"Engine Sensor" fuse keeps blowing

[davesteve]

It's a 10 Amp fuse. Second one down on the right hand side of fuse box. Have not had any problems with the tractor since I bought it new in 2016.
Seems to go out when front loader is being used and it seems to be when tractor is on a decline towards the front.
It gives F03 (132), F04 (1076) and F31 (132) and sometimes F11.
Talked to dealer. He thinks it's a short somewhere and codes may not be related. May be "safety switches/sensors". Not sure exactly what that covers and why it gives codes that are not relevant??
So far just wiggled wires. Sometimes it works, sometimes it doesn't.
Will get anywhere from an hour to four hours, then it blows again.

Trying to get a plan to tackle it, before resorting to taking it to dealer.
Any info/help would be appreciated.
Thanks.

 

[alexpops]

Check your wiring runs for burnt/chafed insulation or something else causing an intermittent short. Maybe along/near the loader frame or front axle? I had a similar intermittent problem on a boat, would occasionally not start, & I found a wire running too near the exhaust. repaired the insulation & zip tied away from the manifold ... problem solved. Codes MAY be getting popped from a surge, so yeah, maybe not relevant. As far as the codes, on my 2016 XR4150:

s132 F03 -P0103- AMF sensor high fault
s132 F31 -P0100- AMF Sensor Failure
s1076 F04 -P0002- IMV control fault

F11's seem to be ECU related with some Rail pressure codes


If you don't find any chafed/burnt wires, when was the last time you changed filters? see if changing fuel filter/air filter help at all. If not, see if the attached help

 

[davesteve]

Thanks.
I changed filters recently. Just cleaned the air filter/housing.
Took off all the grounds and cleaned them.
Did the fuel pump air release thing.
Checked wires, couldn't see anything weird.

I hooked up an ELM327, with Torque Lite App and it gave me codes,

P0371 - Generic

Type	Powertrain - Ignition System or Misfire - ISO/SAE Controlled
Description	Timing Reference High Resolution Signal "A" Too Many Pulses

P0001 Fuel Volume Regulator Control Circuit/Open

P0003 - Generic

Type	Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description	Fuel Volume Regulator Control Circuit Low

Seems all the codes relate to, fuel, ignition or MAF sensor.

If the MAF (AMF?) sensor can be checked like a car?? I can do that.
Beyond that, can't think of much else to do.

 

[davesteve]

MAF sensor was OK. I finally got hold of a service manual. I see now why dealers don't want you to have them. It makes the tractor too easy to diagnose.
Traced the power wire from the MAF sensor back to the ECU, then back towards the fuse box under dash. There is a plate attached to the exhaust, that the wires are attached to. The problem is the plate has an edge and the wires are routed over the edge (poor design). So, of course, the wires rub on the edge while the tractor moves. Took 6 years, but the wires finally rubbed bare and caused the short. You can see it in the first pic (which is turned sideways).

 

[beer_hunter]

Where could one find one of these service manuals?

 

[alexpops]

Where could one find one of these service manuals?

Variety of sites will sell pdf downloads of various manuals. emanual.com etc. Search for "make/model" service manual. Need to hunt down the one you want/need. Dealers should have them.

 

[StevenInOlympia]

Thank you so much. I had this exact problem and you saved me so much time and money. I've attached photos that show the same issue. The blue wire is frayed by the smallest amount so you'll have to zoom in. 10 Amp fuse blown as well.

 

[cfpd267]

Thank you so much. I had this exact problem and you saved me so much time and money. I've attached photos that show the same issue. The blue wire is frayed by the smallest amount so you'll have to zoom in. 10 Amp fuse blown as well.

I spent 1200 dollars on fuel rail, sensors, MAF sensor, other sensors and still nothing. Finally found a fuse blown that I replace early on and then found this after googling sensor fuse blowing! Same wires grounded out. Works perfect after fixing!