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2008 Citroen c4 Grand Picasso - BSM/BSI Fault


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#1 dalyoftelford

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Posted 03 February 2019 - 02:52 PM

Hi All

 

Had my picasso almost 2 years and never skipped a beat.

 

A few days ago i noticed the headlights were on and figured i had pressed the fob to turn them on, put i hadnt ...

 

went to the car opened the door adn they went off, when in the car i noticed the heating fan was running to ( Keys are in the house ) 

 

Went to go out half an hour later adn battery didnt have enought in it to start car.

 

Ive scanned it with a friends scanner and its showwing 2 faults in the BSM and 1 fault in the bsi

 

 

BSM engine relay unit fault , A9B7 ignition on relay short circuit to +, F5FF Unexpected reinitialisation of the built in systems interface, A4C9 fault : Illumination of the rear RH fog lamp - short circuit to + Illumination of the rear LH fog lamp - short circuit to +

 

 

Can anybody explain this to me? Is it a big repair job?

 

Right now the car is outside, battery is recharged and will start if I put battery on but I have to disconnect battery to stop lights and heating fan coming on 

 

 

cheers 

 

Paul



#2 granpa

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Posted 03 February 2019 - 03:11 PM

To me it looks like a short circuit though I think this would blow a fuse, or a relay that has failed and its contacts are fused together, but only guessing



#3 discv

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Posted 03 February 2019 - 03:28 PM

A total stab in the dark- I wonder if this is a water ingress problem. Where is this 'ignition on relay' mounted?

A9B7 Fault in the ignition positive relay or in the output harness from the relay : Short circuit to positive

 Maybe you will have to start pulling fuses to try and isolate the cause.

 

But I do know this- a garage will pull your pants down with this one!


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#4 dalyoftelford

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Posted 03 February 2019 - 03:39 PM

Thanks guys ... My worry is it going to a garage, I live on a small island. Getting the car fixed by a garage could be very expensive but is it something I could fix myself

#5 dalyoftelford

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Posted 03 February 2019 - 03:40 PM

Thanks guys ... My worry is it going to a garage, I live on a small island. Getting the car fixed by a garage could be very expensive but is it something I could fix myself

#6 dalyoftelford

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Posted 03 February 2019 - 04:28 PM

There is a green relay that clicks when the keys out . When it clicks the lights and heater turn on

#7 discv

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Posted 03 February 2019 - 04:53 PM

What causes that relay to click? Where is the relay? Could it have got soaked with water?

You must be close to identifying the problem- or at least narrowing it down. And this will help you if a garage gets involved.


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#8 dalyoftelford

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Posted 03 February 2019 - 06:09 PM

Green relay at the front of the fuse box under the bonnet

#9 Ozzie

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Posted 03 February 2019 - 09:35 PM

looked into this when a friend had similar problems.

 

Water ingress into the loom is common on the C4 Picasso due to a poorly designed drainage system in the scuttle area.

His contacts / pins had corroded.

 

hopefully not your problem but there is a lot of info. online ( inc. You tube ) for both cleaning up and mods to improve drainage.

 

 

 

 

 

 

 



#10 granpa

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Posted 03 February 2019 - 10:06 PM

First time I've heard the water/corrosion linked to the C4, usually the C3



#11 stimulator

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Posted 04 February 2019 - 08:30 AM

The C3 Picasso not the C3 saloons. On the C3 pics it's the screen washer pump splitting letting water into the electric side of it. The water then capillaries up the two supply wires to the fuse box in the engine compartment. This manifests as a badly corroded pins in the marron (centre brown one). The cure is prevention in this case, add additive to the screen wash reservoir to prevent it freezing.
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#12 Ozzie

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Posted 04 February 2019 - 11:07 AM

I've heard a lot about the water in the fuse box issue in C3 pics. but the C4 can also have similar problems
 
this is the sort of thing , from a French car specialist blog

Citroen C4 Picasso and grand Picasso:

More and more, we are getting Citroen C4 Picassos with water ingress in looms and water damage inside them, with all the obvious problems that that causes
damp in the car and subsequent electronic issues.
The main cause of the problem is an under-designed drainage system in the scuttle area (gutter that exists in front of the windscreen).
On account of this, a/c blower motors and blower modules are frequently in need of replacement, a stripping and carrying “open heart surgery” service that is being carried out on looms in order to save them.
It is, in fact, easy to spot the problem, as the distinctive sloshing noise of water moving around can be heard from inside the car. To remedy the problem, wemodify the drainage outlets so that the problem becomes less likely to re-occur.

#13 granpa

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Posted 04 February 2019 - 12:12 PM

Back to the drawing board then Citroen


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#14 gittos

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Posted 04 February 2019 - 02:45 PM

This has always been an issue with the C4P..

 

When I had the same model as yours Granpa i noticed the sound of water sloshing when cornering, I loosened the wheel arch liners enough to get my hands behind and cleared the rubber drain funnels (some people remove them).

 

I was fortunate that I found it before the water entered the heater blower. Just check that water is draing away by pouring some in the scuttle and see if it drains out behind the frnt wheel (both sides)


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#15 discv

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Posted 04 February 2019 - 03:37 PM

Although the points raised about water sitting in the scuttle are all valid, I'm inclined towards water getting in the area of the battery, engine bay fuse box and the loom and relays in this area. My thinking is driven by the fact that the OP has circuits powered up as and when they want to.

Plus, apart from a short, I can think of no common factor with the heater fan and the head lights.


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#16 granpa

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Posted 04 February 2019 - 04:25 PM

Count my blessings I have a garage and the car only sleeps out during a holiday so it gets very little of the bad weather and this time of year it is only used once or twice a week