Diagnostics of the COMMON RAIL System
If a malfunction occurs during operation of the bus (the diagnostic lamp of the "COMMON RAIL" system lights up or flashes), it is necessary to diagnose the "COMMON RAIL" system using the diagnostic lamp and diagnostic key and eliminate the identified malfunctions.
Note: Flashing of the diagnostic lamp indicates the occurrence of a more serious malfunction than intermittent lighting.
Procedure for Reading Blink Codes
To diagnose, press the diagnostic key and hold it for more than 2 seconds.
After releasing the key, the diagnostic lamp will "blink" the three-digit blink code of the engine malfunction in the form of flashes. It will look like this:
- After releasing the diagnostic key — pause
- A series of flashes (e.g., two flashes = number 2)
- Pause
- A series of flashes (e.g., four flashes = number 4)
- Pause
- A series of flashes (e.g., three flashes = number 3)
As a result, we have the fault code blink code 243 (Oil pressure sensor).
The next time you press the diagnostic key, the diagnostic lamp will "blink" the blink code of the next fault. Thus, all faults recorded by the electronic unit are displayed; after outputting the last detected fault, the unit begins to display the first fault again.
For deciphering the blink codes of faults, see the table below.
Deleting Errors from the Control Unit Memory
Remedy the fault in the manner indicated in the table and delete the fault record in the control unit memory as follows:
- Turn off the ignition and pause for one minute.
- Press the diagnostic key and, holding it, turn on the ignition.
- Hold the diagnostic key pressed for 5–7 seconds after turning on the ignition.
Verifying fault elimination: To make sure the problem has been resolved, take a test drive. During this trip, the self-diagnosis checks the system and again stores information about a possible remaining fault. After a test drive, re-read the diagnostic fault codes from the control unit memory. The error memory should now be cleared, indicating successful completion of the repair.
Important! If not all the faults displayed by the diagnostic system of the control unit have been eliminated, you need to proceed to the diagnostic station even if the fault that has arisen does not significantly affect the operation of the diesel engine, since the present fault can radically affect the deterioration of the environmental performance of the engine.
Note: Regarding the recognition of faults, the codes of which were detected by the lighting of the diagnostic lamp, or were in the memory of the electronic control unit and their codes were identified by a complete system diagnosis, but are not reflected in the table below, you must contact a specialized service center.
Engine Diagnostic Blink Code Table
Important! Not all faults that occur can be recorded in the memory of the control unit. Therefore, while the diesel engine is running, monitor the instrument readings, the color of the exhaust gases, and listen to the operation of the diesel engine. If abnormal noises appear, stop the diesel engine, identify the cause of the malfunction and eliminate it. If the fault cannot be resolved, proceed to the service station diagnostics station. Electronic information from the service station database supports further troubleshooting and provides instructions for troubleshooting.
Faults indicated by turning on the diagnostic lamp
| Blink Code | P-Code | Fault Type | Description of Malfunction | Method of Troubleshooting |
|---|---|---|---|---|
| 1-1-1 | P060V | The reference voltage of the analog-to-digital converter is above the specified limit | Error detected by the A/D converter monitoring function | - |
| 1-1-2 | P0335, P0336 | Malfunction in the crankshaft speed sensor circuit | No signal or incorrect signal from the crankshaft speed sensor | Check the condition and connection of the crankshaft speed sensor |
| 1-1-3 | P0340, P0341 | Fault in the camshaft speed sensor circuit | No signal or incorrect camshaft speed sensor signal | Check the condition and connection of the camshaft speed sensor |
| 1-1-4 | P0016 | Mismatch between the signals of the crankshaft and camshaft speed sensors | Mismatch between the signals of the crankshaft and camshaft speed sensors | Check the condition and connection of the camshaft and crankshaft speed sensors |
| 1-1-5 | P0607 | Deviation between the time of the electronic time processor and the central processor timer | Error in the operation of the electronic time processor | - |
| 1-1-6 | P1616, P1617, P1618 | The cylinder shutdown path using the Watchdog module is faulty | A malfunction detected during block initialization | - |
| 1-2-1 | P0616, P0617, P1638, P1639 | Malfunction in the power stage circuit of the starter relay control | Short circuit to battery/ground, no load resistance | Check the condition and connection of the starter relay |
| 1-2-2 | P2530 | Fault in terminal 50 circuit | Terminal 50 is always closed | Check the condition and connection of terminal 50 |
| 1-2-3 | P2533 | Fault in terminal 15 circuit | No signal from terminal 15 | Check the condition and connection of terminal 15 |
| 1-2-4 | P0563, P0562 | Invalid battery voltage | Voltage above or below the specified limit | Check status and connection of the battery |
| 1-2-5 | P1007 | Implausible appearance of the field | The FMTC_trq2qBas_MAP field contains non-strictly monotonic curves | - |
| 1-3-1 | P0643, P0642, P0653, P0652, P0699, P0698, P1640, P1641 | Faulty supply voltage to sensors 1, 2, 3, and 12V sensor | Voltage above or below the specified limit | Check sensor supply circuits |
| 1-3-2 | P0687, P0686, P160, P160F | Malfunction in the main relay circuit (control unit) | Short circuit to battery or ground | Check the condition and connection of the main relay |
| 1-3-3 | P0193, P0192, P0191 | Malfunction in the rail fuel pressure sensor circuit | Voltage above/below limit, signal displacement | Check the condition and connection of the fuel pressure sensor in the rail |
| 1-3-4 | P100F, P1010 | Malfunction of the fuel pressure safety valve in the rail | Safety valve detected as open or did not open after pressure surge | Check the condition and connections of the high and low pressure hydraulic circuits |
| 1-3-5 | P0251, P0252, P0254, P0253, P025D, P025C | Malfunction in the circuit of the power stage of the high-pressure fuel pump dispenser | Open circuit, short circuit, temperature exceeded | Check the condition and connection of the high pressure fuel pump metering |
| 1-3-6 | P1011, P1012, P1013 | Malfunction of the fuel pressure safety valve in the rail | Number of openings/exceeded allowed limits | Check the condition and connections of the high and low pressure hydraulic circuits |
| 1-4-1 – 1-4-4 | P0262–P0272, P1213–P121E, P0201–P0204 | Malfunction in the power stage control circuit of cylinders 1–4 | Short circuit, specific error, engine stop | Check the condition of the plugs and cable connecting the engine cylinder injectors |
| 1-5-1 – 1-5-2 | P1203–P1212 | Malfunction in the power stage circuit for controlling Bank1/Bank2 injectors | Short circuit, open circuit, unclassifiable error | Check the condition of the plugs and cable connecting the engine cylinder injectors |
| 1-5-3 | P062B | Failure of the power stage chip for injector control ChipA/ChipB | Internal reset, initialization error, communication loss | - |
| 1-5-4 | P1225 | The number of working cylinders is less than the specified minimum limit | Engine stops | Check the condition of the plugs and cable connecting the engine cylinder injectors |
| 1-5-5 | P1300, P1301, P1302 | Limiting the number of fuel injections | Load balance or software settings limitation | You can continue moving |
| 2-1-1 | P2269 | Concentration of water in the fuel above permissible level | Water in fuel | Replace fuel |
| 2-1-2 | P1018 | Fine fuel filter clogged | Clogged fine fuel filter | Replace the fine fuel filter |
| 2-1-3 | P1015, P1016, P1017 | Malfunction in the fine fuel filter clogging sensor circuit | Voltage above/below limit, implausible signal | Check the condition and connection of the sensor |
| 2-1-6 | P1008, P1009 | Fault in the fuel filter electric heating element circuit | Short circuit to battery or ground | Check the condition and connection of the electric heating element |
| 2-2-1 | P0123, P0122, P2135, P0223, P0222 | Faulty gas pedal position sensor 1 or 2 | Voltage above/below limit, plausibility broken | Check the condition and connection of the gas pedal position sensors |
| 2-2-2 | P0704 | Error detected by the clutch status signal diagnostic function | Defective clutch status signal via CAN, invalid sensor signal | Check the condition and connection of the clutch pedal position sensor. Check the connection of the CAN line |
| 2-2-3 | P0571, P0504 | Fault in the brake pedal sensor circuit | Defective or implausible brake pedal sensor signal | Check the condition and connection of the brake pedal position sensor |
| 2-2-5 | P2299 | Gas pedal signal is not plausible | Error recorded by the plausibility check of gas pedal and brake pedal | Check the condition and connection of the gas and brake pedal position sensors |
| 2-2-6 | P0219 | Maximum permissible crankshaft rotation speed exceeded | Overspeed | If due to incorrect shifting — continue driving. If spontaneous — do not start the engine! |
| 2-2-8 | P0856 | Operation error of the Torque Control System unit | Physical implausibility of the request | Check the condition and connection of the Torque Control System unit. Check CAN line connection |
| 2-3-1 | P0238, P0237, P0235, P0236 | Malfunction in the boost pressure sensor circuit | Voltage above/below limit, implausible signal | Check the condition and connection of the boost pressure sensor |
| 2-3-2 | P2229, P2228, P2227 | Malfunction in the atmospheric pressure sensor circuit | Voltage above/below limit, plausibility broken | Check the condition and connection of the sensor |
| 2-3-3 | P0098, P0097, P0099 | Malfunction in the air temperature sensor circuit | Voltage above/below limit, defective CAN signal | Check the condition and connection of the air temperature sensor |
| 2-3-5 | P0073, P0072 | Malfunction in the ambient temperature sensor circuit | Voltage above/below physical limit | Check the condition and connection of the ambient temperature sensor |
| 2-4-1 | P0118, P0117, P0115, P0116 | Malfunction in the coolant temperature sensor circuit | Voltage above/below limit, implausibility | Check the condition and connection of the coolant temperature sensor |
| 2-4-2 | P163A | Coolant overheating | Coolant temperature is higher than the maximum permissible | Check the cooling system |
| 2-4-3 | P0523, P0522, P0520, P0521, P0524 | Malfunction in the oil pressure sensor circuit | Voltage above/below limit, implausible signal, pressure too high/low | Check the condition and connection of the oil pressure sensor |
| 2-4-4 | P0198, P0197, P0195, P100D, P0196 | Malfunction in the oil temperature sensor circuit | Voltage above/below limit, implausibility, temperature too high | Check the condition and connection of the oil temperature sensor |
| 2-4-5 | P0116 | Error recorded by the plausibility check function of the coolant temperature sensor | Minimum coolant temperature not reached or increase not achieved | Check the condition and connection of the coolant temperature sensor |
| 2-5-1 – 2-5-8 | P1011, P1012, P1013, P0087, P0088, P101A, P1014, P1018, P1019, P101B | Violation of the high pressure fuel pump metering control mode | Fuel pressure deviation in the rail, implausible set point, pump flow issues | Check the condition and connections of the components of the high and low pressure hydraulic circuits |
| 2-6-1 | P0607 | Restart of the electronic unit | Restart recorded as protective or for hidden reasons | - |
| 2-6-2 | P1613, P1614 | Error recorded by the monitoring function of the electronic unit | Injector activation time exceeded, implausibility between engine speed calculations | - |
| 2-6-3 | P060A, P1607, P1608 | Communication disruption with power stages, voltage errors | Lost communication with CJ940 module, supply voltage errors | - |
| 2-6-4 | P060 | Implausible operation of the controller or Watchdog surveillance system | Communication monitoring between SU310 and controller | - |
| 2-6-5 | P062F | EEPROM failure | Error during last read/write operation, default value used | - |
| 3-1-1 | P0478, P0477, P0476 | Malfunction in the exhaust flap control power stage circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the exhaust flap |
| 3-1-3 | P0647, P0646, P0645 | Malfunction in the circuit of the power stage of the air conditioner control | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the air conditioner |
| 3-2-1 | P0542, P0541 | Malfunction in the air preheating power cascade circuit | Short circuit to battery or ground | Check the condition and connection of the air preheater |
| 3-2-2 | P0540 | Air preheating is always on | Defective multi signal | Check the condition and connection of the air preheater |
| 3-2-3 | P1020–P1023 | Error recorded by the air preheating check function | Battery voltage change above/below threshold when turning on/off | Check the condition and connection of the air preheater |
| 3-2-4 | P0501, P0500, P2158–P2160, P2157, P2159, P1511–P1513 | Vehicle speed measurement fault (paths 1, 2, 3) | Speed signal implausible, voltage above/below limit, defective frequency | Check condition and connection of speed sensor, tachograph, CAN devices |
| 3-2-5 | P0050, P004F, P0661, P0662 | Malfunction in the engine brake decompression throttle circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the engine brake decompression throttle |
| 3-2-6 | P0629, P0628, P0627, P062A | Malfunction in the electric fuel pre-priming pump circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the electric fuel pre-priming pump |
| 3-3-1 | P1619–P161C | Malfunction in the system diagnostic lamp circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the system diagnostic lamp |
| 3-3-3 | P0650 | Malfunction in the malfunction indicator lamp circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the malfunction indicator lamp |
| 3-3-4 | P162F, P1630–P1632 | Malfunction in the warning lamp circuit | Short circuit to battery/ground, no load resistance, temperature exceeded | Check the condition and connection of the warning lamp |
| 3-3-5 | P0649 | Fault in the variable speed limit lamp circuit | Short circuit to ground, no load resistance, temperature exceeded | Check the condition and connection of the lamp |
| 3-4-1 | P0564 | Malfunction in the cruise control actuator circuit | Inoperative switch combination | Check the condition and connection of the cruise control unit |
| 3-4-3 | P2530 | Malfunction in the backup engine control start button circuit | Button is stuck or constantly pressed | Check the condition and connection of the start button |
| 3-4-4 | P1000–P1002 | Faulty channel of the analog-to-digital converter for boost compressor regulator | Signal voltage above/below limit, defective signal | Check the condition and connection of the boost compressor regulator |
| 4-1-1 – 4-1-7 | U0029, U0038, U0047, U0113, U1101, U1114 | CAN bus errors | No CAN A, B, or C bus, message timeouts | Check the connection of the CAN line to other CAN devices |
| 4-2-1 – 4-2-5 | U1104–U1113 | TSC1 CAN message errors | Timeout for various TSC1 messages in torque/engine speed correction modes | Check the connection of the CAN line to other CAN devices |
| 4-3-1 | U0001 | Error sending CAN messages | Timeout for messages sent to CAN | Check the connection of the CAN line to other CAN devices |
| 4-3-4 – 4-3-5 | U0158, U1115 | CAN message errors | DashDsp, WSI CAN message timeout | Check the connection of the CAN line to other CAN devices |
| 4-4-1 – 4-4-6 | U0156, U0157, U0103, U0104 | Various CAN message errors | Timeout for EBC1, ERC1DR, ETC1, RxCCVS, TC01 CAN messages | Check the connection of the line to other CAN devices |
| 4-5-1 – 4-5-2 | U1102, U1103 | CAN message errors | Timeout for RxEngTemp2, TF CAN messages | Check the connection of the line to other CAN devices |
| 4-6-1 – 4-6-6 | U0434–U0439 | DM1DCU CAN message errors | SPN received matches SPN in blocks 1–5, timeout | Contact the service center |
| 5-1-1 – 5-3-1 | P0301–P0304, P0300 | Misfire control error in cylinders 1–4 and multi-cylinder | Number of detected flash misses above the specified limit | Check the condition of the plugs and cable connecting the engine cylinder injectors |
| 5-2-2 | P160C | High pressure circuit test | Rail pressure control functions deactivated during test | - |
