Berlingo adblue ecu no communication wiring and fuse

[kingjafad]

Hi,
I am trying to help out a friend with their Berlingo VF3**************[VIN obfuscated, can be read by forum staff] which has a fault causing no communication to additive pump ecu.
Diagbox shows Engine ECU flagging
U0118 87 Multiplexed additive pump
P1435 00 Multiplexed additive pump
And it also shows that it fails to communicate with the additive pump ecu.


Common sense says it could be a simple fuse/wiring to the plug above the tank.
My copy of Docbackup and sedre doesnt cover cars this new, so i am struggling to find the info I need.
Could someone post the wiring diagram from fuse to adblue tank please - with its routing too? Also repair/replace instructions with pics to show how the tank is meant to be lowered properly please?
I do have a scope to check CAN traffic when I get there too, as well as test light for powers and grounds.

Cheers
Phil

[GiveMeABreak]

Well first thing I'd say is dump the garage, as additive tanks for this model retail at Peugeot today for £252 inc. VAT......

It seems they are confusing the Eolys additive tank for the DPF with the Urea (Adblue) tanks for the Selective Catalytic Reduction system (SCR), which is not a good sign if they don't know the difference.

The first thing I would do is that on these there are known issues with the wiring about 30cms back from the Eolys additive tank that gets corroded. I would get a trusted mechanic to check this out first, because if this is the case, then replacing the Eolys additive pump will make no difference if the wiring is shot.

[kingjafad]

Wow, thanks Marc - I didnt have a good look the other day but the friend said it was the newer Adblue version of the depollution stuff, not the Eolys - I didnt get my head underneath to look yet (stupid i know, but it was wet windy and dark the other day and i only had about 5 mins to investigate) and I didnt have any reason to question him as he seemed confident.

Whats more, It turns out its a peugeot partner/horizon NOT a Berlingo! Doh - it looked more or less the same as their other car which is a Berlingo! I double checked the VIN with him over the phone - Its VF3**************[VIN obfuscated, can be read by forum staff] Just incase i had typed it in wrong on my post above. He has just physically checked and its got the adblue filler cap.
Apologies for me having a senior moment, they are happening more often these day

Feel free to move this to Peugeot forum.

I imagine the wiring is similar to older models however, i could really benefit from fuse and wiring diagram please

[GiveMeABreak]

No, not correct, at least not if the fault codes you pasted are correct - they have nothing to do with the SCR (Adblue system). These fault codes are solely to to with the Eolys additive for the DPF. These are separate systems that do different jobs.

I think it would help if you watched this to explain. The only thing they have not shown is the DPF additive tank, but this just injects a small quantity of Eolys into the fuel tank each time you add diesel, so is already in the fuel to help the particle filter regenerate and burn off the particulate matter. This vide shows the Adblue treatment as a first stage to treat the NOx, before the DPF captures the pariculates.



As for the vehicle it is a PARTNER TEPEE (B9) FAMILY SALOON 1.6 HDi 100 FAP (DV6FD) Manual gearbox 5 (With stop and start), so the same vehicle as a Berlingo essentially.

[kingjafad]

Thats a really handy video Marc - much appreciated. I guess i just assumed it would be EITHER Eolys or Adblue but not both - every day is a learning day. I had cleaned out the Adblue injector previously on their other Berlingo at the front of the exhaust at the front of the engine when it was clogged giving them faults so had what i thought was a basic understanding. I have also filled up Eolys on a 2009 308 and sorted that in Diagbox so i know what you mean about the wiring being open to the elements down there.
Ill get it on a ramp next week and have a closer look with him (benefit of being a member of a car club)

Edit - I just saw _ Can it really be that easy to get to??? Fingers crossed - I have just messaged my friend to go and look.

[GiveMeABreak]

Below is an old video now and before the SCR system was added as an additional measure to treat NOx, so only shows specifically the DPF functionality. So know that this system below is also incorporated into the video above in my last post, which only shows the particles being captured and not the complete process:

[kingjafad]

Update:
So long story short - there didnt appear to be anything wrong with the wiring harness, power and grounds and data lines all seemed fine. It is getting the additive (eolys) tank/pump replaced at some point this week (at least it isnt the crazy expensive adblue one!).
Thanks Marc for the direction and education - I'll not assume adblue and eolys are mutually exclusive again

[xsarawestcoast]

Power ground and data lines? To the eolys pump? I only see 2 wires

[GiveMeABreak]

@xsarawestcoast: Most later vehicles have multiplexed additive pumps, so Power, Earth and a Multiplexed connection to the BSI (LIN BUS in this case).

Older vehicles tend to have only 2 wires (to the Engine ECU and the Engine Fuse box).