Heated DEF Tank

[photowrite]

Appreciate and enjoyed all the comments and posts about the cold weather DEF system and truck performance from those who have expirinced the temps.

I've been considering a trip to the cold north in the winter (Alaska) and wondered about how the DEF system would perform. But also figured there were locals using the rigs up there, and it can't be that bad or problematic or trucks wouldn't be selling.

 

[DGamelin]

Was working on a CB and notice that there is a spot in the fuse box for a urea heater fuse. The spot was blank it doesn't look like there is a heater. The manual said if applicable.

 

[HorseMan-AR]

Really? What fuse number was it?

Was working on a CB and notice that there is a spot in the fuse box for a urea heater fuse. The spot was blank it doesn't look like there is a heater. The manual said if applicable.

 

[Newsa]

Was working on a CB and notice that there is a spot in the fuse box for a urea heater fuse. The spot was blank it doesn't look like there is a heater. The manual said if applicable.

I think "if equipped" means if it's a diesel. It's in the manual that covers the hemi's too.

But I think the 2013 manual has a typo because it lists 3 diesel fuel heaters. One of them is probably a mis-labeled DEF heater.

 

[DGamelin]

I took a closer look
F-63 Ignition Coil (GAS) Urea Heater (Cummins Diesel) it is blank
F-31 Urea Heater Control if Equipped (1500 LD Diesel) it is blank These are the only two with the word urea.

F-09 Diesel Fuel Heater 40 Amp
F-37 Cummins Diesel Fuel Heater #2 30 Amp

Could F-09 share the load of both heaters. Does the fuel filter at the rear have a heater? If not #2 maybe for the urea. If mis-labeled I wonder where it would be?

 

[gsbrockman]

F-09 Diesel Fuel Heater 40 Amp
F-37 Cummins Diesel Fuel Heater #2 30 Amp

Could F-09 share the load of both heaters. Does the fuel filter at the rear have a heater? If not #2 maybe for the urea. If mis-labeled I wonder where it would be?

F-09 is the underhood fuel canister housing heater
F-37 is the rear water separator fuel heater

 

[Newsa]

Mine has a 20 amp fuse in F63. And since diesels don't have ignition coils (no spark plugs) I venture to say that must be the DEF heater.


Weird to me that the chassis heater has a lower amp fuse than the filter cannister heater but maybe there is also a sensor or two running off that 40 amps?

 

[Newsa]

I took a closer look
F-63 Ignition Coil (GAS) Urea Heater (Cummins Diesel) it is blank
F-31 Urea Heater Control if Equipped (1500 LD Diesel) it is blank These are the only two with the word urea.

F-09 Diesel Fuel Heater 40 Amp
F-37 Cummins Diesel Fuel Heater #2 30 Amp

Could F-09 share the load of both heaters. Does the fuel filter at the rear have a heater? If not #2 maybe for the urea. If mis-labeled I wonder where it would be?

All 2013's and some 2014's didn't have the Fuel tank heater turned on from the factory. I believe they fixed this for 2015-2016.
The heater is not in the rear filter/water separator. I believe it's closer to the fuel line coming from the tank (but in the tank).
If you look at the chassis water sep/filter, you will see the wire for the tank fuel heater that runs near the wire for the water Sep, but past it.

There is a TSB for turning on the fuel tank heater. I had to argue with my dealer that there is a fuel heater in my tank and walk them through the TSB. (And show them the wires going to the tank fuel heater)
The computer (BCM/ECM) doesn't recognize the installed tank fuel heater until it is told to look for it.

 

[Newsa]

https://www.turbodieselregister.com...r-engaged/page4?highlight=chassis+fuel+heater

In this thread, you will see a picture of the chassis fuel heater wiring courtesy of gsbrockman.

 

[gsbrockman]

The heater is not in the rear filter/water separator. I believe it's closer to the fuel line coming from the tank (but in the tank).
If you look at the chassis water sep/filter, you will see the wire for the tank fuel heater that runs near the wire for the water Sep, but past it.

I was always under the assumption, based on the material that the fuel separator attaches to, that the actual base contained the heating element.

 

[Newsa]

If you follow the wire from your picture in the thread (link above) the wire comes down the wiring harness on the passenger side splits from the water seperator, and curves around the front of the tank. Correct me if I am wrong.

 

[gsbrockman]

If you follow the wire from your picture in the thread (link above) the wire comes down the wiring harness on the passenger side splits from the water seperator, and curves around the front of the tank. Correct me if I am wrong.

#ad

The connector/plug on the right goes STRAIGHT to the top of the fuel separator mounting base.
The connector/plug on the left is where one checks for 12V+ power.
I'll bet you're confusing that with the WIF (water in fuel) sensor wiring.

 

[Newsa]

You're probably right. I thought I read somewhere that the fuel heater was in the tank.

But you have researched this more than I have.

 

[Newsa]

tank heater

Actually, this is from a 2nd gen. Used to be in the fuel module. Maybe they moved it to the chassis water seperator.

 

[Newsa]

Since 2nd gens may not have had a chassis fuel/water seperator, I guess that's why they couldn't put a heater there.

 

[DGamelin]

This is interesting, my first thought was what gsbrockman said in #26. Newsa Do you have a link to the TSB on turning on the fuel heater? And why is my F-63 blank, I would think the urea tank would be heated.

 

[Newsa]

I think GsBrockman had it all right. I was trying to rationalize why they would have such a long cord from the drivers side to the top of the chassis water separator. (Wire is snaked 10 ft around the Def and gas tank to the passenger side) But that's what they did. I thought they were bringing both the water separator sensor and fuel heater together down the same side of the wiring harness.

I think your F63 should have a fuse.

I did have a link to the TSB. It was on another forum.
But I think it was only 2013-2014 listed on the TSB. So the dealer would tell you it doesn't apply to you.
They can hook it up to their machine and if their machine sees both fuel heaters you're good.

 

[DGamelin]

My F-63 doesn't even have terminals.

I was looking for TSB's and found this the rear filter heater.

2013 Dodge Ram 3500 Fuel System, Diesel Service Bulletin 374890

Action Number: 10055338
Service Bulletin Number: 374890 Report Date: Dec 19, 2013
Component: Fuel System, Diesel
Summary: Dodge: due to gelling fuel in cold ambient temperatures, that causing chassis mounted fuel filter heater not to function and hard or no start condition, due to configuration setting in body control module (bcm). Model 2013-2014 ram 3500,

 

[Newsa]

http://www.cumminsforum.com/forum/a...unted-fuel-heater-operation-tsb-14-005-13.pdf

see if this link works. It is a pdf file attached to cumminsforum.com

 

[Newsa]

Take the TSB to the dealer and ask if you can watch them do steps 1-5. After selecting "details", you should be able to see if configured correctly (so it recognizes fuel heater#2

The first time I took it in, my dealer insisted stopping at step 5. That is where the BCM says thst no Chassis fuel heater is installed.
They said, "See no fuel heater #2"

I had to argue with them that ......that's what step 6-11 are for. ..... To reconfigure so the BCM knows there's another fuel heater. The BCM doesn't send juice there because it doesn't kmow its there.

Then they had this Ahhhh Haaaaa look like they finally understood. And they wanted to keep my printout of the TSB in case someone else needed it done.