Troubleshooting "January-4". Free Technical Library article

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Troubleshooting "January-4". Reading fault codes

Free technical library

Encyclopedia of radio electronics and electrical engineering / Automobile. Electronic fuel injection

Comments on the article

The procedure for reading fault codes from the RAM (random access memory) of the controller is similar to the procedure for the GM controller and is valid for all vehicles equipped with the January-4 engine management system. This article discusses diagnostic methods using the example of a VAZ-21093-20 car.

Troubleshooting "January-4". Reading fault codes

On the dashboard of vehicles equipped with this fuel injection system, a malfunction indicator lamp "CHECK ENGINE" is installed. It lights up when the ignition is turned on for 0.6 seconds. and signals about its serviceability and operability of system diagnostics. If there are temporary errors in the operation of the injection system, the control lamp "CHECK ENGINE" lights up for at least 10 seconds.

When a malfunction is detected, the controller stores its code in RAM and lights up the "CHECK ENGINE" lamp, which indicates the need for diagnostics and troubleshooting. In the memory of the Electric Control Unit, a two-digit error code is stored ( 12-99 ), which is indicated by this lamp when the self-diagnosis code output mode is initialized. Erasing error codes in the RAM of the controller occurs when the power is turned off. If you need to erase them, it is necessary to disconnect the positive terminal of the battery for 10-15 seconds with the ignition off. Accordingly, self-diagnosis should be carried out at least 10-20 minutes later. vehicle operation (better at different loads), after the last battery disconnection. --- ATTENTION --- If the battery is disconnected, the presets of critical additional devices (radio, alarm, etc.) may be lost. In this case, you can simply turn off the fuse of the Electrical Unit if no critical devices are connected to this circuit. Otherwise, you can remove the connector from the Electric Block itself. In addition, correction codes will be lost in the RAM, and until they are restored (up to 30 minutes of operation), it is worth refraining from dynamic driving and sudden accelerations.

Diagnostic connector

Troubleshooting "January-4". Reading trouble codes. ALDL Connector

A	Grounding
B	Code reading initialization
F	TCC (may not be)
G	Fuel pump control
H	Data rate
M	Serial code

To initialize the mode of issuing diagnostic codes, it is necessary, when the ignition is off, to close the contacts " А " And " В "Diagnostic connector or contact"В"on the car body and turn on the ignition without starting the engine. The error code is displayed by flashing the "CHECK ENGINE" lamp in sequential form - first the high order, then (after a pause) the low one. For example: flash, pause, flash, flash will correspond to the code"12" - self-diagnosis performance. When this mode is initialized, the indicator will first give the code "12" and then three times each fault code. If the code is not displayed at the beginning of the test " 12 ", means a malfunction in the Electric Control Unit itself. If there are no fault codes in the controller's memory, the "CHECK ENGINE" lamp will continue to display the code " 12 ". In addition, in the code scan mode, the engine cooling fan relay and the air conditioning clutch relay (if installed) can be turned on, and the idle air control is set to stop additional air supply.

Controller diagnostic codes indicated by the "CHECK ENGINE" lamp

* 13 - Low signal lambda probe

14 - Coolant temperature sensor signal low

15 - High coolant temperature sensor signal

16 - Overvoltage of the on-board network

17 - Undervoltage of the on-board network

19 - Signal error crankshaft position sensor

21 - High signal level throttle position sensor

22 - Low signal throttle position sensor

* 23 - Intake air temperature sensor signal high

24 - No signal vehicle speed sensor

* 25 - Intake air temperature sensor signal low

* 26 - Intake air temperature sensor signal high

27 - High signal level CO potentiometer

28 - Low signal CO potentiometer

33 - Signal error air flow sensor (high frequency)

34 - Signal error air flow sensor (low frequency)

35 - Error crankshaft speed signal at idle

* 38 - Lambda probe signal error

* 41 - Phase sensor signal error

43 - Knock sensor signal error

* 44 - Lambda probe signal error when the fuel mixture is lean

* 45 - Lambda probe signal error when the fuel mixture is enriched

51 - Read-only memory error

52 - Random access memory error

* 53 - EEPROM error

* 54 - Octane corrector error

* 55 - Electronic control unit error

* 61 - immobilizer error

Codes marked with "*" may not be used, and the corresponding sensors may not be installed.

It should be noted that the error codes read do not always clearly indicate a malfunction of any sensor or element of the injection system. When diagnosing, you should compare the controller data, the constructive response of the sensors and the specific behavior of the engine at idle and under load. Because the injection control system is constantly being improved, some fault codes may be missing in the table.

After reading the error codes, turn off the ignition and after 10-15 seconds. remove the jumper on the diagnostic connector.

Publication: cxem.net

See other articles Section Automobile. Electronic fuel injection

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

Full color OLED WUXGA microdisplay 07.11.2021

eMagin, which specializes in developing, designing and manufacturing high-resolution active matrix OLED microdisplays for AR and VR headsets and other applications where the display is close to the eyes, has unveiled a WUXGA (1920 x 1200 pixels) resolution prototype. It uses Direct Patterning Display (dPd) technology to achieve a record high brightness of 10 cd/m000. According to the manufacturer, this is the world's brightest high-resolution full-color OLED microdisplay.

"This is a historic moment for eMagin and the industry, and our biggest achievement to date in the development of our proprietary dPd technology," eMagin CEO Andrew G. Sculley described the prototype. "Applying direct framing to displays WUXGA, we've achieved a peak brightness of over 10 cd/m000 and rich RGB colors, a 2x improvement over our standard XL microdisplays on white OLEDs with a color filter and three to four times the performance of our new XLE microdisplays , and we believe it is the world's brightest high-resolution full-color micro OLED display, and we are working with a first-tier customer company on this development, including finding ways to produce it commercially.

The illustration on the left shows the structure of a microdisplay on white OLEDs with a color filter, on the right - the structure of a microdisplay that uses dPd technology.

"The 10 cd/m000 full-color brightness is an important milestone on our journey to full-color displays in excess of 2 cd/m28 by mid-000," added Scully. "In comparison, a typical laptop monitor delivers 2 cd/m2023 brightness, and a quality smartphone is as low as 250 cd/m2.In addition, our dPd displays contain over 1000 individually addressable pixels per inch (ppi) for remarkable clarity and resolution compared to typical 2 ppi laptop screens and OLED screens. smartphones with a resolution of 2500 pixels per inch.

News feed of science and technology, new electronics

We recommend downloading in our Free technical library:

▪ website section Data transfer

▪ magazines EKiS, Electronic components and systems (annual archives)

▪ book Household radio and sound-reproducing equipment. Directory. Alekseev Yu.P., 1994

▪ article by Ghazali (Abu-Hamid Muhammad ibn-Muhammad al-Ghazali). Famous aphorisms

▪ article Digital tape recorder. Encyclopedia of radio electronics and electrical engineering

▪ article Electronic key K1233KT2. Encyclopedia of radio electronics and electrical engineering

▪ collection Archive of diagrams and service manuals for Fly Bird mobile phones

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews