Cat 259D wiring schematic?

[Nige]

Expensive if it's the engiine ECM. Even if a Reman Part Number is available you could be looking at something like $3k+.

 

[Chrisso]

Why would we consider replacing ECM's without checking voltage on the sensor circuit? Just sayin.

Scanner will only read the information supplied through the data link, which comes from ECMs, which comes from sensors.

 

[ryan1239]

Looking for a wiring diagram for a 259d SN FTL08239.
Is there any wiring going to injection pump that would keep motor from starting?

 

[Nige]

Looking for a wiring diagram for a 259d SN FTL08239.
Is there any wiring going to injection pump that would keep motor from starting?

Check your message inbox for an electrical schematic.
The ECM controls the operation of the suction valve in the HP fuel pump so that would be a yes. However there is a lot more to the fuel system that that.

What symptoms are you up against and what has been done so far in the way of maintenance or testing.?

Does the electric fuel priming run for approximately 30 seconds then stop after you turn the key switch to the ON position.?

 

[ryan1239]

Motor was rebuilt and just installed. Hydraulic pump etc is not connected to motor. Motor cranks. Lift pump runs, but I need to test the flow and the duration. New fuel filter. Doesn't appear to be a line issue / plumbing. Not getting fuel to rail. If a sensor that was part of ECM circuit was not connected would that keep it from starting?

 

[Nige]

If a sensor that was part of ECM circuit was not connected would that keep it from starting?

If it was an engine-related sensor probably yes.
Can't say I have any experience of testing an engine that was not installed in a machine with all the drive and implement systems hooked up.

Are you getting engine oil pressure.?
Any warning lights on the dahs.?

 

[ryan1239]

Have fuel to the rail. Noticed when Im cranking I have no engine RPM. Have a running 279d and when that gets cranked it registers at about 200rpm. Is the RPM taken off the crank, Cam or some other sensor.

 

[Nige]

Is the RPM taken off the crank, Cam or some other sensor.

It's taken from both crank and camshaft sensors and if one or both signals is missing then it will throw a Code. Somehow it needs ET hooked up to the machine and download a PSR for study. You may have multiple issues and you really need to know exactly what you are dealing with in order to be able to accurately troubleshoot it.

Problems inside the engine wiring harness can often cause an engine speed sensor Code. that's a very common one. I would imagine the harness was removed/refitted during the enging rebuild.?

 

[MossyRockRanch]

Have you tried resetting the display.?

So, how do you do that? I'm having the exact same issue. I have never seen a successful fix posted. Have you?

 

[MossyRockRanch]

I’ve tried resetting the display with no change. I did check voltage at the plug it said 5v. I’m not sure about checking voltage with the sensor plugged into the actual plug. I’m still curious as to why it doesn’t throw a code when unplugged. There is no changes. Even with a scanner hooked up still reads 140° from engine ECM.

Did you get a successful fix??? I have the exact same issue.

 

[Nige]

So, how do you do that? I'm having the exact same issue. I have never seen a successful fix posted. Have you?

Post a photo of your display please. Not all the available types of display have the capability of being reset.

If you want to go further then a Serial Number is required.

 

[MossyRockRanch]

I'll go get a Pic. It's a 2016 259d
I was curious if the guy solved the problem of the gauge stuck at 140°? Did he fix it?
personally I'm leaning toward it being the ecm.
I have a brand new wiring harness and a new tstat and sensor. Plugged or unplugged it reads 140°. Even after an hour of run time.

 

[MossyRockRanch]

 

[Nige]

I'll go get a Pic

Get the Serial Number as well while you are there.

I have a brand new wiring harness

Which harness.?

 

[MossyRockRanch]

FTL06865

 

[MossyRockRanch]

The main one for the whole engine. Was like 1500 bucks

 

[Nige]

You have the Advanced Display. To reset, turn the key ON and allow 15 seconds or so for the panel to boot up. Press and hold the two outermost buttons on the bottom row for 5 seconds, then release. Turn the key OFF and leave it off for 60 seconds. When you turn the key ON again the display should be reset.

I take it you have Diagnostic Codes.? Which ones.?

 

[MossyRockRanch]

Main harness for the whole engine. It was like 1500 bucks I think

 

[MossyRockRanch]

No codes

 

[MossyRockRanch]

I'll give it a shot.