To solve these problems, we propose to permanently remove the Adblue, the FAP and the EGR. This procedure eliminates all faults and warning lights on the dashboard. You'll no longer need to add adblue, guaranteeing trouble-free operation with no warning lights.
By modifying the data in the CM2350 ECU, we integrate new parameters for the Komatsu SAA6D engine (Cummins QSB 6.7 engine). This enables precise adaptation to new operating conditions, improving overall vehicle reliability.
Common CM2350 ECU faults encountered on machines
| Code | Description EN | Technical evaluation |
|---|---|---|
| 0373 | Line heater DEF - Relay inoperative or out of tolerance | High probability of failure of control relay or DEF heating line element. Possibility of open resistor or mechanically blocked relay. |
| 3713 | Heating line DEF n°2 - Excessive voltage | The fault suggests a short-circuit to the voltage source or an abnormal power supply to the circuit. Check wiring and sensor integrity. |
| 0375 | Pressure sensor DEF - Voltage too low | High probability of line break, ground short or faulty internal sensor. Multimeter check recommended. |
| 0376 | Pressure sensor DEF - Voltage too high | Fault often caused by a short-circuit to the positive source. Check circuit continuity and polarity. |
| 0378 | Dosing unit temperature DEF - Inconsistent value | Possibility of faulty internal thermal sensor, signal outside expected range. Cross-analysis with ambient temperature and physical measurements recommended. |
| 0380 | Dosing unit DEF - Erratic data | Fault linked to unstable or noisy sensor data, which may indicate a hardware failure in the unit or a CAN communication problem. |
| 0381 | Level sensor DEF n°1 - Voltage too low | Usually indicates loss of signal due to damaged wiring or sensor failure. Check circuit resistance. |
| 0382 | Level sensor DEF n°1 - Voltage too high | Typical fault: short-circuit to +Vbat or sensor out of specification. Signal line monitoring recommended. |
| 0384 | Level DEF - Valid data but below normal range | Fault often indicative of an actual low level. If the tank is full, suspect a sensor reading error. |
| 0385 | Low DEF level - Level 1 alert | Fluid level close to low limit. Monitor sensor behavior if warning persists after filling. |
| 0387 | Low DEF level - Critical alert (level 2) | High probability of empty tank or sensor failure. Engine lock-up possible depending on SCR strategies. |
| 0388 | DEF temperature sensor - Irregular update frequency | Possible communication fault between sensor and ECU. Problem may be hardware or CAN bus related. |
| 0389 | DEF quality sensor - Irregular update frequency | Typical fault of an aging or disconnected sensor. Checking CAN line, power supply and module integrity recommended. |
| 0390 | SCR temperature sensor - Irregular update frequency | May indicate sensor failure or excessive communication delay. Check harness and sensor integrity. |
| 0391 | SCR n°1 temperature sensor - Irregular update frequency | Same analysis as 0390. CAN traffic monitoring and oscilloscope sensor testing can be useful. |
| 0392 | DEF n°1 quality sensor - Irregular update frequency | Fault similar to 0389. May result from intermittent power loss, floating ground or software drift. |
These faults can lead to major malfunctions if not dealt with quickly. By removing emission control devices, the overall reliability of the system can be improved by eliminating these potential sources of error. In conclusion, an accurate diagnosis combined with appropriate engine reprogramming can offer a lasting solution to recurring emission control system problems.
AdBlue failure on Bull Komatsu: Reprogramming and AdBlue removal process on Komatsu PXi
In the event of AdBlue failure on a Bull Komatsu, engine reprogramming represents a reliable and durable technical solution. Our intervention follows a rigorous protocol, specifically adapted to machines equipped with CM2350 systems.
📍 Process steps :
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Comprehensive electronic diagnostics
We start with an in-depth analysis of emission-related faults. This includes identifying active faults on the CM2350 and ACM ECUs, as well as anomalies in CANBUS communications. -
Reading and saving the CM2350 ECU
The ECU configuration is read via flash extraction, guaranteeing an accurate copy of the internal memory in the format.xcal.
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Modification of binary data
Operating values are adjusted in order to :-
Remove AdBlue and DPF error codes (hard-coded)
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Neutralize recurring alerts
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Emulating the operation of the particulate filter and the soot rate
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Disable AdBlue injection safely
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Writing the modified file
Once the new data has been validated, it is written to the ECU, with checksums recalculated to ensure software integrity. -
Additional adjustments
If necessary, certain modules (notably the DEF module or SCR extensions) are deactivated to ensure perfect compatibility with the new configuration.
Discover our other Komatsu projects
Are you experiencing an AdBlue failure or an emission control system malfunction on a Komatsu machine? Visit our page dedicated to all our interventions on Komatsu machines to find out more about the solutions we offer: AdBlue suppression, DPF, EGR, NOx sensor neutralization and performance restoration.
If your machine is powered by a Cummins engine (QSB, QSL, ISB...), whether on a Komatsu or another brand (Liebherr, Case, Terex, etc.), you can also consult our page dedicated to Cummins engines.
Are you an engine reprogramming professional?
We also offer ready-to-use File Services solutions! Visit our File Services platform for professionals to order your AdBlue, DPF, EGR and much more directly, with fast, precise processing.
