L322 L322 Diesel Heater - Fuel Pump Location?!

Dom-300tdi · Dec 12, 2022

Hey all,

I'm trying to troubleshoot a non-starting diesel heater on a recently acquired 05/06 L322. Before I go taking too much apart, I was hoping someone could tell me the location of the diesel fuel pump which supplies fuel to the diesel heater.

Is it attached to or located close to the heater unit itself in the front of the vehicle or is it somewhere else in the vehicle nearer the fuel tank?

Diagnostics is telling me I have a short to ground relating to the diesel heater.

The heater appears to attempt a startup sequence for 2 mins and then shuts down.

I can hear it's fan running during this time but cant hear a clicking/tapping noise which i'd expect the fuel pump to make (but maybe i'm listening in the wrong place ?!)

My guess at this stage is a fault with the water pump, diesel fuel pump or glow plug , any tips or suggestions welcomed. Is there a Westabo maintenance manual available for download somewhere?

marjon · Dec 12, 2022

Pretty sure the pump is external on right hand rear tank. In a rubber mount on the rear subframe.

If you do a search for 2007-2010 L322 theres a manual out there to download. Which covers it well. there are other manuals too.
I cant attach a file to help you at the moment.

Believe @backinblack did some work on his.

J

Datatek · Dec 12, 2022

Dom-300tdi said:
Hey all,

I'm trying to troubleshoot a non-starting diesel heater on a recently acquired 05/06 L322. Before I go taking too much apart, I was hoping someone could tell me the location of the diesel fuel pump which supplies fuel to the diesel heater.

Is it attached to or located close to the heater unit itself in the front of the vehicle or is it somewhere else in the vehicle nearer the fuel tank?

Diagnostics is telling me I have a short to ground relating to the diesel heater.

The heater appears to attempt a startup sequence for 2 mins and then shuts down.

I can hear it's fan running during this time but cant hear a clicking/tapping noise which i'd expect the fuel pump to make (but maybe i'm listening in the wrong place ?!)

My guess at this stage is a fault with the water pump, diesel fuel pump or glow plug , any tips or suggestions welcomed. Is there a Westabo maintenance manual available for download somewhere?

Glow plug problems are common on the Webasto unit, can you smell diesel from the exhaust?

backinblack · Dec 12, 2022

I was wondering how long it would be before we had some FBH posts

Under the tank. It's a pulse type and you can pulse it by tapping 12v to it.
If you search online for Webasto thermotop c manual there are a number of sources.
As @Datatek says glowplug is favourite but I have a few that have various faults, water pump, circuit board etc.
There is some test software and cable that give better diagnostics.

nevillen · Jan 14, 2023

Does anyone know if there is an app or similar that can remotely access the webasto system without spending a fortune?

kermit_rr · Jan 14, 2023

You can get a fob for remote on/off if you have the receiver in the boot, next to the rear fuse box

Datatek · Jan 14, 2023

kermit_rr said:
You can get a fob for remote on/off if you have the receiver in the boot, next to the rear fuse box

Think he's talking about diagnostics Kermit

nevillen · Jan 14, 2023

Thanks for the replies, it was referring to getting a key fob or something similar as opposed to diagnostics...bit of a folly really because I don't really need to preheat the beast, I just wanted to know in case I go up to Scotland.

backinblack · Jan 14, 2023

Some info here on how both @kds and I did it, and what we used. kds's solution was better as it had a built in timer.

https://www.landyzone.co.uk/land-ro...basto-wtt-software.366722/page-2#post-5056063

kds · Jan 22, 2023

backinblack said:
Some info here on how both @kds and I did it, and what we used. kds's solution was better as it had a built in timer.

https://www.landyzone.co.uk/land-ro...basto-wtt-software.366722/page-2#post-5056063

Sorry @backinblack only just seen you tagged me on this thread, took the Vellman kit out the 53 plate RR and fitted it in the 08 RR I have now even though it has the telestart unit fitted I could`nt find a remote for a decent price at the time. I disconnected the telestart and wired in the Vellman as before and it works just the same, nice to see the frost melting off the screen after the FBH has done it`s thing before you drive off.

backinblack · Jan 22, 2023

kds said:
Sorry @backinblack only just seen you tagged me on this thread, took the Vellman kit out the 53 plate RR and fitted it in the 08 RR I have now even though it has the telestart unit fitted I could`nt find a remote for a decent price at the time. I disconnected the telestart and wired in the Vellman as before and it works just the same, nice to see the frost melting off the screen after the FBH has done it`s thing before you drive off.

No problem, notifications are a bit hit and miss at the moment. I still have a remote but I don't know if it's that or the telestart that's faulty.

backinblack · Jan 23, 2023

Just putting this here so I don't lose it, and for enyone interested.. Replacement for the Vellerman 2 is VM130V2SET.

kds · Jan 23, 2023

backinblack said:
Just putting this here so I don't lose it, and for enyone interested.. Replacement for the Vellerman 2 is VM130V2SET.

Interesting.

backinblack · Jan 24, 2023

kds said:
Interesting.

I like the built in timer rather than my separate one that I have to remember to switch off. And the phone app to program it.

L322 L322 Diesel Heater - Fuel Pump Location?!

Dom-300tdi

Active Member

marjon

Well-Known Member

Datatek

Well-Known Member

backinblack

Well-Known Member

nevillen

Well-Known Member

kermit_rr

Very

Datatek

Well-Known Member

nevillen

Well-Known Member

backinblack

Well-Known Member

kds

Well-Known Member

backinblack

Well-Known Member

backinblack

Well-Known Member

kds

Well-Known Member

backinblack

Well-Known Member

Similar threads