Adblue Doosan DX140 fault: Causes
Description of the current situation on this Doosan excavator
The Perkins/CAT 1204F engine meets Tier 4F emission standards. It therefore has DOC/SCR/EGR elements. We have different messages related to the SCR system on the excavator, sound alert, torque reduction and power…
After creating a complete report of the machine we can understand the faults present. There are inactive faults (which become present again after use), and other faults which are still present even after switching off the ignition: those of torque restriction and engine performance.
Description of faults adblue Doosan DX140
Description of faults adblue Doosan DX140
ACTIVE FAULTS
The terms “Active” and “Logged” refer to the current or logged state of the 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.
The J3516-18 code indicates that there is a low to moderate DEF (diesel exhaust fluid, Adblue) problem in the SCR #1 system. The severity of this problem is described as 2 on a severity scale of 1 to 3.
The J5246-0 code indicates that there is a problem with the system’s Selective Catalytic Reduction (SCR) equipment, with a severity level of 3 on a scale of 1 to 3.
The J5246-15 code indicates that there is a problem with the Selective Catalytic Reduction (SCR) equipment, with the least severe severity (1) on a scale of 1 to 3.
The J5246-16 code indicates that there is a problem with the Selective Catalytic Reduction (SCR) equipment, with a moderate severity level (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 then the performance of the machine is reduced up to, in the worst case, the totally impossible use of the vehicle.
INACTIVE FAULTS
The J5246-0 fault code indicates that there is a problem with the selective catalytic reduction (SCR) equipment, with a severity level of 3 on a scale of 1 to 3. It is reported 2 times.
The J1761-17 and J1761-18 fault codes indicate that there is 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 time.
The J5392-31 code indicates that there is an unpriming problem in the DEF dosing unit. It is reported 17 times. Loss of prime means that the DEF dosing unit in the SCR system (The pump or the injector) fails to maintain the pressure necessary to properly inject the DEF (Adblue) into the exhaust system. This can be caused by a leak in the dosing unit or a lack of DEF fluid in the tank, a faulty pump or injector.
Code J1761-1 indicates that there is a problem with the aftertreatment #1 diesel exhaust fluid (DEF) tank volume, with the most severe severity (3) on a scale of 1 to 3. It is reported 3 times.
How to solve the problem permanently?
As a programming engineer, I propose a solution to counter defects related to AdBlue and EGR in diesel engines. This solution is to use programming and SW flashing to completely eliminate the use of these emissions systems. To start, I use a diagnostic tool to read engine control data. Using this data, I locate the parameters related to AdBlue and EGR in the memory. Then I will use programming software to modify them. Thanks to this method, I completely disable the use of AdBlue and EGR. The engine will no longer depend on these systems to operate. This will prevent faults with these systems and reduce vehicle maintenance costs.
