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Turns but doesn’t start 2.0hdi
#1
I’ve just read https://www.berlingoforum.com/thread-20483.html

Mine is similar.

Background.
The car / van was working, left it on the drive for few days, and now it doesn’t start.
It had a new battery in November as the old one was shot and since then had been starting well.
It has the “Siemens rough running feature” and can Chuck itself into limp mode with the following code p1351. This usually happens if you try to pull away with no throttle. 
Other than that it’s been fine and passed it’s mot last month.

It’s airbag lights x2 came on shortly after mot and the usual clean of contacts under seats doesn’t resolve.

Issue.
It turns well but doesn’t start. The following codes come up on my Bluetooth scanner u1003, p1351 and I can’t clear them.



I’ve removed the ecu connections and they look good and clean so put them back. I’ve owned the car since nearly new and unlike the post above no one to my knowledge has messed with it.

The mechanic I’ve used in the past kindly came to look and plugged in his box of tricks and got the following codes 0504 and 0A08 and 0440 and 0480.

Your help please...
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#2
What engine do you have? Not much to go on!

P1351 is a glow plug relay fault code on most systems, U1003 is "can bus absent" code, no can bus comms will cause a no start if the ECU and BSI cannot communicate to authorise the key transponder. That's the more serious one.

0504 is a brake pedal sensing fault, but usually restricted to auto gearbox equipped cars.

0A08 is not in the Citroen database

0440 is "fuel circuit vapours recirculation malfunction" - only for petrol engines.

0504 is "high speed fan relay control"

I think your mechanics "box of tricks" is not so trick - the only diagnostics worth using on these is DiagBox. Most standard OBD readers - even the professional ones - are not much use on a PSA car.
My Van: 2012 B9 1.6 HDi Enterprise
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#3
(01-03-2021, 12:15 PM)hi thanks for the response, engine in the title 2.0hdi Siemens 90hplooks like a bunch of those are red herrings so need to resolve u1003 first. Would the bsi store the last ecu messages from when it did last communicate?thank youZion Wrote:  What engine do you have? Not much to go on!

P1351 is a glow plug relay fault code on most systems, U1003 is "can bus absent" code, no can bus comms will cause a no start if the ECU and BSI cannot communicate to authorise the key transponder. That's the more serious one.

0504 is a brake pedal sensing fault, but usually restricted to auto gearbox equipped cars.

0A08 is not in the Citroen database

0440 is "fuel circuit vapours recirculation malfunction" - only for petrol engines.

0504 is "high speed fan relay control"

I think your mechanics "box of tricks" is not so trick - the only diagnostics worth using on these is DiagBox. Most standard OBD readers - even the professional ones - are not much use on a PSA car.
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#4
Update, all fuses checked for ecu and vancom all ok.

Any thought on what to check next?
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#5
Hmmm not sure what you can read if the comms is down, all devices are reached via the BSI including the engine ECU - did you have water get into the cabin at any point? The BSI is prone to getting wet from a leak at the windscreen, sunroof, heater air intake etc depending on circumstances.

And sorry, I see the engine is in the title, failed to notice that. Some vehicles have vanbus and canbus, some later ones are canbus only. The canbus wires are a twisted pair of red and white usually. Could be corrosion somewhere?
My Van: 2012 B9 1.6 HDi Enterprise
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#6
Thanks for the response.
No cabin all dry.
I’ll look for red, white pair next.

Thank you
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#7
No probs. Check in the engine bay for any corroded terminals where the twisted pairs come from, ECU, fusebox etc. Can't remember if you said you pulled the ECU plugs, worth a clean with electrical cleaner / IPA

Have a look at this document:

https://www.berlingoforum.com/thread-20566.html
My Van: 2012 B9 1.6 HDi Enterprise
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#8
The vanbus wires will also be a twisted pair because the basic technology is the same, but I don't know anything about their colours. It seems that vanbus was dropped around 2008/2009 so it might be the case (or might not) that the M59s have vanbus but the B9s do not. The transition from one to tother was not straightforward!
Current: 2003 1.4i MS MPV - Lucifer Red
Prev: 2003 1.6 MS Desire - Bile Blue
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#9
Mines a 2005 and the handbook refers to vanbus I think
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#10
Update - manual references com2000 van network. Is that van bus?

The red and white pair. Do you have any references as to where they could be found.... which connector into the ecu? (Currently all the cables are wrapped going in to the 3 connector blocks so cant see easily) would prefer to carefully unwrap the correct one and leave the others undisturbed.
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