The electronic diesel control system allows to reduce fuel consumption and emissions of toxic components with exhaust gases (exhaust gases), to improve the quality of regulation (accuracy, smoothness and speed) and stability of the idle speed, to reduce the rigidity of the diesel engine's working process.

The electronic control system of a diesel engine consists of sensors and switches, an electronic control unit and actuators that directly affect the engine systems.

The completeness of the engine management system with sensors and actuators depends on the toxicity standard that the engine complies with (for example, Euro-3 or Euro-4), vehicle equipment, and the purpose of the vehicle.

Information about the operating mode and state of the engine enters the control system from sensors that convert the monitored (measured) engine parameters into electrical signals that are convenient for processing and transmission in the electronic control system. The signals from the sensors go to the electronic control unit, which, having processed the information received according to the given algorithms, issues control signals to the actuators based on the driver's requests and the programmed program.

The control algorithms implemented by the microprocessor of the electronic unit, at each engine operating mode, produce the optimal (best) combination of fuel injection parameters (cycle supply and injection advance angle) and air charge (boost pressure and degree of exhaust gas recirculation) in terms of fuel consumption and toxicity standards.

The electronic control unit performs such operations as control of the cyclic fuel supply, fuel pressure in the battery, control of the injection advance angle, idle speed control, cruise control function, control of the elements of the emission reduction subsystems.

To simplify troubleshooting, a self-diagnosis function is built into the electronic control unit, which monitors many operating parameters of both the engine itself and all elements of the control system, and when a malfunction is detected, it informs the driver about this by turning on the malfunction indicators on the instrument panel.

Self-diagnosis system

To enable the diagnostic mode, you must set the ignition switch to the "I" position and turn on the test switch.

In this mode, red and yellow indicators light up, in the absence of faults they are inactive. If there is an active fault, the red LED starts flashing.

The diagnostic system monitors four engine parameters: coolant level, coolant temperature, oil pressure and air temperature at the intake manifold, and derates the engine if one or more of these parameters is out of range.

The Engine Guardian System can apply a derating function to torque, engine speed, and eventual engine stalling in a progressive manner.

The ECU stores in memory data on the time of occurrence of events, the duration of the operation, extreme values ​​of pressure and temperature when the ECU detects abnormal operating conditions.

Details of the data list are displayed using the programming tool.

The diagnostic test switch is designed to turn on and off the diagnostic mode carried out on board the bus.

When the diagnostic mode is turned on, the stop lamp (STOP) and the warning lamp (ICE) will illuminate all active fault codes.

The switch for diagnostics and increase / decrease in idle speed at low speed is a two-function two-position switch without latching position, after turning on the diagnostic mode, it allows you to move through the list of fault codes.

This switch is also used when adjusting idle speed at low rpm.

The default travel step length is 25 RPM in positive and negative increments to idle at low rpm.

Диагностика двигателя Cummins ISF3.8

The system uses four indicator lamps: stop lamp, warning lamp, maintenance lamp and start-up standby lamps.

When the rocker switch is set to position "1" ("switch on electrical equipment"), the indicator lamps come on and after about two seconds they go out, one after the other - in this way, it is confirmed that the lamps are in working order and that they are connected correctly ...

In the event of a high coolant temperature, high air temperature in the intake manifold, low oil pressure or low coolant level, the indicator lights up and starts flashing after a certain time.

This flashing mode warns that a condition that has occurred has lasted for some time and that the subsequent pressure or temperature condition has deteriorated and the engine is close to a stalled state (ECU engine may stop).

The warning indicator (ICE) warns of a malfunction and signals the start of flashing codes during on-board diagnostics.

Turning on the lamp signals a malfunction of the engine, while the vehicle remains in working condition (the situation is not emergency). It is necessary to service the vehicle to eliminate the failure.

The stop indicator (STOP) signals a malfunction of one of the main systems. During OBD, the flashing of this lamp corresponds to the fault codes detected by the ECU.

Turning on the lamp warns of a serious malfunction. In this case, the bus engine must be turned off as soon as possible, as far as safety requirements permit.

The Maintenance Indicator (KEY) is used to alert the driver when service is required and to warn the driver that the condition of the fluids in the engine is out of range.

A standby start indicator (START) warns the driver that cold start aids are required to ensure proper starting.

Flash codes of malfunctions

To display fault codes, turn off the engine, turn the ignition switch to position "I" and turn on the diagnostic mode with the diagnostic test switch.

If there are no active faults, the shutdown and warning light remain on but not flash. But if there are active fault codes, then the ECU starts flashing fault codes.

Before the start of the display of the malfunction code, the warning lamp is turned on, after it is turned off, the computer displays (blinks) with the stop lamp the number of the active malfunction code (short pauses indicate the end of the sign).

Turning on the warning lamp again means that the stop lamp starts showing (blinking) the next number of active fault codes (function of separating the next fault code from the previous one).

The ECU continues to flash the DTC until the user uses the diagnostic switch to toggle the DTC to the next or previous DTC.

The control system uses three- and four-digit trouble codes. The diagnostic mode remains active until the diagnostic switch is turned off or the engine is turned on.

External diagnostic tools include:

- INSITE: Windows based computer service tool for Cummins electronic engines.

Designed to assist in the detection and elimination of engine malfunctions.

- Shared scanners: The module supports shared scanners via the public data links J1587 and J1939 for CES 14601.

INSITE allows the user to display both active and inactive fault codes on the display, and erase only inactive fault codes from the ECU.

INSITE also provides engine monitoring and special diagnostic test facilities.

The data link is activated when the ignition key is in the "I" position, regardless of whether the engine is running or not.

The data link is used with tools offered by Cummins.

Diagnostic Trouble Codes

The code

Conditions for the appearance of the code

Result

Possible fault location

111

Internal ECU error

engine may not start

Electronic control unit

115

crankshaft and camshaft position sensors - both signals are not present, the data is different from the specified, intermittent or incorrect.

The ECU detects the main and standby position sensor signals as connected in reverse.

engine may not start

The wiring of the crankshaft and camshaft sensors is reversed

122

Short circuit on the power supply of the boost pressure sensor circuit

Reduced engine power

- Wiring and connectors.

- A short to power supply.

123

Short circuit on a low voltage circuit or an open circuit of the boost pressure sensor

Reduced engine power

- Open or short to ground in the signal circuit or sensor.

- Open or short circuit to ground of the power circuit.

131

Short circuit on the power supply of the accelerator pedal position sensor circuit (channel No. 1)

Some reduction in engine power. Get home mode.

- A short to power or 5 V of the sensor signal circuit.

- Broken ground wire of the accelerator pedal position sensor.

- Short circuit to the power supply of the supply wire of the sensor.

132

Short circuit on the low voltage circuit of the accelerator pedal position sensor circuit (channel No. 1)

Some reduction in engine power. Get home mode.

- Short circuit to ground or

Ground wire of the sensor signal wire.

- accelerator pedal position sensor.

- Broken wiring or connector.

133

Short circuit on the power supply of the remote control accelerator position sensor circuit

The remote control accelerator pedal does not work. The pedal opening degree is set to 0%.

- Short circuit to power or 5 V signal circuit of the remote control accelerator position sensor.

- Broken ground wire of the sensor.

- Short circuit to the power supply of the supply wire of the sensor.

- remote control accelerator position sensor.

134

Short circuit on a chain of low voltage of a chain of the sensor of position of the accelerator of the remote control

The remote control accelerator pedal does not work. The pedal opening degree is set to 0%.

- Short circuit to ground or ground wires of the sensor signal wire.

- remote control accelerator position sensor.

- Broken wiring or connector.

135

Short circuit on the power supply of the emergency oil pressure sensor circuit

Does not affect performance. No engine oil pressure protection.

- Broken wiring or connector.

- Short to power supply of the signal wire.

141

Short circuit on a chain of low voltage of a chain of the sensor of emergency oil pressure

Does not affect performance. No engine oil pressure protection

- Broken signal wire or short to ground in the wiring of the motor or sensor.

- Open or short circuit to ground in the power wire.

143

oil pressure below normal

Decreased engine power oil pressure

144

Short circuit on power supply of a chain of the sensor of temperature of a cooling liquid

White smoke possible.

The fan remains on if controlled by the ECU.

There is no engine coolant temperature protection.

- Broken wiring or connector.

- Broken signal wire or short circuit to power supply.

145

Short circuit on a chain of low voltage of a chain of the sensor of temperature of a cooling liquid

White smoke possible.

The fan remains on if controlled by the ECU.

There is no engine coolant temperature protection.

Coolant temperature

146

Coolant temperature is higher than normal

Decrease in power.

It is possible to stop the motor if the protective stop is permitted.

Coolant temperature

151

Engine coolant temperature signal indicates that the engine coolant temperature is above the critical engine protection limit

Sequential power reduction depending on the alarm activation time.

If the protective stop is allowed, the engine will be turned off 30 seconds after the "STOP" indicator flashes.

Coolant temperature

153

Short circuit on the power supply of the intake manifold temperature sensor circuit

White smoke possible.

The fan remains on if controlled by the ECU.

There is no engine air temperature protection in the intake manifold.

- Broken wiring or connector.

- Broken signal wire or short circuit to power supply.

154

Short circuit on a chain of low voltage of a chain of the sensor of temperature of air in the intake manifold

White smoke possible. The fan remains on if controlled by the ECU.

There is no engine air temperature protection in the intake manifold.

- Shorting the signal wire to ground.

- The signal wire is shorted to ground.

155

Intake manifold air temperature sensor signal indicates air temperature rise above critical engine protection limit

Sequential power reduction depending on the alarm activation time.

If Safe Stop is enabled, the motor will be

is muffled after 30 seconds after the "STOP" indicator blinking.

- Increased resistance in the charge air intercooler.

- Too small charge air intercooler.

- High temperature at the outlet of the compressor.

175

Short circuit on the power supply of a chain of an electric motor of a drive of a throttle valve

Throttle motor not working

- Open or short circuit in the power supply of the electric motor wiring.

- Electronic control unit.

176

Short circuit on a chain of low voltage of a chain of an electric motor of a drive of a butterfly valve

Throttle motor not working

- Short to ground in the motor wiring.

- Electronic control unit.

177

Throttle motor locked in open position

Throttle motor not working

- throttle position sensor.

- the throttle valve is blocked.

187

Short circuit on a low voltage circuit of a chain No. 2 of a supply of sensors

Decrease in power

- Short circuit to ground of the power supply circuit.

- Power supply of the electronic control unit.

191

Short to ground when the air conditioner is turned on

The air conditioner does not turn on

Wiring and connectors

195

Short circuit on power supply of a chain of the sensor of level of a coolant

Does not affect work

- Broken wiring or connector.

- Shorting the signal wire to power.

- Shorting the power wire to power.

196

Short circuit on a chain of low voltage of a chain of the sensor of level of a coolant

Does not affect work

- Broken wiring or connector.

- Shorting the signal wire to ground.

- The sensor is damaged.

197

Low coolant level detected

Does not affect work

Coolant level

212

Short circuit on the power supply of the engine oil temperature sensor circuit

No engine protection by engine oil temperature

- Broken wiring or connector.

- Broken signal wire or short to power.

213

Short circuit on a low voltage circuit of the engine oil temperature sensor

No engine protection by engine oil temperature

- Shorting the signal wire to ground.

- Shorting the signal wire to the ground wire.

214

Engine oil temperature sensor signal indicates that the oil temperature is above the critical engine protection limit

Sequential power reduction depending on the alarm time. If the protective stop is allowed, the engine will be turned off 30 seconds after the "STOP" indicator flashes.

Engine oil temperature

221

Short circuit on power supply of a chain of the sensor of atmospheric pressure

Decrease in power

- Open circuit ground (wire, connector or sensor).

- The signal wire is shorted to power.

221

Short circuit on a chain of low voltage of a chain of the sensor of atmospheric pressure

Decrease in power

- Broken ground wire in harness, connectors, or sensor.

- The signal wire is shorted to power.

227

Short circuit on power supply of a chain 2 of power supply of sensors

Decrease in power

Short to power

234

Engine speed sensor signal indicates engine overspeed above critical engine protection limit

Cutting off the fuel supply until the engine speed drops to normal

- Fuel enters the air duct.

- Reverse cranking of the engine.

- crankshaft position sensor.

238

Short circuit on a low voltage circuit of a chain No. 3 of a supply of sensors

Difficulty starting and uneven operation possible

Short to ground

239

Short circuit on the power supply of the circuit No. 3 of the sensors power supply

Decrease in power

Short circuit to power

241

No signal from vehicle speed sensor

The engine speed does not exceed the maximum value. Engine speed excluding speed sensor.

Cruise control, underdrive safety, and cruise control will not function.

vehicle speed sensor

242

Intermittent or distorted signal

The engine speed does not exceed the maximum value.

Engine speed excluding speed sensor.

Cruise control, safety downshift, and cruise control will not function.

vehicle speed sensor

245

Short circuit on a chain of low voltage of a chain of the electric motor of the fan

The fan will be constantly on or will not work

Short to ground

249

Short circuit on the power supply of the outside air temperature sensor circuit

Does not affect work

- Broken ground wire in harness, connectors, or sensor.

- Open or short to power supply of the signal wire.

252

Intermittent signal from the engine oil level sensor

engine oil level sensor does not work

- Open or low voltage in the power circuit.

- Broken ground wire.

- Open or short circuit of the signal wire.

- engine oil level sensor.

253

Very low oil level received from engine oil level sensor

Power reduction possible.

The oil pressure may drop and the engine could be seriously damaged.

- Low engine oil level after changing it.

- Engine oil leaks to the ground.

- Engine oil leaks into the fuel or cooling system.

- High oil consumption.

254

Short circuit on a chain of low voltage of a chain of a solenoid valve of a cutoff of supply of fuel

The fuel shut-off solenoid valve is closed and the engine is shut off.

- Short circuit to ground.

- Solenoid valve for fuel cut-off

255

Short circuit on power or open circuit of the solenoid valve for cutting off the fuel supply

The fuel cutoff solenoid valve may not open when the ignition is turned on or close when turned off

- Open circuit.

- Shorting the signal wire to power.

- Solenoid valve for fuel cut-off.

256

Short circuit on a chain of low voltage of a chain of the sensor of temperature of outside air

Does not affect work

- Short to ground of the signal wire.

- Short to ground wire or signal wire ground.

257

Fuel cutoff solenoid valve stuck open or leaking

Reduced power, the engine can run for a short time when the key is turned to the "OFF" position.

- Calibration of the electronic control unit.

- Excess wire in the fuel cutoff solenoid valve circuit.

269

An attempt to start the engine without the permission of the anti-theft system will not start the engine

Immobilizer is not disabled

271

Short circuit on a chain of low voltage of a chain of the solenoid valve of a control of a supply of a fuel

the engine will not idle well. Decreased engine power. fuel pressure will be higher than specified.

Short to ground

272

Short circuit on power or open circuit of the solenoid valve for fuel control

the engine will not run or it will run poorly

Short to power

281

Pump imbalance between the high pressure pump plungers

the engine will not start or the power may decrease

TNVd

285

The electronic control unit receives the signal from the Multiplex bus too late or does not receive it at all

One or more devices connected to the Multiplex bus are not working properly

Multiplex SAE J19З9 bus

286

The electronic control unit receives only part of the information it needs from devices connected to the Multiplex bus

At least one device connected to the Multiplex bus is not working properly

Multiplex SAE J19З9 bus

287

The electronic control unit has detected a malfunction with the accelerator pedal

the engine is only idling or not running at full throttle

Multiplex SAE J19З9 bus

288

The electronic control unit has detected a malfunction with the remote control accelerator pedal

the engine does not respond to the remote pedal. the engine only runs at idle speed. Only the accelerator pedal in the cab can be used.

Multiplex SAE J19З9 bus

291

The anti-theft system cannot work properly. the engine may not start.

The anti-theft system cannot work properly. the engine may not start.

- Electronic control unit.

- Multiplex SAE J1939 tire.

- Immobilizer.

295

The electronic control unit recorded an error in the atmospheric pressure sensor signal

Decrease in power

- The sensor readings are fixed in the same range.

- High resistance in the sensor circuit.

311

After turning off the ignition, a high current is detected in the injector circuit No. 1

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open circuit in harness, connectors or actuator.

- A short to ground in the wiring of the engine or injector.

- Short to power supply of the motor wiring.

- Low or high injector resistance.

313

After turning off the ignition, a high current was detected in the injector circuit No. 3

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open circuit in harness, connectors or actuator.

- A short to ground in the wiring of the engine or injector.

- Short to power supply of the motor wiring.

- Low or high injector resistance.

315

After turning off the ignition, a high current was detected in the injector circuit No. 2

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open circuit in harness, connectors or actuator.

- A short to ground in the wiring of the engine or injector.

- Short to power supply of the motor wiring.

- Low or high resistance nozzles.

319

No power supply for real time clock

It does not affect the operation, the data in the electronic control unit does not contain the exact time and date.

- Battery backup.

- Wiring and connectors.

321

After turning off the ignition, a high current was detected in the injector circuit No. 4

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open circuit in harness, connectors or actuator.

- A short to ground in the wiring of the engine or injector.

- Short to power supply of the motor wiring.

- Low or high resistance

322

Injector # 1 circuit detects current after power outage.

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open circuit in the wiring of the engine or injector winding.

- High resistance of the injector winding.

- Very low winding resistance

injectors (internal short circuit of the injector, but not to ground).

- Error or damage to the electronic control unit.

324

Injector 3 circuit detected current after voltage cut-off.

The injector is powered off.

Engine misfiring or engine running unevenly

- Open in engine wiring or injector winding.

- High resistance of the injector winding.

- Very low winding resistance

injectors (internal short circuit of the injector, but not to ground).

- Error or damage to the electronic control unit.

331

Injector 2 circuit detected current after voltage cut-off.

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open in engine wiring or injector winding.

- High resistance of the injector winding.

- Very low resistance of the injector winding (internal short circuit of the injector, but not to ground).

- Error or damage to the electronic control unit.

332

Injector 4 current detected after voltage cut-off

The injector is powered off.

Engine misfiring or engine running unevenly.

- Open in engine wiring or injector winding.

- High resistance of the injector winding.

- Very low winding resistance

injectors (internal short circuit of the injector, but not to ground).

- Error or damage to the electronic control unit.

334

The coolant temperature sensor signal does not change when the engine is running

The electronic control unit approximately calculates the temperature of the coolant

- The sensor readings are fixed in the same range.

- High resistance in the sensor circuit.

343

Electronic control unit power supply error detected

Possible slight change in performance, engine stalls, or engine starting difficult. Fault information, trip computer data, or maintenance data may be incorrect.

Electronic control unit

346

Incorrect configurations of adjustable parameters of key settings are detected by the electronic control unit

Various additional switched inputs of the electronic control unit may not work correctly

Electronic control unit memory software

351

The electronic control unit has detected a low boost voltage of the injector

Potential smoke, low power, misfiring, or engine will not start

- Calibration of the electronic control unit.

- Power injector.

352

Short circuit on the low voltage circuit of the circuit No. 1 of the power supply of the sensors

Decrease in power

Short to ground

356

Short circuit on power supply or open circuit of the air flow sensor

Possible decrease in engine operating parameters

- air flow sensor.

- Electronic control unit.

- Open circuit ground.

- Short to power supply of the signal wire.

- Intermittent malfunction.

357

Short circuit on low voltage circuit or open circuit of the air flow sensor

Possible decrease in engine operating parameters

- air flow sensor.

- Electronic control unit.

- Broken power wire or short to ground.

- Broken signal wire or short to ground.

- Intermittent malfunction.

358

Air flow sensor signal does not match engine operation

Possible decrease in engine operating parameters

- air flow sensor.

- Dirty air flow sensor.

- Dirty air filter.

- Wiring and connectors.

- Leaks in the intake system.

386

Short circuit on the power supply of the circuit No. 1 of the sensors power supply

Decrease in power

Short to power

415

Oil pressure signal indicates that the oil pressure has dropped below the critical engine protection threshold

Sequential power reduction depending on the alarm activation time.

If the safety stop is enabled, the engine will be turned off 30 seconds after the STOP indicator flashes.

- Low oil pressure.

- Low oil level.

- emergency oil pressure sensor.

- Shorting the wiring to ground.

418

Determined the presence of water in the fuel filter

Possibly reduced power or difficult starting

Water in the fuel filter

425

Signal not specified, intermittent or incorrect

Does not affect performance. the engine oil temperature data is incorrect.

- engine oil temperature sensor.

- High resistance in the sensor circuit.

427

Lost communication between the electronic control unit and other devices via the SAE J19З9 data channel

The engine speed will gradually decrease and remain at idle

- Data channel SAE J19З9.

- Electronic control unit.

- External control unit for vehicle accessories.

428

Short circuit on power supply of a chain of the sensor of presence of water in the fuel filter

Does not affect performance. The indicator of water in the fuel filter does not work

- Broken ground wire or signal wire in harness, connectors, or sensor.

- The signal wire is shorted to power.

429

Short circuit on a chain of low voltage of the sensor of presence of water in the fuel filter

Does not affect performance.

The indicator of water in the fuel filter does not work

A short to ground in the signal wire in the wiring, sensor, or connector

435

engine oil pressure sensor data is invalid when the ignition is turned on

Does not affect performance.

Engine oil pressure protection does not work.

- emergency oil pressure sensor.

- Broken signal wire of the emergency oil pressure sensor.

- Electronic control unit.

- Shorting the signal wire to power.

436

intake manifold air temperature sensor data is invalid when the ignition is turned on or the engine is running

The electronic control unit approximately calculates the air temperature in the intake manifold

- The sensor readings are fixed in the same range.

- High resistance in the sensor circuit.

441

Power supply of the electronic control unit is below the minimum level

the engine may stall or be difficult to start

- Accumulator battery.

- Wiring and connectors.

442

Power supply of the electronic control unit is above the maximum level

All electrical components may be damaged.

- Generator voltage regulator (overcharge).

- The batteries are connected in series, not in parallel.

- Incorrect starting procedure with the booster battery.

449

Electronic block

the control has determined that the pressure in the fuel accumulator is higher than the normal fuel pressure

Does not affect or may cause noise associated with increased injection pressure (especially at idle or under light load) or a decrease in power is possible

Increased resistance in the drain line

451

Short circuit on power supply of a chain of the sensor of pressure of fuel

Power or speed reduced

- Shorting the power wire to the signal wire.

- Broken signal wire.

- Broken power wire at 5 V.

- Broken ground wire.

- fuel pressure sensor.

- Electronic control unit.

452

Short circuit on a chain of low voltage of a chain of the sensor of pressure of fuel

Power or speed reduced

- The power or signal wire is shorted to ground.

- Some component connected to the common supply wire is shorted to ground.

- fuel pressure sensor.

- Electronic control unit.

465

Short circuit on the power supply of a circuit of the bypass valve of the turbocharger 1

Decrease in engine speed

- A short to power supply.

- Open circuit in the turbocharger bypass valve.

466

Short circuit on weight of a chain of the bypass valve of a turbocharger 1

Decrease in engine speed

Shorting the signal wire to ground

471

the engine oil level sensor has detected a low engine oil level

the engine could be damaged. A drop in oil pressure and serious engine damage can occur.

- Low engine oil level after changing it.

- Engine oil leaks to the ground.

- Engine oil leaks into the fuel or cooling system.

- High oil consumption.

477

Emission control fluid injection controller power supply is below system supply voltage

Disabling the injection of the toxicity reduction system fluid into the system

- Incorrect INSITE battery voltage settings.

- Generator.

- Accumulator battery.

478

Emission control fluid injection controller power supply is higher than system supply voltage

Disabling the injection of the toxicity reduction system fluid into the system

Incorrect INSITE battery voltage settings

491

Short circuit on the power supply of the bypass valve circuit of the turbocharger 2

Decrease in engine speed

- A short to power supply.

- Open circuit in the turbocharger bypass valve.

492

Short circuit on weight of a turbocharger 2 bypass valve circuit

Decrease in engine speed

Short to ground

498

Short circuit on the power supply of the engine oil level sensor circuit. An internal error has been detected in the engine oil level sensor.

engine oil level sensor disabled

- Broken ground wire in harness, connectors, or sensor.

- The signal wire is shorted to power.

- Shorting the power wire to power

499

Short circuit on the low voltage circuit of the engine oil level sensor circuit. An internal error has been detected in the engine oil level sensor.

engine oil level sensor disabled

- Open or short circuit in the oil level sensor circuit.

- oil level sensor.

545

The reading of the pressure sensor in the intake manifold exceeds the maximum limit for this mode of engine operation

Decrease in power

- Turbine bypass control valve.

- Turbocharger.

- Fuel system or turbocharging system.

553

The electronic control unit has determined that the pressure in the fuel accumulator is higher than the specified

Does not affect or may cause noise associated with increased injection pressure (especially at idle speed or under light load). Decrease in power.

High fuel pressure

554

The electronic control unit has determined that the fuel pressure sensor signal does not change

The electronic control unit approximately calculates the fuel pressure, power reduction

- boost pressure sensor and air temperature sensor assembly.

- camshaft position sensor.

- fuel pressure sensor.

- atmospheric pressure sensor.

555

Crankcase ventilation filter needs service

Does not affect work

- The crankcase ventilation filter needs to be replaced.

- crankcase pressure sensor.

- Clogged or narrowed crankcase ventilation separator breather.

- Clogged or narrowed breather, drain pipe or crankcase ventilation check valve.

- The outlet pipe of the crankcase ventilation system is clogged or narrowed.

- The crankcase ventilation pipe is frozen, blocked or narrowed.

556

Crankcase ventilation filter needs service

Does not affect work

- The crankcase ventilation filter needs to be replaced.

- crankcase pressure sensor.

- Clogged or narrowed crankcase ventilation separator breather.

- Clogged or narrowed breather, drain pipe or crankcase ventilation check valve.

- The outlet pipe of the crankcase ventilation system is clogged or narrowed.

- The crankcase ventilation pipe is frozen, blocked or narrowed.

559

The electronic control unit has determined that the pressure in the fuel accumulator is below the specified

Difficulty starting or power reduction possible, motor

The atelier may not start.

Low fuel pressure

584

Short circuit to power or open circuit of the starter blocking relay

the engine will not start or the starter protection against accidental starting is disabled

- Broken wiring or connector.

- A short to power supply.

585

Short circuit on a chain of low voltage of a chain of a relay of blocking of a starter

Disabled starter protection against accidental starting

Short to ground

596

High battery voltage detected when checking battery voltage

High voltage will illuminate orange warning and CHECK ENGINE indicator

Overcharge due to faulty alternator or battery

597

Low battery voltage detected when checking battery voltage

When voltage is low, the orange CHECK ENGINE warning indicator will be lit

- Overcharge due to faulty alternator or battery.

- Consumers of high amperage electricity (radio amplifier, side lights, etc.).

598

Very low battery voltage detected when checking battery voltage

When the voltage is very low, the red STOP ENGINE warning light will be on

Overcharge due to faulty alternator or battery

649

Engine oil and filter change times

Maintenance reminder only

Engine oil and filter change times

Continuation of the Cummins ISF3.8 DTCs table in the article - Continuation of the Cummins ISF3.8 DTCs table