Doosan DX140 adblue fault: Causes
Description of the current situation on this Doosan shovel
The 1204F Perkins/CAT engine meets Tier 4F emission standards. It is therefore DOC/SCR/EGR compliant. We have various messages about the SCR system on the shovel: audible warning, torque and power reduction...
After creating a complete machine report, we can understand the faults present. There are inactive faults (which become present again after use), and other faults which are always present even after switching off the ignition: those of torque restriction and motor performance.
Adblue Doosan DX140 fault description
ACTIVE DEFECTS
Active" and "Logged" refer to the current or logged status of codes. Active Event Codes" and "Active Diagnostic Codes" describe codes that are currently active or present in the equipment. Logged Event Codes" and "Logged Diagnostic Codes" describe codes that have been logged in the past, but may no longer be active.
- Code J3516-18 indicates that there is a problem with a low to moderate concentration of DEF (diesel exhaust fluid, Adblue) in SCR system #1. The severity of this problem is described as grade 2 on a severity scale of 1 to 3.
- Code J5246-0 indicates a problem with the system's selective catalytic reduction (SCR) equipment, with a severity level of severity 3 on a scale of 1 to 3.
- Code J5246-15 indicates a problem with the selective catalytic reduction (SCR) equipment, with a severity level of severity (1) on a scale of 1 to 3.
- Code J5246-16 indicates a problem with the selective catalytic reduction (SCR) equipment, with a degree of severity of moderate severity (2) on a scale of 1 to 3.
The operation inducement severity indicates, as described above, the severity of the event. When this message is present, machine performance is reduced to the point where, in the worst-case scenario, the vehicle cannot be used at all.
INACTIVE DEFECTS
- Defect code J5246-0 indicates a problem with selective catalytic reduction (SCR) equipment, with a severity level of 3 on a scale of 1 to 3. It is reported 2 times.
- Fault codes J1761-17 and J1761-18 indicate a problem with the adblue volume, with the least serious degree of severity (1) and (2) on a scale of 1 to 3. Reported several times.
- Code J5392-31 indicates a defuzzing problem in the DEF dosing unit. It is reported 17 times. Loss of prime means that the DEF metering unit in the SCR system (the pump or injector) is unable to maintain the pressure required to inject DEF (Adblue) correctly into the exhaust system. This may be caused by a leak in the metering unit or a lack of DEF fluid in the tank, or by a faulty pump or injector.
- Code J1761- 1 indicates that there is a problem with the DEF (diesel exhaust fluid) tank volume of aftertreatment #1, with the most serious degree of severity (3) on a scale of 1 to 3. It is reported 3 times.
How can we solve the problem once and for all?
As a programming engineer, I'm proposing a solution to the problems associated with AdBlue and EGR in diesel engines. This solution consists of using programming and SW flash to completely eliminate the use of these anti-pollution systems. To begin with, I use a diagnostic tool to read the engine control data. Using this data, I locate the AdBlue and EGR parameters in the memory. I then use programming software to modify them. With this method, I completely deactivate the use of AdBlue and EGR. The engine will no longer depend on these systems to operate. This will prevent faults related to these systems and reduce vehicle maintenance costs.
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