ECU VAZ 2107 injector: brands, functions, diagnostics, errors
Today you will not surprise anyone with electronic devices and mechanisms. Even the good old VAZ 2107 in our time cannot be imagined without an on-board computer. Why this device is needed in the design of the "seven", what role it plays and why drivers are used to relying on its performance - let's talk in more detail.
On-board computer VAZ 2107
An on-board computer is a “smart” digital device that performs certain calculation operations, receiving data from various sensors. That is, a “board” is a device that collects all the necessary information about the “well-being” of car systems and converts it into signs understandable to the driver.
Today, two types of on-board computers are installed on cars of all types:
- Universal, which include both specific technical devices and a multimedia system, Internet gadgets and other functions for the convenience and comfort of the driver.
- Narrowly targeted (diagnostic, route or electronic) - devices that are responsible for a strictly defined number of systems and mechanisms.
The first on-board computers appeared in the late 1970s. The active introduction of "bortovik" in the design of the car began in the 1990s. Today, these devices are simply called an ECU - an electronic control unit.
What ECU is on the VAZ 2107
Initially, the VAZ 2107 was not equipped with on-board devices, so drivers were deprived of the opportunity to receive operational data on the state of the vehicle's systems. However, later versions of the "seven" with an injection engine already have to install this device.
Factory models of the VAZ 2107 (injector) were not equipped with an ECU, but had a special mounting socket for the device and connectivity options.
The injector model of the "seven" has many different electronic components. Any driver knows that sooner or later one of these components may start to malfunction or fail. At the same time, self-diagnosis of a breakdown in such cases is very difficult - again due to the complexity of the electronic systems of the VAZ 2107. And installing even a standard ECU model will allow you to receive data on breakdowns in a timely manner and quickly fix the malfunctions with your own hands.
Thus, on the VAZ 2107, you can install any typical on-board computer that fits in design and connectors:
- Orion BK-07;
- "State X-23M";
- "Prestige V55–01";
- UniComp - 400L;
- Multitronics VG 1031 UPL and other varieties.
The main functions of the ECU for the VAZ 2107
Any on-board computer installed on the VAZ 2107 must perform the following functions:
- Determine the current vehicle speed.
- Determine the average driving speed for the selected segment of the journey and for the entire trip.
- Set fuel consumption.
- Control the running time of the motor.
- Calculate the distance travelled.
- Calculate the time of arrival at the destination.
- In the event of a failure in the auto systems, immediately signal the problem to the driver.
Any ECU has a screen and indicators that are inserted into the center console in the car. On the screen, the driver sees a display of the current performance of the machine and can control certain components.
The on-board computer on the VAZ 2107 is located immediately behind the instrument panel, connecting to the car's sensors. The screen or indicators are displayed directly on the dashboard for the convenience of the driver.
Diagnostic connector
The ECU on the "seven", as well as on other cars, is also equipped with a diagnostic connector. Today, all connectors are manufactured according to a single OBD2 standard. That is, the "on-board" can be checked for errors and malfunctions using a conventional scanner with a standard cord.
What is it for
The OBD2 diagnostic connector is equipped with a certain number of contacts, each of which performs its own function. By connecting the scanner to the ECU connector, you can carry out several diagnostic modes at once with high accuracy:
- view and decode error codes;
- study the characteristics of each system;
- clean "unnecessary" information in the ECU;
- analyze the operation of auto sensors;
- connect to the execution mechanisms and find out their remaining resource;
- View system metrics and history of previous errors.
Where is
The diagnostic connector on the VAZ 2107 is located in the most convenient place for work - under the glove compartment in the cabin under the dashboard. Thus, there is no need to disassemble the mechanisms of the engine compartment in order to connect the scanner to the ECU.
Errors issued by the ECU
The electronic on-board computer is a complex and at the same time very sensitive device. It is considered a kind of "brain" in the design of any car, as it is responsible for all the processes occurring in the systems. Therefore, it is very important to periodically diagnose the “well-being” of your “on-board vehicle” so that all errors issued by it are not disregarded.
What is an ECU error
As mentioned above, modern control units determine a variety of errors: from a lack of voltage in the network to the failure of one or another mechanism.
In this case, the signal about the malfunction is given to the driver in encrypted form. All error data is immediately entered into the computer memory and stored there until it is deleted through a scanner in the service station. It is important that existing errors cannot be removed until the cause of their occurrence is eliminated.
Decoding error codes
The VAZ 2107 ECU can detect several hundred of a wide variety of errors. The driver does not need to know the decoding of each of them; it is enough to have a reference book or a gadget connected to the Internet at hand.
Table: list of error codes VAZ 2107 and their interpretation
| Error code | Value |
| R0036 | Faulty oxygen sensor heater circuit (bank 1, sensor 2). |
| R0363 | Cylinder 4, misfiring detected, fuel cut off in idle cylinders. |
| P0422 | The efficiency of the neutralizer is below the threshold. |
| P0500 | Incorrect vehicle speed sensor signal. |
| P0562 | Reduced voltage of the on-board network. |
| P0563 | Increased voltage of the on-board network. |
| P1602 | Loss of voltage on-board network in the controller. |
| P1689 | Erroneous code values in the controller error memory. |
| P0140 | The oxygen sensor circuit after the converter is inactive. |
| P0141 | The oxygen sensor after the converter, the heater is faulty. |
| P0171 | The fuel supply system is too poor. |
| P0172 | The fuel supply system is too rich. |
| P0480 | Fan relay, control circuit open. |
| P0481 | Cooling fan 2 circuit malfunction. |
| P0500 | The vehicle speed sensor is faulty. |
| P0506 | Idle system, low engine speed. |
| P0507 | Idle system, high engine speeds. |
| P0511 | Idle air control, control circuit is faulty. |
| P0627 | Fuel pump relay, open control circuit. |
| P0628 | Fuel pump relay, control circuit short to ground. |
| P0629 | Fuel pump relay, control circuit short circuit to on-board network. |
| P0654 | Instrument cluster tachometer, control circuit faulty. |
| P0685 | Main relay, control circuit open. |
| P0686 | Main relay, control circuit short to ground. |
| R1303 | Cylinder 3, catalytic converter critical misfire detected. |
| P1602 | Engine management system controller, power failure. |
| P1606 | Rough road sensor circuit, signal out of range. |
| P0615 | Check for open circuit. |
Based on this table, you can accurately determine the cause of the error signal. It is important that the on-board computer rarely makes mistakes, so you can safely rely on the codes received.
Video: how to respond to a Check error
ECU firmware
The firmware of the electronic control unit is an opportunity to expand the capabilities of your “on-board vehicle” and make its work more efficient. I must say that the first versions of programs for firmware (or chip tuning) VAZ 2107 appeared back in 2008.
For most owners of the “sevens”, software chip tuning is simply necessary, since this operation allows you to:
- improve the performance of the machine in all respects;
- optimize the functions of the computer;
- reduce fuel consumption;
- prolong engine life.
ECU firmware must be performed exclusively at a service center and after a complete technical inspection of the motor by specialists. For this procedure, special service equipment is provided. Self-firmware can be performed only with experience and modern devices.
Video: how to flash an ECU on a VAZ 2107 yourself
The VAZ 2107 ECU can be considered a device that will allow you to quickly monitor the operation of all vehicle systems and timely troubleshoot. Of course, there is no special need to install an on-board vehicle on your car: the “seven” already quite tolerably fulfills all the obligations assigned to it. However, the ECU helps the driver to notice malfunctions and wear of mechanisms in time and quickly respond to them.
