I have a 2015 cat D5k2 serial#ky200618 Having problems out of the Accugrade started a few months back got to where it wasn’t reading accurate then when I would cut it off for lunch and get back in it it wouldn’t work the rest of the day just slowly got worse to where now it doesn’t work at all every now and then it will come back on but doesn’t read right and goes away immediately and this week my def and fuel level started acting up going in and out not sure if one problem has any relation to the other thanks for any help not really sure where to start looking
Do you know how to retrieve Diagnostic Codes & Events using the Monitor.? If not then see the attachment. A list of Active Codes would be the place to start, swiftly followed by a list of Logged Codes..
View attachment IMG_0164.jpeg This was all the fault codes
OK, so you only have two Active Codes from that list. 246-9 which is a CAN Datalink Fault and 4651-9 which despite the "Unknown Fault" on your Code list is actually the Blade Inertial Measurement Sensor which is part of the Accugrade setup. The result of that Code is that the Accugrade Slope Assist function will be inoperable. The -9 suffix on both of them is "Abnormal Update Rate" which effectively means that communication on those two networks is not there all the time. So the $64k question is how good are you with electrics/electronics.? Because correctly diagnosing both of these Codes could present quite a bit of a challenge. Before we go any further though, can you look down both sides of the engine to the belly guard. Is it full of dried/caked mud.? Because if it is that is a location where various connectors for both the Datalink and the Accugrade live. If water has entered those connectors and caused corrosion, that could explain both your Codes. Refer to this THREAD and start from Post #28 on Page 2 where the poster describes what he found in the space between the bottom of the engine oil pan and the belly guard.