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Battery Charging Fault **Fixed**

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battery battery charging fault charging fault fixed
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#41 ·
driving a few days with new EA640 and charging voltage is about 13,6V
voltage in morning before starting engine is 12,60V.. like like used battery or faulty charging system, then i read this..
now it is easier to me to get the point :-D

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renault master charging voltage

i have a Renault master DCi 125 - 2015 i have installed a split charge system to charge a AUX batt so i can use an inverter with out worry the issue i have is the battery's never get to full charge. if the battery is below 12v the alternator will out put 14.2v (little low but ok) after a short...
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#42 ·
Thank you for the reply. (my english is not so good)
I live in a small city in Romania. Yesterday i finded a Renault Megane 2012 with 1.6 petrol engine.(here 90% are with diesel engine). I asked the car owner to check his car. I started the engine, then I measured the charging voltage with a digital multimeter, AND....it was 13,45V constant!!! So after this measure I think that we dont have problem with the charging system! On my car after starting the engine I measured 14,5V, after 10-15 seconds the charging voltage dropped down to 13,4-13-5V!
 
#43 ·
It is power managment. Yes..
Diesels also have such stuff..
Alternator no more fills battery all time with highest voltage, but only necessary. It is because of ecology. Less stress for alternator, less gasoline consumption.
But in behalf of battery better lifespan, charge it manually with some charger once in 2 weeks, especially in winter.
I nave some smart charger from lidl, works good..


Image
 
#44 ·
Mike H025 said:
This still sounds like battery is not charged properly, starting with it being left in a airport car park for a week.

Low battery charge can also trigger an ABS error by itself because battery power is needed to work the ABS pump, not enough 'juice' = no ABS.

A new battery should be given a preliminary charge before installing, despite being 'new'.

Don't know why heater won't now work, suggests mechanic has c0cked something else up during previous work. He doesn't really seem to know what he's doing. But you not driving it around still means it's not getting charged. Any chance of putting a battery charger on it? Then see what it does.

You say belt was changed? If so was water pump also changed, if yes, means needed new coolant, and if not refilled properly air locks may result which could explain why heater doesn't now work, it's no getting any hot water.

Also possible - bad cables / connections between alternator and battery, bad earth cables between body and engine / gearbox.


Tried changing the alarm battery if it's dead it will drain the main battery on some vehicles.
Click to expand...
 
#45 ·
Nottnoc said:
Does this vehicle have auto Stop Start ?
Where the engine stops & restarts when clutch operated.
So equipped cars need the car to be told it has a new battery using diagnostics.
Similarly diagnostics will be required to identify the cause of the ABS nag.
How good is your Mechanic? Renaults get arsy if the battery is not disconnected in the correct manner.
Try this.....
Bonnet up, drivers window open, Keycard out as if leaving car, shut door, DO NOT LOCK, wait 5 Minutes until computers have gone to sleep.
Ensure you have radio code. Disconnect battery Negative. wait 5, reconnect. No cost check, innit?
Report back.
Click to expand...
Good evening,

I have a similar problem, it started yesterday, every time I came to a stop the battery charge fault displayed. if I increased the revs the light went off. I have looked at it today and tthe meter read battery voltage so I tried the above re-boot after which I had 12.4v increasing to 13.4 at 2000rpm. I have just taken the car for a run and the fault came back, I have rechecked the battery and the voltage doesn't increase with revs, Is this pointing to the regulator please?

Thanks
Phil
 
#49 ·
ours2012 said:
would help if we knew what type of car you have, and the year
Click to expand...
Sorry missed that bit, lol.
Yes, 2007 Grand Scenic 2 1.9dci, no other electrical problems recently although have a couple of old faults that need clearing off.

Looks like I'll be removing the alternator tomorrow, is the regulator best first option or just replace the unit?
 
#50 ·
Phil64 said:
Sorry missed that bit, lol.
Yes, 2007 Grand Scenic 2 1.9dci, no other electrical problems recently although have a couple of old faults that need clearing off.

Looks like I'll be removing the alternator tomorrow, is the regulator best first option or just replace the unit?
Click to expand...
Now added that to your details and it will show every time you post Phil.. 😉
 
#51 ·
Might be that one of the diodes failed.
On idle you have lower voltage then necessary and on higher revs generator is pushing more power. In the meantime, engine is working on power from the battery.

But if the generator is failing, it's a good idea to rebuild it completely.
So diode bridge, regulator (as one unit or separately), bearings, brushes and contacts.
If generator dies on the road you can drive only as long as you have power in battery, half an hour or so. After that it's a tow truck.
 
#52 ·
612681 said:
Morning

I've had car into a local garage who couldn't resolve the issue. I've had a browse through this forum but can't seem to find anything.
I am personally not car smart with faults or repairs, I would have to ask a friend or take a garage for any work required.


Vehicle:
Renault Megane 2011 MK III 1.6 16V
Dynamique Tom Tom
61,000 miles


Problem - My dash is intermittently flashing Battery Charging Fault, ABS light, and STOP.
Video:


Background-
Car sat for a week in an airport car park while on holiday, when I returned the orange service light was illuminated.
Few days later this changed to a beeping alarm with BATTERY CHARGING FAULT and STOP light.
The mechanic changed the battery as it was overcharging.
Fault was still there so he changed the alternator.
Fault was still there with the new alternator.


My old alternator got sent for testing and no fault found so it got refitted.


So to date I have paid for a new battery, belt and labour with the mechanic not having a clue what is wrong.


He let me drive it away with the understanding it was a loose connection / wiring fault but now I am not getting any hot air from my fans, so I have not moved my car from before Christmas.
(Driving my girlfriends baby blue fiat 500 - not ideal!)


Someone has told me to change the regulator on the alternator, but had a look online for a mkIII alternator regulator and couldn't find anything. I think the regulator is contained within.


Looking for advice on my next steps please.
Anything short of taking it to the Renault garage for fault finding with a blank cheque would be a brilliant.





Thanks
Craig
Click to expand...
Believe it or not it can pick your phone battery up
 
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