Composition and design features of the "Hyundai ECFI" ECM

Accent/Pony/Excel cars 1994-2000 release with the G4K engine (1.5 l, 12- or 16-valve (12V - SOHC and 16V - DOHC)) are equipped with electronic system engine management system (ECM) "Hyundai ECFI". This is a Motronic type integrated control system with feedback on a zirconium oxygen sensor.

Automatic regulation is carried out according to three parameters:

By the quality of the fuel mixture, providing a range of regulation of the excess air ratio within 0.97 - by the number of revolutions idle move(XX), providing the number of revolutions XX 800 ± 100 rpm in all engine operating modes;

By knock, by using the knock sensor (KS) and the corresponding injection control module (ECM) control program to change the ignition timing until the knock stops. This allows you to adapt the system to the quality of filled gasoline and to the state of the electromechanical parameters of the engine.

The ECM "Hyundai ECFI" has self-diagnostic tools that provide the formation, saving and reading-erasing of diagnostic error codes.

Rice. 1. circuit diagram ECM "Hyundai ECFI" 12V

Rice. 2. Schematic diagram of the ECM "Hyundai ECFI" 16V

Ecological systems"Hyundai ECFI", including EVAP and an aftertreatment system, provide an exhaust gas composition that complies with Euro 2 toxicity standards:

Schematic diagrams of the Hyundai ECFI ECM for 12- and 16-valve engines are shown in fig. 1 and 2, respectively.

In the wiring diagrams of Hyundai cars, the following wiring markings are adopted: bl-blue - blue, gn-green - green, rs-pink - pink, ws-white - white, x-braided cable - shielded cable, br-brown - brown, gr- gray - gray, rt-red - red, hbl-liht blue - blue, y-high tension - high-voltage (candle) wire, el-cream - cream, nf-neutral - colorless, sw-black - black, hgn-light green - light green, ge-yellow - yellow, og-orange - orange, violet - purple, rbr-maroon - burgundy.

On fig. 3 and 4 show the location of the elements of the injection system on the car body Hyundai Accent/Pony/Excel for 12- and 16-valve engines respectively.

Rice. 5. Mounting Hyundai blocks Accent/Pony/Excel Fragment 5a: 5 - diagnostic connector (DLC), 6 - ECM, 7 - ECM main relay (K46), 8 - fuel pump, 9 - mounting block No. 1, 10 - mounting block No. 2, 11 - mounting block in engine compartment, 9 -TSM.

Fragment 5b: F4 - fusible link battery circuit protection, 5 - generator circuit protection fuse, F6 - ignition system circuit protection fuse, F9 - injection system circuit protection fuse.

Fragment 5c: F3 - ECM circuit protection fuse, F4 - TCM circuit protection fuse.

Fragment 5g: 1 - relay fuel pump(K20), 3 - starter relay.

Table 1. Hyndai ECFI ECM test data

Rice. 6. Hyundai ECFI ECM control waveforms

On fig. 5 shows the location of the components of the injection system, as well as the relays and fuses of the electrical circuits of the injection system in the mounting blocks.

Checking the parameters of the injection control unit "Hyundai ECFI"

In table. 1 shows the procedure for checking the injection control unit "Hyundai ECFI".

The data in the table is organized into groups to provide "system" in the control unit check. The sequence for checking the functions of the ECM is as follows:

ECM support functions (power supply, immobilizer, synchronization, sensors);

Executive functions (relay control, ignition, injectors, XX, lambda control and additional devices).

On fig. 6 shows the control waveforms of ECM "Hyundai ECFI".

Self-diagnosis of ECM "Hyndai ECFI"

ECM "Hyundai ECFI" has self-diagnostic tools corresponding to OBD protocol II, and also provides support for the manufacturer's diagnostic protocol. It also provides verification of the generated signals for compliance with the real range and logical validity. If the diagnostic program detects some kind of discrepancy (the sensor signal does not fit into the real range or contradicts the signal from another sensor, there is no power supply, etc.), one or more corresponding fault codes are recorded in the error memory, and on dashboard the ECM error indicator turns on. In addition, the condition is controlled diagnostic equipment.

Rice. 7. Hyundai ECFI self-diagnosis

Error codes can be read using special diagnostic equipment or manually * in the following sequence:

With the ignition off, collect diagnostic scheme(see Fig. 7a, 7b);

Turn on the ignition and close pin 15 of the DLC connector to ground for 2.5.7 seconds, read the DTC code by flashing the "MIL" indicator;

The indication of each DTC includes two groups of flashes, in each of which there are from 1 to 9 flashes "MIL" (see Fig. 7c - an example of displaying the DTC code "12");

A long flash in the DTC code means "tens" (see fig. 7c-A), and a short one - "ones" (see fig. 7c-C);

Short pauses between "MIL" flashes separate the digits of the same DTC (see Fig. 7b-C), long pauses separate different DTCs (see Fig. 76-D).

Clearing the memory of the ECM that stores diagnostic information can also be performed either using the special HYUNDAI diagnostic equipment or manually in the following sequence:

With the ignition off, disconnect the "earth" battery bus (it should be remembered that disconnecting the battery will clear the volatile memory of the "electronic filling" of the car - radio, clock, etc.);

Maintains a pause of 15.20 s;

Connect battery.

Table 2. Hyundai ECFI ECM Diagnostic Error Codes

Code hyundai errors		Code OBD errors Hyundai	Equipment under test	Possible cause of malfunction
2 digit	4 digit
			MAF sensor	Wiring connections, MAF sensor, ECM
		P0095-P0099, P0110-P0114	IAT sensor	Wiring connections, IAT sensor, ECM
			ECT sensor	Wiring connections, ECT sensor, ECM
		P0120-P0124, P0220-P0233		Wiring connections, TP sensor, ECM
		P0030-P0032, P0036-P0044, P0050-P0064, P0130-P0147, P0150-P0167	HO2S sensor, catalytic converter	Wiring connections, catalytic converter or HO2S poisoning, ECM
	3112, 3116, 3234, 3235	P0201-P0204, P0261-P0271	nozzles
		P0087-P0088, P0148-P0149, P0313, P0363, P1123, P1124, P1127, P1128	Fuel system	Field connections, component failures fuel system
		P0320-P0323, P0335-P0339, P0385-P0389	CKP sensor
		P0010-P0025, P0340-P0349, P0365-P0369 P0390-P0394	CMP sensor	Wiring connections, CKP sensor, ECM
				Wiring connections, KS sensor, ECM
		P0440-P0459, P0465-P0469, P0496-P0499	EVAP valve	Wiring connections, EVAP valve, ECM
	3114, 3122, 3144	P0506-P0511, P1518-P0519, P1552, P1553	IAC valve	Field connections, IAC valve, ECM
			Ignition system	Mounting connections, malfunctions of ignition system components.
		P0562, P0563, P0685-P0690	Power supply system	Main power relay, fuel pump relay, wiring harness, ECM
	1122, 1233, 1234, 3241-3243, 4133	P0601-P0609, P0614, P0630-P0633, P0642 P1665, P1670		Wiring connections, power system faults, ECM
		P0500-P0503, P0720-P0723	VSS sensor	Wiring connections, VSS sensor, ECM
		P1586, P1624, P1605, P1606	Control transmission, suspension	Mounting connections TCM, ECM
	3133, 3138, 3149, 3221		Air conditioner control	Mounting connections ECM/AC, ECM

In table. 2 shows the main error codes that are relevant for the Hyundai ECFI ECM (moreover, homogeneous errors are combined into groups).

* Only for 2-digit DTCs according to the manufacturer's protocol.

.
asks: Smirnov Kirill.
Essence of the question: How to reset the "CHECK"?

Hello! I have a Hyundai Solaris, and the "check" light is constantly on! I already went to the station Maintenance and found out what the problem is. The first time they dropped it to me, and now it has appeared again, while the behavior of the machine has not changed in any way. Tell me, please, how can I reset it myself, because I don’t want to pay for it again in the service.

Diagnosing errors on the Hyundai Solaris

If the CHECK light comes on when starting the engine, then there is no need to worry. But if the check is on when the engine has already started, then you need to find out the cause of the error.

Diagnostics and removal of errors that occur on the Hyundai Solaris may be needed by the owner of the vehicle in different situations when there is no desire to do this work in a certified service center.

It is not difficult to do this work, the main thing is to know that you can remove it yourself errors related to the first level , that is, those that are not recorded in the memory of the computer, which do not significantly affect the operation of the car and its devices. Since only a special dealer device (scanner - approx.) can remove such errors, one of these errors is a car airbag error.

When are errors removed on their own?

Among all the important problems on the Hyundai Solaris, some can be reset on their own after one or another repair.

For example, error codes with 301 By 304 , indicating a spark gap in one of the cylinders (the last digit of the error refers specifically to the cylinder - approx.).

If the error indicates a misfire in the cylinder, first look at the condition of the spark plug. In the photo, the candle is the culprit of this error.

Accordingly, when these gaps are detected, the ECU will give a signal in the form of a burning “CHECK”, which cannot be removed without erasing the code or resetting the terminal from the battery.

This error is completely removed, only by replacing the non-working candle with a new one, after which the error will disappear by itself.

Self reset check for Hyundai Solaris

It is possible to reset errors on your own on a Hyundai Solaris thanks to the OBD-II protocol and the presence of a special adapter with a diagnostic device, whether it is a smartphone or a computer that supports the technology wireless communication Bluetooth.

In order to check the errors on the car, perform the following steps:

Standard window for checking and clearing errors of the Scan Master program

The process of diagnosing and resetting errors without OBD-II

On Hyundai Solaris, you can diagnose and remove errors without even having any additional devices at hand.

Diagnostics (this method does not work)

The method described below runs all over the Internet. We tested on our drafting machine. He does not work. We do not delete the method, as some owners may think that it works.

Video disclaimer:

Removing errors

• In order to remove the error, it is necessary to do the entire above-mentioned course of work from points 1 to 5, and without turning off the ignition, press the "gas" again.
• After that, turn off and turn on the ignition, start the engine.
• If the progress of the work was done correctly, the error should be removed.

As you can see for yourself, there is nothing difficult in removing an error on a Hyundai Solaris on your own.

On the video, the check is on and the Hyundai Solaris stalls

car models
Model	Engine		years	System
Accent 1.3i SOHC	-		1995-1997	Hyundai MR
Accent 1.5i SOHC	-		1995-1997	Hyundai MPi
Coupé 1.6DOHC16V	G4GR		1996-1997	Hyundai MPi
Coupé 1.8OOHC16V	G4GM		1996-1997	Hyundai MPi
Coupé 2.0 DOHC 16V	G4GF		1996-1997	Hyundai MPi
Lantra 1,5i SOHC cat	4G15/G4J		1993-1995	Hyundai MPi
Lantra 1,6i OOHC cat	4G61		1991-1995	Hyundai MPi
Lantra 1.6 DOHC 16V	G4GR		1996-1997	Hyundai MPi
Lantra 1,8i DOHC cat	4G67		1992-1995	Hyundai MPi
Lantra 1.8 DOHC 16V	G4GM		1996-1997	Hyundai MR
Pony X21.5S SOHC cat	4G15/G4J		1990-1994	Hyundai MPi
S Coupe 1.5i SOHC cat	4G15/G4J		1990-1992	Hyundai MR
S Coupé 1.5i SOHC	Alpha		1992-1996	Bosch Motronic М2.10.1
S Coupe 1,5i turbo SOHC	Alpha		1992-1996	Bosch Motronic M2.7
Sonata 1.8 SOHC	4G62		1989-1992	Hyundai MPi
Sonata 2.0 SOHC	4G63		1989-1992	Hyundai MPi
Sonata 2.016V DOHC	-		1992-1997	Hyundai MPi
Sonata 2.4 SOHC	4G64		1989-1992	Hyundai MPi
Sonata 30 SOHC	V6		1994-1997	Hyundai MR

Introduction

Hyundai cars equipped with control systems Bosch Motronic versions 2.7, 2.10.1 or Hyundai MPi. All systems control the primary purpose of the ignition system, fuel injectors and idle system from one module.

Self-diagnosis function

The engine management system (CUD!) has a self-diagnosis function that continuously analyzes the signals of sensors and actuators of the engine, and compares them with reference values. If the diagnostic program detects any discrepancy, it electronic control[BZU] one or more corresponding fault codes are recorded. Codes will not appear when defective element is not under the control of the SUD when the failure situation is not foreseen by its software.

The Hyundai MPi system generates 2-digit fault codes that can be retrieved either manually or with a reader. IN Bosch systems Motronic M2.7 and M2.10.1 4-digit codes are generated for manual extraction, and 2- or 3-digit codes for the reader. The meanings of the codes are given at the end of the chapter. Limited controllability strategy

The Hyundai systems described in this chapter have a limp home mode [a feature known as 'limp home' or 'limp home']. This means that in the event of some malfunctions (not all malfunctions cause this mode to be activated), the engine control system begins to be guided not by the sensor readings, but by its reference value. This mode allows the car to get to the garage or service station for inspection and repair, albeit with less efficiency. Once the fault has been corrected, the system returns to normal operation.

adaptive function

Hyundai systems are adaptable, whereby the programmed values ​​for certain sensors and actuators change during operation, taking into account engine wear, to achieve maximum efficiency.

Fault light

Most Hyundai models are equipped with a warning light located on the instrument panel. If the light does not go out or lights up at some point while the engine is running, then the diagnostic system has detected a malfunction. The warning light on some vehicles can also be used to retrieve trouble codes.

Location of the diagnostic connector

All Hyundai models

The diagnostic connector is located in the fuse box on the driver's side or under the dash [see illustration]. rice. 14.1,14.2). The diagnostic connector allows you to retrieve codes both manually (flashing light) and using a reader.

Extracting codes

without the aid of a reader (“flashing” codes)

Note: During the performance of some checks, additional fault codes may occur. Be very careful when performing checks so that these codes do not mislead you. After testing, all fault codes must be erased.

Hyundai MPi bases signal light(voltmeter method)

1. Connect an analog voltmeter to sockets A and B of the diagnostic socket (see Fig. 14.2).
2. Turn on the ignition.
3. If there are fault codes in the BEU memory, the voltmeter needle will begin to oscillate between the upper and lower levels. Arrow deviations should be interpreted as follows.
4. The first series of oscillations displays tens, the second series - units.
5. When displaying tens, the arrow deviates for a longer period than when displaying units. If the system has not registered any malfunctions, the arrow will oscillate uniformly.
6. Count the number of arrow deflections in each series and write down the codes in the order in which they appear. To decipher the meaning of the codes, refer to the table at the end of the chapter.
7. To complete the reading of the codes, turn off the ignition and disconnect the voltmeter.

Hyundai MPi signal light bases (LED method)

1. Connect the LED to sockets A and B of the diagnostic connector (see Fig. 14.3).
2. Turn on the ignition.
3. After about 3 seconds, the LED will flash codes as follows.
4. Two digits of the code are displayed by two series of flashes.
5. The first series of flashes depicts tens, the second series - units.
6. Tens are displayed by 1.5 second flashes at 0.5 second intervals, and units by 0.5 second flashes at 0.5 second intervals.
7. Codes are separated from one another by pauses of 2 seconds.
8. Code ‘42’ is displayed with four 1.5 second flashes, a 2 second pause and two 0.5 second flashes.

Count the number of flashes in each series and write down the codes in the order in which they appear. To decipher the meaning of the codes, refer to the table at the end of the chapter.

• The codes will appear in sequence and repeat after a 3-second pause.
• The appearance of eight uniform 0.5-second pulses, which will repeat after 3 seconds, means that the system has not detected any malfunctions.
• To complete the reading procedure, turn off the ignition and turn off the LED.Hyundai MPi with warning light
  1. Turn on the ignition.
  2. Short jumper sockets A and B of the diagnostic connector (see Fig. 14.4).
  3. After about 3 seconds, the signal light will start flashing the codes in the same way as the LED (see points 8-11 above).
  4. To complete the reading procedure, turn off the ignition and remove the jumper.

Bosch Motronic M2.7 and 2.10.1

Note. The 4-digit codes obtained with the flashing light may differ from those obtained with the reader. Be careful when using the table at the end of the chapter - use the "flashing code" column.

Deleting codes from memory without the help of a reader

Bosch Motronic 2. Yu. 1 and M2.7

1. Retrieve the codes by the method described above until the code ‘3333’ appears.
2. Short for 1 □ seconds of diagnostic connector A and B, the codes will be cleared.

Self-diagnosis using a code reader

Note: Some checks may generate additional fault codes. Be

be very careful when carrying out checks so that these codes do not mislead you.

For all Hyundai models

1. Connect the reader to the diagnostic socket [see rice. 14.6). Use the reader for the following circuits, following the manufacturer's instructions:
2. Reading fault codes.
3. Erasing fault codes.
4. The reader is capable of reproducing both 4-digit flash codes and 2- or 3-digit reader-only codes. Be careful when deciphering the codes - use the correct column of the table.
5. Codes must be cleared after checking the components and after repairing or replacing any component of the engine management system.

Check order

• Using a signal light (where possible) or using a reader, retrieve fault codes from the ECU memory

There are fault codes in the memory of the control unit

• If one or more fault codes are stored in the memory of the control unit, determine their meanings according to the table at the end of this chapter.
• If several fault codes occur at once, check the components common to them, primarily the ground and power circuits.
• Perform tests as recommended in Chapter 4, which covers tests for most engine control systems.
• After eliminating the malfunction, erase its code from memory, start the engine and make sure that the malfunction does not occur again in all engine operating modes.
• Check the codes again. If the codes reappear, repeat all the above procedures.

1. Turn off the ignition and disconnect the negative cable from the battery for about 15 seconds.
2. Reconnect the battery. Comment. The first disadvantage of this method is that the BEU will reset all adapted parameter values ​​to their original state. In order to adapt the system to your engine again, you will need to start the engine from a low state, and then drive the car at different engine speeds for 20 ... 30 minutes. In addition, let the engine idle for about 10 minutes. The second disadvantage is that you will have to re-set the radio's security code, the current time value and other stored values, which will also be reset when the battery is disconnected. If possible, it is best to use a reader to clear the codes.

There are no fault codes in the memory of the control unit

• If there is doubt about the health of the engine, and there are no fault codes in the memory of the control unit, the reason is probably that the fault is in an area not controlled by the engine management system.

Fault code table

www.autodiagnostika.info

Hyundai Accent | Description of the principle of operation of the self-diagnosis system and the procedure for reading fault codes

Description of the principle of operation of the self-diagnosis system and the procedure for reading fault codes

Access to the information stored in the PCM memory about fixed system failures is possible using either the ignition key or a special DRB II diagnostic code reader. This device is connected to the diagnostic connector located in the engine compartment. In this case, fault codes and parameters are displayed on the reader's display screen. However, the DRB II scanner is quite expensive and most amateur mechanics prefer to use it. alternative method. Negative side the method of reading fault codes using the ignition key is the inability to display a complete list of codes. Most problems are usually solved or diagnosed quite easily, and if certain information cannot be obtained, you should seek help from a dealership or car service workshop, which has the necessary more sophisticated equipment.

To display fault codes using the ignition key, first cock parking brake and shift the transmission to the "P" position. Raise the engine speed to 2500 rpm, then slowly reduce the speed to idle. Briefly turn on (then turn off) the air conditioning system. Then, squeezing foot brake, sequentially move the selector lever through all positions (Reverse, Drive, Low, etc.), ending again in the “P” (Park) position. This will allow the module processor to fix the codes of all failures associated with sensors that respond to changes in the functioning of the transmission, engine (its speed) and air conditioner. To display fault codes with the CHECK ENGINE or MIL lamp, turn the ignition key sequentially to the ON, OFF, ON, OFF and again ON positions (the engine is turned off). After that, the lamp will begin to display the codes fixed in the PCM memory. First, the lamp will highlight the first digit of the two-digit code, then, after a pause, the second. For example: code 23 (air temperature sensor circuit) will look like this: two flashes, a pause, three flashes. To enter a fault code into the memory of the engine control unit, certain conditions must be met. This can be a set value of engine speed, its temperature or voltage of the (input) signal coming to the controller. There is a possibility that when polling any of the circuits of the system, the code of the failure taking place in it will not be entered into memory. This can happen as a result of the absence of one of the criteria for the code of this malfunction (non-fulfillment of one of the conditions). For example: in order to adequately interrogate (in order to identify malfunctions) the MAP sensor circuit, the engine must operate at a speed of rotation within (750 - 2000) rpm. If the engine speed exceeds 2400 rpm, the output of the MAP sensor will be shorted to ground, which will not allow a fault code to be entered into the controller's memory. An absolutely opposite situation may also take place: a fault code of a completely different component of the system will be entered in the memory. For example: fuel pressure problems cannot be directly registered by the processor, however, they lead to over-leaning or over-rich air-fuel mixture, which causes the self-diagnosis system to enter a failure code in the circuit into the module memory oxygen sensor. You should always be aware of the mutual intersection of the spheres of action of various sensors and circuits, as well as the influence on each other of the results of the functioning of the power supply and emission control systems.

The table below is a list of codes for possible malfunctions and failures of the system that can be displayed during its diagnostics. In addition, the table lists the possible failures of each of the expected failures. If, after making all the corrections made on the basis of the results of this diagnostic, the situation does not return to normal, you should seek advice from the workshop of the dealership or car service.

Troubleshooting codes

Code 11	When the engine rotates, there is no reference signal from the distributor. Check circuit between distributor and PCM.
Code 12	Problem with battery contacts. There has been no direct battery power to the controller for at least 50 ignition cycles.
Code 13**	Indicates problems with the pneumatic (vacuum) system of the MAP sensor.
Code 14**	MAP sensor voltage too low or too high.
Code 15**	Problems with VSS signals. Sensor signals are not detected when the vehicle is moving.
Code 16	Loss of battery power.
Code 17	Engine stays cold for too long. The coolant temperature sensor detects a temperature below normal operating temperature during engine operation (check thermostat)
Code 21**	Problems in the sensor circuit O 2. There are no fluctuations in the voltage of the sensor on the processor.
Code 22**	Coolant sensor voltage too low or too high. Check sensor.
Code 23**	Talking about too low (below allowable value) or too high (above the allowable) level of the input signal of the air temperature sensor.
Code 24**	Too low or too high TPS voltage. Check sensor.
Code 25**	IAC motor circuit. There is a short circuit in one or more motor circuits.
Code 27	One of the injector control loops is not responding properly to control signals. Check contours.
Code 31**	The problem is in the charcoal canister purge solenoid circuit.
Code 32**	An open or short circuit was detected in the EGR solenoid circuit. Perhaps during the diagnostics, an imbalance in the composition of the air-fuel mixture was not detected.
Code 33	Air conditioning clutch relay circuit. An open or short circuit has been detected in the relay circuit.
Code 34	An open or short circuit has been detected in the circuits of the electromagnets of the vacuum speed control or ventilation.
Code 37	The circuit of the electromagnet of the clutch of the rotation converter. There is an open or short circuit in the circuit of the electromagnet opening part of the inductor of the rotation converter (AT only).
Code 41**	Problems in the charging system. Occurs when the battery voltage from the ASD relay drops below 11.75 V.
Code 42	An open or short circuit in the ASD relay control circuit has been detected.
Code 44	Incorrect battery temperature sensor voltage. Problems with battery temperature voltage circuit in PCM.
Code 45	Upshift solenoid. Identified problems in the circuit of the electromagnet.
Code 46**	Charging system voltage too high. The processor notifies of inadequate battery voltage regulation.
Code 47**	The charging system voltage is too low. While the engine is running, the measured battery input voltage is below the set charging voltage and no noticeable voltage changes were detected during an active test of the alternator output.
Code 51*	The output signal of the O 2 sensor indicates that the combustible mixture was depleted during the operation of the engine.
Code 52**	The output signal of the O 2 sensor indicates the re-enrichment of the combustible mixture during the operation of the engine.
Code 53	Internal fault PCM module.
Code 54	No encoder signal camshaft from the distributor. Problems with the distributor timing circuit.
Code 55	Completion of the process of reading fault codes with the CHECK ENGINE control lamp. Diagnostic mode exit code.
Code 62	Unsuccessful attempt correct the EMR mileage readings in the control unit memory.
Code 63	Failure of the control device. Denying a memory entry. Check RSM.

**These codes are displayed by the CHECK ENGINE lamp on the instrument panel when the engine is running while the DTC is being written.

automn.ru

Hyundai Accent | Diagnostic Trouble Codes

Diagnostic Trouble Codes (1.8/2.0L I4)

The codes given in brackets () apply only to vehicles equipped with an immobilizer.

	Malfunction
	Damage electrical circuit lower oxygen sensor
	Low level lower oxygen sensor signal
	High signal level of the lower oxygen sensor
	Damage to the electrical circuit of the heated oxygen sensor
	Random misfires
	Misfires in the 3rd cylinder
	Misfires in the 4th cylinder
	Low work efficiency catalytic converter
	Break in the electrical circuit of the activated carbon canister cleaning valve
	Short circuit of the activated carbon canister cleaning valve circuit
	Rich fuel mixture
	lean fuel mixture
	Damage to the transmission control unit
	Damage to the electrical circuit of the acceleration sensor
	Incorrect signal received from the acceleration sensor
	MIL warning light input low
	MIL indicator high input
	ECM signal error
	Malfunction
	Damage to the electrical circuit of the air flow meter sensor
	Low air temperature sensor signal
	High air temperature sensor signal
	Damage to the electrical circuit of the coolant temperature sensor
	Low coolant temperature sensor signal
	High coolant temperature sensor signal
	Damage to the electrical circuit of the position sensor throttle valve
	Throttle position sensor signal low
	Throttle position sensor signal high
	Damage to the electrical circuit of the oxygen sensor
	Low oxygen sensor signal
	High oxygen sensor signal
	Slow oxygen sensor response
	Poor Oxygen Sensor Performance
	Damage to the electrical circuit of the heated oxygen sensor
	Damage to the electrical circuit of the fuel system
	Damage to the electrical circuit of the fuel injector of cylinder 1
	Damage to the electrical circuit of the fuel injector of cylinder 2
	Damage to the electrical circuit of the fuel injector cylinder 3
	Damage to the electrical circuit of the fuel injector cylinder 4
	Damage to the electrical circuit of the knock sensor
	Damage to the electrical circuit of the angle sensor crankshaft
	Random malfunctions in the crank angle sensor
	Camshaft position sensor signal low
	High camshaft position sensor signal
	Damage to the electrical circuit of the vehicle speed sensor
	Reduced idle speed
	Increased idle speed
	Undervoltage in onboard network car
	Increased voltage in the vehicle's on-board network
	Internal damage to the ECM
	Rich fuel mixture
	lean fuel mixture
	Prolonged re-enrichment of the fuel mixture
	Prolonged lean fuel mixture
	The valve of the idle system is constantly open due to a short circuit in the electrical supply circuit of the valve coil
	The valve of the idle system is constantly open due to an open circuit in the electrical supply circuit of the valve coil
	The valve of the idle system is constantly closed due to a short circuit in the electrical supply circuit of the valve coil
	The valve of the idle system is constantly closed due to an open circuit in the electrical supply circuit of the valve coil
	Incorrect signal received from the gearbox
	Damage to the SMATRA immobilizer
	Immobilizer antenna damage
	Damage to the immobilizer pulse transceiver
	ECM signal error
	EEPROM corruption
	Damage to the torque reduction circuit
	Malfunction
	Damage to the heater circuit of the oxygen sensor (group 1, sensor 1)
	Damage to the heater circuit of the oxygen sensor (group 1, sensor 2)
	Low signal in the control solenoid circuit inlet valve(Group 1)
	High signal in the intake valve control solenoid circuit (group 1)
	Violation of the characteristics of the sensor of absolute air pressure
	Damage to the electrical circuit of the coolant temperature sensor
	Damage to the electrical circuit of the throttle position sensor
	Violation of the amplitude / characteristics of the throttle position sensor
	Low temperature coolant
	Delayed response of the oxygen sensor (group 1, sensor 1)
	Slow reaction of the oxygen sensor (group 1, sensor 2)
	Damage to the electrical circuit of the lower oxygen sensor (group 1, sensor 2)
	Low efficiency of the oxygen sensor (group 1, sensor 2)
	Damage to the electrical circuit of the heated oxygen sensor (group 1, sensor 2)
	Fuel system damage (Group 1)
	Damage to the electrical circuit of the fuel injector of cylinder 1
	Damage to the electrical circuit of the fuel injector of cylinder 2
	Damage to the electrical circuit of the fuel injector cylinder 3
	Damage to the electrical circuit of the fuel injector cylinder 4
	Damage to the electrical circuit of the fuel system
	Random misfires
	Misfires in the 1st cylinder
	Misfiring in the 2nd cylinder
	Malfunction
	Camshaft Position Actuator Circuit (Group 1)
	Damage to the intake valve control solenoid circuit (group 1)
	Damage to the electrical circuit of the absolute air pressure sensor
	Faulty air temperature sensor circuit
	Damage to the electrical circuit of the coolant temperature sensor
	Violation of the amplitude / characteristics of the coolant temperature sensor
	Damage to the electrical circuit of the throttle position sensor
	Damage to the electrical circuit of the oxygen sensor (group 1, sensor 2)
	High signal level of the oxygen sensor (group 1, sensor 2)
	Low efficiency of the oxygen sensor (group 1, sensor 1)
	Damage to the electrical circuit of the heated oxygen sensor (group 1, sensor 1)
	Violation of the amplitude / characteristics of the temperature sensor engine oil
	Low signal of the engine oil temperature sensor
	High engine oil temperature sensor signal
	Damage to the electrical circuit of the fuel injector of cylinder 1
	Damage to the electrical circuit of the fuel injector of cylinder 2
	Damage to the electrical circuit of the fuel injector cylinder 3
	Damage to the electrical circuit of the fuel injector cylinder 4
	Damage to the electrical circuit of the fuel system
	Damage to the electrical circuit of the knock sensor 1
	Damage to the electrical circuit of the crank angle sensor
	Damage to the electrical circuit of the camshaft position (CMP) sensor
	Damage to the electrical circuit of the control valve of the evaporative emission system
	Violation of the amplitude / characteristics of the vehicle speed sensor
	Violations in the on-board network of the car
	ECM Self Test Violations
	Incorrect idle control valve control signal (Coil 1)
	Incorrect idle control valve control signal (Coil 2)
	Sequential loss of communication with the transmission control unit (TCU)
	Disruption of communication with the anti-theft system
	Damage to the Smatra immobilizer antenna
	Damage to the impulse transceiver of the Smatra immobilizer
	Missing request from the anti-theft system
	Incompatible data from anti-theft system

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Home » New » How to do self-diagnosis Hyundai Accent

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Hyundai Accent | System self-diagnosis (OBD) and codes

On models from 1990 to 1994, the OBD1 self-diagnosis system is installed, and from 1995, the OBD2 self-diagnosis system is installed.

To determine the trouble codes in the OBD1 system, you simply need to disconnect the test connector located under the instrument panel. But to determine the fault codes in the OBD2 system, it is necessary to use a special device for viewing fault codes. To carry out diagnostics of the exhaust gas toxicity reduction system and engine control, it is advisable to use a digital voltmeter, which has a high input resistance and does not affect the operation of the circuit under test (see Fig. Digital voltmeter).

To determine fault codes and analyze engine management systems, it is necessary to use special scanners (see Fig. Scanner).

The ECM contains a built-in self-diagnostic system that detects and categorizes faults in electrical circuits. When the ECM detects a malfunction, the "check engine" warning lamp comes on, the malfunction is identified and the malfunction code is written to and stored in the memory.

There are four ways to self-diagnose engine problems. The "check engine" warning lamp lights up if there is a malfunction in the U-mode.

U-way is the most user-friendly.

A way to read memory. Designed for the maintenance department to check stored trouble codes.

D-way. Used to check for faulty parts.

Cleaning method. It is intended for removal of the written down codes of malfunction.

Fault codes in the OBD2 self-diagnosis system consist of five digits.

OBD2 Self-Diagnostic System Fault Codes

Fault codes	Electrical circuit or system	Probable Cause
Code 11 (one long flash, one short flash)	Crank angle sensor or circuit	No reason
Code 12 (one long flash, two short flashes)	starter switch	Starter switch stays permanently on or off
Code 13 (one long three short flashes)	Camshaft Angle Sensor	No reason
Code 14 (one long flash, four short flashes).	Fuel injector 1
Code 15 (one long flash, five short flashes).	Fuel injector 2	Fuzzy operation of the fuel injector
Code 16 (one long flash, six short flashes)	Fuel injector 3	Fuzzy operation of the fuel injector
Code 17 (one long flash, seven short flashes)	Fuel injector 4	Fuzzy operation of the fuel injector
Code 21 (two long flashes, one short flash)	coolant temperature sensor	Sensor or sensor circuit is malfunctioning
Code 22 (two long flashes, two short flashes)	Knock sensor
Code 23 (two long flashes, three short flashes)	Air flow sensor	Sensor circuit open or shorted
Code 24 (two long flashes, four short flashes)	Air control valve	Valve circuit open or shorted
Code 31 (three long flashes, one short flash)	Throttle position sensor	Sensor circuit open or shorted
Code 32 (three long flashes, two short flashes)	oxygen sensor	The electrical circuit of the oxygen sensor is broken
Code 33 (three long flashes, three short flashes)	Vehicle speed sensor	Missing vehicle speed sensor signal
Code 35 (three long flashes, five short flashes)	Purge solenoid valve	Purge solenoid valve permanently on or permanently off
Code 41 (four long flashes, one short flash)	Composition of the fuel mixture	Not optimal fuel mixture ratio
Code 42 (four long flashes, two short flashes)	Switch signal	Wrong switching signal
Code 44 (four long flashes, four short flashes)	damper actuator	Faulty damper actuator valve
Code 45 (four long flashes, five short flashes)	atmospheric sensor	Faulty atmospheric sensor
Code 49 (four long flashes, nine short flashes)	Air flow sensor	Faulty air flow sensor
Code 51 (five long flashes, one short flash).	Neutral switch	Neutral switch remains permanently on
Code 51 (five long flashes, one short flash)	Starter lock	Lockout switch remains permanently on
Code 52 (five long flashes, two short flashes)	Limit switch	Parking switch stays on permanently
	Malfunction
	faulty electrical circuit or air flow sensor (MAF)
	incorrect reading of the air flow sensor (MAF)
	air flow sensor (MAF) low voltage
	air flow sensor (MAF) high voltage
	Faulty electrical circuit or pressure sensor
	inaccurate reading of the pressure sensor
	pressure sensor low voltage
	pressure sensor high voltage
	Faulty electrical circuit or sensor
	low signal from the coolant temperature sensor (ECT)
	high signal from the coolant temperature sensor (ECT)
	electrical circuit or throttle position sensor (TPS) malfunction
	incorrect throttle position sensor (TPS) reading
	low signal from throttle position sensor (TPS)
	high signal from throttle position sensor (TPS)
	low coolant temperature
	Faulty electrical circuit or oxygen sensor
	slow signal from oxygen sensor
	oxygen sensor heater circuit malfunction
	downstream oxygen sensor electrical circuit malfunction
	slow signal from downstream oxygen sensor
	downstream oxygen sensor heater circuit malfunction
	non-optimal fuel mixture ratio
	incorrect temperature sensor reading
	low signal from temperature sensor
	high signal from temperature sensor
	faulty fuel injector 1
	faulty fuel injector 2
	faulty fuel injector 3
	faulty fuel injector 4
	low signal in the fuel injector circuit 1
	high signal in the fuel injector circuit 1
	fuel injector 2 circuit low
	fuel injector 2 circuit high signal
	fuel injector 3 circuit low
	fuel injector circuit 3 high signal
	fuel injector 4 circuit low
	fuel injector circuit 4 high signal
	Cylinder #1 Misfire Detected
	Cylinder #2 Misfire Detected
	Cylinder #4 Misfire Detected
	knock sensor electrical circuit malfunction
	crankshaft angle sensor electrical circuit malfunction
	distorted crankshaft angle sensor signal
	Faulty camshaft position sensor circuit
	distorted camshaft position sensor signal
	exhaust gas re-burning (EGR) system malfunction
	malfunction of the electrical circuit of the exhaust gas reburning system (EGR)
	low catalyst efficiency
	malfunction in the evaporative emission (EVAP) system
	malfunction in the EVAP cleaning system
	malfunction of the electrical circuit or the control valve for cleaning the EVAP system
	EVAP valve malfunction
	wrong pressure sensor signal fuel tank EVAP systems
	EVAP fuel tank pressure sensor low signal
	EVAP fuel tank pressure sensor high signal
	incorrect fuel level sensor signal
	low signal in the fuel level sensor circuit
	high signal in the fuel level sensor circuit
	electrical circuit or VSS malfunction
	malfunction in the air control valve (IAC) system
	too low idle speed
	too much high revs idle move
	communication line failure
	control unit internal memory error
	brake light switch malfunction
	malfunction of the electrical circuit or sensor of the engaged gear
	malfunction of the electrical circuit or the oil temperature sensor in the gearbox
	VSS system electrical circuit malfunction
	malfunction in the electrical circuit of engine speed
	wrong gear ratio
	torque converter malfunction
	solenoid valve malfunction

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HYUNDAI ACCENT automatic transmission diagnostics, HYUNDAI ACCENT automatic transmission performance check in Moscow

Diagnosis of automatic transmission HYUNDAI ACCENT - a set of measures aimed at identifying all kinds of defects in the functioning automatic box gears. In specialized car services will help to identify all faults.

Car service masters can not only localize faults, but also tell you whether it is often worth carrying out diagnostic work with automatic HYUNDAI transmission ACCENT.

HYUNDAI ACCENT test sequence

The sequence during the verification activities of the HYUNDAI ACCENT automatic transmission is almost always similar. It includes

None of these stages should take place uncontrollably, without the use of technical documentation. The specialist must know exactly how to evaluate the performance of the HYUNDAI ACCENT automatic transmission.

It is almost impossible to diagnose a HYUNDAI ACCENT automatic transmission with your own hands using videos, photos and troubleshooting instructions. That is why experts advise contacting technical centers at the first sign of a malfunction of this vehicle unit. Even if there are instructions, how automatic transmissions are evaluated HYUNDAI gear ACCENT, it is very difficult to carry out such activities on your own. Experts advise not to try to do this and contact an authorized technical center.

Car service check

There are many services in Moscow where they will offer to check malfunctions in the automatic transmission, you can choose the one that suits you in our catalog.

Specialized equipment will allow you to diagnose defects in an automatic transmission quickly and inexpensively.

Repair automatic boxes in the AutoHelp car service is a common thing, so do not doubt the level of professionalism of the team.

We guarantee reasonable prices and pleasant service.

Also, our customers can be pleased with a comfortable recreation area, equipped with everything necessary.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Kuntsevo; Fili-Davydkovo;

Metro: Pionerskaya; Kuntsevskaya; Youth;

Streets, highways: Rublevskoe highway; st. Zhytomyr; st. Kastanaevskaya; Aminevskoe highway;

District: Western Administrative District;

We work using only the most modern tools and equipment, so we meet a fairly short time.

Be one hundred percent sure that only the most highly qualified employees will serve you.

And if you still don't want to visit the Top Transmission technical center, then think about a wonderful rest room, which will not only allow you to have a good time during car repair, but also relax with free internet.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Troparevo-Nikulino; Ochakovo-Matveevskoe;

Metro: Yugo-Zapadnaya; Vernadsky avenue; Troparevo;

Streets, highway: Vostryakovskoe highway; Ochakovskoe highway; st. Ruzskaya; st. Pokryshkina; Aminevskoe highway;

District: Western Administrative District; Southwestern Administrative District;

Distinctive feature our workshop - short terms and reasonable prices.

Masters will provide diagnostic services and subsequent repairs using new or used components.

A pleasant addition to the service for you will be the opportunity to enjoy hot drinks while your vehicle is being restored.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Areas: Teply Stan; Konkovo;

Metro: Konkovo; Belyaevo; Teply Stan;

Streets, highways: st. Ostrovityanova; Profsoyuznaya street; st. Academician Kapitsa; Warsaw highway;

District: Southwestern Administrative District;

The masters of our workshop will manage short time and will not require too much investment.

The salon is distinguished by a well-trained and well-coordinated team of auto mechanics.

In addition, in the recreation area you pass the time with free Internet access.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Shchukino; Pokrovskoe-Streshnevo;

Metro: Tushinskaya; Spartacus; Schukinskaya;

Streets, highways: Volokolamsk highway; st. Vodnikov; Strogino highway;

District: Northwestern Administrative District;

Thanks to the professionalism and speed of our auto mechanics, gearbox repair is the most popular service in the auto technical center.

We use only modern equipment, which simplifies the diagnostic and repair work.

While we are repairing your car, enjoy great drinks and free internet.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Voikovsky; Falcon; Yuzhnoportovy;

Metro: Voykovskaya; Volgograd Prospect; Falcon;

Streets, highways: st. Novoostapovskaya; Leningrad highway; st. Usievich; per. Station; per. 2nd Novopodmoskovny; Volgograd Prospect; st. Aseeva; 1st Dubrovsky pr-d;

District: Southeastern Administrative District; Northern Administrative District;

Repair of automatic transmissions in a car service is always carried out on time and at an affordable price, which will not hit your pocket hard.

In our salon, the work of the masters is organized on the very high level and meets all the requirements for such processes.

Do not forget about the opportunity to treat yourself to pleasant drinks while waiting.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Sokol; Voikovsky;

Metro: Voykovskaya; Falcon; Water stadium;

Streets, highway: per. Station; Leningrad highway; st. Aseeva; per. 2nd Novopodmoskovny; st. Usievich;

District: Northern Administrative District;

We do not doubt the quality of services, therefore we maintain reasonable prices for our customers and give guarantees.

We will carry out the work in a short time, thanks to the high professionalism of the employees.

We provide free Internet access, which can be used in the lounge.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Timiryazevsky; Butyrsky; Savelovsky;

Metro: Dmitrovskaya; Timiryazevskaya; Savelovskaya;

Streets, highways: st. Vyatskaya; st. 1st Khutorskaya; Dmitrov highway;

If you experience problems when traveling by car, then repair automatic transmission in our workshop can be a real panacea.

Qualified employees will not only point to the source of problems, but also help to eliminate it.

A guarantee that applies to all types of work, and drinks in the lounge will be great additions to visiting this salon.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Begovoy; Meshchansky; Marina Grove;

Metro: Dostoevskaya; Mendeleevskaya; Marina Grove;

Streets, highways: Prospekt Mira; 1st avenue of Maryina Grove; st. October; Dmitrov highway;

District: Northeastern Administrative District; Central Administrative District;

The auto repair shop is popular for prompt and acceptable price.

You can always follow the work of specialists, and they will advise on the operation of an automatic transmission after repair.

There is a lounge with hot drinks and free Wi-Fi.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Babushkinsky; Rostokino;

Metro: Sviblovo; Botanical Garden; Babushkinskaya;

Streets, highway: 1st st. Leonov; Yaroslavl highway; 2nd pr-d Leonov; st. Amundsen; st. Sibiryakovskaya;

District: Northeastern Administrative District;

We use only the best and newest equipment.

Our employees have learned and thoroughly know the automatic transmission device, so you can be sure of the quality of work. The cost does not exceed the average rates in Moscow.

Relax while we repair.

Working hours: Mon-Sun

Opening hours: 9:00-21:00

Districts: Otradnoe; Bibirevo;

Metro: Altufyevo; Otradnoe; Bibirevo;

Streets, highways: st. Konenkov; st. Prishvin; Altufevskoe highway;

District: Northeastern Administrative District; Northern Administrative District;

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Symptoms

Whatever the malfunction in the HYUNDAI ACCENT automatic transmission, each of them has its own specific symptoms. And some you can see with your own eyes.

It is worth considering making an appointment with a service center if you notice the following problems in the operation of an automatic transmission

• harsh jolts or jerks when shifting gears
• liquid leakage
• delays in automatic transmission response
• any extraneous noise during work

Such things cannot be ignored. Otherwise, all this can result in a full automatic transmission repair.

Each stage of the audit must be carried out in accordance with strict regulations. Specialists who know the technical regulations for such events will be able to identify all possible faults.

Computer diagnostics of automatic transmission

Computer scanning of the control unit is carried out using special equipment. Do-it-yourself code verification is not possible.

Error codes that are detected in the process of such diagnostics will be subsequently deciphered by specialists. Deciphering the results obtained is an occupation for those who know well technical documentation and features various models and stamps.

Instrumental check

With the help of instrumental diagnostics, the masters will always be able to detect problems that arise during the operation of an automatic transmission.

The use of specialized equipment is the key to the most complete assessment, which will show all the defects.

Oil check

Checking the automatic transmission oil - its quality and level - is an integral step in any diagnosis of the HYUNDAI ACCENT automatic transmission.

If there are problems with oil in the box, then they will always be visible by certain signs. You should be aware of things like

• bad smell
• the presence of flakes in the oil
• metal shavings
• turbidity of the special fluid

If any of these signs appear, you should immediately contact a car dealership so that experienced specialists check the oil level in the HYUNDAI ACCENT automatic gearbox.

Service cost

The cost of work may vary in terms of different services. Find out how much it costs to check automatic transmission, you can have the masters.

Sign up for a technical center

An appointment for a HYUNDAI ACCENT automatic transmission check at various technical centers in Moscow is carried out by calling a multi-channel call center.

car models
Model	Engine		years	System
Accent 1.3i SOHC	—		1995-1997	Hyundai MR
Accent 1.5i SOHC	—		1995-1997	Hyundai MPi
Coupé 1.6DOHC16V	G4GR		1996-1997	Hyundai MPi
Coupé 1.8OOHC16V	G4GM		1996-1997	Hyundai MPi
Coupé 2.0 DOHC 16V	G4GF		1996-1997	Hyundai MPi
Lantra 1,5i SOHC cat	4G15/G4J		1993-1995	Hyundai MPi
Lantra 1,6i OOHC cat	4G61		1991-1995	Hyundai MPi
Lantra 1.6 DOHC 16V	G4GR		1996-1997	Hyundai MPi
Lantra 1,8i DOHC cat	4G67		1992-1995	Hyundai MPi
Lantra 1.8 DOHC 16V	G4GM		1996-1997	Hyundai MR
Pony X21.5S SOHC cat	4G15/G4J		1990-1994	Hyundai MPi
S Coupe 1.5i SOHC cat	4G15/G4J		1990-1992	Hyundai MR
S Coupé 1.5i SOHC	Alpha		1992-1996	Bosch Motronic М2.10.1
S Coupe 1,5i turbo SOHC	Alpha		1992-1996	Bosch Motronic M2.7
Sonata 1.8 SOHC	4G62		1989-1992	Hyundai MPi
Sonata 2.0 SOHC	4G63		1989-1992	Hyundai MPi
Sonata 2.016V DOHC	—		1992-1997	Hyundai MPi
Sonata 2.4 SOHC	4G64		1989-1992	Hyundai MPi
Sonata 30 SOHC	V6		1994-1997	Hyundai MR

The engine management system (CUD!) has a self-diagnostic function that continuously analyzes the signals of sensors and actuators of the engine and compares them with reference values. If the diagnostic program detects any discrepancy, one or more corresponding fault codes are recorded in the memory of the electronic control unit [BCU] Codes will not appear in cases where the faulty element is not under the control of the SUD and the failure situation is not provided for by its software.

The Hyundai MPi system generates 2-digit fault codes that can be retrieved either manually or with a reader. In Bosch Motronic M2.7 and M2.10.1 systems, 4-digit codes are generated for manual extraction, and 2- or 3-digit codes for the reader. The meanings of the codes are given at the end of the chapter.
Limited control strategy

The Hyundai systems described in this chapter have a limp home mode [a feature known as 'limp home' or 'limp home']. This means that in the event of some malfunctions (not all malfunctions cause this mode to be activated), the engine control system begins to be guided not by the sensor readings, but by its reference value. This mode allows the car to get to the garage or service station for inspection and repair, albeit with less efficiency. Once the fault has been corrected, the system returns to normal operation.

adaptive function

Hyundai systems are adaptable, whereby the programmed values ​​for certain sensors and actuators change during operation, taking into account engine wear, to achieve maximum efficiency.

Fault light

Most Hyundai models are equipped with a warning light
located on the instrument panel. If the light does not go out or lights up at some point while the engine is running, then the diagnostic system has detected a malfunction. The warning light on some vehicles can also be used to retrieve trouble codes.

Location of the diagnostic connector

All Hyundai models

The diagnostic connector is located in the fuse box on the driver's side or under the dash [see illustration]. rice. 14.1,14.2). The diagnostic connector allows you to retrieve codes both manually (flashing light) and using a reader.

Extracting codes

without the aid of a reader (“flashing” codes)

Note: During the performance of some checks, additional fault codes may occur. Be very careful when performing checks so that these codes do not mislead you. After testing, all fault codes must be erased.

Hyundai MPi signal light bases (voltmeter method)

1. Connect an analog voltmeter to sockets A and B of the diagnostic socket (see Fig. 14.2).
2. Turn on the ignition.
3. If there are fault codes in the BEU memory, the voltmeter needle will begin to oscillate between the upper and lower levels. Arrow deviations should be interpreted as follows.
4. The first series of oscillations displays tens, the second series - ones.
5. When displaying tens, the arrow deviates for a longer period than when displaying units. If the system has not registered any malfunctions, the arrow will oscillate uniformly.
6. Count the number of arrow deflections in each series and write down the codes in the order in which they appear. To decipher the meaning of the codes, refer to the table at the end of the chapter.
7. To complete the reading of the codes, turn off the ignition and disconnect the voltmeter.

Hyundai MPi signal light bases (LED method)

1. Connect the LED to sockets A and B of the diagnostic connector (see Fig. 14.3).
2. Turn on the ignition.
3. After about 3 seconds, the LED will flash codes as follows.
4. Two digits of the code are displayed by two series of flashes.
5. The first series of flashes depicts tens, the second series represents ones.
6. Tens are displayed with 1.5-second flashes at 0.5-second intervals, and units with 0.5-second flashes at 0.5-second intervals.
7. Codes are separated from one another by pauses of 2 seconds.
8. Code ‘42’ is displayed with four 1.5 second flashes, a 2 second pause and two 0.5 second flashes.

Count the number of flashes in each series and write down the codes in the order in which they appear. To decipher the meaning of the codes, refer to the table at the end of the chapter.

• The codes will appear in sequence and repeat after a 3-second pause.
• The appearance of eight uniform 0.5-second pulses, which will repeat after 3 seconds, means that the system has not detected any malfunctions.
• To complete the reading procedure, turn off the ignition and turn off the LED. Hyundai MPi with warning light
  1. Turn on the ignition.
  2. Short jumper sockets A and B of the diagnostic connector (see Fig. 14.4).
  3. After about 3 seconds, the signal light will start flashing the codes in the same way as the LED (see points 8-11 above).
  4. To complete the reading procedure, turn off the ignition and remove the jumper.

Bosch Motronic M2.7 and 2.10.1

Note. The 4-digit codes obtained with the flashing light may differ from those obtained with the reader. Be careful when using the table at the end of the chapter - use the "flashing code" column.

Deleting codes from memory without the help of a reader

Bosch Motronic 2. Yu. 1 and M2.7

1. Retrieve the codes by the method described above until the code ‘3333’ appears.
2. Short for 1 □ seconds of diagnostic connector A and B, the codes will be cleared.

Self-diagnosis using a code reader

Note: Some checks may generate additional fault codes. Be

be very careful when carrying out checks so that these codes do not mislead you.

For all Hyundai models

1. Connect the reader to the diagnostic socket [see rice. 14.6). Use the reader for the following circuits, following the manufacturer's instructions:
2. Reading fault codes.
3. Erasing fault codes.
4. The reader is capable of reproducing both 4-digit flash codes and 2- or 3-digit reader-only codes. Be careful when deciphering the codes - use the correct column of the table.
5. Codes must be cleared after checking the components and after repairing or replacing any component of the engine management system.

Check order

• Using a signal light (where possible) or using a reader, retrieve fault codes from the ECU memory

There are fault codes in the memory of the control unit

• If one or more fault codes are stored in the memory of the control unit, determine their meanings according to the table at the end of this chapter.
• If several fault codes occur at once, check the components common to them, primarily the ground and power circuits.
• Perform tests as recommended in Chapter 4, which covers tests for most engine control systems.
• After eliminating the malfunction, erase its code from memory, start the engine and make sure that the malfunction does not occur again in all engine operating modes.
• Check the codes again. If the codes reappear, repeat all the above procedures.

Hyundai MPi

1. Turn off the ignition and disconnect the negative cable from the battery for about 15 seconds.
2. Reconnect the battery. Comment. The first disadvantage of this method is that the BEU will reset all adapted parameter values ​​to their original state. In order to adapt the system to your engine again, you will need to start the engine from a low state, and then drive the car at different engine speeds for 20 ... 30 minutes. In addition, let the engine idle for about 10 minutes. The second disadvantage is that you will have to re-set the radio's security code, the current time value and other stored values, which will also be reset when the battery is disconnected. If possible, it is best to use a reader to clear the codes.

There are no fault codes in the memory of the control unit

• If there is doubt about the health of the engine, and there are no fault codes in the memory of the control unit, the reason is probably that the fault is in an area not controlled by the engine management system.

Fault code table

The first series of oscillations displays tens, the second series - units. The ASR lamp generates a fault code each time this button is pressed. After a pause at 2.

In such a situation, contact an authorized dealer as soon as possible. HYUNDAI for check…

Codes are separated from one another by pauses of 2 seconds. Count the number of arrow deflections in each series and write down the codes in the order in which they appear.

To decipher the meaning of the codes, refer to the table at the end of the chapter. Make sure that the scanner is installed correctly in place of the diagnostic block.

All systems control the ignition system's primary target, fuel injectors, and idle system from a single module. Self-diagnostic function Engine management system SUD! If the diagnostic program detects any discrepancy, one or more corresponding fault codes are stored in the memory of the electronic control unit [LCU].

Codes will not appear in cases where the defective element is not under the control of the SUD, when the failure situation is not provided for by its software.

In Bosch Motronic M2 systems. The meanings of the codes are given at the end of the chapter. This means that in the event of some malfunctions [not all malfunctions cause this mode to be activated, the engine control system begins to be guided not by the sensor readings, but by its reference value.

This mode allows the car to get to the garage or service station for inspection and repair, albeit with less efficiency.

Once the fault has been corrected, the system returns to normal operation.

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Fault warning light Most Hyundai models are equipped with a warning light located on the instrument panel. If the light does not go out or lights up at some point while the engine is running, then the diagnostic system has detected a malfunction. The warning light on some vehicles can also be used to retrieve trouble codes.

Solaris Machine Self Diagnosis with viecar adapter

Location of the diagnostic connector All Hyundai models The diagnostic connector is located in the fuse box on the driver's side or under the dash [see The diagnostic connector allows you to extract codes both manually by a flashing light, and using a reader.

During the performance of some checks, additional fault codes may occur. After testing, all fault codes must be erased. Hyundai MPi signal light bases method with voltmeter Connect an analog voltmeter to sockets A and B of the diagnostic connector.

If there are fault codes in the BEU memory, the voltmeter needle will begin to oscillate between the upper and lower levels.

Guides

Arrow deviations should be interpreted as follows. The first series of oscillations displays tens, the second series - units.

When displaying tens, the arrow deviates for a longer period than when displaying units. If the system has not registered any malfunctions, the arrow will oscillate uniformly. Count the number of arrow deflections in each series and write down the codes in the order in which they appear. Detection of a supply voltage failure indicates the presence of a malfunction between this point in the circuit and the last one previously checked where the supply voltage was.

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In most cases, the reason for failure is the weakening contact connectors and damage to the contacts themselves - oxidation. Search for a short circuit. One method for finding a short circuit is to remove the fuse and connect a probe lamp or voltmeter instead. There should be no voltage in the circuit.

Pull the wiring while watching the probe lamp. A similar test can be carried out for each of the components of the electrical circuit by turning on the appropriate switches. Connect the other lamp wire to the wire harness or connector pin you are testing.

After disconnecting power to the circuit, test it with a self-powered test lamp. Connect the probe leads to both ends of the circuit. The standard window for checking and resetting errors in the Scan Master program The process of diagnosing and resetting errors without OBD-II On Hyundai Solaris, you can diagnose and remove errors, even without any additional devices at hand.

Diagnosis this method does not work The method described below runs all over the Internet.

We tested on our drafting machine. We do not delete the method, as some owners may think that it works. We turn on the ignition, but do not start the engine - we count 3 seconds.

We press the gas pedal as written in the algorithm. We wait 7 seconds, and again until the end we press the pedal 1 time. After that, the indicator on the instrument panel should flash.

We release the pedal and look at the instrument panel and the trouble code. To exit the menu, turn off the ignition.