Possible BSi/ecu fault

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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Doggy
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Re: Possible BSi/ecu fault

Post by Doggy »

richard9140 wrote:
Doggy wrote:Is crank / camshaft synchronisation OK?
Don't know - how do I test?
Can't exactly remember, it's in one of the sub-menus of the engine ecu. Could well be the ecu condition option too. If not check through Principle Parameters 1 & 2 and Driving Information.

Let me know if you can't find it & I'll go plug mine in / let you know.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
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richard9140
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Re: Possible BSi/ecu fault

Post by richard9140 »

ok, I'll have another look tonight after work. ECU is unlocked - checked late last night
2003 2.0 Hdi Estate
2004 Honda CRV
2004 Mercedes Viano 2.2 CDI
richard9140
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Re: Possible BSi/ecu fault

Post by richard9140 »

Hi, have checked cam/crank synchronisation on PP2K - it says NO .....is this because its not running or a reason why its not starting??
2003 2.0 Hdi Estate
2004 Honda CRV
2004 Mercedes Viano 2.2 CDI
richard9140
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Re: Possible BSi/ecu fault

Post by richard9140 »

update on this one...

I have now tested the following components:

hi lift fuel pump in tank - replaced with secondhand and fault remained - also tested by diesel specialist
crank sensor
diesel pump - tested by diesel specialist
engine ecu - sent away for testing by ECU specialist and also tried using a test ecu
fuel pressure regulator - replaced with second hand one
crank and cam sensor synchronisation
key/immobiliser sync using PP2K
fuel filter - replaced with previous working one from recent service
BSI - tested by BBA reman


So after all the above its still not starting and I probably should have thrown in the towel a while ago but I don't like to give up!!

The original fault on the engine ecu was related to the fuel pressure regulator so this might be worth another look and a recurring fault on PP2K is the BSI not communicating with the engine ECU so possibly with the ECU and BSI both being tested OK it could be a wiring loom issue??

Any ideas
2003 2.0 Hdi Estate
2004 Honda CRV
2004 Mercedes Viano 2.2 CDI
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steve_earwig
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Re: Possible BSi/ecu fault

Post by steve_earwig »

I don't think it's the right circuits but there are a few connectors under the carpet in the driver's side footwell that sometimes get wet and, as a lot of it is mux, can produce some fairly unusual problems.

As you say, you seem to have eliminated almost everything, apart from the wiring :frown:
Unskilled meddling sin©e 2007

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richard9140
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Re: Possible BSi/ecu fault

Post by richard9140 »

Thanks Steve

I have looked in the footwell and all the wiring and connectors is clean and dry. I might try the relay/fuse board
2003 2.0 Hdi Estate
2004 Honda CRV
2004 Mercedes Viano 2.2 CDI
charliedog
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Re: Possible BSi/ecu fault

Post by charliedog »

Excuse my ignorance but what is a BSI?
annie
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Re: Possible BSi/ecu fault

Post by annie »

body sytems interface unit
richard9140
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Re: Possible BSi/ecu fault

Post by richard9140 »

Hello all

This was is now solved ! it was the engine fuse board (BSM)

thanks for all your help and suggestions

now its back on the road I'm thinking about changing seats and door cards for black leather - anyone got one in Cornwall?
2003 2.0 Hdi Estate
2004 Honda CRV
2004 Mercedes Viano 2.2 CDI
Malc
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Re: Possible BSi/ecu fault

Post by Malc »

Congratulations on the result. My first impression was Lift Pump which you may hear under the rear seat at switch on but as in my case the pump motor though turning was not strong enough to lift the fuel to the filter.
Worse than that my 2001 Hdi was an in-between and the hole to remove the LP was for the smaller later model LP and I had to physically enlarge the hole before I could get the LP out! It was either that or drop the tank. Gallic ingenuity!
benczuk
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Re: Possible BSi/ecu fault

Post by benczuk »

richard9140 wrote:now its back on the road I'm thinking about changing seats and door cards for black leather - anyone got one in Cornwall?
Where to in Cornwall and what spec 406? I would be interested in your front passenger seat if you do swap them out to make a desk chair.
2002 HDi 2.2 GTX Estate de-fapped
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