Scannable error codes on cars of the Lada Vesta family

November 26, 2015 Lada.Online 89 526 33

During vehicle operation, various malfunctions may occur, which are recorded and stored in the engine electronic control units (ECU) in the form of error codes. Using diagnostic adapters and scanners, you can read errors from memory and determine the cause of problems.

If errors occur, the Check Engine indicator lights up on the dashboard. For computer diagnostics of Vesta or XRAY, you should connect to the OBD-II connector and use a special program to download error codes. They can be decrypted as follows:

• first character (B - body; C - chassis (suspension); P - engine (ECM), gearbox; U - data exchange bus.)
• second character (0 - standard (SAE); 1, 2 - factory (OEM); 3 - reserved.)
• third character (1, 2 - fuel system; 3 - ignition system; 4 - reduction of exhaust gas toxicity; 5 - idling; 6 - ECU or its circuits; 7, 8 - transmission (automatic transmission).)
• the fourth character is the error code.

Advice

: To read errors in electronic units, car owners often use the ELM327 adapter (buy on Ali) and the OpenDiag application in their smartphone.

List of control system sensors

KSUD - vehicle control system controller, is a complex device with its own operating algorithm. It accumulates signals coming from all vehicle systems. The following types of sensors are installed on Vesta:

When the vehicle is equipped with an automatic transmission, the system additionally receives signals from the transmission. Sensors for transmission oil temperature, end positions of switching and spool mechanisms, and hydraulic unit rotation speed are located directly on the gearbox housing.

Why is the check engine light on, what should I do next?

In a situation where the check light is on or flashing, the driver must listen to the operation of the mechanisms. If there are no failures or noticeable changes in the operation of the engine, there may be an error or failure of the Lada automatic system. Turn off the engine and start it again. If the check engine lights up again, some problems have arisen, and it’s not on for nothing.

Try to cope with the situation. Please note if there are any changes in the vehicle's performance. If the engine is operating in normal mode and the Vesta drives normally, it does not twitch, there are no knocks, squeaks or noises, check the fuel tank cap. If it is not tightly screwed, or the integrity of the tank itself is compromised, the check may also catch fire.

Other problems are also possible - a malfunction of the oxygen sensor, low-quality fuel, a broken gas pedal, etc.

Operating principle of the controller

The ECM has its own RAM and is capable of storing error codes. It is, in fact, a central processor that controls the actuators. The controller is located in the engine compartment on the left shock absorber support.

Functions:

• car ignition control;
• internal system diagnostics;
• turning on the warning indication on the instrument panel;
• storing error codes in memory;
• emergency warning.

The M86 controller exchanges data with vehicle system sensors by transmitting a signal via a high-speed CAN bus. Due to this, the data is updated every 0.05 seconds, and the car is always under complete control.

The device, like a personal computer, has 2 types of memory:

• constant - ROM;
• operational - RAM.

It is important to remember that the controller is powered by reduced voltage. Any surges are detrimental to microprocessor boards. Therefore, before starting any work, you must disconnect both terminals of the battery.

Battery disconnect method

Step 2: Discharge the remaining electricity. The next thing you should do is press and hold the car horn for about 30 seconds. This action will help drain the car battery.

Step 3: Wait and reconnect the battery. After disconnecting the battery cables and draining the remaining electricity, all you have to do is wait about 15 minutes and then plug the battery back in. Error codes will be cleared. (Note: This method may not work on some vehicles.) If after this procedure the “check” lights up again, this may mean that the problem is still much more serious.

Diagnostics

Diagnostics of the Lada Vesta car control system is a simple and understandable process. Part of the work is performed by the ECM, independently determining the current state of the main components. In a situation that requires the driver's attention, it can turn on the "Mil" signal mnemogram. This will mean that the diagnosis needs to be performed soon, but the fault is not critical.

In many ways, the correct behavior of the car depends precisely on the condition of the internal combustion engine. The main deviations that can be mistakenly identified by a diagnostician as an electronics failure are:

• reduction of compression in cylinders;
• presence of air leaks in the air tract;
• violation of gas distribution;
• low fuel quality;
• wear of friction pairs in engine mechanisms.

In each case, it is necessary to investigate the error in detail and check all the systems that contribute to its occurrence.

Instructions for diagnosing VESTA via OBD2 connector with your own hands via a laptop or smartphone

Determine where the OBD2 connector is located

Determine which scanner is suitable for your car

The selection of a scanner (adapter) for LADA VESTA depends on the ECU model, as well as the needs of the diagnostician / car owner.

To select diagnostic equipment, use the calculator: “Selecting a scanner for Lada Vesta”

Download the diagnostic program for the scanner

The diagnostic adapter requires software that can be installed on a laptop or smartphone/tablet. Auto scanners with their own software shell and display do not require software.

To select a program for the adapter, go to the section: “Programs”

Use the instructions and carry out diagnostics

When you purchase an adapter, instructions are included with the adapter. More detailed instructions on diagnostic car scanners and descriptions of their operation are posted in the section: “OBD2 car scanner reviews”

Identify errors and decipher them

Error codes and their interpretation are displayed in the scanner program interface. You can also study the complete database of errors for your car in the section: “OBD2 error codes for Lada Vesta”

Make repairs according to the error code

The unit is repaired according to the decoding of the error (problem) or contact a car service to eliminate a particular malfunction.

Check errors again

Scan Tool Pro - budget multiscanner for Lada Vesta

A good choice for a novice diagnostician

Nowadays there are scanner models with different versions of firmware and chips on sale. Scan Tool Pro with firmware 2022 is the most stable version so far, and also has maximum compatibility with cars manufactured since 2001, including Lada Vesta.

By following the link on the right you can get acquainted with the scanner for autodiagnostics “Scan Tool Pro”. This is an official dealer website that provides a 12 month warranty.

Fault codes

In the process of assessing the technical condition of a car, it is necessary to be able to decipher not only error codes, but also use diagnostic cards. Detailed information about the operating logic of the M86 electronic controller is presented in the operating manual and technical description of the product.

The most common errors that occur during vehicle operation are presented in the table below.

General questions about OBD2 on Grant

Let's look at questions about OBD2 on Grant - a diagram of what it is needed for.

How to use the connector

The main options for using OBD2 in Grant:

• Connecting a scanner to check the car and work with errors;
• Installation and connection of an on-board computer of the State or Multitronics type.

It will be useful to connect the on-board computer - this is how you can:

1. control engine temperature;
2. receive error codes immediately when they occur;
3. force the cooling fan to turn on.

Diagnostic block diagram

The contact diagram of the block is shown in the picture:

The pinout of the block can be useful in the manufacture of adapters for OBD2.

Features of the manifestation of error P0901

Many motorists have experienced severe clutch failure. The first signs are the blinking of the “gear” icon on the instrument panel. This is followed by uncontrolled shutdown of the transmission. This is very inconvenient for the driver, as he loses the opportunity to even pull over to the side of the road, often not understanding what is happening to the car.

If a similar situation arises on the way, it is recommended to turn off the engine and wait 2-3 minutes for the RAM to reset. After restarting the engine, the error disappears for a short time. This is enough to leave the lane or stop on a traffic island.

Error P0901 is a malfunction of the clutch actuator in 99% of cases and only 1% is a software failure. A licensed car service determines the malfunction quickly enough. Error sign “4b” indicates overheating of the couplings and the entire mechanism. The cost of the actuator ranges from 5,000 to 8,000 rubles. To replace it, you will need to drain the oil from the gearbox, disconnect part of the intake tract and sensors.

As a rule, the first signs of malfunction appear after 60-70 thousand km of intensive mileage during the first two years of operation. You should not downplay the significance of this error, since a faulty actuator will sooner or later lead to the need to replace the entire Vesta clutch mechanism.

Lada Vesta alarm installation with can bus

Ignition switch: +12 – brown ign1 – blue/black starter – red Instrument panel: turns – blue and blue/black handbrake – brown/blue (in the diode)
Driver’s threshold: driver’s limit switch – red/green, we connect the rest to it doors

Under the hood: Tahoe - white/black on the ignition module, the hood tip is in its normal place

Trunk limit switch – we install the connector on the trunk (the limit switch is already in the lock).

central locking .

Robot error indication

The phenomenon of indicating a malfunction in the Lada Vesta robotic gearbox is a common phenomenon even on new cars. But according to the statements of AvtoVAZ designers, it is not a malfunction. The car can continue to be used in normal modes.

The main reason is said to be a “conflict between the box control system and additional equipment,” including the security alarm. Sometimes the alarm appears when the battery is low. During winter periods, cold transmission oil also causes an error.

With frequent stops along the route and the nominal load of the machine, temperature sensors send signals to the security system. The clutch periodically slips briefly, which causes the information indicator to light up. The same situation can arise when driving along a long climb.

As a measure to stabilize the operation of the gearbox, it is recommended to set the shift lever to the “neutral” position in all possible situations: stopping in a traffic jam, parking at traffic lights, waiting for a passenger. During this time, the transmission oil has time to “calm down”, foaming decreases, and the automation begins to operate normally.

The first engine starts after frost are often accompanied by the appearance of an indication. It disappears when you start moving or the oil temperature in the “robot” reaches 40-500C.

Live Stream

General Director of LADA Izhevsk LLC Mikhail Ryabov congratulated everyone present on the start of production.

– The result of all the efforts and engineering work of our specialists was a very good product, in demand by the buyer. Once again, happy holiday to everyone, and a good journey to our product,” commented Ryabov.

The distinguished guests of the event left their autographs on the body of the first LADA Vesta SW Cross, after which all those present were invited to get to know the car better and look into the interior.

Checking the serviceability of the instrument console

The owner of Vesta can promptly notice deviations in the normal operation of the systems only if the dashboard is in full working order. The built-in automatic diagnostic function can prevent up to 90% of failures. Timely intervention and repairs save money on expensive replacement of components, parts, and mechanisms.

The test is performed automatically every time the engine is started. To assess the serviceability and readiness of devices, it is enough:

1. turn off the car ignition;
2. press and hold the “up” button on the on-board computer for several seconds;
3. Set the ignition to the “On” position.

After this, all the arrows on the instrument panel should deviate to the maximum amplitude, and all indicator lights should light up at full intensity. This indicates the serviceability of the electrical system and its readiness to initiate readings.

Is it possible to continue driving while the light is on?

When a check light comes on on the panel, the ability to move on depends on the reason. You can continue driving if an error occurs or the Lada Vesta’s automation fails. Driving can be resumed if the flashing of the beacon is due to a loose cap, damage to the fuel tank, or a malfunction of the exhaust catalyst. In any case, check the engine and spark plugs for serviceability. To do this, contact a service center where they will perform diagnostics. The indicator may appear due to a malfunction of the automatic gas pedal. Resuming movement will be problematic. If you have problems with the operation of the engine, it is better to refrain until the cause is found out. Contact the service center and they will send you a tow truck.

Why do the check engine lights come on and what contributes to this?

The appearance of the check engine indicator on the Lada Vesta:

• Poor quality fuel causes clogging of fuel injectors.
• Damage to the integrity of the fuel tank.
• Loose or damaged tank cap.
• Increases fuel consumption, the automatic system signals an error and the indicator lights up.
• The exhaust catalyst has failed and the exhaust system does not function.
• Engine sensors are not working.
• The automatic gas pedal is broken.
• In such a situation, only replacing it with a new one will help.
• The air consumption sensor is broken. Leads to an increase in fuel consumption, and the carbon dioxide content in the exhaust increases. The control system reacts by turning on the check signal.
• The spark plugs need to be replaced.

Owners of Lada Vesta cars should undergo timely maintenance and refuel the car at stations where proven, high-quality fuel is used.

When the check engine light on the Vesta panel lights up, don’t forget about it. Contact the service center and carry out diagnostics.

The domestic manufacturer allows the driver to independently repair the car without resorting to the help of specialists. General error codes of Lada Vesta can be read without third-party components and special equipment. Self-diagnosis via the on-board computer shows only part of the codes and can notify the driver of the area of ​​damage.