Deciphering and eliminating errors on the VAZ 2114 - independent diagnosis of all faults

The presence of an on-board computer on a car allows you to identify faults in a timely manner and take appropriate measures before the breakdown becomes serious and expensive to fix.

VAZ 2114 car

The main thing here is to be able to correctly read error codes when diagnosing a VAZ 2114. Not everyone understands what exactly the car is indicating when issuing certain designations. Therefore, today we will try to talk about the most common error codes and note what each of them means.

Car self-diagnosis

The self-diagnosis procedure is performed as follows:

1. When the ignition is turned off, the odometer daily mileage reset button is pressed.
2. Then the key is installed in the switch and turned. It is rotated to the first position to activate the ignition system.
3. After turning the key, the mileage reset button is released. The arrows on the speedometer, tachometer, fuel and engine temperature gauge will begin to move from the minimum value to the maximum.
4. The daily mileage reset button is pressed again. An inscription with the board firmware version will be displayed on the instrument cluster.
5. The button is pressed again. After this, VAZ 2114 error codes will begin to be displayed on the dashboard screen.

Deciphering the VAZ 2114 self-diagnosis error codes will help you identify vehicle malfunctions and understand what actions need to be taken.

The channel “Your Own Mechanic” talked about carrying out a self-diagnosis procedure on a VAZ 2114 car.

Resetting the "Check Engine" error

If the trouble codes have been corrected, you need to erase the Receipt from the ECU (electronic control unit) memory. Otherwise, the indicator will light up on the dashboard when there are actually no errors.

Step-by-step instruction:

1. The ignition is activated, but the car engine does not start.
2. The engine compartment of the car opens. Use a wrench to loosen the bolt that secures the terminal clamp to the negative terminal of the battery.
3. Then you need to wait about a minute, then the battery terminal must be connected back.
4. The engine compartment of the car is closed and the ignition is turned off.
5. Then the power unit of the machine is started.

If the Check indicator continues to light, then you need to wait a while, it should disappear on its own. If the Check Engine light does not disappear from the dashboard, we can conclude that troubleshooting has not been performed.

User Ravil Shayakhmetov showed the procedure for independently removing the Check error from the dashboard of a VAZ car.

How can I reset errors myself?

To delete the data remaining in the memory of the control unit, a repeated self-diagnosis of all systems is performed. Once error codes are displayed, the information is recorded. Pressing the daily mileage reset button again will delete the fault data from the ECU memory.

The Glaz Szalg channel spoke in detail about resetting errors in VAZ cars.

How to fix the problem

After diagnosis, the problem should be repaired. When reading a signal, it is necessary to check the circuit and devices following it. The most accurate method is to replace the damaged part with a known good one (new). This will eliminate the possibility of incorrect repairs. If the device is in working condition, the lines are checked; usually a primitive test is sufficient. However, if the control unit or relay fails, you will need a special tester and the ability to use it.

Separately, it is necessary to take into account that factory terminals and blocks become loose and oxidize over time. If the contact on the hitch deteriorates, the on-board computer or laptop program will say that the part is damaged, even if it is not.

You can prevent this from happening in the following way.

1. Check the condition of the connectors once every 5000 km. The pads should sit in place tightly, without play. If necessary, elements must be replaced with new ones.
2. Check plug connectors two to three times a year for oxidation. Oxides reduce the flow of electricity through on-board wiring, which leads to incorrect display of information.
3. Experts recommend purchasing and using oil for electrical terminals. The liquid is similar in composition to transformer lubricants. The formula prevents water and oxygen from reaching metals, which prevents them from rusting.

Important!

You can diagnose VAZ 2114 error codes on the instrument panel and ECU yourself, only if you understand the essence of the process. If you don’t have confidence in your own abilities, it is recommended to contact a qualified technician.

If you have the appropriate knowledge and the necessary equipment, you can find and correctly decipher the error codes of the VAZ 2115 injector and other elements yourself. Due to the simplicity of the car's electrical circuit, the user does not require deep knowledge of mechanics or electronics.

Meaning and interpretation of error codes

Error codes in the form of one and two-digit numbers:

Self-diagnosis codes sometimes add up. For example, error 6 can be the sum of 2 and 4, and fault 9 can be the sum of 1 and 8.

Combinations of problems when performing computer diagnostics are displayed in four-digit form:

The author Igor Belov spoke in detail about ways to help decipher car fault codes.

Nuances of self-diagnosis

Indications for self-diagnosis and contacting specialized service stations will be different, error codes are also displayed differently. Therefore, today we will consider two options.

It is not at all necessary to use the on-board computer to diagnose problems with the car. Not all VAZ 2114 owners know about this method, so we will definitely tell you about it.

It consists of the following steps.

1. Sit in the driver's seat and hold down the odometer button.
2. Then turn the ignition key to the first position.
3. Release the odometer button. After this, the arrows will start moving.
4. Press the button again and turn it off. This will allow you to see which firmware version is used in your case.
5. Press and release the button a third time. So you will see codes indicating the presence of certain errors in the operation of the car.

Since this is not specialized equipment, the codes will be presented in this case as two-digit designations, rather than four-digit ones.

Let's now look at the most popular errors that occur during such diagnostics and figure out what the code means. Even without an on-board computer, you can detect faults on the VAZ 2114 using the odometer codes.

We suggest you familiarize yourself with them in the table.

It is important to take into account the fact that mistakes can add up. For example, if your car has faults indicated by codes 4 and 1, the odometer will show the number 5.

Plus, all fault codes will be stored in memory until you manually reset them. To do this, you need to disconnect the terminals from the battery while keeping the ignition on, wait a few seconds and connect it back. Don’t forget to do this, especially if you are going to go to a service station for diagnostics. They will find these errors and will eliminate them, although in fact you have already done everything yourself before. Pay extra money? No, it's not worth it.

What are the errors that indicate a faulty phase sensor?

There are two error codes that indicate a faulty phase sensor:

• 0340;
• 0343.

Symptoms of problems will be as follows:

• the car moves jerkily, and the driving speed noticeably decreases;
• the power of the power unit decreases, in some cases the car cannot pick up speed above 60 km/h;
• the engine stalls when the gear is in neutral, for example, at traffic lights;
• the dynamics of the power unit decreases, shocks during acceleration, pops in the exhaust system;
• The ignition spark may completely disappear, as a result of which the car engine will not start.

Error code 0340

Error code 0340 indicates a faulty phase controller. The camshaft sensor needs to be checked for functionality. Sometimes error 0340 is associated with problems with the crankshaft position controller. The malfunction may be caused by the fact that the timing belt (gas distribution mechanism) has slipped by one tooth.

Error code 0343

Combination 0340 indicates an increased signal coming from the phase sensor. If the controller is working properly, then the contact elements on the device connector are subject to diagnostics. Perhaps the problem lies in their damage or oxidation. It is necessary to clean the contacts and ring the power line. There should always be a 12-volt voltage at the controller terminal (element A), and 0 at the other contacts.

The channel “In Sandro’s Garage” talked about troubleshooting a problem related to the operation of the camshaft sensor.

Diagnostics using special equipment

If you resort to a verification method using special equipment, you will need a computer on which diagnostic software is pre-installed.

The necessary software (programs) is downloaded from the Internet:

1. "Uniscan". A series of “software” used for diagnostic testing of almost any cars from major manufacturers (USA, EU, Japan, Korea) manufactured no earlier than 2001.
2. “Motor Tester”. A powerful semi-professional program with which you can diagnose many Russian-made cars (VAZ, UAZ, GAZ, etc.).
3. “Vagcom” and “Vag Tool”. Two programs for diagnosing machines related to the so-called. VAG group (Volkswagen-Audi group). Allows you to work with brands such as Audi, Seat, etc.

To connect to the diagnostic output, you will need a wire with an adapter. One end of the cable is connected to the header, and the other to the USB input on the computer or laptop.

For diagnostics, perform the following steps:

1. A detailed inspection of the car is carried out. The car owner checks the availability of consumables. This can be brake fluid, engine and transmission oil, and antifreeze.
2. The diagnostic output is searched for and a computer is connected to it. The ignition system in the car is first activated by turning the key in the lock to the appropriate position. The engine should not start. If there is a special scanner, then instead of a computer, this equipment is connected to the diagnostic connector.
3. Then the diagnostic software is launched. Depending on the developer, the utility interface may differ. In many programs, when launched, graphs or technical parameters of the car with numbers appear.
4. The car begins checking for errors; to do this, press the corresponding button in the program. At the end of testing, the utility displays error codes.