DPF CODE

[CCM]

I'm working on a 2010 Mack MRU non-cat dpf system with SPN 3485 FMI 7 code for the atomizing air control module. I can run through the test procedures with PTT and the code will go inactive but then it returns. Has anyone worked with this system much that might have any ideas? I've tried a used module but gave same code. 

[Mackpro]

Bad wiring/rubbing ground or open  , which sounds easy till you try to find it  on a MRU or a LEU.  They do have new updated part # on the atomization module

Atomization Moduel.pdf

[CCM]

I'll check the parts numbers and see if it's been updated or not. I know this unit has had a few modules replaced. Yes, the wiring is fun to trace out on these. Thanks for the info Mackpro

[CCM]

Updating for information. It turned out to be a faulty Atomization module. While performing air activation tests the pressures we not consistant.