C5 all systems off.

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admiral51
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Re: C5 all systems off.

Post by admiral51 »

wheeler wrote:
21 Aug 2021, 16:27
I still dont understand where the foglamps come in to this.
The only thing i can think is that it went through deep water and as being low down by unplugging them it could be a way to test again when they are plugged back in

Colin
seanrx
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Re: C5 all systems off.

Post by seanrx »

My mistake, 0.10 yesterday. 100 milliamps.

But meters fuse is blown, so no more amp readings.
Peter.N.
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Re: C5 all systems off.

Post by Peter.N. »

What I should have said was that the instrument lights go out in about a minute.

Peter
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white exec
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Re: C5 all systems off.

Post by white exec »

100mA is a problem, enough to cause battery drain.
seanrx
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Re: C5 all systems off.

Post by seanrx »

Hi all.

I used a new MM today, battery draw is:
0.03 (10A) or 00.3 (200m).

So, only 30 Millivolt draw. Am surprised, yesterday I corrected myself because it's a Citroen, had to be 100mv!

Fuse volt drop I do anyways, 00.1 for six of them the others all 00.0.

And this, with a fully charged battery I drove around my driveway, engine off then on, third restart did'nt happen, battery volts at 12.2.

This fault began after I drive thru deep puddles so possibly a mechanical/earth fault, rather than flaky ecu systems.
wheeler
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Re: C5 all systems off.

Post by wheeler »

That draw is well within spec.
I’d get the battery properly tested before going any further.
It could be total coincidence, a car battery can fail at any time & often without any warning whatsoever.
seanrx
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Re: C5 all systems off.

Post by seanrx »

Am thinking this also.

Will have the batt load tested, as at full charge the engine stutters on start up.

Then more fault finding if needed.
Hell Razor5543
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Re: C5 all systems off.

Post by Hell Razor5543 »

The C series Citroens are very electronic (lots of ECUs and so on), so a failing battery can throw up all sorts of weird problems that can make fault finding very 'interesting'. It should be that if a C Citroen starts doing strange electrical things getting the battery properly tested should be the first port of call.
seanrx
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Re: C5 all systems off.

Post by seanrx »

So, it was a battery fault.

Load test of 8.7 volts!

And on last recharge and refit to car, the volts dropped to 12.4, just with systems booting up.

It's a large battery too, 680a x 74ah. Bosch S4.
Previous owner was taking no chances for this 2.0L car.

I will post a Q about my alternator and that will be fault finding complete.
Hell Razor5543
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Re: C5 all systems off.

Post by Hell Razor5543 »

How old is the battery? Even good ones (and Bosch is normally a good name) have a finite lifespan, and if it is very old that could explain the problems.
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GiveMeABreak
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Re: C5 all systems off.

Post by GiveMeABreak »

seanrx wrote:
24 Aug 2021, 11:43
So, it was a battery fault.

Load test of 8.7 volts!

And on last recharge and refit to car, the volts dropped to 12.4, just with systems booting up.

It's a large battery too, 680a x 74ah. Bosch S4.
Previous owner was taking no chances for this 2.0L car.

I will post a Q about my alternator and that will be fault finding complete.
I fitted a Bosch AGM S6 to my C5 X7. It needed it, but leaving it standing for a week was hopeless. I still had to frequently top it up over the pandemic, so in the end, I put the shunt fuse into Park Mode - to turn off some of the systems to prevent severe battery drain. Never had an issue after that - just moved the fuse back to customer mode when I started using it more regularly.
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white exec
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Re: C5 all systems off.

Post by white exec »

Marc, that's just plain dreadful.
Surely-to-goodness it ought to be possible to leave a car for a week without coming back to find it immobile!
Not a car to drive to an airport with, then.
What were Citroen thinking??? #-o
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Re: C5 all systems off.

Post by wheeler »

I think original battery is 720cca (EN) so I reckon the battery you had in it was too small anyway.
As for AGM & EFB batteries, i dont rate them at all, they dont have in general anywhere near the same lifespan as a regular flooded battery. I would only put one in a car if it needed it & would never put one in as an ‘upgrade’.
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GiveMeABreak
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Re: C5 all systems off.

Post by GiveMeABreak »

Yes, that's what I figured too! I'm not overly impressed with Bosch batteries (this being the second one), so will likely be going YUASA next.
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white exec
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Re: C5 all systems off.

Post by white exec »

Yuasa YBX3000 seem good for 6 years+ here.
Both BX and XM on YBX3000 092-size, €99 here. RAV4 diesel had one too.