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Discussion Starter #1
I have been looking through the forums for a solution to the "Low Battery" problem but not really getting anywhere.

My car is a 55 plate Scenic 2 1.9 dti with the handsfree "keyless" card system.

I last drove the car 2 days ago and all seemed well.

(Hopefully this is not a red herring but I did stall the car about 30 secs before I parked up and may have pressed the start button as the car was still moving, probably about 10 mph, surely this would have cause the error though, would it!!!!!!)


When I press the start button the start sequence seems to progress normally i.e. dash display illuminates as normal, steering unlocks, oil level monitors ok, up to turning the engine over where I then get the "low battery", "low oil pressure" and "parking brake fault" etc warnings on the dash display, the radiator fan runs on for approx 5 minutes then stops (seems to run fast for 2-3 mins then slow for the remainder).

All other electrical and electronic functions appear normal.

I tried a jump start but made no difference. I have removed the battery and recharged over night so that should be ok. Whilst I had the battery out I checked for water ingress but there was none obvious and I have re-seatted all the connectors I could access.
I haven't checked all the fuses or relays in the fuse/relay box (RHS next to the battery whilst looking at the windscreen) as I'm not sure how it comes out, not looked at it closely yet but any clues??

It appears this has been mentioned before but there doesn't appear to be a definitive solution. Best I can see is either wiring from the fuse box to the unit behind the battery, not sure what it is called, or Renault charging lots to replace injection computer, ECU, other electronic units etc. Unfortunately I live 30 miles from the nearest Renault garage anyway and a bit stuck without a car.

Anyway, all help would be gratefully received.
 

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I have the very same problem with my 54 plate scenic.
Over the last three days it has been hit or miss that it starts, but this morning it won't start at all.
Any suggestions or help would be great.:confused:
 

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It would do no harm to get the battery charged and then load tested. Also get the alternator voltage output checked.

Both these checks can be done by a decent battery supplier or auto-spark. Many do this check free of charge in the hope of gaining a sale.

No gaurantee that is the problem but at least it helps narrow the field of search.:)
 

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Discussion Starter #6
Does anyone have a list of the fuses? Can't seem to find much info on them.
Also, where is the starter motor supplied from?
 

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Discussion Starter #7
Not changed the battery but I've connected another battery, recharged my battery and still the same. Got 12v no load and 11.5-11.7 when the START/STOP button is pressed.
I have all good fuses and 12v supply to the starter motor (which was no easy feat checking on the Engine multiplex module and fuse areas).
I spent ages under the car and can't get to the solenoid wire and therefore can't test for voltage when the START/STOP button is pressed or see what colour the wire is to trace back to the Engine multiplex module. The Haynes manual says it's orange and on a black connector which doesn't seem to match with the actual module layout/wiring colours. Anyone know what/where the Starter motor solenoid wire is?
Why is a starting circuit test point (starter motor connection points) so difficult to access. Why do we seem to accept this kind of build/design.
 

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I had this problem with my 2006 scenic!

There is a fuse that goes on/next to the + ive connector on the battery. Its not a standard blade fuese, but will have some writing on it... I think it was red/orange.

This had blown on my scenic, causing a drop in a supply to the ECU - causing the multiple warnings on my dash.
 

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The car has been to the local garage. All fuses checked and wiring looms checked. Tried to connect the diagnostic unit but it would not connect to the car. Will need to go to Renault now.

Found a useful link to some Renault documentation though

:censored:
Link Removed by Admin
 

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The diagnostic failing to connect would suggest no power to the ECU/UCH. Have you checked the fuse as suggested on the battery terminals?
 

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Discussion Starter #11
All fuses have been checked and the diagnostic computer can talk to other ECU's i.e brake ecu etc. Just can't talk to the Engine ECU.
 

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if the cooling fan is on then it would suggest an injection computer fault unfortunately, the best thing is to get your dealer to check it
 

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This exact problem has happened to me last night. I was trying to remove and clean the TDC sensor as my 04 Scenic was getting harder and harder to start only in the mornings (15 mins of turning over). Had to remove the battery to get to it but after a lot of work couldnt get the sensor out due to the stupid location of it.

Connected it all up and now it wont turn over, fans blowing, oil pressure warning, low battery warning, parking brake etc. Charge battery overnight to no avail.

Reading this thread I'll check for this fuse near the pos battery terminal but wondered if hughsie ever got to the bottom of the problem?

Cheers
 

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Sorry, I took the battery out again this morning and found trapped round the back a small lead that should have gone to the neg terminal Doh! Must have missed it when taking it off as don’t remember disconnecting it.

Back to normal now, normal being I need to see if it will start more easily tomorrow and also have to get someone to look at the Dephaser pulley problem and then the cam belt.

Kerching!
 

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my battery died and when i replaced it i had the 'check parking brake' fault each time i started the car (03 scenic). I had to get my local dealer to clear the fault. he said that it was because the previous battery had failed. if you just disconnect the battery for any reason the fault will not appear. £40 to fix.
 

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Discussion Starter #16
The problem was eventually found by a Renault Specialist garage who charged for about an hours labour. It was a open circuit wire between two ECU's.
A certain Electrical specialist had the car for 2 days and didn't have a clue. I had to query why they wanted to replace a card reader and immobiliser.
 

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got same problem here on 04 scenic, I fully charged battery at work but as soon as I put load on it shows batt low stop on dash . ive had battery check at garage that's good however low amps from altinator so battery not charging so running fine until battery drains then get all faults you've listed. got it booked in today for new altinator so will let you know
 

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Just had a nightmare day with a similar problem. I stalled the car in a traffic jam and then it just wouldn't start again. All other electrical items appeared to be working fine. AA came out and tested for error codes and the battery - all coming back fine. Since then the 'Low battery' message has come up, as well as 'Parking brake fault'. I've just had the cam belt and alternator replaced by an independent? Could this have caused the problem? Is there any way to fix it? Please help - I'm ready to torch this thing. Cheers:steam:
 

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Just had a nightmare day with a similar problem. I stalled the car in a traffic jam and then it just wouldn't start again. All other electrical items appeared to be working fine. AA came out and tested for error codes and the battery - all coming back fine. Since then the 'Low battery' message has come up, as well as 'Parking brake fault'. I've just had the cam belt and alternator replaced by an independent? Could this have caused the problem? Is there any way to fix it? Please help - I'm ready to torch this thing. Cheers:steam:
If it starts easily with a jumpstart
Check the megafuse on the positive battery connector as I just got brand new battery and had to jumpstart it still,but then I checked the fuse which is duff £3.49 from main dealers.
 
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