CAT 259D - No Crank E459-2 Code

[Dave Novak]

Hey there. I have a 2018 299d2 and engine code 459 but the motor starts up but starts to miss fire at 1400rpm. Have you ran into this before

 

[mohali85]

Nope mine never runs

 

[Nige]

Hey there. I have a 2018 299d2 and engine code 459 but the motor starts up but starts to miss fire at 1400rpm. Have you ran into this before

Have you tried the simplest known fix.? Remove, clean, & refit the engine ground strap making sure the hardware is tight. One end of it is up behind the HP fuel pump, circled below. Don't just disconnect that end, do both.

 

[henrywest]

could some one help me out with the electrical schematic i am having the same error E459 c0de

 

[mohali85]

Do you have et cat software , from my experience the best way is to see if there is any communication between et software and the ECM engine , if no communication probably the ECM is dead. If there is a communication then everything will be easy liking wiring or ground issue

 

[Nige]

if no communication probably the ECM is dead.

Unlikely in my opinion. The most common cause for an E459 Event (after a bad ground) is a break in either the CAN+ or CAN- wires of the engine harness.

I can't think of a single case here on the forum where the result of data-driven diagnosis rather than firing the parts cannon has been anything other than a bad ground connection or a bad engine harness.

could some one help me out with the electrical schematic i am having the same error E459 c0de

Someone could if you supplied a machine Serial Number...........

 

[DieselFit]

Good Day
Just wanted to clarify the symptom which was actually a Crank - No Start with a Faulted indication in the Advanced Display and error E459-2.
View attachment 243072
View attachment 243073

Checked for power to engine ECM and found no voltage on the ECM Power Relay Output contact #87. 20A fuse was good
checked for power at ECM Pwr Rly coil pin 1 and Machine ECM was providing 12v to pin 1.
Determined that ECM Pwr Rly Coil pin 2 was not being grounded by Engine ECM.
Traced pin 2 circuit (C903-C59-BU18) up to Conn 4 (Round 31 pin) at rear of cab. Continuity was good to the input side of connector.
found open circuit from output side of Conn4 to engine bay Conn 28 (12 pin )
Unable to determine where exactly the open was as this is poor access to that area of the engine bay - was unable to remove ECM cover due to hoses in the way.
Built a test jumper harness to ground pin 2 of the ECM Pwr Relay coil for test purposes.
When coil pin 2 was grounded a click was heard which was relay engaging and voltage was present at relay output to Engine ECM.
Turned key on, advanced display initialized, entered access code, no fault displayed, turned key to crank engine - engine cranked and started. No errors displayed.
Root Cause of concern was an open in ECM Relay Coil ground circuit (C903-C37-BU18) somewhere between Conn4 and ECM Conn J1. This prevented communication between the Engine ECM and Machine ECM setting the E459-2 fault.


Special thanks to Nige and Chrisso for their input in helping identify the root cause.

I had the same problem on a 289D several months ago. I posted where I found the broken earth wire for the ECM relay then. I'm not sure how to look it up now.

 

[Nige]

I posted where I found the broken earth wire for the ECM relay then. I'm not sure how to look it up now.

Is this the thread you were referring to.?

https://www.heavyequipmentforums.com/threads/299d2dc2-skid-steer-e459-2-does-start-at-all.104997/#post-1227193

 

[DieselFit]

Is this the thread you were referring to.?

https://www.heavyequipmentforums.com/threads/299d2dc2-skid-steer-e459-2-does-start-at-all.104997/#post-1227193

Yes.

 

[jrbramirez09]

This is the same problem I am dealing with on my skid steer. Can anyone provide a link to the electrical schematic?

 

[Nige]

This is the same problem I am dealing with on my skid steer. Can anyone provide a link to the electrical schematic?

There are many different schematics. Post a Serial Number to identify the correct one for your particular mahcine.

Also do a search on the forum using E459 as the search term. It wil lthrow up many threads, all of which may help you.

My advice is start with the basics and make sure ALL the grounds are good. Depending on model there could be a dozen of them scattered about the machine.

 

[jrbramirez09]

Fd203650

 

[jrbramirez09]

299d2

 

[Nige]

Fd203650

Electrical schematic on its way to your imessage inbox.

Before you go digging too deep I would suggest to do some research. It will pay you in the long run and will possibly save you a nunch of time.

 

[Jayhuds]

I'm having the same issue with my 259 was intermittent and now it will not crank I'm getting the E459-2 code I could use a wiring diagram machine serial is 259DHFTL08699.

 

[Nige]

I'm having the same issue with my 259 was intermittent and now it will not crank I'm getting the E459-2 code I could use a wiring diagram machine serial is 259DHFTL08699.

Check your message inbox.

 

[Glenn1944]

I am having the same issue with a 279d3. The relay for the engine ecu is not energizing. Could i get the wire schematics?

 

[Hunterdan]

I’m having same issues with my 2019 259D called cat out once , and brought it to them once it’s intermittent guy that came out said he reseated plug to Ecu and had it running the very next time I went to use it it threw same code and wouldn’t crank I removed batter put good charge unseated computer plugs and reseated got it to crank but was rough loaded on trailer while it was running and brought it to cat shop they had it for a week or two they changed fuel filter to solve running rough and then changed main power relay
And ran it for a day no issues then brought it home only used on driveway a little then I used auger on it put a pole up parked for lunch and it wouldn’t crank again after that check and cleaned all the physical grounds I know of changed engine wiring harness guess I need to check power to the Ecu
But need a wiring schematic I was wondering if someone could share one with me?
CAT0259DAFTL23653

 

[Nige]

Based on those symptoms I’d say it is highly likely that you have a problem with failing wire(s) in the engine wiring harness, most likely the CAN+ or CAN-

Someone else is going to have to ship you an electrical schematic because my computer is dead at the moment

 

[Hunterdan]

Thanks , I actually changed the whole engine wiring harness this past weekend and it’s still not working
Considering buying a new Ecu and trying it but there not cheap that’s for sure
But I need to check to see if existing Ecu is getting power to it before I go thru that expense I’m just not sure which plugs or pins to check