Niva with ECM
As you know, the first Russian SUV Niva was born back in the days of the Soviet Union. At that time, in the USSR they did not even think about an electronic engine control system; the entire process of operation of the internal combustion engine was mechanical. The engine was supplied with fuel through a carburetor. At present, the Niva still continues to be produced, but with its ancestors, the modern Niva has only the body left and it has undergone minor modifications.
The carburetor was replaced with an injector, the interior was changed and the appearance of the car was transformed, but still the Niva remained Niva. The legendary Niva cross-country ability did not deteriorate after these modifications, but became much more comfortable.
In this article we will talk about the sensors of the engine control system in the injection Niva, namely, it describes in detail each of the sensors, where it is located and what function it is responsible for, as well as the signs of sensor malfunction are described in detail.
ECU - selection, faults, installation, firmware.
ECU - selection, faults, installation, firmware.
Post by Chevivagen » March 10, 2010, 8:03 pm
Re: Flashing the motor
Post by ALK » Mar 10, 2010, 8:15 pm
Who understands what is happening behind the fence of the zoo? ©
Re: Flashing the motor
Post by Chevyvagen » March 10, 2010, 21:28
Re: Flashing the motor
Post by zloybober » 03 May 2010, 17:11
Re: Flashing the motor
Post by Dron » 05 May 2010, 10:21
Re: Flashing the motor
Post by Anton » 05 May 2010, 11:39
Self-diagnosis (the process of establishing a diagnosis, that is, a conclusion about the nature of the disease and the patient’s condition) ECU
Posted by spazma » April 17, 2011, 12:50 pm
Re: Self-diagnosis (the process of establishing a diagnosis, that is, a conclusion about the nature of the disease and the patient’s condition) ECU
Post by Axen » April 17, 2011, 2:08 pm
Re: Self-diagnosis (the process of establishing a diagnosis, that is, a conclusion about the nature of the disease and the patient’s condition) ECU
Posted by spazma » April 17, 2011, 5:28 pm
Re: Self-diagnosis (the process of establishing a diagnosis, that is, a conclusion about the nature of the disease and the patient’s condition) ECU
Post by Axen » April 17, 2011, 5:36 pm
Re: Self-diagnosis (the process of establishing a diagnosis, that is, a conclusion about the nature of the disease and the patient’s condition) ECU
Posted by spazma » April 17, 2011, 05:48 pm
Power supply to engine ECU 21214.
Post by Al Giardino » 06 May 2011, 18:53
So: When the engine is running, the relay periodically clicks (on bumps in particular), when the clicks occur, the engine turns off (stalls) and immediately turns on.
My guess: The power supply to the ECU is lost, there is a bad contact somewhere, possibly a control one (so if the power supply were lost, the relay would not open)..
Question(s): Where can I find the relay, and where and from where do the contacts go!? What else could be the reason, other than disgusting contact!?
Z.Y. Please don't throw too many tomatoes!
Re: Power supply to engine ECU 21214. Help needed!!
Post by Ghost_killer » 06 May 2011, 22:34
Re: Power supply to engine ECU 21214. Help needed!!
Post by Al Giardino » 08 May 2011, 22:22
Not a relay, I cleaned everything, bent the contacts, it still “hiccups”
Re: Power supply to engine ECU 21214. Help needed!!
Post by Ghost_killer » 08 May 2011, 22:56
Re: Power supply to engine ECU 21214. Help needed!!
Post by Al Giardino » 08 May 2011, 23:57
Re: Power supply to engine ECU 21214. Help needed!!
Post by Axen » 09 May 2011, 07:16
Re: Power supply to engine ECU 21214. Help needed!!
Post by medvedka » 09 May 2011, 23:25
Re: Power supply to engine ECU 21214. Help needed!!
Post by Al Giardino » May 10, 2011, 03:27 pm
I checked all fuses, contact is good.
Moreover, all this happens at low speeds. Or after letting off the gas and coasting, it may turn off a couple of times, much more often on bumps!! Or when you start moving!! Another highlight: If the car was cool, started it, warmed up and drove off, then in the next 20 minutes it does not “hiccup” (most often). But after a couple of hours of driving, it starts, and at the same time it starts at the bottom (up to 2000-3000 rpm. )!
Maybe some sensor is acting up!? I'm thinking about a crankshaft position sensor...
Source: www.niva-club.net
Electronic engine control unit (ECU)
An ECU is a kind of computer in a car; it is in this device that the entire operation of the internal combustion engine is corrected. All sensors that are installed in the car transmit readings specifically to this unit, and based on the readings, it makes changes to the operation of the engine, which affects both the engine speed and its consumption.
Symptoms of ECU malfunction:
There can be a huge number of signs of malfunction of this unit, because signs of failure of one sensor may even indicate failure of the unit.
Mass air flow sensor (MAF)
This sensor is located near the Niva air filter box. Air flows through this sensor, which is necessary to form the air-fuel mixture. The sensor records the amount of air passing through it and sends signals to the electronic engine control unit (ECU).
Signs of a DMRV malfunction:
- Loss of vehicle dynamics;
- Increased fuel consumption;
- Unstable idling (speeds fluctuate);
- Difficulty starting the engine when the engine is warm;
Crankshaft position sensor (CPS)
The Niva DPKV is installed in a special hole in the oil pump drive cover. This sensor is responsible for setting the ignition timing. The sensor takes readings from the crankshaft pulley, which has teeth and in one of the places there is “caries”, that is, several pulley teeth are missing. It is “caries” that the DPKV understands in what position the crankshaft is. The sensor itself resembles an inductive coil, which generates impulses when the crankshaft rotates and transmits them to the computer.
If the sensors fail, the car will not start.
Signs of DPKV malfunction:
- The car does not start;
- The car stalls spontaneously;
- Uneven operation of the internal combustion engine;
Controller – version, replacement? Which controller should I carry in a ZiP?
Reg.: 12/06/2004 Threads / Messages: 4029 / 23189 From: Moscow Age: 66 Car: 21214M, 2013
Table on types of Niva engines and controllers (ECUs)
Alexey aka ALER.
135 messages on previous pages Reg.: 03/31/2011 Messages: 2 From: RUSSIA SARATOV Age: 38 Car: VAZ-21214M 2011Reg.: 12/06/2004 Threads / Messages: 4029 / 23189 From: Moscow Age: 66 Car: 21214M, 2013
Alexey aka ALER.
Reg.: 03/31/2011 Messages: 2 From: RUSSIA SARATOV Age: 38 Car: VAZ-21214M 2011
Reg.: 05/21/2011 Messages: 474 From: Glazov Age: 42 Car: Lada4x41 May 2011
Name: Evgeny Reg.: 03.26.2008 Threads / Messages: 126 / 4822 From: Irkutsk Age: 35 Car: Jimny 2013
Reg.: 01/04/2011 Threads / Messages: 1 / 101 From: Orel Age: 42 Car: SY Actyon New 2.0 MT 4x4 Comfort
Reg.: 05/03/2011 Messages: 15 From: Our homeland, Yaroslavl Age: 48 Car: LADA 21214 M, April 2011 E-gas
Reg.: 01/04/2011 Threads / Messages: 1 / 101 From: Orel Age: 42 Car: SY Actyon New 2.0 MT 4x4 Comfort
Reg.: 08/19/2008 Messages: 319 From: Our homeland, Volzhsky Age: 50 Car: 21214, 2005 7.9.7+
similarly. also 2005 official ones for him
I'm thinking about newer firmware, but is it worth changing to B120ER19? In principle, the ancient one suits me. What if it “flies”
Coolant temperature sensor (DTOZH)
DTOZH on Niva is installed in the cylinder head outlet pipe. The coolant temperature sensor is a fairly simple element in its design. The sensor is based on a thermistor, which changes its resistance as the temperature changes.
One of the functions of the sensor is to start the electric engine cooling fans when the coolant temperature threshold is reached. The sensor is also responsible for starting the engine in cold weather; according to the coolant temperature readings, the electronic control unit forms the fuel mixture necessary for more proper warming up of the car engine. This can be replaced by the presence of high warm-up speeds at the moment of starting the internal combustion engine.
Signs of DTOZh malfunction:
- Cooling fans do not work;
- No warm-up speeds;
- Difficulty starting the internal combustion engine;
- Increased fuel consumption;
Technologies of progress
One of the most important technical problems in the early days of the development of automobile technology was ignition. A solution to the problem was found in 1897 by a car enthusiast named Robert Bosch. Since that time, the name BOSCH has been associated with progressive ideas and innovations in the development of technology, especially in the field of fuel systems.
Today, modern vehicles must meet increasingly high demands, including fuel economy, low emissions and the highest degree of driving pleasure. To meet all requirements simultaneously, it is not enough to develop individual components. Progress can only be achieved with a holistic approach - BOSCH uses know-how and complex relationships between subsystems throughout the system to achieve new, innovative solutions. The company, jointly interacting with global auto manufacturers, develops and produces BOSCH system components, using many years of experience and controlled quality standards. Thus, BOSCH presents an extensive product range characterized by high quality and reliability, as well as a large market coverage.
Throttle Position Sensor (TPS)
The TPS is installed on the throttle itself and is a potentiometer. This sensor reads readings from the throttle position and transmits them to the ECU. The damper opens access to air, thereby increasing engine speed. When the damper opens, the sensor sends a signal to the control unit to increase the fuel supply, which is necessary to form a working air-fuel mixture.
The sensor that most often fails is an unreliable element of the system. Subsequently, they abandoned it and switched to an electronic throttle.
Signs of a malfunction of the TPS:
- High speed at start-up;
- Jumps in engine speed;
- Increased fuel consumption;
- Not smooth idle;
Niva sensors
As you know, the first Russian SUV Niva was born back in the days of the Soviet Union. At that time, in the USSR they did not even think about an electronic engine control system; the entire process of operation of the internal combustion engine was mechanical. The engine was supplied with fuel through a carburetor. At present, the Niva still continues to be produced, but with its ancestors, the modern Niva has only the body left and it has undergone minor modifications.
The carburetor was replaced with an injector, the interior was changed and the appearance of the car was transformed, but still the Niva remained Niva. The legendary Niva cross-country ability did not deteriorate after these modifications, but became much more comfortable.
In this article we will talk about the sensors of the engine control system in the injection Niva, namely, it describes in detail each of the sensors, where it is located and what function it is responsible for, as well as the signs of sensor malfunction are described in detail.
Electronic engine control unit (ECU)
An ECU is a kind of computer in a car; it is in this device that the entire operation of the internal combustion engine is corrected. All sensors that are installed in the car transmit readings specifically to this unit, and based on the readings, it makes changes to the operation of the engine, which affects both the engine speed and its consumption.
Symptoms of ECU malfunction:
There can be a huge number of signs of malfunction of this unit, because signs of failure of one sensor may even indicate failure of the unit.
Mass air flow sensor (MAF)
This sensor is located near the Niva air filter box. Air flows through this sensor, which is necessary to form the air-fuel mixture. The sensor records the amount of air passing through it and sends signals to the electronic engine control unit (ECU).
Signs of a DMRV malfunction:
- Loss of vehicle dynamics;
- Increased fuel consumption;
- Unstable idling (speeds fluctuate);
- Difficulty starting the engine when the engine is warm;
The Niva DPKV is installed in a special hole in the oil pump drive cover. This sensor is responsible for setting the ignition timing.
The sensor takes readings from the crankshaft pulley, which has teeth and in one of the places there is “caries”, that is, several pulley teeth are missing. It is “caries” that the DPKV understands in what position the crankshaft is.
The sensor itself resembles an inductive coil, which generates impulses when the crankshaft rotates and transmits them to the computer.
If the sensors fail, the car will not start.
Signs of DPKV malfunction:
- The car does not start;
- The car stalls spontaneously;
- Uneven operation of the internal combustion engine;
DTOZH on Niva is installed in the cylinder head outlet pipe. The coolant temperature sensor is a fairly simple element in its design. The sensor is based on a thermistor, which changes its resistance as the temperature changes.
One of the functions of the sensor is to start the electric engine cooling fans when the coolant temperature threshold is reached. The sensor is also responsible for starting the engine in cold weather; according to the coolant temperature readings, the electronic control unit forms the fuel mixture necessary for more proper warming up of the car engine. This can be replaced by the presence of high warm-up speeds at the moment of starting the internal combustion engine.
Signs of DTOZh malfunction:
- Cooling fans do not work;
- No warm-up speeds;
- Difficulty starting the internal combustion engine;
- Increased fuel consumption;
The TPS is installed on the throttle itself and is a potentiometer. This sensor reads readings from the throttle position and transmits them to the ECU. The damper opens access to air, thereby increasing engine speed. When the damper opens, the sensor sends a signal to the control unit to increase the fuel supply, which is necessary to form a working air-fuel mixture.
The sensor that most often fails is an unreliable element of the system. Subsequently, they abandoned it and switched to an electronic throttle.
Signs of a malfunction of the TPS:
- High speed at start-up;
- Jumps in engine speed;
- Increased fuel consumption;
- Not smooth idle;
The knock sensor is installed on the right side of the vehicle's cylinder block. A DD is needed to catch detonations in the engine and adjust the fuel mixture. The sensor itself is made on the principle of a piezoelectric element and, in the presence of vibrations in the engine, transmits impulses to the ECU, which in turn adjusts the fuel mixture.
Signs of DD malfunction:
- Increased fuel consumption;
- Uneven operation at idle (increased vibrations);
- Jerks when the car moves;
The oil pressure sensor is located on the right side of the cylinder block and is screwed into the oil line fitting. This sensor is necessary to monitor the oil pressure in the engine. As you know, operating a car with low oil pressure in the internal combustion engine can damage it. When the oil pressure in the internal combustion engine decreases, the sensor closes the contact and sends a signal to the Niva instrument panel, lighting up the oil pressure indicator in the form of a red oil can.
Signs of DDM malfunction:
- Constant lighting of the oil pressure lamp;
- Oil leak from the sensor junction;
This sensor is located, just like the TPS, on the Niva’s throttle valve. The essence of the sensor's operation is to open and close the channels through which air flows to operate at idle speed. The IAC is involved in the operation of the internal combustion engine only at idle; when the speed increases, the regulator is switched off. IAC is a kind of DC motor with worm gear. Quite often the sensor fails. Subsequently, this sensor was abandoned in favor of an electronic throttle.
Signs of IAC malfunction:
- Lack of XX speed (engine stalls);
- Increased speed at idle;
- Increased fuel consumption;
The phase sensor, also known as the camshaft position sensor, is installed in the cylinder head plug. Designed for phased fuel injection. Reads readings from the camshaft and transmits them to the computer; these readings are necessary for accurate distribution of the fuel mixture between the cylinders.
Signs of DF malfunction:
- Increased fuel consumption;
- Increased engine vibrations;
The brake pedal sensor is installed on the pedal assembly under the Niva's steering column. In cars without the E-GAZ system, it is only responsible for turning the brake lights on and off. In cars that have an electronic throttle and therefore an electronic gas pedal, this sensor affects the operation of the pedal. If the brake sensor breaks down, the gas pedal stops working.
Signs of malfunction:
- The gas pedal does not work;
- Jerking when moving at a constant speed;
- Loss of power and vehicle dynamics;
The speed sensor of the Niva car is installed in the transfer case. The function of the sensor is to transmit vehicle speed readings. The sensor also forms the fuel mixture; when the car is moving at neutral speed, you can notice that the speed is slightly higher than when the car is running at XX while standing still. Increased speed when driving is necessary to avoid dips when turning on the speed and sharp acceleration.
Knock sensor(DD)
The knock sensor is installed on the right side of the vehicle's cylinder block. A DD is needed to catch detonations in the engine and adjust the fuel mixture. The sensor itself is made on the principle of a piezoelectric element and, in the presence of vibrations in the engine, transmits impulses to the ECU, which in turn adjusts the fuel mixture.
Signs of DD malfunction:
- Increased fuel consumption;
- Uneven operation at idle (increased vibrations);
- Jerks when the car moves;
Oil pressure sensor (OPS)
The oil pressure sensor is located on the right side of the cylinder block and is screwed into the oil line fitting. This sensor is necessary to monitor the oil pressure in the engine. As you know, operating a car with low oil pressure in the internal combustion engine can damage it. When the oil pressure in the internal combustion engine decreases, the sensor closes the contact and sends a signal to the Niva instrument panel, lighting up the oil pressure indicator in the form of a red oil can.
Signs of DDM malfunction:
- Constant lighting of the oil pressure lamp;
- Oil leak from the sensor junction;
VAZ-2112 harness diagrams
Instrument panel harness diagram
1, 2, 3, 4 – instrument panel harness pads to the front harness; 5 — block of the instrument panel harness to the side door harness; 6, 7, 8 — instrument panel harness pads to the rear harness; 9 – rear window heating switch; 10 – light signaling switch; 11 – windshield wiper switch; 12 – block of the instrument panel harness to the radio; 13 – mounting block; 14 — instrument cluster; 15 – heater control controller; 16 – heater motor switch; 17 — block of the instrument panel harness to the ignition system harness; 18, 19 — blocks of the instrument panel harness to the air supply box harness; 20 — ignition switch; 21 – fog lamp relay; 22 – sound signal relay; 23 — power window relay; 24 — starter relay; 25 – seat heating relay; 26 – external lighting switch; 27 – fog lamp switch; 28 – cigarette lighter; 29 – lampshade lighting of the glove box; 30 – glove box lighting switch; 31 – switch for rear fog lights; 32 – right steering column switch; 33 – socket for connecting a portable lamp; 34 — instrument lighting switch; 35 – brake signal switch; 36 – sound signal switch; 37 – alarm switch; 38 – air distribution drive gearmotor; 39 – VAZ-2112 illuminator; 40 — instrument panel harness block to the front harness; 41 – trunk lock drive switch; 42 – rear fog light relay.
Idle air control (IAC)
This sensor is located, just like the TPS, on the Niva’s throttle valve. The essence of the sensor's operation is to open and close the channels through which air flows to operate at idle speed. The IAC is involved in the operation of the internal combustion engine only at idle; when the speed increases, the regulator is switched off. IAC is a kind of DC motor with worm gear. Quite often the sensor fails. Subsequently, this sensor was abandoned in favor of an electronic throttle.
Signs of IAC malfunction:
- Lack of XX speed (engine stalls);
- Increased speed at idle;
- Increased fuel consumption;
Phase sensor (PF)
The phase sensor, also known as the camshaft position sensor, is installed in the cylinder head plug. Designed for phased fuel injection. Reads readings from the camshaft and transmits them to the computer; these readings are necessary for accurate distribution of the fuel mixture between the cylinders.
Signs of DF malfunction:
- Increased fuel consumption;
- Increased engine vibrations;
Technical characteristics of the VAZ 21124 engine
This is a four-stroke gasoline engine with distributed fuel injection with a volume of 1599 cm 3 (1.6 liters). Number of cylinders – 4, arrangement – in-line. The camshaft is located in the upper part of the engine - the cylinder head (cylinder head) and is driven by a belt drive from the crankshaft. The engine is cooled by forced circulation of coolant using a water pump. Lubrication of moving parts occurs by splashing engine oil and forced circulation of the latter through special channels.
The characteristics of the 21124 engine, given in the operating instructions, are as follows:
- Maximum power (achieved at 5000 rpm) – 65 kW or 89 hp. With.
- Torque (achieved at 3500-3900 rpm) – 132 N/m.
- Weight: 120 kg.
- Fuel used: gasoline AI 92, 95, compressed natural gas.
- Total number of valves/cylinder: 16/4.
- Number of cylinders: 4.
- Piston stroke: 72.6 mm.
- Cylinder width; 82 mm.
- Compression ratio: 10.3.
Brake pedal sensor
The brake pedal sensor is installed on the pedal assembly under the Niva's steering column. In cars without the E-GAZ system, it is only responsible for turning the brake lights on and off. In cars that have an electronic throttle and therefore an electronic gas pedal, this sensor affects the operation of the pedal. If the brake sensor breaks down, the gas pedal stops working.
Signs of malfunction:
- The gas pedal does not work;
- Jerking when moving at a constant speed;
- Loss of power and vehicle dynamics;
Electrical diagram of VAZ-2112
Designations: 1 – Headlight, 2 – Klaxon, 3 – Main radiator fan, 4 – Starter, 5 – Battery, 6 – Generator 2112, 7 – Gearbox limit switch (reverse), 8 – Actuator in the front passenger door, 9 – Power window enable relay, 10 – Starter relay, 11 – Heater fan, 12 – Electric heater partition drive, 13 – Main pump, 14 – Washer reservoir sensor, 15 – Driver’s door actuator, 16 – Front passenger window selector, 17 – Unlock button fifth door, 18 – Heater fan resistance unit, 19 – Main wiper motor, 20 – Driver’s window lift selector, 21 – Front passenger’s window lift motor, 22 – Central locking, 23 – Exterior light switch, 24 – Brake fluid leakage sensor, 25 – Pump additional, 26 – Driver's window lift motor, 27 – PTF on indicator, 28 – PTF switch, 29 – Dashboard, 30 – Heated glass on indicator, 31 – Heated glass switch, 32 – Steering column selector switch, 33 – PTF relay, 34 – Ignition switch, 35 – Main fuse block, 36 – Illumination of heater controls, 37 – Hazard warning button, 38 – Heater control controller, 39 – Glove compartment lighting, 40 – Glove compartment lid end cap, 41 – Cigarette lighter, 42 – BSK – display unit, 43 – Ashtray illumination, 44 – 12V socket, 45 – Instrument lighting switch, 46 – Actuator in the right rear door, 47 – Right rear passenger window selector, 48 – Clock, 49 – Right rear passenger window motor, 50 – Brake limit switch (closed – pedal is pressed), 51 – Left rear passenger window motor, 52 – Left rear passenger window selector, 53 – Actuator in the left rear door, 54 – Turn signal, 55 – Handbrake limit switch (closed – handbrake on), 56 – Rear wiper motor , 57 – Navigator's lamp, 58 – Interior lamp, 59 – Temperature sensor in the heater, 60 – Limit switch for the open front door, 61 – Limit switch for the open rear door, 62 – Trunk light, 63 – Rear optics (on the body), 64 – Rear optics (on the fifth door), 65 – License plate illumination.
The letters indicate the terminals to which it is connected: A – Front speaker on the right, B – Radio, C – Injector harness, D – ESD diagnostic connector, D – Front left speaker, E – Diagnostic connector for the heater controller, G – Rear right speaker, W – Rear left speaker, I – BC connector, K – glass heater thread, L – fifth door actuator, M – Additional brake light.
Wiring diagram VAZ-2112 injector 16 valves - full view
Speed sensor (DS)
The speed sensor of the Niva car is installed in the transfer case. The function of the sensor is to transmit vehicle speed readings. The sensor also forms the fuel mixture; when the car is moving at neutral speed, you can notice that the speed is slightly higher than when the car is running at XX while standing still. Increased speed when driving is necessary to avoid dips when turning on the speed and sharp acceleration.
Signs of DS malfunction:
- Increased fuel consumption;
- There are no increased speeds when driving at neutral speed;
- Dips during acceleration;
- The speedometer does not work;
Oxygen sensor (DC, lambda probe)
An oxygen sensor, also known as a lambda probe, is installed in the exhaust system of a car. In some versions of cars, two sensors are installed before the catalyst and after the catalyst. Two sensors are installed in Niva with EURO-4 standards. The sensor captures exhaust gases and transmits readings to the ECU. If there is a large amount of unburned gasoline in the exhaust gases or, on the contrary, a small amount, then the DC makes changes to adjust the fuel mixture.
Signs of DC malfunction:
- Increased fuel consumption;
- Loss of vehicle dynamics;
- Poor engine starting;
Ignition module (IZ)
The ignition module is installed on the left side of the engine on a bracket. This sensor is involved in the formation of ignition. It is this that produces the high-voltage voltage necessary to create a spark in the combustion chamber of the internal combustion engine. The module has two coils, they are also autotransformers, which produce a spark in pairs, each coil for two cylinders. If one of the coils fails, two cylinders fail at once.
Signs of malfunction of the MH:
- Troubles the engine;
- Increased fuel consumption;
- Increased engine vibrations;
- Loss of traction and dynamics;
