Error codes for KamAZ Euro-4 are information about malfunctions vehicle.

How to diagnose

Diagnostics includes collecting signs of problems in the system, scanning the electronic control system, resetting and checking all mechanisms and systems for malfunctions in the electronic unit, examining all sensors that are responsible for the smooth operation of the power unit.

During the diagnostics of KamAZ-5490, 54115, 5308 and other models with an engine manufactured according to the international environmental standard Euro-3 and 4, the pressure level in fuel system, testing performance generator set and analyze exhaust gases using special equipment. They also check the winding of the electromagnetic regulator of the fuel supply system and the short circuit in the coils of inductive sensors.

Equipment and software for diagnostics

There are several scanners to detect problems in vehicle mechanisms, for example:

1. Autoscanner DK-5. This equipment helps to detect operational problems electronic block by reading and adjusting the indicators of the control system using a computer. This autoscanner can be used at temperatures up to +30°С and relative air humidity not more than 80%.
2. Scanner EDS-24. This is a hardware and software system designed for computer diagnostics cargo vehicle. It includes a USB adapter with galvanic type isolation, which makes it possible to test systems in low voltage conditions.

Programs for diagnostics:

• Euroscan;
• Scanmatic-2;
• AUTOAS-CARGO.

Decryption of errors

The decoding of KamAZ error codes is presented in the instructions for the program that is used for diagnostics. Error examples:

• 213 - violation in the operation of the power unit control device;
• 296 - the pressure of the oil fluid has dropped;
• 2973 - failures in the air pressure control system during intake manifold;
• 214 - overheating of the oily liquid;
• 235 - insufficient amount of coolant in the system;
• 425 - high oil temperature;
• 3617 - no multi-stage switch signal;
• error 4335 - problems with the air supply;
• 275 - the injection pump does not work correctly;
• 429 - high voltage in the fuel indicator circuit;
• 351 - a violation in the operation of the nozzles;
• 415 - low level of working fluid;
• 261 - fuel overheating.

See » All about the repair and installation of a brake valve for KamAZ

Sensor failures

Fault codes for KamAZ-34334, 6308 sensors and other models with a Euro-4 engine:

• 221 - a breakdown in the pedal position sensor, which is responsible for the supply of working fluid;
• 232 - malfunction of the sensor that measures atmospheric pressure;
• 335 - defects in the wiring of the lamp control output stage;
• 231 - malfunction of the boost pressure sensor on electric block management;
• 124 - fixing an incorrect voltage indicator;
• 345 — incorrect work signal transmission from the exhaust gas pressure indicator;
• 113 - problems with the camshaft speed;
• 112 - incorrect indicators coming to the control unit from the crankshaft;
• 246 - malfunctions of the temperature sensor;
• 00550 - malfunction of the injection pump plug.

ICE malfunctions

List of engine breakdowns on KamAZ:

• 726 FMI 2 - malfunctions in the position indicator of the device responsible for the distribution of liquid;
• SPN 526313 FMI 6 - defective device that controls the pressure level in the ramp mechanism;
• SPN 520211 FMI 12 - no message from the ABS system;
• SPN 791 FMI 4 - low charge;
• 523470-2 - there is no voltage in the circuit of the mechanism responsible for resetting pressure indicators;
• SPN 523613 FMI 16 - filters for cleaning the working fluid are worn out;
• 77 FMI 0 - high engine speed;
• 190-3 - malfunction;
• 110-0 - high motor temperature level;
• 132-4 - failure in the distribution of air flow;
• 653-0 - damage to the injector power system.

Other breakdowns

Code table:

Error codes in the system	Cause of failure
SPN 977 FMI 4	Malfunctions in the chain mechanism of the air conditioner
98-1	Number of revolutions exceeded crankshaft
523601-4	Low fuel and oil level
3514-31	The power supply has failed
675-4	Injectors closed
13688-4	Relay fuel pump closed to the ground
91-4	Fuzzy signal from the sensor responsible for the position of the brake mechanism
171-3	This error stands for a malfunction of the thermometer.
1072-4	The valve was shorted to ground
111-3	Strong signal from antifreeze level indicator
1188-5	No communication with airflow heating relay
110-2	The sensor that monitors the temperature of antifreeze does not work correctly
1188-4	A short to ground has occurred in the pressure valve control circuit

ENGINE MANAGEMENT SYSTEMS

The engines use fuel management systems with mechanical or electronic regulators (see table 1).

Used in Euro-2 engines, mechanical regulators of in-line injection pumps from BOSCH are built into the pump, their controls are shown in Figure 39.

ELECTRONIC CONTROL SYSTEM

KAMAZ engines of Euro-3 level are equipped with electronic engine control systems (ECM), where instead of traditional injection pumps with a mechanical regulator, the following are used:

BOSCH injection pump type 7100 with electronic regulator;

High pressure fuel pump of JSC "YAZDA" type 337-23 with an electronic regulator.

The ECM is designed to control the cyclic supply of engine fuel depending on the engine operating modes, its temperature state, control characteristics and environmental parameters. The system provides the following functions:

Rationing of starting fuel supply;

Correction of cyclic supply depending on the charge air pressure;

Restriction of cyclic fuel supply when the limiting temperature of the coolant is reached;

Starter blocking relay control;

Shutting off the fuel supply in the "mountain brake" mode;

Cruise control function;

Limitation top speed car;

Providing an emergency stop of the engine;

Implementation of diagnostic functions and transmission diagnostic information through the diagnostic connector via the K-line and CAN lines;

Indication of a malfunction of the ECM by the control lamp " check engine»;

Ensuring interaction with other vehicle control systems;

Providing emergency warning and protection, etc.

A complete list of functions performed by the ECM is determined during the design of the product on which the engine is used.

The structure of the ESUD includes:

Electronic control unit (ECU);

Wiring harnesses complete with sensors, switches and connectors for connecting devices for diagnosing the system in operating conditions;

Actuators (high pressure fuel pump rack drive, engine emergency shutdown valve).

ECM elements and their purpose on KAMAZ engines with R7100 injection pump.

The placement of the system elements and the laying of the motor wiring harness are shown in Figure 44.

The system uses the following elements:

Crankshaft speed sensors (main and auxiliary)0 281 002 898 Bosch inductive, used to measure the rotational speed of crankshaft and camshaft engine. The crankshaft speed sensor is installed in the hole made in the front cover. To form the sensor signals, a special front crankshaft counterweight with eight grooves is used as an inductor.

Speed ​​sensor camshaft installed in a special hole made in the flywheel housing. To form the sensor signals, a special wheel with sixteen grooves is used as an inductor.

0 281 002 209 f. "Bosch" is used to determine the temperature state of the engine. It is installed in the hole in the thermostat box of the engine cooling system. The sensor signal is used in the function of limiting the cyclic supply when the permissible engine temperature is exceeded with a warning to the diagnostic lamp and correction of the starting fuel supply depending on the temperature state of the engine.

Fuel temperature sensor0 281 002 209 f. "Bosch" is used to determine the temperature of the fuel, mounted in a special valve body installed at the inlet to the injection pump. Depending on its signal, the volume of cyclic fuel supply is adjusted.

Charge air pressure and temperature sensor0 281 002 576 F. "Bosch", installed in the connecting pipe, determines the temperature and air pressure in the intake manifolds of the engine. Air temperature and pressure values ​​are needed to determine mass flow air.

Electronic control unitMS6.1 f. "Bosch" provides reception and processing of signals from sensors and switches, transmitted information via the CAN bus. The ECU analyzes all incoming information about the operating parameters, the state of the engine and the car, processes it in accordance with the specified algorithms and controls the injection pump rail, while ensuring the injection of strictly metered portions of fuel. Across CAN bus it is possible to exchange signals with other vehicle systems, through the K-line system diagnostics are carried out.

The electronic control unit is installed in the cab of the vehicle.

The actuating mechanisms of the system are the injection pump rail displacement electromagnet and the 24V retracting electromagnet of the engine emergency shutdown valve.

High pressure fuel pump rail solenoidwith a position sensor are used to set the injection pump rail to the position corresponding to the specified engine operation mode. The design and characteristics of the electromagnet provide high accuracy and speed, providing regulation of the motor depending on the working conditions.

Retractor electromagnet24V engine emergency stop valve is used to stop the fuel supply to the injection pump in case of emergency (for example, jamming of the injection pump rail, excessive crankshaft speed, etc.). It is installed in a special valve body together with a fuel temperature sensor.

Fuel pedalf. "TeleAexMorse" is installed in the cab of the product and serves to select the required mode of operation of the engine by the driver. The output voltage signal is transmitted to the electronic control unit, where it is converted into a fuel cycling value.

Diagnostic indicator lampengine (“Check Engine” lamp) installed on the instrument panel in the cab of the car, serves to control the operation of the engine and issue fault codes - blink codes.

After the ignition is turned on, the engine diagnostic lamp is tested, during which it lights up for three seconds. If the diagnostic lamp stays on or lights up when the engine is running, this means that a malfunction has occurred in the ECM and it is necessary to contact the service center. Fault information is stored in the ECU and can be read either with a diagnostic tool or with a diagnostic lamp. After the fault has been eliminated, the diagnostic lamp goes out.

Rice. 44 - Installing the wiring harness:

1 - crankshaft speed sensor (main), 2 - camshaft speed sensor (auxiliary), 3 - coolant temperature sensor, 4 - fuel temperature sensor, 5 - charge air pressure and temperature sensor, 6 - engine management system harness , 7 - solenoid of the injection pump rail, 8 - retracting solenoid 24V of the emergency stop valve

Engine diagnostics.

The diagnostic mode switch installed in the product cabin has three positions - middle (fixed), top and bottom (non-fixed). In the up and down positions, the ECM is in diagnostic mode.

Engine diagnostics is carried out by pressing and holding the switch in the upper or lower pressed position for more than 2 seconds. After releasing the switch, the diagnostic lamp flashes the blink code of the engine malfunction in the form of several long flashes (the first character of the blink code) and several short flashes (the second character of the blink code).

The next time you press the switch, the lamp will blink the blink code of the next malfunction. Thus, all faults stored in the electronic unit are output. After the last stored fault is output, the unit starts to output the first fault again.

To erase the fault blink codes output by the diagnostic lamp from the memory of the control unit, while the diagnostic mode switch is pressed, turn on the ignition and then hold the diagnostic mode switch for about 5 seconds.

Example- in case of a physical error in the charge air temperature sensor (blink code 32), the diagnostic lamp flashes 3 long flashes, a pause, 2 short flashes.

The list of possible errors and malfunctions, their pancake codes and recommended actions is given in Table 4

Table 4 - Possible malfunctions, their codes and solutions

Error Description	Blink code		How to fix the error
Accelerator pedal malfunction		n max \u003d 1900 min -1	Check the connection of the gas pedal. Contact service center
Atmospheric pressure sensor malfunction		N max \u003d 300 hp
Physical error of the barometric pressure sensor
Clutch Sensor Malfunction		nmax=1900min -1	Check clutch sensor. You can keep moving. Do not use the cruise control function. Contact the service center.
Malfunction of the main engine speed sensor (crankshaft)		nmax=1600min -1	Check the condition and connection of the relevant engine speed sensors

Table 4 continued

Error Description	Blink code	ECM limits	How to fix the error.
Incorrect polarity or reversal of speed sensors		nmax=1800min -1 nmax=1900min -1	You can keep moving. Contact service center
Malfunction of the auxiliary engine speed sensor (camshaft)	18	nmax=1800min -1
Main relay failure	19	No	Check the main relay and its connection. You can keep moving. Contact the service center.
Faulty injection pump	21,22,24-26	The engine may not start	Check the contact of the injection pump plug. Urgently contact the service center!
Error Description	Blink code	ECM limits	How to fix the error
Mismatch between the position of the gas pedal and the brake pedal	23	N max \u003d 200 hp	Check the gas pedal, it may be jammed,
Poor rail position sensor contact	27		Check the contact of the injection pump plug. Urgently contact the service center
Brake Pedal Sensor Malfunction	28	N max \u003d 200 hp	Check brake pedal sensor and brake relay. You can keep moving. Contact service center
Malfunction of the electronic control unit (hardware)	29,51-53,81-86,99	The engine may not start.	Urgently contact the service center
Charge air temperature sensor malfunction	31	N max \u003d 300 hp	Check the charge air temperature sensor. You can keep moving. Contact service center
Charge air temperature sensor physical error	32
Charge air pressure sensor malfunction	33	N max \u003d 250 hp	Check the charge air pressure sensor.You can keep moving. Contact service center
Charge air pressure sensor physical error	34
Cruise Control Module Malfunction	35	No	Check the connection of the cruise control lever. You can keep moving. Contact the service center. This error also appears due to the simultaneous pressing of several control elements of the cruise control lever.

Table 4 continued

Error Description	Blink code	ECM Limits	How to fix the error
Coolant Temperature Sensor Malfunction		N max \u003d 300 hp nmax=1900min -1	Check coolant temperature sensor. You can keep moving. Contact service center
Physical error of the coolant temperature sensor
Fuel Temperature Sensor Malfunction		nmax=1900min -1	Check fuel temperature sensor.You can keep moving. Contact service center
Physical fuel temperature sensor error
Error Description	Blink code	ECM limits	How to fix the error
Wrong signal from multi-stage input		No	You can keep moving. Contact the service center.
Vehicle speed signal error		nmax=1550min -1	Check the connection of the tachograph to the electronic control unit. You can keep moving. Contact service center
Excess on-board voltage		No	Check battery charge.
Exceeding the maximum allowable engine speed		After a complete stop of the engine, a new start is possible	If the excess was due to incorrect gear shifting from higher to lower: check the engine body; If the engine is in order, you can start the engine and continue driving. If the engine spontaneously increased the speed, do not start the engine.Urgently contact the service center
Incorrectly completed work cycle of the electronic control unit		No	This error appears due to the mass being turned off earlier than 5 s after the ignition is turned off or the power supply to the electronic control unit is interrupted. You can keep moving. Contact service center
CAN line fault	61-76	No	Check CAN line connection to other CAN devices (ABS, automatic transmission, etc.). You can keep moving. Contact service center

Elements of the ECM for KAMAZ engines with a V-shaped injection pump.

Sensors installed on the engine:

Two crankshaft speed sensors;

Coolant temperatures;

Fuel temperatures;

Charge air temperature;

Charge air pressure.

crankshaft speed sensor406.3847060-01 (JSC "Pegas") - induction, used to measure the speed of the engine crankshaft. It is installed in special holes in the flywheel housing. The flywheel rim teeth are used as an inductor to generate crankshaft speed signals. To ensure engine performance in the event of failure of one of the sensors, two speed sensors are used.

coolant temperature sensor192.3828 (JSC Avtoelectronics, Kaluga) is used and installed similarly to the ECM with the Bosch in-line pump.

Fuel temperature sensor192.3828 (JSC "Avtoelectronics", Kaluga) installed in the fuel channel of the injection pump, used to determine the temperature of the fuel. Depending on its signal, the volume of cyclic fuel supply is adjusted.

charge air temperature sensor192.3828 (JSC Avtoelectronics, Kaluga), installed in the connecting pipe, determines the air temperature in the engine intake manifolds.

charge air pressure sensor23.3855 (JSC Avtoelectronics, Kaluga) is mounted with a bracket on the connecting pipe of the engine air manifolds and connected to the intake manifold with a rubber sleeve.

The air temperature and pressure values ​​are necessary to determine the mass air flow and, accordingly, the composition of the working mixture.

Electronic control unit50.3763 ​​(JSC ChNPPP "Elara", Cheboksary) is installed in the cab of the car.

The ECU analyzes all incoming information about the operating parameters, about the state of the engine and the car, processes it in accordance with the specified algorithms and controls the injection pump rail, while ensuring the injection of strictly metered portions of fuel. Through the CAN bus, it is possible to exchange signals with other vehicle systems, through the K-line, system diagnostics are carried out.

Electromagnet rotary movement of injection pump rails(LLC "Association Rodina", Yoshkar-Ola) 18 (Figure 38) with position sensor 17 are used to install the injection pump rails in the position corresponding to the specified engine operation mode. The actuator is bolted to the top cover of the injection pump from the side of the oil cavity. An actuator position sensor is installed on the outer side of the cover. The upper cover of the injection pump is bolted to the pump housing through the gasket and ensures the tightness of the oil cavity of the pump. The design and characteristics of the electromagnet determine high accuracy and speed, providing regulation diesel engine depending on working conditions.

cut-off fuel valve, designed to stop the engine by cutting off the fuel supply to the injection pump in the event of emergency situations(for example, exceeding the crankshaft speed), is installed in the fuel system at the inlet to the injection pump.

Pedal moduleKDBA 453621.003 (CJSC Avtokomplekt, Arzamas) is required to select the required engine operation mode by the driver. The output voltage signal is transmitted to the electronic control unit, where it is converted into the required value of the cyclic fuel supply.

The placement of the elements of the system and the laying of the motor bundle of wires on the engine are shown in Figure 45.

Engine Diagnostic Warning Lamp(“Check Engine” lamp), as in other systems, serves to monitor engine operation and issue fault codes - blink codes.

Diagnostics and error management of the ECM system.

System diagnostics is performed using a scanner-tester or a personal computer. In this case, OBD II error codes are generated, presented in Table 5.

Diagnosis of some errors can be carried out even in the absence of a scanner-tester, for which it is necessary to briefly press the "Diagnostics / Reset errors" button on the product control panel once. If there are errors in the system, then the first error code will be displayed with a light (Check Engine light). To determine the next error code, after the end of the display, current error press the "Diagnostics / Reset errors" button on the control panel again, etc.

Each code consists of eight consecutive flashes of different durations of the light bulb. A short flash (about 0.2 seconds) corresponds to "0", a long flash (0.6 seconds) corresponds to "1". Supported codes are listed in the "Blink" field of Table 5. The first blink corresponds to the right digit of the given numbers.

Table 5 - Possible malfunctions and their codes

Error Description	blink code
	OBD II	Blink
Malfunction of the gauge of frequency of rotation of a cranked shaft	P0725	00000 000
High speed sensor signal	P0726	00000 001
Failure of the pump speed sensor	P0720	00001 000
High signal level of the fuel pump speed sensor	Р0721	00001 001
Rail Position Sensor A Low	R1222	00011 000
High signal level of the rail position sensor A	R1223	00011 001
Rack A position sensor signal failure	R1220	00011 010
Rail Position Sensor B Low	R1227	00010 000
Rail Position Sensor B High	R1228	00010 001
Rail position sensor signal failure B	R1225	00100 010
Pedal Position Sensor A Low	P0222	00110 000
Pedal Position Sensor A High	P0223	00110 001
Pedal position sensor signal failure A	P0220	00110010
Pedal Position Sensor B Low	P0227	00111 000
Pedal Position Sensor B High	P0228	00111 001
Pedal Position Sensor B Signal Failure	P0225	00111 010
High boost pressure sensor signal	P0108	01000 001
Boost pressure sensor signal failure	P0105	01000 010
Charge air temperature sensor signal low	Р0112	01010 000
Charge air temperature sensor signal high	Р0113	01010 001
	Р0110	01010010
Low fuel temperature sensor signal	P0182	01011 000
High level fuel temperature sensor signal	P0183	01011 001
Charge air temperature sensor signal failure	P0180	01011 010
Low coolant temperature sensor signal	P0117	01100 000
High coolant temperature sensor signal	P0118	01100 001
Coolant temperature sensor signal failure	Р0115	01100 010
Low supply voltage sensor signal	P0562	01110 000
High supply voltage sensor signal	P0563	01110001
Supply voltage sensor signal failure	P0560	01110010
Low voltage level in the sensor power supply circuit	R1252	10001 000
High voltage level in the sensor power supply circuit	R1253	10001 001
Exceeding the emergency speed	P0219	10010 000

Table 5 continued

Data initialization error	Р0603	10010 001
Initial System Test Error	R1902	10010 010
EEPROM read error	R1800	10011 000
EEPROM write error	R1801	10011 001
EEPROM data error	R1802	10011 010
EEPROM data version mismatch	R1803	10011 011
Rail control key not responding	R1810	10100 000
Rail control key overtemperature	R1811	10100 001
No supply voltage on the rail control key	R1812	10100010
Shorted output / no load on rail control key	R1813	10100011

Table 6 shows detailed descriptions main errors, their types, possible reasons occurrence and methods of elimination.

Error types:

Warning - informational error, does not entail any ofchanges in software operation algorithms;

Critical - an error in which the continuation of a normaloperation of the system is impossible, leads to a forced shutdown of the engine.

Table 6 - Possible malfunctions and methods for their elimination

Cause	Elimination Method	Error type
Error "Frequency sensor signal failure" - no signal
	Check sensor connection	warning
Sensor defective	Replace sensor
Error "High signal level of the frequency sensor" - exceeding the permissible value
	Change sensor setting	warning
Incorrect sensor installation	Check sensor installation (clearance, angle of rotation)
Sensor defective	Replace sensor
Error "Low or high ADC sensor signal level"position sensors of rails, pedals, pressure and temperature, supply voltage)
Incorrect sensor setting	Change sensor setting or calibration	warning
Incorrect sensor installation	Check sensor connection and installation
Sensor defective	Replace sensor
Error "ADC sensor signal failure" - no signal (dposition sensors for rails, pedals, pressure and temperature, supply voltage)
No sensor	Install sensor	Warning, rail position sensor -critical
Shorting the sensor contacts to ground or power	Troubleshoot
Sensor defective	Replace sensor
Error "Low voltage in the sensor power supply circuit" - power failure
Low supply voltage	Check voltage	critical
Sensor defective	Replace sensor

Continuation of the table. 6

Cause	Elimination Method	Error type
Error "High voltage level in the sensor power supply circuit" - power failure
High supply voltage	Check voltage	critical
Sensor defective	Replace sensor
Error "Exceeding the emergency speed of the crankshaft"
Wrong setting	Check settings: Emergency speed; Speed ​​controller algorithms; Rotation speed sensors, position of the injection pump actuator	critical
Error "Error initializing data"
Mismatch between the current version of the program and the EEPROM data		critical
Error "Initial System Test Failed"
There is a signal from the crankshaft speed sensor	Stop the engine before turning on the ESU	critical
Disabled required sensors in settings	Check the settings of the speed sensors, the position of the actuator of the injection pump, the position of the pedal
No signals from required sensors	Check the speed sensors for the position of the actuator of the injection pump, the position of the pedal. Replace sensors if necessary
Wrong setting	Check the settings of the position sensor of the injection pump actuator, position regulator, control signal
Error "Error writing EEPROM - while saving data Error "Error reading EEPROM - while reading data
Faulty ESU unit	Replace block	warning
Error "EEPROM data error Error "Data version mismatch in EEPROM - when reading data
EEPROM data error	Update data in EEPROM	warning
Faulty ESU unit	Replace block
Error "Rail control key does not respond" - the control key of the rail drive solenoid does not work Error "No supply voltage on the rail control key"
No supply voltage	Check nutrition	critical
Faulty key	Replace block
Error "Rail control key temperature exceeded" - the temperature of the control key of the rack drive solenoid has been exceeded
Long exposure to high current	Check settings: Algorithms for the position regulator of the actuator of the injection pump; control signal	critical
Faulty key	Replace block
Error "Output short circuit / No load on the rail control key"
Not connected actuating mechanism High pressure fuel pump for ground or power	Eliminate	critical
Faulty key	Replace block

Figure 45 - Installing the wiring harness: 1 - actuator with position sensor; 2 - charge air pressure sensor 23.3855; 3 - coolant temperature sensor 192.3828; 4 - fuel temperature sensor; 192.3 "828; 5 - charge air temperature sensor 192.3828; 6 - crankshaft speed sensor 406.3847060-01; 7 - external engine control harness 6460-4071031-62; 8 - fuel cut-off valve.

ECM SERVICE

ECM elements are maintenance-free products and do not require adjustments, adjustments and Maintenance during operation.

The service life of the ECM is not less than the service life of the engine.

Repair of the electronic control unit must be carried out at the manufacturer or at specialized enterprises authorized by the manufacturer.

IT IS NOT ALLOWED TO SHORT THE CONTROL UNIT CONTACT CONNECTOR OUTPUTS TO THE MASS OR POSITIVE POLE OF THE POWER SUPPLY.

DO NOT REVERSE THE POLARITY OF THE POWER SUPPLY.

DO NOT OPEN - CLOSING THE CONTACT CONNECTOR OF THE ELECTRONIC CONTROL UNIT WHEN THE POWER SUPPLY IS ON.

In accordance with Euro 4 environmental standards, new engines have been installed on cars of the Kama Automobile Plant since 2013. It was possible to achieve compliance with such stringent standards thanks to the introduction of power units electronic engine management system. This made it possible to carry out early diagnostics of malfunctions, which are now displayed on the instrument panel as KamAZ Euro 4 error codes.

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Car Diagnostics

Before the advent of electronic engine control units (ECUs), Kama truck drivers had to determine the malfunctions of their vehicles based on their own experience. The number of errors in such a "diagnosis" was very large until the introduction of an ECU in KamAZ engines. This made troubleshooting much easier.

If the car has some kind of failure, even if it is not visually observed, then a check lights up on the instrument panel.

What ECU models are equipped with KAMAZ

Each driver of KamAZ 6520 Euro 4 needs to know that only two ECU models are used on engines of this brand:

• Bosch MS6.1;
• ISB CM 2150.

The Bosch MS6.1 control unit is installed on motors:

• 740.64-420;
• 740.63-400;
• 740.60-360;
• 740.61-320;
• 740.62-280;
• 740.65-240;
• 820.73-300;
• 820.72-240;
• 820.74-300;
• 820.60-260.

ECU ISB CM 2150 is used on a larger number of powertrain models;

• 740.64-420;
• 740.63-400;
• 740.60-360;
• 740.61-320;
• 740.62-280;
• 740.65-240;
• 740.75-440;
• 740.74-420;
• 740.73-400;
• 740.72-360;
• 740.71-320;
• 740.70-280.

How to diagnose yourself?

Many drivers are afraid to diagnose KamAZ 43253 Euro 4 with their own hands. There is nothing complicated in such a procedure and it is carried out quite simply.

For each model of the electronic unit, its own error marking is used. It is necessary to make self-diagnosis on KamAZ 65115 Cummins Euro-4 and get error codes for each ECU for further decoding.

On machines with a Bosch ECU, self-diagnosis of KAMAZ 43118 Euro-4 occurs as follows:

1. When starting the engine, the "Check" should light up for three seconds and go out, along with the oil pressure and battery charging lights. This means that the system is working.
2. If the signal icon does not go out, then this means that the system has detected a malfunction.
3. It remains to find out what is wrong with your KamAZ. To do this, the truck has a special button, it is located either on the left under the steering wheel or next to the fuse box.

Location of the "Check" button

More for self diagnosis the car does not need anything, but at specialized service stations, a special scanner is used to speed up diagnostics.

Equipment and software for diagnostics KAMAZ Euro 4

Truck service stations use the AVTOAS-CARGO diagnostic scanner to diagnose trucks.

On KamAZ trucks, using this scanner, you can diagnose the following engines:

• Cummins 4ISBe, 6ISBe, CM2150C (Euro 3);
• Cummins 4ISBe, 6ISBe, CM2150E (Euro 4);
• KAMAZ 740 E3, BOSCH MS 6.1;
• KAMAZ 740 E4, BOSCH EDC7UC31;
• YaMZ 656 E3, Elara 50.3763;
• YaMZ 656 E3, M230. E3.

To connect the scanner to a personal computer, an element such as an ECU-Link 3 adapter is used.

The software required to work with the AVTOAS-CARGO scanner is supplied with the scanner on a CD. On tablets and smartphones, the program can be downloaded from the official website of the manufacturer.

Error codes for engines with BOSCH ECU

You can get the error code using the button:

• under the steering wheel;
• on the fuse panel.

If you use the button under the steering wheel, then it has an up and down position, the button itself is in the neutral and middle position.

To obtain a fault code, you must:

1. For 2 seconds, hold down the button, either in the lower or in the upper position.
2. By blinking the "Check" icon on the instrument panel, determine the malfunction, which is expressed by the code.
3. The number of flashes with long intervals shows the first digit of the code, the number of flashes with short intervals - the second.

KAMAZ Euro 4 error code recognition scheme. In this case, the code is 24

• 11 - the gas pedal is faulty, with this fault the engine does not develop more than 1900 rpm;
• 12, 13 - the atmospheric pressure sensor is faulty;
• 14 - clutch malfunction, with this malfunction, the engine does not develop more than 1900 rpm;
• 15 - incorrect operation of the crankshaft, with this malfunction, the engine does not develop more than 1600 rpm;
• 16, 17 - incorrect operation of frequency rotation sensors, with this malfunction, the engine does not develop more than 1800 rpm;
• 18 - incorrect operation of the camshaft, with this malfunction, the engine does not develop more than 1800 rpm;
• 19 - malfunction of the main relay;
• 21, 22, 24–26 - malfunction of the high pressure fuel pump, with this malfunction, the engine does not start;
• 23 - incorrect position of the gas and brake pedals;
• 27 - malfunction of the steering rack, with this malfunction, the car will also not start;
• 28 - malfunction of the brakes;
• 29, 51–53, 81–86, 99 - incorrect operation of the electronic control unit, in this case you also cannot start your truck;
• 31, 32 - incorrect operation of the air temperature sensor;
• 33, 34 - incorrect operation of the air pressure sensor;
• 35 - cruise control malfunction;
• 36, 37 - the machine, or overheats, or vice versa, does not gain operating temperature;
• 38, 39 - fuel does not reach operating temperature;
• 41 - the signal from the multi-stage input does not correspond to the reference;
• 42 - the permissible engine speed has been exceeded;
• 43 - incorrect operation of the speedometer;
• 54 - increased voltage in the on-board network;
• 55 - incorrect operation of the control unit;
• 61-67 - incorrect operation of the CAN controller network, it is this system that is responsible for the correct operation anti-lock braking system brakes (ABS).

Error codes for engines with ECU ISB CM2150

It's over new block controls than BOSCH MS 6.1, it is the ISB CM2150 system that is installed on new car engines from Naberezhnye Chelny. On these cars, there are two "Check" signaling devices - yellow and red. If the error is lit with a yellow lamp, this means that you can drive the car, but if it lights up red, then your problem does not provide for the possibility of independent movement.

This system has 3 or 4 digit error codes. But they are obtained in the same way as in the previous case.

• 111 - incorrect operation of the engine control module;
• 115 - incorrect operation of the engine speed sensor;
• 143 - oil pressure has decreased;
• 146 - overheating of the coolant;
• 151 - the coolant does not gain operating temperature;
• 197 - not enough coolant;
• 214 - oil overheating;
• 233 - the pressure of the coolant is reduced, the pump is faulty;
• 234 - excessive engine speed;
• 235 - not enough coolant;
• 245 - reduced voltage in the fan control circuit;
• 261 - increased fuel temperature;
• 275 - the fuel pump does not work correctly;
• 281 - the high pressure valve does not work correctly;
• 351 - an error in the operation of the injector power supply;
• 415 - insufficient oil pressure;
• 422 - not enough coolant;
• 425 - oil temperature exceeded;
• 428 - incorrect;
• 429 - increased voltage in the fuel sensor circuit;
• 431 - error in the idle circuit;
• 432 - does not work correctly;
• 433 - insufficient fuel pressure;
• 434 - the mains supply disappeared after the engine was turned off;
• 435 - insufficient oil pressure;
• 441 - insufficient battery charging;
• 442 - recharging the battery;
• 449 - increased fuel pressure;
• 595 - turbocharging speed exceeded;
• 596 - incorrect operation of the generator, high voltage;
• 598 - insufficient voltage in the generator circuit;
• 687 - low turbocharger speed
• 689 - an error in the operation of the engine speed sensor;
• 1139 - incorrect operation of nozzle No. 1;
• 1141 - incorrect operation of nozzle No. 2;
• 1142 - incorrect operation of nozzle No. 3;
• 1143 - incorrect operation of nozzle No. 4;
• 1144 - incorrect operation of nozzle No. 5;
• 1145 - incorrect operation of nozzle No. 6;
• 2265 - the starting pump does not work correctly, the voltage is above normal;
• 2266 - the starting pump does not work correctly, the voltage is below normal;
• 2292 - the fuel metering device does not work correctly;
• 2293 - the fuel metering device does not work correctly;
• 2377 - voltage is exceeded in the fan control circuit;
• 2555 - in the incoming air heating system, the voltage is above normal;
• 2556 - in the incoming air heating system, the voltage is below normal;
• 2558 - the voltage is below normal in the auxiliary starting device circuit;
• 2973 - incorrect operation of the pressure sensor in the intake manifold.

The above method of obtaining errors is called the method using blink codes (removing data from the blinking “Check” signaling devices). In more detail, you can take data using computer equipment. There, error codes are displayed on the screen in the format “SPN number, FMI number”.

The list of errors and malfunctions in this format, there are much more of them than when diagnosing using blink codes:

• SPN 94 FMI 1 - insufficient pressure in the circuit low pressure fuel;
• SPN 94 FMI 0 - excessive pressure in the low fuel pressure circuit;
• SPN 106 FMI 4 - insufficient signal from the manifold air pressure sensor;
• SPN 106 FMI 3 - too strong signal from the manifold air pressure sensor;
• SPN 132 FMI 4 - too weak signal from the air flow sensor;
• SPN 132 FMI 3 - too strong signal from the air flow sensor;
• SPN 190 FMI 4 - weak signal with;
• SPN 723 FMI 4 - weak signal from the camshaft sensor;
• SPN 105 FMI 4 - weak signal from the manifold air temperature sensor;
• SPN 105 FMI 3 - too strong signal from the manifold air temperature sensor;
• SPN 629 FMI 12 - a malfunction in the control unit;
• SPN 523613 FMI 7 - rail pressure control valve malfunction;
• SPN 108 FMI 4 - weak signal from the atmospheric pressure sensor;
• SPN 108 FMI 3 - too strong signal from the atmospheric pressure sensor;
• SPN 523470 FMI 11 - malfunction of the pressure relief valve in the rail;
• SPN 174 FMI 16 - fuel temperature too high;
• SPN 110 FMI 4 - weak signal from the antifreeze temperature sensor;
• SPN 110 FMI 3 - too strong signal from the antifreeze temperature sensor;
• SPN 110 FMI 18 - the temperature of the power unit is too high;
• SPN 520224 FMI 12 - error in the control unit;
• SPN 520223 FMI 11 - control unit reset error;
• SPN 3050 FMI 1 - poor performance of the exhaust gas converter;
• SPN 3050 FMI 19 - no signal is received from the SCR system;
• SPN 190 FMI 8 - the crankshaft position sensor is not synchronized;
• SPN 190 FMI 5 - failure of the crankshaft position sensor;
• SPN 723 FMI 8 - incorrect operation of the camshaft position sensor;
• SPN 723 FMI 2 - incorrect operation of the camshaft position sensor;
• SPN 723 FMI 5 - no signal is received from the camshaft position sensor;
• SPN 84 FMI 11 - the speed sensor is faulty;
• SPN 110 FMI 0 - excessive engine temperature;
• SPN 172 FMI 0 - excessive air temperature in the intake manifold;
• SPN 74 FMI 0 - excessively high engine speed;
• SPN 2634 FMI 5 - no current in the main relay circuit;
• SPN 2634 FMI 4 - ground fault of the main relay circuit;
• SPN 2634 FMI 3 - short to power supply of the main relay circuit;
• SPN 1351 FMI 5 - no current in the air conditioner relay circuit;
• SPN 1351 FMI 4 - short to ground of the air conditioner relay circuit;
• SPN 1351 FMI 3 - short to power supply of the air conditioner relay circuit;
• SPN 1213 FMI 5 - no current in the "CHECK ENGINE" circuit;
• SPN 1213 FMI 4 - short to ground in the "CHECK ENGINE" circuit;
• SPN 1213 FMI 3 - short to power in the "CHECK ENGINE" circuit;
• SPN 94 FMI 4 - weak signal from the low pressure fuel sensor;
• SPN 94 FMI 3 - too strong signal from the low pressure fuel sensor;
• SPN 91 FMI 13 - incorrect signal from track 1 of the gas pedal position sensor;
• SPN 29 FMI 13 - incorrect signal from track 2 of the gas pedal position sensor;
• SPN 158 FMI 1 - insufficient voltage in the on-board circuit;
• SPN 158 FMI 0 - excessive voltage in the on-board circuit;
• SPN 651 FMI 5 - failure of the nozzle of 1 cylinder;
• SPN 651 FMI 4 - short to ground injector 1 cylinder;
• SPN 651 FMI 3 - Short to power injector 1 cylinder;
• SPN 652 FMI 5 - cylinder 2 injector failure;
• SPN 652 FMI 4 - short to ground injector 2 cylinders;
• SPN 652 FMI 3 - Short to power injector 2 cylinders;
• SPN 653 FMI 5 - failure of the nozzle of the 3rd cylinder;
• SPN 653 FMI 4 - short to ground injector 3 cylinders;
• SPN 653 FMI 3 - short to power injector 3 cylinders;
• SPN 654 FMI 5 - cylinder 4 injector failure;
• SPN 654 FMI 4 - short to ground injector 4 cylinders;
• SPN 654 FMI 3 - short to power injector 4 cylinders;
• SPN 2791 FMI 5 - there is no voltage in the EGR valve circuit;
• SPN 2791 FMI 4 - short to ground in the EGR valve circuit;
• SPN 2791 FMI 3 - short to ground in the EGR valve circuit;
• SPN 523470 FMI 5 - there is no voltage in the pressure relief valve circuit;
• SPN 523470 FMI 4 - short to ground in the pressure relief valve circuit;
• SPN 523470 FMI 3 - short to ground in the pressure relief valve circuit;
• SPN 630 FMI 12 - malfunction of the RAM control unit;
• SPN 628 FMI 12 - malfunction of the ROM control unit;
• SPN 1188 FMI 5 - there is no voltage in the turbo boost pressure valve regulator circuit;
• SPN 1188 FMI 4 - short to ground in the turbocharger pressure valve regulator circuit;
• SPN 1188 FMI 3 - short to ground in the turbo boost pressure valve regulator circuit;
• SPN 523613 FMI 5 - there is no voltage in the circuit leading to the ramp regulator valve;
• SPN 523613 FMI 4 - short to ground in the circuit leading to the ramp regulator valve;
• SPN 523613 FMI 3 - short to ground in the circuit leading to the ramp regulator valve;
• SPN 977 FMI 5 - there is no voltage in the fan relay circuit;
• SPN 977 FMI 4 - short to ground in the fan relay circuit;
• SPN 977 FMI 3 - ground fault in the fan relay;
• SPN 645 FMI 5 - there is no voltage in the tachometer circuit;
• SPN 645 FMI 4 - short to ground in the tachometer circuit;
• SPN 645 FMI 3 - short to ground in the tachometer circuit;
• SPN 107 FMI 16 - air filter needs to be replaced;
• SPN 98 FMI 4 - bad signal from the oil pressure sensor;
• SPN 98 FMI 3 - too strong signal from the oil pressure sensor;
• SPN 157 FMI 4 - bad signal from the rail pressure sensor;
• SPN 157 FMI 3 - too strong signal from the fuel pressure sensor in the rail;
• SPN 157 FMI 1 - insufficient fuel pressure in the rail;
• SPN 157 FMI 0 - excessive fuel pressure in the rail;
• SPN 639 FMI 19 - controller circuit broken automatic box gears (AKP);
• SPN 91 FMI 2 - gear sensor tracks are incorrectly located;
• SPN 1136 FMI 12 - the temperature sensor in the controller is faulty;
• SPN 523601 FMI 4 - weak signal from the refrigerant pressure sensor;
• SPN 523601 FMI 3 - too strong signal from the refrigerant pressure sensor;
• SPN 1321 FMI 5 - no connection with the starter blocking relay;
• SPN 1321 FMI 4 - the starter blocking relay is closed to ground;
• SPN 1321 FMI 3 - the starter blocking relay is closed to power;
• SPN 3509 FMI 31 - 5V failure in sensor power supply 1
• SPN 3510 FMI 31 - 5V failure in sensor power supply 2
• SPN 3511 FMI 31 - 5V failure in the power supply of sensors 3
• SPN 3512 FMI 31 - 5V failure in the power supply of sensors 4
• SPN 3513 FMI 31 - 5V failure in sensor power supply 5
• SPN 3514 FMI 31 - the power supply of the 12 V sensors is faulty;
• SPN 106 FMI 2 - the air pressure sensor does not work correctly;
• SPN 110 FMI 2 - antifreeze temperature sensor does not work correctly;
• SPN 173 FMI 0 - excessive antifreeze temperature;
• SPN 175 FMI 0 - excessive oil temperature;
• SPN 174 FMI 0 - excessive fuel temperature;
• SPN 174 FMI 4 - weak signal from the fuel temperature sensor;
• SPN 174 FMI 3 - too strong signal from the fuel temperature sensor;
• SPN 596 FMI 4 - weak signal from the KK control knob;
• SPN 596 FMI 3 - too strong signal from the KK control knob;
• SPN 655 FMI 5 - failure of the nozzle of the 5th cylinder;
• SPN 655 FMI 4 - nozzle 5 of the cylinder is closed to the ground;
• SPN 655 FMI 3 - nozzle 5 of the cylinder is closed to power;
• SPN 656 FMI 5 - failure of the nozzle of the 6th cylinder;
• SPN 656 FMI 4 - nozzle 6 of the cylinder is closed to the ground;
• SPN 656 FMI 3 - nozzle 6 of the cylinder is closed to power;
• SPN 657 FMI 5 - failure of the nozzle of the 7th cylinder;
• SPN 657 FMI 4 - nozzle 7 of the cylinder is closed to the ground;
• SPN 657 FMI 3 - nozzle 7 of the cylinder is closed to power;
• SPN 658 FMI 5 - failure of the nozzle of the 8th cylinder;
• SPN 658 FMI 4 - nozzle 8 of the cylinder is closed to the ground;
• SPN 658 FMI 3 - nozzle 8 of the cylinder is closed to power;
• SPN 1347 FMI 5 - no communication with the fuel pump relay;
• SPN 1347 FMI 4 - the fuel pump relay is shorted to ground;
• SPN 1347 FMI 3 - the fuel pump relay is closed to power;
• SPN 3050 FMI 15 - the exhaust gas converter is faulty;
• SPN 3050 FMI 0 - the exhaust gas converter is faulty;
• SPN 729 FMI 5 - no connection with the air heating relay;
• SPN 729 FMI 4 - air heating relay closed to ground;
• SPN 729 FMI 3 - the air heating relay is closed to power;
• SPN 1188 FMI 5 - no connection with the OG-1 bypass valve;
• SPN 1188 FMI 4 - the OG-1 bypass valve is closed to ground;
• SPN 1188 FMI 3 - the OG-1 bypass valve is closed to power;
• SPN 1189 FMI 5 - no connection with the OG-2 bypass valve;
• SPN 1189 FMI 4 - the OG-2 bypass valve is closed to ground;
• SPN 1189 FMI 3 - the OG-2 bypass valve is closed to power;
• SPN 91 FMI 4 - bad signal from the pedal position sensor;
• SPN 1137 FMI 15 - overheating through the TOG channel No. 1;
• SPN 1138 FMI 15 - overheating through the TOG channel No. 2;
• SPN 190 FMI 12 - high resistance DPKV;
• SPN 723 FMI 12 - high resistance of the DPRV;
• SPN 1137 FMI 4 - weak signal from the TOG sensor No. 1;
• SPN 1137 FMI 3 - a strong signal from the TOG sensor No. 1;
• SPN 1138 FMI 4 - weak signal from the TOG sensor No. 2;
• SPN 1138 FMI 3 - strong signal from the TOG sensor No. 2;
• SPN 171 FMI 4 - weak signal from the ambient temperature sensor;
• SPN 171 FMI 3 - strong signal from the ambient temperature sensor;
• SPN 29 FMI 4 - weak signal from pedal position sensor 2;
• SPN 29 FMI 3 - a strong signal from the pedal position sensor 2;
• SPN 29 FMI 5 - failure of the pedal position sensor 1;
• SPN 91 FMI 5 - failure of the pedal position sensor 2;
• SPN 1318 FMI 14 - inconsistent operation of sensors TOG No. 1 and TOG No. 2;
• SPN 175 FMI 16 - too high oil temperature in the power unit;
• SPN 175 FMI 4 - weak signal from in the power unit;
• SPN 175 FMI 3 - too strong signal from the oil temperature sensor in the power unit;
• SPN 100 FMI 1 - low oil pressure;
• SPN 1072 FMI 5 - no connection with the engine brake valve;
• SPN 1072 FMI 4 - engine brake valve closed to ground;
• SPN 1072 FMI 3 - engine brake valve is closed to power;
• SPN 84 FMI 0 - the car has exceeded the technically permissible speed;
• SPN 102 FMI 0 - too high turbo pressure;
• SPN 100 FMI 4 - weak signal from the oil pressure sensor;
• SPN 100 FMI 3 - too strong signal from the oil pressure sensor;
• SPN 110 FMI 5 - no connection with;
• SPN 172 FMI 5 - failure of the air temperature sensor in the manifold;
• SPN 174 FMI 5 - failure of the fuel temperature sensor;
• SPN 175 FMI 5 - failure of the oil temperature sensor;
• SPN 111 FMI 4 - weak signal from the antifreeze level sensor;
• SPN 111 FMI 3 - too strong signal from the antifreeze level sensor;
• SPN 723 FMI 3 - strong signal from the camshaft position sensor.

Sometimes on the forums you can find the question, what kind of error is SPN 791, SPN 520211 or SPN 4335. There are no such codes in the list of errors for KamAZ 65117, or KamAZ Euro 4 Cummins 4336, and other models. The reason for their appearance may lie in the fact that the drivers incorrectly removed the data from the computer or there is some kind of non-serial electronic system on the truck.

How to reset errors on KamAZ Euro 4

Quite often, such a situation occurs when, during the diagnosis, you considered that the breakdown is insignificant and repair is not required yet, since it does not affect the operation. However, its presence imposes some restrictions on the operation of the machine: it may not start, or the engine speed may be limited.

The ABS has a built-in self-diagnosis, the system continuously monitors its own performance. To force a health check for troubleshooting, you must enable Forced Diagnostics.

The electronic unit is switched on in the forced diagnostics mode by pressing and holding down for 1 - 2 seconds the ABS diagnostics key (see Fig. Dashboard) with the "ground" switch and the starter and instrument switch on (the lock rotor must be turn the key to the "I" position.

In this case, if the diagnostic lamp was on before entering the diagnostic mode (which indicates the presence of active errors, i.e. errors or malfunctions present at the time of diagnosis), then when the button is pressed, it goes out for about 1 second, and then a cyclically repeating active error code every 4 seconds until the problem is cleared.

The light flashing code of an active error about the nature of the malfunction and the faulty element of the system consists of two information blocks, which are two blocks of light flashes. The duration of each flash is 0.5 seconds, the pause between flashes is 0.5 seconds, between blocks is 1.5 seconds. The faulty component and the nature of the fault is determined by the number of flashes of the diagnostic lamp, respectively, in the first and second blocks, according to the table Light codes for the status of ABS elements. In the absence of failures or malfunctions, a light code 1-1 is issued (one flash of a control lamp in each information block). If there are several active errors in the system, then after the first error is cleared, the second active error will flash, and so on. (until all problems are fixed).

After eliminating all active errors, it is necessary to turn the lock rotor in the starter and instrument switch with the key first to position “0”, and then to position “I”.

If there are no active errors, then in the diagnostic mode, flash codes of the last 4 passive or “floating” errors are displayed sequentially (every 4 seconds), i.e. errors that were, but are absent at the time of diagnosis (or remained not erased in the memory of the block). Information about passive errors is issued 1 time. To re-display the light code of passive errors, you must press the diagnostic button again, as described above.

KAMAZ 65115. ABS control system mode

In the system mode, the system configuration can be determined, the last four (passive) errors can be erased from the memory of the electronic unit and the system can be reconfigured.

To activate the system mode, press the diagnostic key (see Fig. Dashboard) and hold it on for 3.0 to 6.3 seconds. When the system mode is activated, all passive errors are automatically erased if they were in the unit's memory. A sign of this will be 8 fast (0.1 second duration) flashes of the diagnostic lamp. If there are active errors, then the specified blinks will not follow, and the configuration code will be issued immediately.

The configuration light code is issued after the system mode is activated (4S / 4M type system 4 sensors / 4 modulators is installed on KamAZ vehicles), the number of lamp flashes must be equal to 2 (two light flashes lasting 0.5 seconds with a pause of 1.5 seconds). The configuration code is repeated every 4 seconds. To exit the system mode, it is necessary to turn off and re-enable the starter and instrument switch to the “instruments” position or press the diagnostic button for a while, from 6.3 to 15 seconds. In this case, the output of light codes to the diagnostic lamp stops.

If erasing the fault code is difficult (after repeated erasing operations, the same code remains), you must once again make sure that the corresponding fault has been eliminated and repeat the operations until code 1-1 is received.

Light codes for the status of ABS elements

light code	Faulty element	Nature of the fault	elimination
Ra - Rb
1 - 1	All elements are correct.	-	-
2 - 1 2 - 2 2 - 3 2 - 4	Modulator B Modulator A Modulator D Modulator C	Open or short to ground. Open or short to ground. Open or short to ground.	Check connecting cables, connection to the unit and modulator. Repair damage. If there is no damage, replace the modulator.
3 - 1 3 - 2 3 - 3 3 - 4	Sensor B Sensor A Sensor D Sensor C	Large air gap Large air gap Large air gap Large air gap	Adjust the gap between the sensor and the rotor. The maximum gap is 1.3 mm.
4 - 1 4 - 2 4 - 3 4 - 4	Sensor B Sensor A Sensor D Sensor C	Short circuit or open circuit Short circuit or open circuit Short circuit or open circuit	Check sensor, connection to unit and sensor, sensor cable for an open or short circuit. Eliminate. Replace sensor.
5 - 1 5 - 2 5 - 3 5 - 4	Sensor B Sensor A Sensor D Sensor C	Intermittent signal Intermittent signal Intermittent signal Intermittent signal	Check the cable and signal level of the sensor when the wheels are rotating Check the integrity of the rotor.
6 - 1 6 - 2 6 - 3 6 - 4	Sensor B Sensor A Sensor D Sensor C	Rotor/sensor defect Rotor/sensor defect Rotor/sensor defect Rotor/sensor defect	Replace sensor or rotor.
7 - 1	Communication with BU	Communication error	Check wiring. Troubleshoot (see fig. circuit diagram ABS connections). Check control unit, replace if defective.
7 - 3	Auxiliary brake relay		Check the relay cable for an open or short circuit. Eliminate. Check the functionality of the relay.
7 - 4	ABS diagnostic lamp	Short circuit or open circuit	Check the lamp cable for an open or short circuit. Eliminate. Check lamp operation.
8 - 1	Power supply BU	Reduced voltage of the on-board network	Check batteries and fuses. Provide voltage 24-28V (see Fig. Principal diagram of ABS connections).
8 - 2	Power supply BU	Increased voltage of the onboard network	Check vehicle voltage relay. If necessary, replace.
8 - 3	BOO	Internal error	Replace CU
8 - 4	BOO	Configuration error	Replace CU
8 - 5	Power supply BU	Ground connection error	Check if the connection is correct. Troubleshoot

Trouble-shooting

Cause of malfunction brake system there may be a failure in the operation of pneumatic devices, violation of adjustments, as well as leaks compressed air in the pneumatic drive due to leaks in the connections of pipelines and flexible hoses. Leaks in the pneumatic drive circuits are signaled by luminous warning lamps (see Fig. Instrument panel and Control lamp units) and a buzzer. When the pressure in the circuits exceeds 450-550 kPa (4.5-5.5 kgf / cm2), the lamps should go out, and at the same time the buzzer should stop sounding. The time for filling the receivers with compressed air to the rated pressure should not exceed 8 minutes at the rated speed of the engine crankshaft.

Check the tightness of the pneumatic actuator at nominal pressure, the compressed air consumers are switched on and the engine is not running. Locate large air leaks by ear. Minor leaks can be identified by coating pipe connections with soapy emulsion.

When troubleshooting, use Schemes of pneumatic drive of brake systems, which conditionally depict brake devices and pipelines connecting them.

Pneumatic drive of brake systems of single KAMAZ vehicles models 53229, 55111, 6511 5

1 - water separator;
2 - compressor;
3 - cooler;


6 - pressure regulator;

8 - brake valve;





14 - pressure gauge;

16 - receiver circuit IV
17 - receiver circuit II;
18 - condensate drain valve;

20.24 - accelerating valves;


23 - receivers of circuit III;
25 - receiver circuit I;


28 - ABS modulators;
29 - ABS speed sensor;

Pneumatic actuator of the brake system of KAMAZ vehicles, models 55111, 65115, working with a trailer

1 - water separator;
2 - compressor;
3 - cooler;
4 - four-circuit protective valve;
5 - automatic regulator braking forces;
6 - pressure regulator;
7 - brake signal switch;
8 - brake valve;
9 - pneumatic cylinders for the drive of the damper of the mechanism of the auxiliary brake system;
10 - parking brake control valve;
11 - proportional valve;
12 - pneumatic cylinder of the drive of the engine stop lever;
13 - control valve for the auxiliary brake system;
14 - pressure gauge;
15 - front brake chamber;
16 - receiver circuit IV;
17 - receiver circuit II;
18 - condensate drain valve;
19 - rear brake chamber;
20, 24 - accelerating valves;
21 - two-line bypass valve;
22 - switch of the control lamp of the parking brake system;
23 - receivers of circuit III;
25 - receiver circuit I;
26 - switch of the control lamp for the drop in air pressure in circuit III;
27 - emergency release valve;
28 - ABS modulators;
29 - ABS speed sensor;
30 - moisture-oil separator with pressure regulator;
31 - trailer brake control valve;
32 - automatic connecting heads;
A, B, C, D - control outlet valves.

Serious car exhibiting inappropriate behavior? The whims of your truck can tear up business agreements and lead to long periods of downtime, emptying your wallet. In this article, we'll show you how to diagnose problems early so that you can start fixing problems in a timely manner.

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Electronic control systems KAMAZ

Recently, Kama engines car factory began to be classified according to belonging to one or another class of environmental friendliness (from euro-0 to euro-4). The technical implementation of the Euro-3 class, and then the Euro-4 class, adopted since 2013, turned out to be impossible without the use of electronic engine control systems (ECM). This is what led to the ability to produce using universal .

Various configurations KAMAZ trucks began to be equipped with engines with electronic control units (ECU). And if now the driver is worried about unhealthy behavior during the operation of the famous trucks, symptoms appeared in the form of floating revolutions, loss of traction, unusual noises, increased consumption diesel fuel, self-diagnosis comes to the rescue.

Using the information output from the ECU in the form of an error code, it is possible to indicate the exact electrical diagnosis for KAMAZ. The process of diagnosing and decoding codes depends on the type of electronic system installed on the truck. Before starting diagnostics, it is proposed to determine the type of computer according to the installed engine model.

Self Diagnosis Regardless of which company your V8 is manufactured by, Cammins Inc. (Cummins) or KAMAZ LLC, fuel supply systems from " common rail» and recycling exhaust gases(EGR) or neutralization system (SCR), diagnostics will be carried out in accordance with these two types.

The process of self-diagnosis of KAMAZ electronic systems in Euro-3, -4 engines differs slightly from a similar procedure in other vehicles. After pressing a certain button, one of or a block of signaling devices will start flashing at different intervals, the number of flashes of the lamp of one interval determines the code digit.

Engine with ECU BOSCH MS 6.1

So, let's get comfortable in the cab of our KAMAZ, then turn on the ignition with the usual turn of the key. Together with many other indicators, the diagnostic control lamp or “Check Engin” lights up, in common people - a submarine. The lamp lights up for 3 seconds and goes out, thereby demonstrating its performance and serviceability of the ECM. If the lamp does not go out or lights up when the engine is running, a malfunction has been found in the electronic system!

Let's pay attention to the diagnostic mode rocker button (often mounted on the instrument panel on the left, under the steering wheel) or this mode button (often located next to the fuse box, under the panel opposite the passenger seat). The "rocker" has two extreme positions for holding and a central fixed position.

Lower the rocker to the extreme upper or lower position and hold it there for more than two seconds. It is enough to press the button and do not release the above time. After the "rocker" or the button is returned back, the diagnostic lamp will flash first in long intervals, and then in short intervals. The number of long flashes determines the first bit of the error code, the number of short flashes - the second bit.

The diagram shows an example of obtaining code 24. We correlate the error code (otherwise blink code, from English blink - blink) with the table below.

Error codes for ECU BOSCH MS6.1 for Euro-3 eco-class engines
Error code	Description of the fault	Operating restrictions set by the computer
11	gas pedal	engine speed is limited 1900 rpm
12, 13	atmospheric pressure sensor	not limited
14	clutch sensor	engine speed is limited 1900 rpm
15	frequency crankshaft rotation sensor	engine speed is limited 1600 rpm
16, 17	incorrect polarity of frequency rotation sensors sensors installed incorrectly	engine speed is limited 1800 rpm
18	frequency camshaft rotation sensor	engine speed is limited 1800 rpm
19	main relay	not limited
21, 22, 24-26	high pressure fuel pump	engine start failure
23	inconsistent position of the gas and brake pedals	not limited
27	bad contact of rail position sensor	engine start failure
28	brake pedal sensor	not limited
29, 51-53, 81-86, 99	electronic control unit	engine start failure
31, 32	air temperature sensor	not limited
33, 34	air pressure sensor	not limited
35	cruise control module	not limited
36, 37	liquid cooling temperature sensor	engine speed is limited 1900 rpm
38, 39	fuel temperature sensor	engine speed is limited 1900 rpm
41	the signal from the multi-stage input does not match the reference	not limited
42	maximum engine speed exceeded	the wrong gear may have been selected. Reset error when restarting the engine
43	speed signal error	engine speed is limited 1500 rpm
54	excess onboard voltage	not limited
55	incorrectly completed cycle of the control unit	not limited
61-67	CAN line	not limited

It is not uncommon for the ECU to record several errors, to view the following code, repeat the above steps with the button or rocker. Error codes will be played cyclically. No more than five faults are recorded in the ECU memory. To delete all errors from the memory of the control unit, you must turn on the ignition and hold the "rocker" for five seconds. Thus, it is possible to briefly rid the car of disturbing symptoms in the form of electronic restrictions.

Engine with ECU ISB CM2150

This type of ECU was installed on later KAMAZ models and the diagnostics in this case will differ from the above diagram. After the ignition is switched on, the currently active malfunction is recorded in the memory of the electronic unit, in addition, the malfunction can be signaled by a red or yellow control diagnostics lamp.

After pressing the "rocker" to any extreme position for more than two seconds, a fault code will be displayed with a half-second interval between flashes of one of the two lamps. The bits of the error code are separated by a 2 second pause. Unlike the previous type of ECU, the resulting code will be three or four digits!

We correlate the error code with the table below. The color of the rows in the table is correlated with the color of the control diagnostics lamp. The red color of the indication indicates the impossibility to start or continue driving with this malfunction, the yellow color indicates the need to eliminate the malfunction after the vehicle has been driven.

Error codes for ECU ISB CM2150 for Euro-3 eco-class engines
111	Critical failure inside the engine control module - the intelligent programmable or its component does not work correctly	422	Coolant level - errors are coming	689	Error in the sensor of the primary number of revolutions of the motor - errors are coming
115	In the circuit of the engine speed (position) sensor, the loss of a pair of signals from the electromagnetic sensor - errors are received	425	Engine lubrication temperature - erroneous data is being received	1139	Injector Cylinder #1 - Mechanical system misfiring or misadjusted
143	Reduced oil pressure - reliable data, but below the optimal operating range	428	Water in the fuel sensor circuit - voltage is above normal, or the circuit is shorted to a high voltage source	1141	Injector cylinder No. 2 - mechanical system works incorrectly or is not adjusted
146	The coolant temperature is above normal - reliable data, but above the optimal operating range	429	Water entering the fuel sensor circuit - voltage is above normal, or the circuit is shorted to a low voltage source	1142	Nozzle Cylinder #3 - Mechanical system not working properly or out of adjustment
151	Coolant temperature below normal - good data, but above optimal operating range	431	Idle Test Circuit, Accelerator Pedal or Lever - Incorrect Data Coming	1143	Nozzle Cylinder No. 4 - the mechanical system does not work correctly or is not adjusted
197	Coolant level - good data, but below optimal operating range	432	The chain of verification of work on Idling, accelerator pedal or lever - out of calibration	1144	Injector Cylinder #5 - Mechanical system misfiring or misadjusted
214	Engine oil temperature - reliable data, but above the optimal operating range	433	Intake manifold pressure sensor circuit - erroneous values ​​are received	1145	Injector Cylinder #6 - Mechanical system misfiring or misadjusted
233	Coolant pressure - valid data, but below the optimal operating range - moderately intense level	434	Power failure without turning off the ignition (Ignition Off) - errors are received	2265	Start pump control signal circuit - voltage above specification, or shorted to a high voltage source
234	High engine speed - valid data, but above optimal operating range	435	Circuit - errors are coming	2266	Start pump control signal circuit - voltage below normal, or shorted to a low voltage source
235	Lack of cooling fluid - good data, but below the optimal operating range	441	#1 Battery Low - Valid Data, But Below Optimal Operating Range	2292	Fuel metering device - reliable data, but above the optimal operating range
245	Fan control circuit - voltage below normal or shorted to a low voltage source	442	#1 Battery High Voltage - Valid Data, But Above Optimal Operating Range	2293	Fuel metering device - flow demand lower than expected - valid data but below optimal operating range
261	Engine fuel temperature - reliable data, but above the optimal operating mode	449	High fuel pressure - reliable data, but above the optimal operating range	2377	Fan control circuit - voltage above normal or shorted to a high voltage source
275	Fuel injection element (front) - mechanical system does not work correctly or is not adjusted	595	#1 turbocharger high speed - valid data, but above optimal operating range	2555	Intake Air Heater #1 Circuit Voltage High or Shorted to High Voltage
281	Solenoid operated high pressure fuel valve #1 - mechanical system not working correctly or out of adjustment	596	Charging electrical system voltage high - valid data, but above optimal operating range	2556	Intake Air Heater #1 Circuit Voltage Below Normal or Shorted to Low Voltage Source
351	Injector power supply - faulty smart-programmable device or component	598	Charging Electrical System Voltage Low - Valid Data, But Below Optimum Operating Range	2558	PWM (Pulse Width Modulation) Auxiliary Trigger #1 - Voltage Below Normal or Circuit Shorted to Low Voltage Source
415	Low oil pressure - reliable data, but below the optimal operating range	687	#1 turbo low speed - good data, but below optimal operating range	2973	Intake manifold pressure sensor circuit - erroneous data is being received

If you did not find your engine brand or error code for the ISB CM2150 ECU in the table, be sure to write to us and we will immediately try to help.