance should be the same on all 4 transformers. A discrepancy will indicate a break in the wiring.

Ignition coil features

Corolla vehicles equipped with multiport fuel injection engines used multiple ignition systems. The equipment differed in the number and location of coils, which could be located on the block head or in spark plug wells.

Before purchasing spare parts, you should clarify the design features and part numbers (for example, using an existing sample or a catalog that takes into account the year of manufacture, sales market and engine cylinder displacement).

Two-pin

Dual products were used on Corolla E-110 cars and were simultaneously connected to 2 spark plugs. A spark was supplied simultaneously to 2 cylinders, but the air-fuel mixture ignited only in 1 chamber. The system included a control unit with automatic adjustment of the ignition timing, which worked in conjunction with the crankshaft and camshaft position sensors.

Dry and oil-filled

Products are usually divided into categories according to the method of insulating the winding from the influence of the external environment. Dry elements are filled with a special compound that can withstand temperature changes and vibration. An alternative is a design with a housing filled with electrical oil. If damaged, the liquid leaks, which is quickly detected by the owner. On the Toyota Corolla with the E-120 body and subsequent modifications, individual elements are used, located in the spark plug wells and secured with a bolt.

Dry elements can withstand temperature changes.

Other types

On carburetor Corolla cars, a single coil was used, working in conjunction with the ignition distributor. The rotating element alternately closed the circuits, providing current to the spark plugs in accordance with the sequence of operation of the cylinders. Some car manufacturers have used common ignition modules for all cylinders; in case of a winding break, a new unit must be purchased.

Toyota Corolla ignition system repair

Before starting to repair this unit, you first need to make sure that this particular part has failed.

Is it possible to repair the ignition coil?

The most common cause of failure is a high voltage breakdown. You can repair the Toyota Corolla coil yourself.

Toyota Corolla ignition system repair. Photo source: https://web-site1.ru

Step-by-step instructions for performing the work:

• in a radio parts store, pick up a heat-shrinkable tube with a diameter of 23-25 ​​mm;
• degrease the part with a special agent;
• prepare 2 tubes of the same length;
• install 1 tube on the coil body;
• To ensure reliable shrinkage, heat the part;
• with tube 2, repeat the same steps to create a second layer.

Some car enthusiasts fix the problem using epoxy resin according to the following scheme:

• the part must be completely dried;
• prepare a container with well-heated epoxy resin;
• use electrical tape to hermetically hide the group of contacts;
• lower the coil into the container up to the silicone tip;
• Allow to dry and you can install.

These universal methods for solving the problem at home will not last long, but will extend the life of the transformer for some time.

How to change the ignition coil tips of a Toyota Corolla yourself

If the engine is unstable, it may be necessary to replace the ignition coil tips of the Toyota Corolla E150. The cause of failure of rubber elements may be the ingress of a small amount of moisture or accumulated condensation. After drying, the tips become tanned, crack and become unusable.

Replacing ignition coil tips. Photo source: https://www.drive2.ru/l/10290065/

To replace you need:

• Using a 10mm wrench, unscrew the two nuts and pull out the two plastic clips;
• disconnect 4 high-voltage wires from the transformers;
• Use a 10mm wrench to unscrew each element from the cylinder block;
• dismantle the coil assemblies;
• Wipe the tip seats with a rag;
• lubricate each rubber element with Teflon grease;
• install the tips on the reel.

How much does it cost to replace an ignition coil at a car service center?

If the transformer coil is burnt out, it cannot be repaired and must be replaced. An experienced mechanic at a service station will quickly perform the replacement. You will have to pay about 500 rubles for the work.

With a minimal set of tools, you can replace the part yourself.

How to change the ignition coil yourself

Corolla E-150 vehicles use coils with replaceable tips; if misfires are detected, the condition of the elements should be checked. The car owner needs to check the condition of the windings with a test device, and then install new tips made of special rubber. To hold the nozzle on the reel body, a protrusion is provided; in addition, high-temperature silicone sealant is applied to the surface.

What you will need

To perform repair work on Toyota Corolla E-150 sedans you will need:

• set of wrenches;
• rags for wiping;
• a flat blade screwdriver for removing the tip.

To carry out repair work you will need a set of wrenches.

Step-by-step instruction

To install new parts on a 2008 Corolla E-150, you must:

1. Drive the car into a garage or onto a level area and turn off the engine.
2. Raise the parking brake and then open the hood.
3. Remove the decorative plastic cover from the engine.
4. Disconnect the electrical wiring plug by carefully releasing the clamp. Do not pull the terminal block by the wires due to the risk of damaging the wires or insulation.
5. Using a 10 mm socket, unscrew the mounting bolt and then pull the coil out of the well. Inspect the tip and check the condition by squeezing the rubber with your fingers; cracks will be visible on the worn part. If there are traces of corrosion on the metal surface, then it is necessary to clean the metal from rust with fine sandpaper (the procedure is carried out if the product continues to be used).
6. Install a new tip or unpack the coil assembly and check the condition of the part.
7. If necessary, change the spark plug, and then carefully insert the new coil until it stops.
8. Tighten the mounting bolt and connect the wiring plug until the latch clicks.
9. Replace the decorative engine cover, close the hood and perform a test run. When the power unit is operating, there should be no vibrations or drops in speed, accompanied by flashing or constant lighting of the Check Engine indicator.

On older Corolla models (for example, with the E-100 body), a common coil is used that works in conjunction with a mechanical ignition pulse distributor. To replace, you will need to disconnect the high-voltage wires, unscrew the fasteners and carefully remove the distributor cover and slider. Then you will need to dismantle the failed part and reassemble the distributor. When connecting the wires, it is important not to make a mistake with the cylinder numbers, otherwise the engine will not start or will operate unstable.

On some machines, access to the distributor is limited by pipes and the air filter housing. A similar problem occurs on the Corolla E-110 with the 5A-FE engine. To simplify access, remove the cover of the filter box with the pressure hose. When removing the slider, do not use a metal tool that can damage the edges of the part. The coil is secured with 4 Phillips head screws.

What to choose: original or analogue

You can install not only original Japanese coils on a Toyota Corolla, but also analogues.

Toyota ignition coil 90919-02258. Photo source: https://claz.org/classifieds?q=ignition+coil

1. The replacement part should be selected by VIN code, year of manufacture, body type. It is better to ask the seller for help.
2. It is necessary to take into account the compatibility of the transformer with the volume of the power unit, since a large engine volume requires more voltage.

The choice of transformers is huge; you can choose a high-quality part for a reasonable price. Photos of the original elements and their analogues are available on the Internet.

Cost of ignition coil for Toyota Corolla

On sale you can find original reels from well-known manufacturers, including used ones, which serve for a long time. These include:

• Toyota 90919-02258 – cost: 6650 rubles;
• Toyota Denso Dic 01-01 – price: 4400 rubles.

You can choose analogues that will also last a long time, but the manufacturer does not guarantee quality.

• Delphi gn10341- 12B 1 – price: 1860 rubles;
• Masuma MIC112 – cost: 2000 rubles;
• NGK 48 395 – price: 1900 rubles;
• NGK U5145 – cost: 2150 rubles.

Among the Chinese analogues, Sailing tyl 91902258 is popular - cost: 1180 rubles.

Reviews from car owners

Roman, 43 years old, St. Petersburg:

“When replacing spark plugs, I discovered cracks on the ignition coils and tips. Factory coils, covered 200,000 km. Friends advised us to install NGK 48 395 transformers. After the replacement, 50,000 km passed, there were no problems. I recommend".

Evgeniy, 30 years old. Rostov:

“The other day I was driving home from work, the engine revved up and the Check light came on: error P0351 (ignition coil). I did some diagnostics and it turned out that the coil had burned out. I went to the store and bought a Masuma MIC-112 transformer. After installing the part, I drove 23,000 km. As long as it works, I recommend it."

The coil performs the main function in the ignition system, which ensures sparking of the spark plugs and stable operation of the engine. Therefore, in case of the slightest malfunction, you need to urgently fix the problem, otherwise a breakdown will occur, which will lead to expensive repairs.

Diagnostics of ignition coils with a multimeter — Toyota Corolla, l., year on DRIVE2

I obviously identified the faulty coil by the spark plugs - the spark plug in the first cylinder was different from the others - it was simply flooded. Full size A spark plug with a dark electrode was in the first cylinder, where the coil was faulty. A visual inspection confirmed the diagnostic result for the spark plugs.

I decided to measure the resistance of all contacts one by one in order to find the differences between the “healthy” coils and the faulty one. And the result was a technique for diagnosing coils using a multimeter.

Diagnostics is carried out in 2 stages: Visual inspection. A visual inspection of the rubber tips and the coil housing showed that the problem did not start yesterday. There were longitudinal cracks on the body along the axis of the reel.

Checking the ignition system (1ZZ-FE/ 3ZZ-FE)

Tightening torque: Install the spark plugs into the ignition coils and Toyota Vitz ignition coil diagnostics coil connectors. Connect the spark plugs to ground. Sparking of the spark plug Make sure that when cranking the crankshaft, sparks are formed on each spark plug (Fig. If an electrical shock is felt when touching a live spark plug, the ignition coil should be replaced.

Do not crank the engine crankshaft for more than 2.

If a spark does not form, perform the following checks. Checking the spark plug Fig. Spark plug cleaner Clean the spark plug fig.

If there are traces of carbon on the electrode, remove it with spark plug cleaner and dry it with compressed air. Air pressure: If there is no spark, replace the ignition coils.

If there is a spark, but the engine does not start, replace the spark plugs with new ones. If after this the engine does not start, check the serviceability of the engine management system.

How to check the ignition coil on a Vitz?

The most common cause of coil failure is overheating or turn-to-turn short-circuits caused by running the engine with excessively large spark plug spark gaps or gaps in high-voltage wire connections. The coils can be checked without removing them from the car.

You will need: The presence of a spark between the electrodes of the Toyota Vitz spark plug; diagnostics of the ignition coil for the serviceability of the coil. In addition, the coils can be checked with a spark-glow diagnostic device 1AP. To do this, disconnect the high voltage wires from the coil and connect the diagnostic device instead. Then turn the engine crankshaft with the starter; a spark should appear in the spark gap of the diagnostic tool in time with the operation of the cylinders.

Functions of the ignition coil in Toyota

The product provides the formation of a high voltage current pulse capable of breaking through the air gap between the electrodes of the spark plug. A spark allows the fuel mixture in the cylinder to ignite; the moment the signal is given is determined by the on-board electronics. The design of the ignition system on the Toyota Corolla with individual coils does not contain high-voltage wires, which increases the reliability of the engine.

The element is tightly placed on the tip of the spark plug; rubber rings installed on the outer part of the body protect the well from moisture.

How to measure the resistance on the ignition coil of a Toyota Corolla?

During such a check, the controller may fail. To fully check the coil, disconnect the two wire blocks from the connectors of the primary winding. Connect an ohmmeter to the terminals of the primary winding and measure its resistance, it should be 0.4-0.5 Ohms. Similarly, connect an ohmmeter to the terminals of the secondary winding and measure its resistance, it should be 5-7 kOhm.

If the check reveals a coil malfunction, unscrew the bolt securing the coil to the cylinder head cover

For express check of the ignition coil for errors P0300, P030X.

- turn off the fuel pump by turning off its fuse - start the engine. - After the engine stalls, crank it two or three times to relieve fuel pressure. — remove all connectors from the ignition coils to avoid electrical discharge from the ignition coils. - turn on the ignition and crank the engine crankshaft with the starter for 5 or more seconds to remove combustion gases in the cylinder. - Connect the spark plug and the wiring harness connector to the ignition coil. - secure with a rope, etc. with a gap of 13 - 17 mm between the central electrode of the spark plug and the grounded metal as shown in the figure. - use the starter to crank the crankshaft for about 3 seconds, and check if there is a spark between the central electrode of the spark plug and the metal

CAUTION: • Do not get within 50cm of the spark plug and ignition coil. Be careful not to receive an electric shock during testing, as the electric discharge voltage is 20KV or more. • If the distance between the central electrode and the metal is more than 17mm, the ignition coil can be damaged. NOTE: If the gap is less than 13 mm when tested, a spark may be created even if the coil is faulty

Taken from the original Nissan manual

Video of checking the coils on the arrester, the third coil is faulty.

• why is the check light on?
• Why does the engine shake after washing?
• looking for battery current leak
• checking the generator without removing it

This test method is very visual, but it is not always possible to check ignition coils with a spark gap. In many modern cars, the ignition coils are located under the intake manifold. In this case, we use a motor tester to diagnose the ignition coils. Here is an example of diagnosing a faulty ignition coil of a Lexus RX300; the owner complained about a “triggering” engine and a flashing check. Also, driving with such a malfunction can lead to destruction of the catalyst.

This is what the oscillogram of a working ignition coil looks like:

• honda crv stalls
• honda accord troit
• toyota camry troit
• toyota corona troit
• why is the car shaking

The main reason for failure of ignition coils is worn-out spark plug electrodes; compare the spark gap of the left and right spark plugs.

Plugs and ignition coil Toyota Corolla 120

The reliability of ignition of the air-fuel mixture and the stability of the Toyota Corolla 120 power plant depend on the condition of the spark plugs and ignition coils. Failure of any of the elements leads to engine tripping, a significant deterioration in dynamics, an increase in fuel consumption and can cause a reduction in engine life. Therefore, it is extremely important to change spark plugs and ignition coils in a timely manner, purchasing only recommended products.

Signs of a broken ignition coil

Main symptoms of a malfunction:

• difficulty starting the engine (the problem may be intermittent and depend on temperature or air humidity);
• floating idle speed until the engine stops spontaneously;
• jerking and unstable operation of the power unit under load;
• increased fuel consumption (subject to maintaining the management style and operating conditions).

On Corolla cars with an electronic fuel injection system, diagnostics of components is provided with recording of error codes P0351...P0354. If the spark plugs are unstable, information about the malfunction is entered into the controller’s memory, and an orange “check” light turns on in the instrument cluster. You can read codes using a scanner or adapter connected to the OBD II diagnostic connector. If the errors are random, then after the information is deleted the indicator goes out. When the problem is fixed again, the code is written again.

Difficulty starting the engine is a sign of a malfunction.

Article and price of branded candles for Corolla 120 and their analogues

The original spark plugs that come with the Corolla 120 are Toyota SK20R11. Their article number is 9008091180.

The price of branded candles ranges from 400 to 600 rubles. The car can also be equipped with Denso Iridium Tough VK20 iridium spark plugs, the cost of which reaches 800 rubles.

Moreover, their service life is up to 100 thousand km. Other analogues of the original Toyota Corolla 120 spark plugs can be found in the table below.

Table - Good analogs of original spark plugs for Corolla 120

Recommendations for replacement intervals

According to the automaker's recommendation, spark plugs should be replaced every 50 thousand km. Original products can last longer, so car owners are advised to replace them after reaching a mileage of 70 thousand km.

During the operation of the vehicle, unscheduled replacement of spark plugs may be required. It is usually associated with their damage or lack of a normal spark between the electrodes. Situations when it is necessary to install a new set of spark plugs are shown in the image below.

Tools required to replace spark plugs

In order for the spark plug replacement to be successful, you will need the tools from the table below.

Table - Tools for replacing spark plugs on Corolla 120

Description of replacing spark plugs on Toyota Corolla 120

It is recommended to replace spark plugs on a Corolla 120 according to the instructions given below.

• Open the hood.

• Disconnect the negative terminal from the battery.
• Unscrew the two nuts securing the decorative engine cover and remove it.

• Clean up dirt.

• Remove the terminal block from the ignition coil. To do this, you need to hold the latch on it and pull the connector.

• Using a wrench, unscrew the ignition coil.

• Pull the spool up with force. This will allow you to remove it from the spark plug well.

• Blow out contamination from the spark plug well. This will prevent debris from getting into the working chamber or onto the threads.

• Unscrew the spark plug.

• Using a spark plug wrench, remove the spark plug from the well.

• Screw in a new spark plug. It is recommended to control the tightening torque, which should be 25 Nm.

• Treat the ignition coils with dielectric gel.
• Reassemble everything in the reverse order of removal.

Article number and cost of the original ignition coil for Corolla 120 and its analogues

The original Corolla 120 ignition coil has catalog number 9091902262. Its cost is about 3,000 rubles. Since the price for a branded product is quite high, many car owners purchase reels from car dismantling yards.

The cost for a used spare part is in the range of 700-1000 rubles. An alternative solution to the problem of a failed ignition coil is to purchase an analogue of a branded product from third-party manufacturers. The best brands, according to reviews from car owners, are listed in the table below.

Table - Ignition coils for Corolla 120 from third-party manufacturers

Description of the process of checking the ignition coil on the Corolla 120

If you suspect that one of the ignition coils has failed, you must use the method below to identify the faulty element:

• Start the power plant.
• Open the hood.
• Remove the ignition coils one by one. If the sound of the motor does not change after removing the coil, then with a high degree of probability this indicates its malfunction. This method carries the risk of damaging the ECU, so it should only be used in extreme cases.

Another method of identifying a faulty coil is to install a known-good product in its place. The main disadvantage of this method is the need to have a spare, working coil.

• An indirect sign of a coil malfunction is the unsatisfactory condition of one of the spark plugs. Due to the lack of normal ignition, carbon deposits appear on the electrodes.

Checking the ignition coil should begin with its visual inspection. It is necessary to check the condition of the body and tips. There should be no cracks, deformations, soot or discoloration.

If there are defects, do not try to eliminate them using electrical tape or heat shrink. Their breakdown voltage is much lower than that created by the ignition coil. The only way to repair is to replace the damaged area with epoxy resin.

If a visual inspection does not reveal any defects, then it is necessary to check the condition of the coil using measuring instruments. They can be used as a multimeter or ohmmeter. It is necessary to measure the resistance at the control points. They are the central electrode and the terminal block contacts.

To check if the coil is faulty, you need to check the resistance between the contacts and the central electrode. The data obtained should be entered into the table and compared with a working coil. Any significant deviations indicate a malfunction of the product being tested.

Table - Summary data to identify a faulty coil

It is also necessary to check the condition of the insulation. To do this, use a megger or multimeter. You should check that there is no breakdown between the contacts and the housing.

How to check the ignition coil

The owner of a Corolla car can identify a faulty coil by visual inspection; other troubleshooting methods involve the use of special equipment. The main sign of a malfunction is errors in the memory of the control unit; if the codes are permanently fixed, the products must be swapped. If the problem goes to another cylinder, the part must be replaced. Otherwise, you will need to check the condition of the wiring harnesses and connectors of the ignition system or make sure that the spark plugs are in good condition.

Visual inspection

Before checking the ignition coil, it is necessary to remove the decorative cover and remove the assembly from the car. There should be no cracks or traces of breakdown on the insulator, and soot or foreign oxide deposits should not be visible on the contacts. The electrical wiring harness block is equipped with a guide pin that prevents incorrect switching; the owner needs to check the integrity of the cable cores and make sure there is no damage to the insulation.

There should be no visible carbon deposits on the ignition coil.

To the spark

The technology involves installing a spark plug in a special chamber with increased pressure to simulate operating conditions in an engine. After installing the coil, power is supplied to the tip, a spark should jump between the contacts. The method allows you to indirectly determine the serviceability of the product, since interruptions in operation can occur in a narrow speed range or when the windings heat up.

Using a multimeter

Testing a product using a device (multimeter or ohmmeter) consists of the following steps:

1. Determination of the resistance of the primary winding (between the contacts to which power is supplied), which should be in the range from 0.4 to 2 Ohms (it is necessary to clarify the nominal value for the design being tested in advance). A drop in the parameter indicates a short circuit between the turns, and infinite resistance signals an open circuit.
2. Checking the condition of the secondary winding (between the contacts used to connect the spark plug). A drop in resistance below the permissible limit indicates a short circuit, and an increase in the parameter to infinity corresponds to a break.

Oscilloscope

In service conditions, products are tested using an oscilloscope. The recorded operating graph is compared with the curve corresponding to a working ignition system. Based on deviations, the causes of malfunctions are determined, and after repairs, repeated measurements are carried out. The technique is rarely used; malfunction of ignition system components is determined at the stages of visual inspection or checking the resistance of the windings.

An oscilloscope is used to test products.