Self-diagnosis error codes vaz 2112 16 valves. Diagnostics of malfunctions of the electronic system of automatic control of the VAZ engine

The topic of this article will be the diagnosis of tidy on the VAZ 2110, 2111, 2112.

In order to start the self-diagnosis mode of instrument clusters, it is necessary to turn on the ignition while holding down the button that resets the daily mileage.

How to understand that the mode has started? It's very simple, the oil pressure lights, the battery icon, the fuel warning light and the check light will start to burn. In this case, all arrows begin to move from the initial position to the maximum, and this process is repeated. Thus, you can check the operation of all bulbs, devices, arrows.

When you press the button to reset the mileage per day, an error code will appear to us.

To reset this error, you need to hold down and hold the button that resets the daily mileage. Until the error is reset to 0.

To check that the errors have been reset, we repeat the procedure: we enter the mode - diagnostics of the VAZ 2110 tidy (when the ignition is turned on, we press and hold the button that resets the mileage); press the mileage reset button three times and look at the on-board screen. It should show 0.

Decided on this. But, now we need to find out what kind of error we identified during self-diagnosis of instrument clusters. There is a table for this.

If the number is different, for example, like ours, this means that there are several errors and the computer shows their sum: 6 (2+4), 10 (2+8), 12 (4+8), 14 (2+4+ 8).

You can watch the whole process in the video below:

We sorted out the errors during self-diagnosis of the VAZ 2110 instrument clusters, but here you can see (when the engine light comes on) for yourself.

In a VAZ 2110 car, injector errors that are issued through the on-board computer can be deciphered using special tables. As a rule, the ECU issues errors in the form of codes consisting of the letter P and four digits.
You can solve problems in various ways, but first you need to find out what kind of problems are observed in the car. You can recognize the error injector on the VAZ 2110 on your own if you know the decoding.

Possible mistakes

Errors can relate to various parts of the car:

• Sensors. Temperature sensors are the most commonly affected.
• nozzles (see). Basically, problems are observed due to an open circuit, as a result of which the nozzles cannot light up in time.
• Engine. Typically, engine problems appear after a long drive in a car. The most common mistake is overheating.
• Valves.
• Fans. If they do not work with all their strength, then the machine will overheat. Therefore, incorrect fan operation errors lead to motor overheating errors.
• Relay.
• controller.

Consider the most common VAZ 2110 injector error codes that the system issues:

• P0101. In this scenario, there is a problem with . When such a code appears on the on-board computer screen, you should check whether the sensor is really damaged.

Note: during the test, it is impossible for the air to be consumed more than the allowable rate.

• P0113. This means that the intake air temperature sensor is defective. It is important to check if the temperature does not exceed the norm.
• P0116. If this code appears on the ECU screen, then there are problems with the antifreeze temperature control sensor. First of all, you need to check whether the sensor actually works poorly, and after that drive the car to a car service.

Note: if the temperature is below the required value, then this defect must be urgently eliminated, otherwise it can lead to disastrous consequences.

• P2135. In this case, the error indicates an incorrect throttle position. It is possible that the signal between the sensors has weakened, so they cannot correctly indicate its location.
  If, after diagnostics, it was found that the voltage of one sensor is higher by a threshold compared to the other, then repair cannot be avoided.
• P2122. One of the accelerator pedal sensors shows too low values. At the same time, too low voltage is observed in it.
  You need to check the voltage in the sensor with a voltmeter. If necessary, replace the defective sensor.
• P0201. In this case, an open circuit is possible in the injector control circuit. It is necessary to diagnose the drivers, as the error may be generated due to them.
• P0130. You should check if the signal circuit is complete.

Note: you need to take some action if the voltage in the circuit is below or above normal.

• P0133. If for some reason the signal lasts longer than necessary, it will give exactly this error. The reason for this malfunction is too slow response from the signaling system.
• P0030. You need to check if there is an open in the heater circuit. If necessary, perform driver diagnostics.
• P0171. Perhaps the heating mixture has become too lean.
  Therefore, the driver must check whether its content is too poor. If the heat transfer is above the norm, then this must be corrected, and the defects eliminated.
• P0172. It is necessary to check the poverty of the composition of the mixture.
• ​ P0217. The engine has overheated. It is necessary to monitor the increase in temperature in it.

Note: if the temperature here is above the threshold value, then repairs are urgently needed, otherwise the engine may soon boil right on the road.

• P0300. In the process of ignition, toxic gases may be released. In fact, they are always allocated, but they are successfully removed through the exhaust pipe.
  Moreover, if for some reason gaps are observed in the system, then toxic substances can enter directly into the interior of the car.
• P0326. may not always work. You should check if its signal level is too low. If necessary, regulate and normalize this level.
• P0335. The crankshaft position sensor is defective. You need to check if there is a signal coming from the sensor. If the signal is low, then the air flow should be changed if it is above the maximum value.
• P0340. The camshaft position sensor is defective. You should check if there is a signal.

Note: Most problems occur when the sensor signal does not change while the engine is running.

• Z0351. The circuit may be broken. In the primary circuit, the current does not reach the optimum level.

If the injector malfunction light is on

Injector VAZ 2110 16 - valve

In some cases, the injector malfunction light is on until the engine warms up to 90 degrees.
This problem usually occurs during the cold season. And although, such a problem is not too serious, it will have to be solved anyway.
There are several ways to resolve this situation:

• Replace injector sensor. As a rule, if the light is on for a long time, then this sensor will soon break down due to overvoltage in the network.
  And in any case, it will have to be changed. So why not do it sooner? Moreover, this process will take a maximum of 30-40 minutes.
• Make firmware. Of course, you won’t be able to do it yourself, but in a car service, specialists will do everything without any problems in the shortest possible time.

• Remove battery terminals. Perhaps the light bulb lit up, but did not go out. And when there is no more voltage in the network, the light bulb will definitely stop glowing.

Note: but after connecting the terminals back, the bulb may light up again. In this case, there is only one thing left - only to take the car to a car service.

You can also determine what the ECU gives out for an error at home. But identifying an error is still half the trouble.
It still needs to be removed. And it is not always possible to do it yourself.
Approximate price of work in a car dealership may be different. Of course, if you do not have the required amount, you can try to make repairs yourself.
Before that, you should familiarize yourself with photos and videos on this topic (there are a dime a dozen on the Internet). The instruction will also not be superfluous.

Several variants of Samara cars with VAZ-2111 engines come off the assembly line of the Togliatti AvtoVAZ plant. These engines are equipped with a multi-port fuel injection system, which has several options.

The first version of the system is the fruit of the joint work of AvtoVAZ and the American company GENERAL MOTORS (GM), which is intended only for export. The car complies with Euro-2 environmental standards, it has a converter installed, the injection system has an oxygen concentration sensor (DCC) installed in the exhaust gas stream (FOG). But the engine must only run on unleaded gasoline, otherwise the named elements will fail. Components for such an injection system are supplied by GM.

The second option is for the domestic market. Its peculiarity is the electronic control unit (ECU) of its own design January-4, the components of the system are Russian, it does not have a converter and DCC, the use of leaded gasoline is allowed. Parts for the second version of the system are produced in small batches at various domestic enterprises. The contact connectors of the nodes and blocks in the systems of the first and second options are the same, some of them are interchangeable.

The third option appeared thanks to cooperation with the German company BOSCH. The 2111 engine has been given five "powers" - now it develops 57 kW (77 hp) of power. A new intake manifold was installed, and a camshaft with "wider" phases. Two control units have been developed: a cheaper EBU-M1.5.4, which provides Euro-2 toxicity standards, and a promising EBU-MR 7.0, which is more expensive, but meets the more stringent Euro-3 requirements. The third version of the system has original connectors, and the system is not compatible with the first two.

You can determine what type of injection system the engine of a particular car is equipped with by the inscription on the computer, which contains the VAZ catalog number, name, serial number and date of manufacture of the unit. The ECU is also called the controller. Data for various types of controllers are given in Table. 1-3.

ESAU-D controllers operate under the control of a program stored in the ECU memory device. Different versions of the programs allow you to create controller modifications to work with different models of engines and ensure compliance with various environmental standards.

Data on software versions (software) for ESAU-VAZ, its correspondence to the controller type and their interchangeability are given in Table. 4. In the table, the numbers of interchangeable blocks and programs are combined into groups.

Deciphering the designation of VAZ development software

As an example, consider the designation: M1 V 13 O 54.

First rank

- letter and number (in the example - M1) - indicates the type (family) of the controller:
J4 - a family of control units January-4;
J5 - a family of control units January-5;
M1 - a family of control units BOSCH Motronik M1.5.4;
M7 - a family of BOSCH Motronik MP7.0 control units.

Second rank

- a letter (in the example - V) - indicates the type of car, development status or theme code:
V - all front-wheel drive cars VAZ of the 2108, 2110 family;
N - a family of all-wheel drive models of VAZ cars.

Third rank

- two digits (for example, 13) - indicates the conditional number of the configuration (00 ... 99):
03 - Euro-2 toxicity standards, engine 2111;
05 - Euro-2 toxicity standards, engine 2112;
07 - Russian toxicity standards, engine 2112;

08 - Euro-3 toxicity standards (EOBD), engine 2112;

13 - Russian toxicity standards, engine 2111;
16 - Euro-3 toxicity standards (EOBD), engine 2111.

Fourth rank

- letter (in the example - O) - indicates the software level (A ... Z); the further the letter is from the beginning of the alphabet, the older the software level.

Fifth rank

- two digits (in the example - 54) - indicates the calibration version (00...99); the larger the number, the newer the calibration.

Thus, the given software example stands for:
M1 - control unit (controller) BOSCH Motronic M1.5.4;
V - a family of front-wheel drive cars VAZ;
13 - 8-valve 1.5 liter engine 2111, Russian toxicity standards;
O - software version - O;
54 - calibration version No. 54.

By changing the calibrations, it is possible to achieve some improvement in the dynamic characteristics of the engine, a decrease in fuel consumption and toxic emissions in the FOG. To change the calibrations, there are special programs and devices for their implementation, and for different types of controllers, different methods have been developed for replacing "CHIP tuning" (adjusting the computer control program). As an example, in Table. 5 shows tuning firmware for BOSCH M1.5.4 ECU 1411020-70.

Component composition, functions, arrangement of ESAU-D elements on the example of the VAZ-2111 engine with the MP7.0 BOSCH controller

ESAU-D, equipped with an MP7.0 controller and installed on the VAZ-2111 engine, is similar in principle to the Motronic BOSCH system and belongs to ESAU-D with a combination of injection and ignition functions.

In addition to controlling the injection and ignition, ESAU-D controls the idle speed, the electric fuel pump, the purge of the adsorber of the gasoline vapor recovery system (SUPS), the Check Engine control lamp, the cooling system fan and the air conditioning compressor clutch (if installed). In addition, ESAU-D generates signals proportional to the vehicle speed and fuel consumption for the trip computer, as well as a signal about the engine crankshaft speed for the tachometer. The controller provides interaction with an external diagnostic device through a special connector located in the car. Domestic ESAU-D has a self-diagnosis function that allows you to fix the malfunctions that occur, identify them, save them in memory, and inform the driver by turning on the “Check Engine” warning lamp. Diagnostic information can be output from the ECU RAM via the diagnostic connector to an external scanner.

It should be noted that turning on the “Check Engine” lamp while driving does not require an instant stop of the engine, as, for example, in situations with an emergency loss of oil pressure in the lubrication system or an emergency overheating of the engine, but only indicates the need to check the engine in the near future. The ESAU-D controller has emergency modes that ensure engine operation in the event of many malfunctions, with the exception of the most severe ones, for example, when the crankshaft position sensor fails. It is possible to connect a car anti-theft protection system to ESAU-D.

Structurally, ESAU-D consists of a set of sensors, an ECU, a set of actuators and a wiring harness with connectors.

Electronic control unit (controller)

ECU is the central unit of ESAU-D. It receives analog information from sensors, processes it with the help of analog-to-digital converters, and implements control of actuators according to the program embedded in the ROM. Communication between the control unit and the electrical circuit is carried out via a 55-pin plug connector. The ECU is located under the instrument panel console (see Fig. 1).

The purpose of the contacts and some data for control are given in Table. 6.

Sensors ESAU-D (VAZ)
Mass Air Flow Sensor (DMRV)

The DMRV GM and BOSCH used in the VAZ ESAU-D differ in the shape of the cases and output signals. The GM sensor (HFM-5) generates a frequency signal for the GM and January-4 controllers, and the BOSCH sensor (HFM-5SL)
- analog signal for control units BOSCH and January-5.

A characteristic malfunction of the DMRV is a break in the wires from the sensor or a break in the platinum thread of the sensor itself. With such malfunctions, the idle speed rises to 2000 rpm. While driving in certain modes, detonation is possible.

When the sensor fails, it can occasionally give an incorrect signal (typical for frequency sensors), and this does not lead to the entry of a fault code into the controller's memory. In this case, even when driving without acceleration, large “dips” occur and the idling becomes unstable, which can lead to engine shutdown. ESAU-D in case of failure of the DMRV switches to the standby mode, calculating the air flow rate from the signal from the crankshaft position sensor DPKV (the signal contains information about the engine speed) and from the signal from the TPS. The malfunction is recorded in the memory with the corresponding error code (P0102-P0103) and is indicated by the “Check Engine” lamp.

Throttle Position Sensor (TPS)

The sensor is designed to determine the position of the throttle valve.

When the damper is in the closed position, the signal generated by the sensor is 0.5...0.6 V, in the open position - 4.5...4.8 V.

Data on the position of the throttle valve is necessary for the control unit to calculate the duration of the electric impulses for controlling the injectors and determine the optimal ignition timing.

Potentiometric TPS of VAZ injection engines usually fail due to wear of the conductive tracks of the resistive plate and incorrectly selected spring force pressing the resistive plate to the connector contacts.

Often come across defective Russian-made sensors, they give out an unstable signal with a voltage of 0.25 ... 0.7 V when the throttle is closed.

A sign of a faulty sensor is increased or floating idle speed. In the event of failure of the TPS, ESAU-D replaces it with a signal calculated from the crankshaft speed and the DMRV signal. The malfunction is recorded in the memory with the corresponding error code (P0122-P0123) and is indicated by the "Check Engine" lamp.

Coolant temperature sensor (DTOZH)

The temperature sensor is a negative resistance thermistor (R = 470 Ohm at 130°C and R > 100 kOhm at -40°C). The ESAU-D controller calculates the temperature of the coolant based on the voltage drop at the DTOZH, using its value in most engine control functions. In the event of failure of the DTOZH, ESAU-D calculates the temperature based on the engine operation time and the DMRV readings. A DTOZH malfunction is recorded in the memory with the corresponding error code (P0115, P0117, P0118) and is indicated by the “Check Engine” lamp. In table. 7 shows the data for checking the temperature sensor using a digital tester.

Knock sensor (DD)

The DD uses a sensitive piezoceramic element that generates an alternating voltage during vibration. The amplitude and frequency of the signal depend on the level of detonation in the engine, which allows the ESAU-D controller to appropriately correct the ignition timing to dampen the detonation that has occurred. You can check the DD using an oscilloscope: a properly working DD generates a sinusoidal signal with a duration of 4 ... 6 ms and an amplitude of 2.5 ... A malfunction in the DD path is recorded in the memory with the corresponding error code (P0327, P0328) and is indicated by the “Check Engine” lamp.

Oxygen concentration sensor

Modern injection systems are performed in two versions - with and without feedback. Feedback assumes the presence of a DCC (lambda probe) in the exhaust pipe and an exhaust gas catalytic converter. When the ratio of air and fuel in the air-fuel (TV) mixture is 14.7: 1 (this ratio is called stoichiometric), the catalytic converter most effectively reduces the amount of harmful substances (CO, CH, NOX) emitted with exhaust gases. To optimize the composition of the exhaust gases, in order to increase fuel efficiency and achieve the highest efficiency of the converter, control of the fuel supply in a closed loop with feedback using a signal to the DCC is used. The oxygen concentration sensor, the sensitive element of which is located in the exhaust gas stream, generates a signal in the form of a step change in voltage from 0.1 to 0.9 V (value 0.1 V - poor TV mixture; 0.9 V - rich TV mixture), with a transition through the average value of 0.45 V when the TB mixture is stoichiometric. Based on the data received from DCC, the ESAU-D controller changes the composition of the air-fuel mixture, maintaining it close to stoichiometric.

Serviceable and warmed up to operating temperature (more than 300°C) DCC generates a signal with a frequency of 1...5 Hz. A malfunction in the DCC path or a failure of the sensor itself is recorded in the memory with the corresponding error code (P0130, P0132, P0134) and indicated by the “Check Engine” lamp.

Vehicle speed sensor (DSA)

DSA consists of a stator with a Hall element and a rotor with a magnet. While the car is moving, the DSA generates a signal with a frequency of 6 pulses per 1 m of movement. The ESAU-D controller determines the speed by the pulse repetition rate of the DSA. A typical malfunction of the DSA is mechanical damage to the sensor, while the speedometer does not work and the “Check Engine” lamp lights up. One of the codes is stored in memory - P0500 or P0503. It should be noted that this failure does not affect the operation of the engine, which is sometimes used by unscrupulous owners, turning off the DSA to hide the real mileage of the car. On the example of the operation of a VAZ-21102 car, the average time between failures of a domestically produced DSA does not exceed 1.5 ... 2 years (or 20 ... 30 thousand kilometers).

Crankshaft position sensor (DPKV)

On VAZ-2110, 2112 vehicles with distributed gasoline injection, the DPKV is controlled from a special disk (sensor rotor) with 60 teeth, which are placed in 6-degree increments. For synchronization, two teeth are missing. The start of the synchronization countdown for the ESAU-D controller is the first tooth after two missed ones, while the crankshaft is in the position of 114 degrees before the top dead center (TDC) of the 1st and 4th cylinders. The toothed disk is located on the crankshaft pulley to drive the generator, and the DPKV is located on the oil pump cover. With a gap between the sensor core and the disc tooth of 1 ± 0.4 mm and a frequency of 30 ± 5 rpm, the minimum amplitude of the alternating voltage at the DPKV output must be at least 0.28 V. The resistance of a good sensor is 500 ... 700 Ohm. There are cases of loss of contact in the connector and breakage of the supply wires. The supply wires are shielded to protect against interference, a break in the shield can also lead to failures in the DPKV path.

A malfunction in the DPKV path or a failure of the DPKV itself is recorded in the memory with the corresponding error code (P0335, P0336) and is indicated by the “Check Engine” lamp, while the engine will not work.

Executive elements ESAU-D (VAZ)
Electric fuel pump (EBN)

In ESAU-D (VAZ), a turbine-type EBN is used (Fig. 9, 11).

The EBN is switched on by the controller via a relay. It is also possible to turn on the EBN through the diagnostic connector (by closing pins G and H between each other). The ESAU-D program provides automatic shutdown of the EBN if, 2 s after the ignition or starter is turned on, the engine crankshaft does not rotate. Different instrument panels are mounted on Samara cars with fuel gauges that differ from each other. In this regard, fuel level sensors (located on the fuel pump monoblock) also exist in two versions:
21083 (with a high instrument panel), sensor resistance 0.25 Ohm - with an empty tank and 20 kOhm - with a full one;
2112 (for cars with "torpedo" 2108, 2110 and 2115). EBN assembled with a sensor for VAZ vehicles with a high panel have a yellow installation mark in the arrow zone (when installing the EBN, the arrow should look back) and for a low one - without a mark or with a black mark. The EBNs themselves are the same and if they are accidentally confused, then there will be incorrect fuel level readings, but the engine will work normally.

fuel injectors

Fuel injectors (see Fig. 10, 11) are electromagnetic devices and are used to inject gasoline into the intake valves of the calculated amount of fuel by the ECM. The MP7.0 BOSCH controller uses an injector driver with a self-diagnostic function. It detects faults for open circuit, short circuit to ground or defects in the power supply of the injector control circuits. In this case, error codes P0201, P0202, P0203, P0204 are generated and the “Check Engine” lamp turns on. A malfunction of this nature is easily diagnosed using a multimeter by checking the resistance of the winding of each injector (11 ... 15 ohms), the connecting harness is less than 1 ohm.

Nozzles from various manufacturers (BOSCH, GM or domestic) are interchangeable in terms of internal resistance and seats. It is better to change the injectors as a set, since their fuel atomizers are different. Nozzles from Russian manufacturers and BOSCH are less susceptible to corrosion and, accordingly, last longer. Hard resinous deposits develop over time on the nozzle seats and at the ends of the shut-off elements, the main cause of nozzle failure. As a result, the following symptoms appear: difficult starting, erratic idling, acceleration dips, increased fuel consumption, loss of power and engine “triple”. Therefore, especially for engines with a mileage of more than 100 thousand km, it is recommended to clean the injectors. Inomotor specialists conducted a comparative analysis of the effectiveness of various solvents and devices for cleaning nozzles and came to the conclusion that all devices are similar in design, their capabilities and differ only in price. But for cleaning solvents, the effectiveness is different. The solvent concentrate of the American company Carbol Clean turned out to be the best. According to the opinions of firms from Angarsk, Krasnodar, Moscow, Novosibirsk, Togliatti, this concentrate is significantly (on average 15 ... 20%) more effective than others. Accordingly, its consumption is less and cleaning is faster.

Ignition module (MZ) with candles

In the ESAU-D (VAZ) ignition system, an MZ is used, consisting of a 2-channel electronic switch and a pair of two-pin ignition coils (see "Repair & Service" No. 6, 2003, Fig. 11 on p. 62). The ignition system provides detonation damping according to a special algorithm using DD. The ignition system has no moving parts and therefore requires no maintenance. In the event of a malfunction of any element of the MH, it is necessary to replace the entire assembly. The signs of a malfunction of the MZ are varied: from interruptions in the operation of the engine in certain modes to its stop. The control lamp does not light up. To diagnose a malfunction in the ignition system, it is necessary to check the presence of power supply to the MZ (terminal "D" - power +12 V, terminal "C" - common), the presence and serviceability of the connection between the controller and the MZ (terminal "B" MZ - terminal 1 controller and terminal "A" MZ - terminal 21 of the controller) and the resistance of high-voltage wires (approximately 15,000 Ohm).

Domestic MZ 42.3705 consists of two ignition coils with two high-voltage outputs and a 2-channel switch, assembled in one monoblock and filled with a compound (Fig. 12).

Until April 1999, the modules were filled with a silicone compound, which did not adhere well to the parts and was not ductile enough. When heated, the silicone exfoliated from the body of the monoblock and moisture entered the cracks, after which the module failed.

Since April 1999, polyurethane has been used instead of silicone compound. After that, the number of MOH failures decreased by 80%. MZ, produced by the Moscow plant MZATE-2 (formerly ATE-2), is used with BOSCH and January-5 controllers. This module is not suitable for control systems with GM and January-4 blocks.

The ignition system of the VAZ-2111 engine is equipped with A-17DVRM candles (or equivalent) with an interference suppression resistor with a resistance of 4 ... 10 kOhm and a copper core. The gap between the electrodes is 1.00...1.13 mm. The VAZ-2112 engine is equipped with AU-17DVRM spark plugs, which can also be used on the VAZ-2111 engine. Based on the operating experience of VAZ-21102 cars, the average time between failures of domestic-made spark plugs is 1-1.5 years (or 20-30 thousand kilometers).

Idle speed regulator (IAC)

IAC (Fig. 13) is installed in the bypass (bypass) air supply channel of the throttle pipe and regulates the crankshaft speed at idle with the throttle closed (see diagram in Fig. 11), while it helps to reduce exhaust emissions. During engine braking, when the throttle closes abruptly, the IAC increases the amount of air supplied to bypass the throttle, thereby providing a lean TV mixture. It also provides a reduction in exhaust emissions.

It should be noted that incorrect engine idling is not always associated with a failure of the IAC. Engine idle problems can be caused by:
lean TV mixture;
re-enriched TV mixture;
defective throttle pipe;
improper operation of the crankcase ventilation system;
clogged air filter;
air suction in the intake manifold.

Only after eliminating all these problems should you deal with the IAC. Checking the IAC in the absence of a special tester is very problematic. The only thing that can be done is to ring the IAC windings for an open and short circuit (the resistance of the windings should be 40 ... 80 Ohms) and inspect it for obvious defects. Based on the operating experience of VAZ-21102 vehicles, the average time between failures of domestically produced IAC (2112-1148300-82) is 1.5-2 years (or 40 ... 50 thousand kilometers). Failure of the IAC, detected by the diagnostic system, is recorded by error codes P0506, P0507 and the “Check Engine” lamp is turned on.

Diagnostics ESAU-D (VAZ)
Self-diagnosis function

ESAU-D (VAZ), like the Motronic system, has a built-in self-diagnostics function, through which the ECU compares the signals generated by the sensors and the signals received by the actuators with the standard values ​​\u200b\u200bof these signals, which are stored in the permanent memory of the ECU . Detected faults and their corresponding mode parameters are entered into the controller's memory. This data can be analyzed during maintenance using diagnostic equipment connected to a standard diagnostic socket.

To promptly inform the driver about errors in the operation of ESAU-D, the VAZ instrument cluster has a “Check Engine” warning lamp. If this error occurs in the system for a short time, and then does not appear for a long time, then after some time the lamp goes out (however, the diagnostic trouble code is stored in memory). If the error does not disappear, then the lamp lights up constantly, reminding you of the need for diagnostics. Clearing the memory from the recorded error codes is done either by disconnecting the controller from the power source for at least 10 seconds, or using special diagnostic equipment.

Diagnostic code (DC) of malfunction, code tables

AvtoVAZ strives to maintain the compatibility of fault codes with the ODB-II (SAE / MFG) standard. Although not all codes are supported, their number is gradually growing.

The ODB-II error code format is as follows:
The first letter in the code means the vehicle system in which the malfunction occurred: B - Body (body), C - Chassis (chassis), P - Powertrain (power unit), U - Network (on-board network).
The first digit in the code indicates the authorship of the error: if "0", then this is SAE (J2012); if "1", then it is MFG (a specific code that is needed for the car manufacturer).
The second digit in the code means the subsystem and stands for:
1 - air-fuel subsystem of the engine (Fuel and Air Metering);
2 - fuel-air subsystem of the engine (injection circuit) Fuel and Air Metering (Injector Circuit);
3 - ignition and failure subsystem (Ignition Systems or Misfire);
4 - auxiliary subsystem of emission control (Auxiliary Emission Controls). Should appear in the VAZ ECU with the transition to Euro-3 emission standards;
5 - subsystem for regulating the engine speed, speed and idling (Vehicle Speed ​​Control and Idle Control System);
6 - computer output circuits (Computer Output Circuit);
7 - transmission (Transmission).

The last two digits mean the fault code itself.
In table. 8 shows the diagnostic trouble codes that are supported in the controllers
AvtoVAZ (the codes used by the BOSCH MP7.0 controller are in bold).

Methods and practices for reading diagnostic codes (DC)
Reading the DC with the "Check Engine" lamp

This method is applicable to GM and January-4 controllers. BOSCH controllers can only be interrogated using diagnostic equipment.

In order to read fault codes using a warning lamp, it is necessary to close contacts A and B of the diagnostic connector (see Fig. 11) and turn on the ignition without starting the engine. At this point, the "Check Engine" lamp should flash code 12 three times in a row. The code display sequence is as follows: turning on the lamp, a short pause, two turns on in a row, a long pause, and so on two more times. Code 12 is not a fault code, it indicates that the self-diagnosis system is operational. If code 12 is missing, the self-diagnosis system is faulty.

After issuing code 12, the "Check Engine" lamp will begin to issue fault codes previously detected and recorded in RAM in ascending order of their number. Each code is issued three times. And so in a circle. If no faults are found, only code 12 will be issued.

Reading DC using special diagnostic equipment

1. Tester DST-2 or similar foreign-made tester.

The scanner-tester of the Samara NPP "New Technological Systems" DST-2 and its modifications, which appeared in 1995, provide ample opportunities for diagnosing ESAU-D (VAZ). In addition to monitoring the current parameters of the ESAU-D, checking sensors and actuators, the scanner-testers of the DST family allow you to monitor and record the state of the ESAU-D in dynamics, which helps in finding intermittent faults. The only drawback of DST scanner-testers is their high cost.

2. Trip computer (MK) with a diagnostic function.
There are many variants of MK, however, only the on-board computers of the Kursk OJSC "Schetmash" have an AVTO-VAZ certificate and are supplied to the conveyor for luxury vehicles. These are AMK-211000 for cars of the tenth series and AMK-211500 - for installation on all VAZ small cars. The available MCs are not much inferior in their capabilities to scanner-testers, for example, DST-4M, but the cost of these devices is even higher.

3. Personal computer with a special (software-hardware) communication interface.
This method of reading codes, both in terms of the cost of implementation and the diagnostic capabilities provided, is the most applicable in "home" conditions. Indeed, free diagnostic programs distributed on the Internet (the author used "Mytstr R12") and adapters (see the website http://www.autoelectric.ru/) provide ample opportunities for diagnosing ESAU-D (VAZ). The main advantage of a computer over a tester is the convenience of saving test results. In order to save the results, just click on the "Record" button, specify a file name and, if necessary, add a comment. In the future, it is enough to compare the obtained parameters with the standard parameters of a serviceable ESAU-D and draw the necessary conclusions.

Upon completion of the repair and to control the reappearance of the DC, it is necessary to clear the controller's memory. There are two ways to erase fault codes from the ECU memory. Codes can be erased using diagnostic equipment, as well as by disconnecting the control unit from the battery for 30 seconds.

General Approach to Troubleshooting in ESAU-D

The condition for the normal operation of all ESAU-D components is the working condition of all mechanical, pneumatic and hydraulic systems of the engine. Therefore, before starting the ESAU-D diagnostics, it is necessary to check:
working condition of the cylinder-piston group (measured on a warm engine, the compression in all cylinders must be at least 10 kg/cm2);
tightness of the intake and exhaust manifolds;
correct installation of the gas distribution phases;
serviceability of the fuel system (normal pressure in the fuel system should be 2.5 ... 3.5 bar);
the state of the power supply means (the voltage in the on-board network with the engine running should be 13.2 ... 14.7 V and should not fall below 8 V at start-up).

ESAU-D has a number of operating parameters, compliance with the normative value of which determines the operability of the system as a whole. Their verification is carried out using an oscilloscope, a digital multimeter and a stroboscope. Note that some of the parameters can only be checked with the engine running. Therefore, at the first stage of diagnosis, it is necessary to start the engine and correctly assess the condition of all ESAU-D components.

An ideal prerequisite for the correct diagnosis of ESAU-D is the appearance of a diagnostic trouble code. Although the DC does not always accurately indicate the root cause of the malfunction. More often, DC indicates a consequence of what happened. And only a detailed analysis, verification of the ESAU-D parameters questioned, helps to find a malfunction.

A large number of electronic devices in a modern car requires the owner to have special knowledge and techniques in operation and maintenance. You need to know the following features of operating a car with ESAU-D in order to properly maintain and repair your car.

1. You can de-energize the computer not earlier than 30 seconds after turning off the engine, otherwise the information from the RAM will be erased in it. In order to recover the lost information, it is necessary to start the engine and let it warm up to operating temperature. After starting the engine, the Check Engine indicator lamp will light up for a while, which is not a malfunction.

2. On all VAZ injection engines, after an unsuccessful attempt to start (more often this happens at air temperatures below -25 ° C), “flooded” candles can be dried by turning on the purge mode. To do this, gently press the gas pedal and turn on the starter for 5 ... 10 s. For the ECU, such actions will be a signal to turn off the fuel supply.

3. All controllers are made in such a way that at an ambient temperature of up to +25°C they remain operational at a supply voltage of 18 V for two hours. At a voltage of 24 V, they are guaranteed to remain operational for at least five minutes. There have been no cases of controller failure due to increased voltage in the on-board network, even in the event of a voltage regulator failure.

4. Car controllers of the "tenth" series are compatible with the on-board computer 2111-3857010 (16.3857). The control units that are installed on the Samara-2 vehicle are compatible with the on-board computer 2114-3857010 (15.3857).

5. In order to block the engine start when installing a security alarm on injection engines of VAZ vehicles with M1.5.4 or January 5.1 type controllers (not applicable to MP7.0 is marked with *), it is permissible to “break” any of the following wires:
ignition module control;
fuel pump control;
nozzle control;*
a wire connecting the 15th terminal of the controller (ignition signal to the engine management system) with an 18-terminal block;
"positive" or "mass" wire of the fuel pump relay; *
close to each other or short to ground the wires of the inductive sensor. In addition, it is possible to close the wires (signal and power) of the throttle position sensor through a resistor with a nominal value of 680 Ohm - 1 kOhm. *

If the conductors supplying the ignition module or injectors break, it is necessary to use breakers that can withstand a current of at least 3 A, and the wires of the fuel pump power circuit - at least 10 A.

Troubleshooting using the example of a VAZ-2111 engine with a BOSCH MP7.0 H controller

Beforehand, it is necessary to check the operating parameters of ESAU-D, which can be measured on a non-working engine (see Table 8).

To start the engine you need:
the presence of fuel in the tank and a normally working fuel pump;
proper ignition;
so that the DPKV is serviceable;
so that the injectors work (failure of all injectors is unlikely);
so that the controller is working (although its breakdown, even for domestic cars, is unlikely).

The electric fuel pump (EBN) is checked by a characteristic sound. Also, when the computer is turned on, gasoline pressure should appear in the fuel line (2.5 ... 3 bar). After turning off the pump, the pressure in the system should not drop rapidly. If it drops, then the fuel pressure regulator valve is most likely defective. For a short time, it can be muffled by not completely pinching the tube (for example, with a suitable clamp) of the return gas line, thus creating the necessary pressure in the system. If the EBN is "silent", the presence of +12 V is checked on the pump block and further along the circuit (see Fig. 11).

Ignition can only be checked if the spark plugs are securely connected to ground, otherwise it is easy to disable the control unit. To diagnose a malfunction in the ignition system, it is necessary to check the presence of power to the MZ (pin D +12 V, pin C - common, see Fig. 11), the presence and serviceability of the connection between the controller and the MZ (lines B - pin 1 of the ECU and A - pin 21 of the ECU), check the resistance of the high-voltage wires (about 15 kOhm).

First, inspect the DPKV for damage to the wire and screen. DPKV is the only node in ESAU-D, without which the engine will not work. The resistance of a good sensor is 500-700 ohms. The amplitude of the alternating voltage measured at the DPKV (cont. 48, 49 of the ECU, see Fig. 11) when the engine is scrolled by the starter is 1 ... 2 V. There are cases of loss of contact in the connector and breakage of the supply wires. The supply wires are shielded to protect against interference, a break in the shield can also lead to malfunctions of the MZ. The design of the crankshaft pulley has a rubber damper, due to poor vulcanization, the rubber sometimes peels off one of the pulley discs and they are displaced. As a result, the pulses to the injectors and ignition do not arrive on time. In this case, the engine will also not work.

The electrical resistance of the injectors is checked with an ohmmeter. It should be 12 ... 15 ohms in each nozzle. The wire resistance in the connection harness is less than 1 ohm.

The controller (ECU) is checked for power at the disconnected and non-disabled inputs (terminals 18 and 37, see Fig. 11). If there is no power, the main relay, fuse and fuses X, Y and Z are checked.

If the engine does not start well in cold weather (at an ambient temperature of less than -20 ° C), you can turn the engine over with the starter pressed on the gas pedal (in this case, fuel will not be supplied) which will allow the cylinders to be purged. After releasing the pedal, you can try to start again. If this succeeded, then either the IAC is faulty, or one of the sensors (most likely DTOZH). But the cause of a poor start can also be low fuel pressure, due to a malfunction of the fuel pump or fuel pressure regulator valve.

Also, the throttle position sensor (TPS) can prevent starting. If the voltage on it is about 3.4 V, then it will probably fail to start. It can be turned off or shunted, providing a voltage of 0.1 ... 0.2 V on it.

In some cases, an emergency option for starting the engine is possible, when all sensors are disconnected from the computer, except for the DPKV, and an attempt is made to start again. In this case, the engine can start if the initial position of the gas pedal is empirically determined.

If it started up, then now it is necessary to check the parameters of the ESAU-D and its elements (see Table 9).

The use of diagnostic codes (DC) when troubleshooting ESAU-D

After the engine is started and warmed up by any of the available methods, diagnostic trouble codes are read, having previously checked the operability of the diagnostic circuit. How to do this is described in the instruction manual for the particular tester. If it is a scanner-tester or an IBM PC-software tester, then it is possible to check the entire ESAU-D periphery (actuators and sensors) and conduct various dynamic tests. The resulting DCs must be analyzed in order to establish a causal relationship of what is happening in the ESAU-D.

Before checking, the following conditions must be met:
the engine is warmed up to operating temperature;
the engine runs at low idle;
the diagnostic contact is not shorted to ground;
DST-2 device (or similar) is not connected;
the air conditioner (if any) is turned off;
the negative terminal of the digital voltmeter is securely connected to ground.

In table. 10 shows diagnostic codes, possible faulty electrical circuits, as well as additional manifestations of identified malfunctions.

In the columns "voltage" and "possible signs of a circuit malfunction" of this table, the following designations are accepted:
(1) - below 0.1 V during the first two seconds after turning on the ignition without cranking the engine;
(2) - below 1 V or above 10 V, depending on the position of the driving wheels of a stationary vehicle. When driving, the voltage changes with speed;
(3) - changes depending on temperature;
(4) - varies depending on the vibration level of that part of the engine on which the knock sensor (DD) is installed;
(5) - varies depending on the engine speed;
(6) - voltage on the battery (V +) when the engine is warm;
(7) - break;
(8) - open/short circuit;
(9) - the circuit is closed to ground;
(10) - the circuit is closed to +12 V;
(11) - varies in the range from the battery voltage to a voltage of less than 1 V, depending on the duty cycle of the pulses;
(12) - when the relay is on, less than 0.1 V, and when the relay is off, it is equal to the battery voltage;
(13) - when the control lamp is on, the voltage is less than 0.5 V, when the contact is off, the battery voltage appears on the contact;
(14) - decreases with increasing duration and frequency of injection pulses;
(B+) - must be equal to the battery voltage.

The wire color (2nd column), marked P (magenta), corresponds to the designation KR (red).

The concept of hidden faults ESAU-D

Some ESAU-D malfunctions may be implicit or hidden. This may be due, for example, to a short-term change in the characteristics of the ESAU-D components, which lead to errors in the system. Some motor testers have a special mode that allows you to record changes in the ESAU-D parameters for a certain time to clarify the source of a "floating" malfunction. In DST-2, for example, this mode is called "data collection".

In table. 11 shows the parameters of ESAU-D (VAZ) with the BOSCH MP7.0 controller (recorded using DST-2), which can be used for diagnostics in the absence of a DC malfunction.

№6 "Repair & Service" June 2003

Diagnostics of VAZ cars

Section 2 - "Diagnostics" consists of the following parts:

General Information

Information about the procedure for conducting diagnostics, safety measures and the diagnostic device DST-2M. It also provides a description of the electrical connections of the engine management system and the assignment of the controller connector pins.

Part "A" and diagnostic cards "A"

Provides an introduction to diagnostic procedures, including "DIAGNOSTIC CIRCUIT CHECK", diagnostic cards for the malfunction indicator, what to do if the engine cannot be started, and other general cards.

Fault code cards

These maps are used if, when checking the diagnostic circuit, a fault code stored in the controller's memory is detected. If more than one code is present, analysis and troubleshooting should always be started with codes P0560 (incorrect electrical system voltage) or P0562 (low electrical system voltage).

Part "B". Diagnostic cards of malfunctions.

In the absence of a DTC or if it is inconsistent, this part helps the mechanic to determine the malfunction. In these cases, the diagnosis must also begin with a test of the diagnostic circuit.

Part “C” and diagnostic cards “C” (cards for checking engine control system components).

This part contains information on checking specific elements of the engine management system, as well as on their maintenance. It contains information on the elements of the fuel supply system, on the ignition system, etc.

General information

Diagnostics of the engine management system with distributed fuel injection is quite simple, provided that the procedure is followed.

Diagnostics does not require special knowledge in the field of electronics and computer technology. Enough knowledge of the basic concepts of electrical engineering and the ability to read simple electrical circuits. In addition, you must have experience with a digital multimeter. Of course, a good understanding of the fundamentals of engine operation is essential.

The first and most important condition for successful troubleshooting of any system is understanding how it works. Before carrying out repairs, it is necessary to clearly understand how a good condition differs from a faulty one.

Familiarization with section 1 of the "Installation and repair" manual is a good start for understanding the operation of the system and its elements under normal conditions.

Diagnostic descriptions and diagnostic charts mention certain diagnostic tools (see Appendix 2). These diagnostic tools are used for specific purposes, and diagnostic cards describing the procedure for diagnosing are built on the basis of the use of these tools.

Speaking of diagnostic tools, it is important to remember that none of the special diagnostic tools can replace a person. The tool and diagnostic tools do not perform diagnostics for a person and do not exclude the need for diagnostic cards and a description of the diagnostic procedure.

We should not forget that behind the electronics is the basic internal combustion engine. The performance of the engine management system depends on the health of the mechanical systems.

As a reminder, below are a number of anomalies that can be misattributed to the electronics of the engine management system:

Insufficient compression;

Air suction;

Restriction of the patency of the exhaust system;

Deviations in the valve timing caused by wear of parts and improper assembly;

Poor fuel quality;

Failure to meet maintenance deadlines.

2.2 Precautions for VAZ car diagnostics

When working on a vehicle, the following requirements must be observed.

1. Before dismantling the controller, it is necessary to disconnect the ground wire from the battery.

2. It is not allowed to start the engine without a reliable connection of the battery.

3. It is not allowed to disconnect the battery from the on-board network when the engine is running.

4. When charging, the battery must be disconnected from the on-board network.

5. It is necessary to control the reliability of the wire harness contacts and keep the battery terminals clean.

6. The design of the engine management system wiring harness blocks is designed to mate only in certain orientations.

With the correct orientation, the articulation is effortless. A joint with the wrong orientation can lead to failure of the block, module, or other element of the system.

1. Articulation or dismemberment of blocks of ECM elements is not allowed when the ignition is on.

2. Before carrying out electric welding, it is necessary to disconnect the wires from the battery and the connector from the controller.

3. To prevent contact corrosion, when cleaning the engine with a jet of water under pressure, do not direct the sprayer at the elements of the system.

4. To eliminate errors and damage to serviceable units, it is not allowed to use control and measuring equipment that is not indicated in the diagnostic cards.

5. Voltage measurements should be carried out using a digital voltmeter with a nominal internal resistance of more than 10 MΩ.

6. If it is planned to use a probe with a control light, it is necessary to use a low power lamp (up to 4 W). The use of high power lamps, for example, from a headlight, is not allowed. If the power of the probe lamp is not known, it is necessary, by a simple test of the lamp, to make sure that it is safe to use it to control the controller circuits.

To do this, it is necessary to connect an accurate ammeter (digital multimeter with low resistance) in series with the probe lamp and supply battery power to the lamp-ammeter circuit (Fig. 2.2-01).

If the ammeter shows a current less than 0.25 A (250 mA), the lamp is safe to use. If the ammeter shows a current greater than 0.25 A, the use of a lamp is dangerous.

7. The engine management system uses a controller with an 81-terminal connector, which is located in a hard-to-reach place. Since the terminals inside the connector blocks are not available for connecting external measuring instruments, it is necessary to use special signal splitters (Fig. 2.2-02) connected between the controller and the wiring harness to check the integrity of the injection system harness circuits.

8. Electronic devices of the engine control system are vulnerable to electrostatic discharges, therefore, care must be taken when working with them, especially with the controller.

ATTENTION. To prevent damage from electrostatic discharge, do not disassemble the metal case of the controller and touch the connector plugs.

2.1 Description of the on-board diagnostics

The “on-board diagnostics” refers to a system of software and hardware (controller, sensors, actuators) that performs the following tasks:

1) definition and identification of errors in the functioning of the ECM and the engine, which lead to:

Exceeding the limit values ​​​​for the toxicity of exhaust gases of cars, which are determined by the currently valid environmental standards for cars in the respective country;

To a decrease in engine power and torque, an increase in fuel consumption, a deterioration in the driving qualities of a car;

To the failure of the engine and its components (burning of the pistons due to detonation or damage to the catalytic converter in the event of misfiring of the air-fuel mixture).

2) informing the driver about the presence of a malfunction by turning on the malfunction indicator.

3) saving information about the malfunction. At the time of detection, the following information is entered into the controller's memory:

Malfunction code according to the international classification (see Table 2.3-01);

Status flags (symptoms) characterizing the malfunction at the time of the information exchange session with the DST-2M diagnostic device;

The so-called freeze frame - the values ​​​​of parameters important for the ECM at the time the error was registered.

Fault codes and related additional information make it much easier for specialists to troubleshoot and troubleshoot the engine control system.

4) activation of emergency modes of operation of the ECM. When a malfunction is detected, the system switches to emergency modes of operation to prevent negative consequences (listed above). Their essence lies in the fact that in the event of a failure of any sensor or its circuit, the controller uses replacement values ​​stored in the PROM to control the engine. In this case, the car will be able to drive to the service station.

5) ensuring interaction with diagnostic equipment. The presence of a malfunction is reported by the on-board diagnostics system by turning on the signaling device. Then the on-board diagnostic system must provide, using special equipment, the receipt of diagnostic information stored in the controller's memory. To do this, a serial information transmission channel is organized in the engine control system, which includes an ECM controller (in the role of a transceiver), a standardized block for connecting a diagnostic tool (Fig. 2.3-01, 2.3-02) and a wire connecting them (K- line). In addition to the block, the information transfer protocol and the format of the transmitted messages are also standardized. In addition to obtaining information about the detected malfunctions and the state of the engine management system, the on-board diagnostics system allows you to perform a number of verification tests by controlling the actuators.

ATTENTION. If an immobilizer is not installed on the car, then in order to diagnose the engine management system using the DST-2M device, it is necessary to connect the contacts "18" and "9" to each other in the block connected to the immobilizer control unit.

The main component of the on-board diagnostics system is the ECM. In addition to its main task (management of the combustion processes of the fuel mixture), it carries out self-diagnosis.

When performing this function, the controller monitors the signals of various sensors and actuators of the ECM. These signals are compared with control values ​​stored in the controller's memory. And if any signal goes beyond the control values, then the controller evaluates this condition as a malfunction (for example, the voltage at the sensor output has become equal to zero - a short circuit to ground), generates and writes the corresponding diagnostic information to the error memory ( see above), turns on the malfunction indicator, and also switches to emergency modes of operation of the ECM.

The on-board diagnostic system begins to function from the moment the ignition is turned on and stops after the controller switches to the “stand by” mode (comes after the main relay is turned off). The moment of activation of one or another diagnostic algorithm and its operation are determined by the corresponding engine operating modes.

Diagnostic algorithms can be divided into three groups:

1) Diagnostics of sensors. The controller, tracking the value of the output signal of the sensor, determines the nature of the fault,

2) Diagnostics of the ECM actuators (driver diagnostics). The controller checks the control circuits for an open, short to ground, or power source.

3) Diagnostics of ECM subsystems (functional diagnostics).

In the engine management system, several subsystems can be distinguished - ignition, fuel supply, idle speed maintenance, exhaust gas aftertreatment, gasoline vapor recovery, etc. Functional diagnostics gives a conclusion about the quality of their work. In this case, the system no longer monitors individual sensors or actuators, but the parameters that characterize the operation of the entire subsystem as a whole. For example, the quality of the ignition subsystem can be judged by the presence of misfires in the combustion chambers of the engine. The fuel adaptation parameters provide information about the state of the fuel supply subsystem. Each of the subsystems has its own requirements for the maximum allowable deviations of its parameters from the average values.

Fault indicator

The malfunction indicator for VAZ-11183, 21101 cars is located in the instrument cluster.

Turning on the signaling device signals to the driver that the on-board diagnostic system has detected a malfunction of the ECM and further movement of the car occurs in emergency mode. In this case, the driver is obliged to place the vehicle at the disposal of the service technicians as soon as possible.

A flashing warning light indicates a malfunction that can lead to serious damage to the ECM components (for example, misfiring can damage the catalytic converter).

When the ignition is turned on, the indicator should light up - this is how the ECM checks the serviceability of the lamp and control circuit. After starting the engine, the indicator should go out if the controller memory does not contain the conditions for turning it on.

To protect against random, short-term errors that may be caused by loss of contact in electrical connectors or unstable engine operation, the warning lamp turns on after a certain period of time after detecting an ECM malfunction. During this interval, the on-board diagnostic system checks for a malfunction.

After eliminating the causes of the malfunction, the signaling device will turn off after a certain delay time, during which the malfunction does not appear, and provided that there are no other fault codes in the controller’s memory that require the signaling device to be turned on.

When clearing (deleting) fault codes from the controller's memory using diagnostic equipment, the indicator goes out.

The procedure for diagnosing VAZ cars

All diagnostic work must always begin with "Diagnostic Circuit Check"

The diagnostic circuit check provides an initial check of the system and then refers the mechanic to other manual cards. It should be the starting point of all work.

The entire manual is built according to a single scheme, in accordance with which the check of the diagnostic circuit sends the mechanic to certain cards, and those, in turn, can send to others.

It is necessary to strictly adhere to the sequence indicated in the diagnostic cards. Violation of the diagnostic sequence can lead to incorrect conclusions and replacement of serviceable units.

Diagnostic cards are based on the use of the DST-2M diagnostic device. It provides the mechanic with information about what is happening in the engine control system.

The DST-2M device is used to control the ECM. The DST-2M device reads and displays the information transmitted by the controller to the diagnostic block.

Checking the diagnostic circuit

After inspecting the engine compartment, the first step in all diagnostics or finding the cause of non-compliance with toxicity standards is to check the diagnostic circuit, described in section 2.7A.

The correct procedure for diagnosing a malfunction involves the following three basic steps:

1. Checking the performance of the on-board diagnostic system. The test is carried out by performing a diagnostic circuit test. Since this check is the starting point for diagnosing or searching for the cause of non-compliance with toxicity standards, you must always start with it.

If the on-board diagnostics are not working, the diagnostic circuit check outputs to a specific diagnostic card. If the on-board diagnostics are working properly, go to step 2.

2. Checking for current fault codes. If there are actual codes in the controller's memory, it is necessary to refer directly to the diagnostic cards with the corresponding numbers. If there are no codes, go to step 3.

3. Control of the data transmitted by the controller. To do this, it is necessary to read the information using the DST-2M device.

The description of the device and the parameters displayed by it are given below. Typical parameter values ​​for specific operating conditions are given in Table 2.4-01.

You can find error codes for malfunctions of VAZ 2110, VAZ 2112, VAZ 2114, 2115, Lada viburnum, Priora

Diagnostic cards of VAZ cars

On all injection cars VAZ 2110, 2111 and 2112 there is such a function as self-diagnosis of the instrument cluster and even the identification of certain errors with the provision of codes on the display.

To start this function, it is necessary to hold the button for resetting the daily mileage and turn on the ignition of the car. So that you don’t think for a long time what and how to do, I advise you to watch a detailed video review that I recorded for this topic. The video was made using the VAZ 2112 as an example.

As for the decoding of errors, I will try to make a textual description of them below, so that it is more visual and accessible to everyone.

Error codes for the VDO combination on the instrument panel VAZ 2110

• If 0 remains, then there are no errors.
• When 1 appears, it indicates a malfunction of the microprocessor
• Open circuit of the fuel gauge sensor
• Error 4 - increased voltage of the on-board network over 16 Volts
• Error 8 - undervoltage, less than 8 volts
• In case of several malfunctions, a digit can be issued at the same time, which will be the sum of the above codes, for example 6 (2+4), 10 (2+8), 12 (4+8) or 14 (2+4+8)

Frankly speaking, these fault codes do not bring much utility. When compared with the readings of special on-board computers, such as STAT, then there is, of course, dozens of times more useful information and various data. But we will talk about this sometime in the following articles.

Vaz 2112 16 valve, during self-diagnosis it gives an error 818.2 ... help save what is being done)

Hello, VAZ 2112 stopped starting, it shows error 43210 on the on-board computer

Who can tell me what error number 8 is?

1 Microprocessor error

2 Fuel gauge sensor circuit error

4 Large voltage

8 Low voltage

12 Check lamp diagnostic circuit failure

13 No oxygen sensor signal/LAMDA probe

14 High coolant temperature sensor signal

15 Low coolant temperature sensor signal

16 Increased voltage of the on-board network

17 Reduced voltage of the on-board network

19 Incorrect crankshaft position sensor signal

21 Throttle Position Sensor High

22 Throttle Position Sensor Low

23 Intake air temperature sensor signal high

24 No vehicle speed sensor signal

25 Intake air temperature sensor signal low

27 CO potentiometer signal high

28 CO potentiometer signal low

33 High signal mass air flow sensor

For GM NIVA: High signal level of the absolute pressure sensor

34 Low signal mass air flow sensor

For GM NIVA: Low absolute pressure sensor signal

35 Idle speed deviation

41 Wrong phase sensor signal

42 Electronic ignition control circuit malfunction

43 Wrong knock sensor signal

44 Lean mixture

45 Enriched mix

49 Diagnosis of vacuum loss

53 CO potentiometer sensor signal missing

For GM NIVA: increased voltage

54 No octane corrector sensor signal

55 Leaning at high engine load

For GM NIVA: error of the electronic control unit

61 Oxygen sensor/LAMDA probe degradation

Errors persist until they are reset manually!

Also errors add up! Those. you have errors 8 and 14, error 22 will be displayed.

Please help, I stood warming for about five minutes, suddenly the car stalled itself, then it started up, then, too, at first Troila played at speeds from 1000-1500 and again stalled, but as soon as you press the gas it immediately stalls

The crankshaft sensor or the crankshaft itself can also be the crankshaft gear

Hello, I do everything as in the video, but the diagnostics are not performed, it just switches the mileage to the daily one and that's it.

Sergey, press this button on the panel and keep turning while the ignition key will show everything there

Did you put a relay on the starter? They have this disease, when the mafon or lighting is on, it does not turn.

Car VAZ 2112 07 g 1.6 8 cells. After starting the engine on a cold one, it starts to swarm and for sorrows a check! I turn off, I start everything perfectly. The flight attendant writes errors 4 and 8.

Hello, error 8 vaz 2112 1.6 16kl is on.

Often the CHECK lights up after 3-4 minutes of work, and then after 10-15 minutes it goes out. I tried to look at the error code - “0” is displayed all the time. There is no noticeable difference in sound and traction. Car - Lada 111, 8 valves, injector. Passed 60 thousand km. Gasoline A92 at the OKKO gas station.

Vaz 2115i 2001, please tell me why I don’t see errors during self-diagnosis from the LCD panel, this is after all the tests that the system conducts (raising the arrows, indicator lamps, etc.), after which you need to press the reset button again, the version number and then errors are displayed, but nothing is there, even though check is on. Help someone who knows or has encountered a similar situation. Thank you!

Vaz 2112 16th cell. Starts norms, does not pull at all, I press the gas, it is more than 1500 one and a half thousand. does not gain momentum starts troit.

The timing belt seems to be all risky. The injectors looked clean.

I do not know what to do…

Try to look at the fuel pump or the sensors on it.

I had this on a vaz 2111 engine model 2112. in general, it gained momentum up to 2.5 and started to troit. brain problem. brainwashed and all. but I was told brains can die. but I got lucky.

hello umena eu car citroen c5 2003 burns sweetheart check please tell me how to quit

Brains to yourselves so that you can write in Russian.

Go to school first, learn a little)))

Good afternoon. tell. starts up well. on the turn works cleanly. I release the throttle pedal (gas) and the engine speed does not immediately drop. and sometimes idle floats

VAZ 2112 temperature warms up to 50-60 degrees and stalls and starts only after 3 hours. The computer shows error 27 and 31, what can this mean, please tell me.

It's most likely the ignition module. I had this, only the temperature rose to 85 and stalled.

Error 45. 16kl.24 engine

Gives error 10 on the instrument cluster 2110 check is on

And the skill does not work the button itself to reset the daily mileage, etc.

The dzhekichan is on fire at the top ten of 2001. 1.5 8cl. It does self-diagnosis, but does not show an error, it immediately switches to mileage.

Error 2 is on. It is not reset. Tell me what the error is and how to deal with it. VAZ 2110 injector 16 valves. Thank you in advance.

This is a FLS campaign (fuel level sensor), if I changed it, it shows, it also doesn’t reset for me at 15x !?

Tell me, please, on the instrument panel, error 14 after diagnosis, what does it mean ??

Please tell me, I’m starting to move at night, the car stalls, I turn on the stove, the temperature climbs up and at the same time the thermostat does not open the lower branch pipe cold VAZ 2110, 8 cells.

Help. Put the car in the parking lot. Came in the morning, curled up. It worked for two or three minutes and died out and everything would not start. There is a spark, the ignition has not gone astray. the fuel pump is noisy, there is gasoline in the frame. The starter wound well for the first day until it planted the battery, on the second day the starter starts to wind then the wedge, winds the wedge Until the battery again sat down. We put the note battery the same, until it sat down. We put the next starter began to wind the demon of the wedge. But it didn't curl. Help.

Please tell me. There was an error 14. What does this mean?

Who can tell me what the hell is going on with the car?, 1.6 8 valve engine. it whispers to start up on a cold one, but when I drive off the beaten path and start the engine, I can’t for two or three minutes while the engine is hot!

Try to start the engine with a screwdriver, if it works, then change the retractor; if not, then change the fuel filter near the tank

Get out of the car, open and close the gas tank filler. It helps, and then you will see the result yourself.

install an additional relay on the starter and forget about it. I had this on the VAZ2114 after installing the additional relay, I forgot about the problem

Good afternoon, can you help me with advice)

After starting a cold engine, the car stalls after 3-4 seconds of operation. if you do not let it stall and put a little pressure on the gas, it continues to work, if you do not use gas, then it will only work from the third or fourth start. idling is unstable, fluctuating from 700 to 900 rpm. Starts up hot with no problems, but idle is just as unstable. Replaced sensors: TPS, DMRV, IAC.

Auto Vaz2110 1.5 16cl.

Hi Andrey, I think it breaks high voltage wires, check them in the dark

There are modules for each cylinder

Hello, check the camshaft sensor, there was such crap, the cam on the camshaft broke off, which indicates the moment to the sensor.

The same crap. That winter, it started up without any problems. Right there: I changed everything, it starts all the way to the cold one from 3-4 times and it costs troit until the lawn. Warm up normally. And in the summer it was several times that: It started and after a couple of seconds it stalls. WTF? Please tell me.

Look for an air leak! Even under the receiver, the sealing rings are hardened! He himself suffered until a good master accidentally discovered

Try to replace the RTD sensor, I had a similar situation

Remove the glow plugs and see if there is oil at the bottom; if there is, you need to remove the valve cover, the plate, peel off the old sealant and apply a new one, and also go to the diagnostics (lamda probe), the computer will show everything.

VAZ21124 car. 2007 release

What does this mean I can't find it anywhere.

Guys help, shows error code 4 and 6

what does error 2 mean

1. Turn signal relay clicks while driving. what could be?

2. Is it possible to disconnect the battery on the VAZ 21124 1.6 i (injector) 16 valves?

guys an error like in video 14 dropped and what is the reason that you need to replace which sensor in the unit or which in the thermostat

I HAVE THIS BATTERY IS NOT CHARGED, I TIGHTENED THE GENERATOR BELT AND STARTED STARTING AFTER STOPPING OR PARKING FROM THE FLOOR TURN

the check is on, somewhere after 90 degrees it goes out, stands and lights up again, what's the problem?

Sasha - if the car is malfunctioning at the same time - for diagnostics ... If the car works smoothly when JackieChan appears - forget it. If you can’t score, buy yourself some kind of cheap computer - it will allow you to identify errors yourself and remove them.

help… vaz 2112 won’t start… put the car in the parking lot, turned it off, went to the store, came back, tried to start the car, but it didn’t start. turning the ignition on again and turning the key to start as usual, it started up as usual without problems ... arrived home .. and in the morning the same problem ... checked for errors, there is error 8 ... low voltage, as I understand it ... but the battery was only removed from charging ... and the battery icon on the panel does not light up when ignited ... it’s still barely visible, it’s very dim .. and when you turn the key to start, it goes out completely ...

Poor contact of the terminals on the battery, check the “ground” everywhere, lubricate the terminals and tighten them better.

Today I lubricated the terminals and tightened them tighter on the battery, but I didn’t look at all the other masses, tomorrow I’ll clean everything and see … if it doesn’t help .. I’ll write it off, thanks!

Change the retractor on the starter

Did you put a relay on the starter? They have a disease.

Posted on 29 August 2016

Starting the diagnostic mode and error codes for the instrument panel VAZ 2110, 2111 and 2112.

Read the article on the website for details:

vaz2112 speedometer lies at 10 20 km

How do you release the reset button? Sazur eights disappear, what does it mean?

Okay, I have a question for you. VAZ 2111 when I turn on the dimensions, they burn, i.e. everything is fine, I switch to low beam, the dimensions go out, the panel goes out, what's the problem?

Hello, I have a 2110 2000, the tachometer constantly keeps 2000 rpm, I changed the idle speed sensor - it's useless. I think the computer, how to reset the settings on the machines of 2000? - thank you

I don’t press it like that and there is no reset, do not tell me what is the problem? 

hello, I tried to do it as in the video for the VAZ 2112 2002, what do you think is the reason?

Greetings. I did diagnostics on the instrument panel and showed firmware 1.1 and error number 8 popped up. And even before that, error 14 popped up. What are these errors and how to fix them so that I don’t have them

Hello, I also have a VAZ 2110 error 14 as in your video (High signal level of the coolant temperature sensor) what does it mean and what needs to be changed

Thanks for the informative and necessary video .. For those who are interested, see ERROR CODES http://www.drive2.ru/c/1046771/

It also works on four (16V)

Question! if you can help. VAZ 2112. My camshaft sensor is not connected to the brains of the car. So, the sensor itself is connected and the car drives and works fine (as for me), but the check engine lights up constantly. I bought the connection plug myself. But here's the problem, there is a current one wire for connection - brown, two more wires to which it is not clear what to connect to, since I don’t see more torn wires, and two more wires come out of the connection socket. It is impossible to find a normal auto electrician in my city. How to connect the sensor correctly, how to determine what to connect to what, and where to look for torn wires?

I showed 1.8 firmware version. What is this firmware?

hello, will it work for 2114?

Hello. I recently bought a VAZ 21102 and there is a problem with the speedometer. It does not show the speed, and sometimes it starts to show, but only up to 40 km. Can't tell what could be the problem. 

Today I checked the instrument panel, it works. The only thing left is the speed sensor. Thanks for the video and advice.

and if I do not have a digital display, how can I find out about errors?

I have a euro panel, like in Kalina. The first press - all the sensors, the arrows are spinning, the second press - firmware version 3.0 (I was reflashed 2 times, because of the oxygen sensor), and now, with the third press, the number 89 appears at the bottom, and above it, a little smaller, the numbers - 2-4-6. And what would that mean, I wonder?

dude you are handsome, we are waiting for new secrets

why is the engine check still on after resetting the errors?

There is one thing, but, I have a panel from the old 10k, there is a tabular counter instead of electric numbers.

my vaz 2112 does not show the firmware version, what does this mean?

thank you, I didn't know this trick

I did this and the generator started working for me, I thought about changing it)))

At the end of the video, some error codes are shown on a black screen. But it is clear how it can be code 12 (4 + 8). 4 - increased supply voltage; 8 - low supply voltage. How can there be undervoltage and overvoltage at the same time?

Hello. tell me why my daily mileage is constantly reset after I turn off the car?

It's strange, I reset error 14, as in the video, but there are still 2 errors on the Multitronics VG1031. Either not all errors were reset by this method, or is Multitroniks buggy?

thanks for the useful advice.))) on the VAZ 2131, the self-diagnosis showed 8 error, erased, restarted errors 0, but the check is still on, apparently, the diagnostic itself does not all show problems (errors)?

I did everything the same, but it does not show the firmware, nothing throws off the normal operating mode

healthy. there is another question, I started the car, but it does not work smoothly, as if on two pistons and stalls, I don’t understand what is the reason, tell me what the reason is and how you can check it yourself

How do you release the reset button, the eights disappear, which means

people tell me who knows how to fix it (in short, I had a luxury VAZ 2110 6 model year before everything was fine, but recently it began to torment my head one problem, the chip of the problem, I turn on the ignition, everything is on, everything works fine as it should, the pump pumps, I turn the key further to start the engine and nothing happens quite a bit, the lights on the dashboard fade out and the starter itself does not start the car, it just deadly ignores me, I take a screwdriver and go to close the contacts on the starter itself with the ignition on, everything works and the car starts up well and most importantly, it may not always be possible at once to drive without any problems, everything starts up normally with the key, and at once it can fuck your head like this every time you start the engine, at first I thought the signal from the oak had collapsed, turned it off completely and everything seemed to work out, but after a while and everything came back again, but less often than before, but one hell the problem remained unresolved the diagnostics did everything that is possible everything is fine all the sensors work the brain of the car the live wiring on the ignition itself checked everything seems to be fine the fuses are also normal so I don’t understand what the problem is and how to fix it and by the way when starting the engine what from the key what from a screwdriver to the operation of the machine itself, nothing at all, but this problem is reflected, everything works fine. who knows tell me how to fix this problem and if possible make a vidos thanks in advance. 

how to reset error number 8 or fix it, it is not reset and the interior light has stopped burning Niva Chevrolet

Thank you for the video! Tomorrow I will test it on a couple of cars in my service.

Thank you for the video! I have error number 14 what does it mean? Please tell me!

Hello, could you please tell me that this diagnostic only works on VAZ cars? I have a hyundai tiburon 1996. not start after changing the battery, it was normal for a week and now it has not started for 2 days. tell me what could be wrong?

glitched mileage counter how to fix it no one will tell you shows only 999999

Sandro that maybe the speedometer is buggy how to fix the error?

Thank you bro, I'll diagnose

I turn the ignition key and the injector indicator does not light up

Sandro did diagnostics, it showed 1.6, what does it mean?

cool video. didn't know

where can i find the codes? thx for the video

Help, please advice. The fact is that once I dismantled the instrument panel and got distracted by mounting it back. Thus, I put 1 terminal on the back of the shield, and not 2. I turned on the ignition. Self-diagnosis started and the tachometer and speedometer needles fell below zero. They work as usual. But now the arrows are lying because they are below. Will you have to change the shield (with a budget of 1500 for auto-parsing)? Or would it be better to fix it?

And what if on the 12th europanel?

With your left hand, you remove it with your right hand, you press the button THAN YOU turn on the ignition. like and subscribed

Greetings. Please tell me I made a diagnosis, how error 10 appeared on the video, I reset it, and then it all appears exactly? tell me what to do. 

hey guys plz help

Hi all! vaz 21099 injector question. engine cold. starts up normally. I arrive at the object "off the beaten track. In a couple of minutes I need to leave, the engine does not start. Now the most interesting thing is __________________ until the engine cools down to 80 g ----------- it does not start. I changed everything that is possible, of course, except for "" ""gaskets""""", help me figure it out!

wow wow. .. I didn’t know, I’ll go check!))

I know errors 8, 4, what they mean and where you can get the decoding of errors

and in my diagnostic mode 1 and 3 times all the arrows reach only the middle of the scale, the 2nd completely to the end of the scale. It does not show error codes. The fuel level arrow does not drop below 10-15 liters when the ignition is on.

hello, I have a vaz 21099 injector, it shows the number 10 for me, then from the left one is added 3.10 then 4.3.10 then 4.3.2.10 who knows help. thanks in advance

Good hour, vaz 21099 code 14 what is it?

I have a VAZ 2115, when you turn the key to the ignition position, it buzzes under the steering wheel. What is this? sometimes the neighbor remains on, or the size in the headlights. It seems that I have a current leak, but I do not know. brought today akb "Tab", in banks pieces of ice. Acb bought recently new. where the size on the right headlight where the lamp is inserted, the plastic burned out in places partially. I have a 3 year ignition switch that is broken and stuck. maybe because of him? but I haven't changed it yet, laziness! even when the voltage on the battery is 10.6-11.0 volts, the numbers 888888 appear everywhere on my instrument panel.

Sandro tell me what could be wrong with the speedometer. the thing is, the arrow stands still sometimes jumps and freezes, but the mileage works exactly. that's just the arrow drives.

what is 1.8 version

Please tell me. I have a VAZ 2114 on a cold car, it starts up perfectly for a few minutes 2.3, it works, it starts troit, I restart it, then it works well, what is the reason?

since 2001 a dozen but just found out right now

hehe i'll try it tomorrow

for 2114 this works. 

works for 2114 too. verified.

If there is no daily mileage, digital, there is no way to check? :)

doesn't work for me(((why??

please tell me how to decipher the error, it shows error 14 on 2114,

I changed the DMRV sensor, nothing has changed, the speed is jumping, it is choking with a couple! what's the matter, tell me

My VAZ2110 does not start well when cold. And the expense has become more.

my self-diagnosis starts immediately when the key is turned. how can I see errors here, if any?

What does error code 8 mean on a vaz 2110

Hello, please tell me if I change the instrument panel, will the mileage change or stop as it was?

after self-diagnosis, error code 78 is displayed, I can’t find information on these errors anywhere, who will tell me. I will be grateful.

please tell me what error code 10 means on a vaz 2110

In the self-diagnosis mode, the VAZ 2110 dashboard displays the following error codes: 2 - Overvoltage 3 - Fuel level sensor error * 4 - Coolant temperature sensor error * 5 - Outside temperature sensor error ** 6 - Engine overheating *** 7 - Emergency pressure oil*** 8 – Brake defect *** 9 – Low batteries*** E – Error recognition in the data packet embedded in the EEPROM

I have Error 8 - low voltage, less than 8 volts. do not tell me where to look for the jamb? thanks.

Hello! Please tell me if anyone knows, in the top ten of 2001 on the instrument panel everything is 999990 and that's it! Glucon or what?

them. need to check)))

Thank you! I have been working with cars for 15 years, but I didn’t know such nonsense.

Is there any way to check whether the odometer is wound up or not. 

Useful video, explain so you can reset the ECU errors correctly understood. 

But the burning check does not go away (((

Good afternoon, tell me why I don’t read errors, although the check is on, it means there is some kind of failure

I fill the tank to the eyeballs and the check engine malfunction lights up I turn off the minus I wait for a while I put on the terminal and everything is fine, why?

Tell me please, I understood correctly - is this display of the ECU firmware version? :)

I don't understand, what does deleting error codes do?

Hello! They bought such a problem in 2111 - everything works on the tidy - the only problem is with the mileage counter - the total mileage does not show anything at all, the daily mileage shows, is reset, but does not count.

why can't I connect to the brain through diagnostics

What does error 14 mean?

Hello Sandro, the speedometer is buggy, for 2110, 2000, the speedometer is older than this, mechanical or something))) When I start driving, the arrow is at zero. I knock on the top of the panel went. or the bump will shake it. Can you suggest a problem? and it is also possible to diagnose the old instrument panel?

detailed codes here https://www.drive2.ru/c/1046771/

hammer. I did not know this. thank you!

Hello Sandro. I have a VAZ 2114, I do everything as in the video, but for some reason, after the test, I press the button a second time, it doesn’t show an error, that is, the test started, the arrows to the right to the end fell back and everything turns out just the ignition is on, I press the second time and nothing please tell me why not does it show any errors or error code? Thank you in advance. 

in general looking for a problem. speedometer is not working. what is this video for? can someone tell me about the problem of the speedometer not working?

how to fix error 8. what needs to be changed? thank you.

and if you reset the errors, then there will be no malfunction or only on the panel there will be no

I have such a problem on a VAZ 14, I installed a generator from a VAZ 9 ki carburet. A year ago everything was fine and an hour with a small abortion of a tan, the gas bulb goes out, can the diode?

error number 14 what is this error?

for VAZ 2107 2005 injector. Perform instrument panel self-diagnosis. 

2. While holding down the daily mileage reset button, turn on the ignition. All positions of familiarity (segments) should light up on the LCD, which indicates the beginning of self-testing.

3. Press any of the on-board computer control buttons. The LCD should display the program version (Ver 1.0 and higher).

4. Press any of the control buttons again. The following error codes (if any) should be displayed on the positions of the first and second lines of the LCD:

3 Fuel level sensor error*

4 Coolant Temperature Sensor Error*

5 Outside temperature sensor error**

6 Motor overheat***

7 Emergency oil pressure***

8 Brake defect***

9 Battery low***

E Error detection in the data packet embedded in the EEPROM

* – an error is registered if within 20 sec. a break in the sensor is detected;

** – an error is registered if within 20 sec. valid sensor data are not recognized (indication on the LCD "- °С");

*** – accompanied by an acoustic signaling device.

All acoustic signaling devices are output only when the ignition is on and if certain criteria are met. If several criteria are active in parallel, the annunciators should be displayed in the sequence of their arrival one after another with a pause of 1.5 to 2.5 seconds.

2. Engine overheating.

Criteria: indication of coolant temperature ≥ 115°C.

Termination: The needle of the coolant temperature gauge drops to ≤ 110°C.

Repetition: The needle of the coolant temperature gauge drops to ≤ 110°C, then rises again to ≥ 115°C.

3. Emergency oil pressure.

Criteria: engine speed ≥1000 rpm; oil pressure input active for 10 sec.

Signal: constant sound for 5 sec.

Termination: "oil pressure" input not active or speed ≤ 900 rpm.

Repetition: Oil pressure input active, RPM decreased to ≤ 900 rpm and then increased again within 10 sec. ≥ 1000 rpm

4. Brake defect (front brake pad wear indicator). Criteria: Brake fault input active for 10 sec.

Signal: 0.5 sec on / 0.5 sec off 5 repetitions. Termination: input "brake defect" is not active. Repeat: Brake fault input active for 10 sec.

5. Discharge of batteries.

Criteria: speed ≥ 1000 rpm, battery input active for 60 seconds.

Signal: 0.5 sec on / 0.5 sec off 5 repetitions.

Termination: battery input not active or RPM ≤ 900 rpm.

Repetition: Battery input is active and RPM has decreased to ≤ 900 rpm and then increased again within ≥ 60 sec to ≥ 1000 rpm.

6. Seat belts are not fastened when the ignition is turned on. Criteria: ignition on, seat belts not (yet) fastened.

Signal: 0.5 sec on/0.25 sec off/0.25 sec on/0.25 sec off, 5 repeats.

7. Fuel reserve.

Criteria: activation of the fuel reserve indicator.

Signal: 0.25 sec on / 0.25 sec off, 2 repetitions.

Checking Instrument Panel Error Codes

2 - increased voltage of the on-board network;

3 - error of the fuel level sensor (if an open circuit of the sensor is detected within 20 s);

4 - error of the coolant temperature sensor (if an open circuit of the sensor is detected within 20 s);

5 - error of the outdoor temperature sensor (if there is no sensor reading within 20s, indication on the LCD "-C");

6 - engine overheating (the criterion for triggering an acoustic signaling device is fulfilled);

7 - emergency oil pressure (the criterion for triggering an acoustic signaling device is fulfilled);

8 - defect of the brake system (the criterion for triggering an acoustic signaling device is fulfilled);

9 - the battery is discharged (the criterion for triggering an acoustic signaling device is fulfilled);

E - definition of an error in the data packet embedded in the EEPROM.

6. Press any of the control buttons again. All positions of familiarity (segments) should light up on the LCD - the system has returned to the state of point 2.

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