Hey all, new here. And sorry if this post for these smaller trucks don't belong in this forum.
At the place i work, we have 4 of these Dura-stars with cube boxes set up as service trucks at the iron ore mines around town here. Our most newest one is a 2012, with the maxxforce DT466 and roughly 8400 hours. The past few months this thing has been plagued with aftertreatment and body controller issues. We have the servicemaxx pro program at work and 3 active code are showing up. the code's are as follows...
SPN 3479, FMI 4 SAE Aftertreatment 1 fuel pressure 1 Control - Voltage below normal or shorted to low source
SPN 2225, FMI 14 Remote power module #1 (address 225) has a address problem, Drive train J1939 data link, An improperly addressed RPM module, or missing RPM module that the BC is expecting.
SPN 520465, FMI 2 HVAC control head multiple motor faults DM1, HVAC motor in wrong position or jammed.
The 1st code's the one that has us stumped, The truck recently had the whole DPF system replaced along with all the EGT sensors etc and just 3 days ago i replaced the aftertreatment fuel dosing valve, Fired it up and regened the truck... EGT temps went well up to the 1300f where they should be.. So I thought that solved the issue but now the truck is throwing the same code again. If i clear the code and run a regen again, the temps will climb to around 1000f then the code will flash and the temps drop to around 500f and the truck stops the regen. I have searched online everywhere for any info but cannot come up with anything.
I figured i would give this place a try, I hope somebody may be able to give me some insight on this.
Mark.
2012 Dura-star 4400 aftertreatment problems...
Discussion in 'International Forum' started by mc670, Aug 18, 2013.
Page 1 of 6
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
Yep, you're in the right place! I haven't had the pleasure of messing with these too much yet. First, the doser valve you replaced, is that the fuel injector on the turbo outlet pipe? International actually calls it the "Hydrocarbon Injector". There is a block with two solenoid valves and pressure sensors that monitors and controls the fuel pressure to the hydrocarbon injector. This block is located on the left side of the engine, towards the back, next to the rocker cover. Your 3479-4 code is being caused from either the wiring to or at this block or the valve that allows fuel to the injector. They call this valve the "Fuel doser Valve" so it can be confusing. The fuel doser valve is part of this block. The block is called the DSI unit, or down-stream injection assembly. When it is time for a regen the fuel doser valve is commanded to open and this allows fuel pressure to the injector. The doser valve is basically just an electrical fuel solenoid. This is commanded by the ACM, or aftertreatment control module. This is a separate electronic device outside the of the main engine ECM. The ACM is located along the left frame rail somewhere near the engine. ServiceMaxx cannot monitor anything the ACM controls. I have included some trouble shooting information. Chances are with the number of hours on the engine the DSI unit is toast.
Attached Files:
Wannabe tech Thanks this. -
-
No this is an electrical fault. The terminals inside the connector have been known to spread and make poor electrical contact. They will need to be checked. I found another diagram. You will need to trace the wiring between the DSI and ACM, including that 24 pin connector. Check for any corrosion or any other wire problems such as chaffing or really sharp bends that may have damaged the wire inside the insulation. If you have another truck with the same engine, try to swap out the ACMs and see what happens. It may be faulty too.
Attached Files:
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
Page 1 of 6