Renault Scenic 2 Ph2 - Charging voltage over 15V. Where is the regulator?

Renówka began today having a delay after pressing START to start cranking the engine. There was a message for a moment, but I didn't have time to read it. I started to bet on the battery because it's already 9 years of work. Fortunately, I have a CLIP, but after connecting it did not show anything except the saved errors of the STOP switch (foot brake), which I fixed two weeks ago. In addition, the manual module had three errors with 326 km / h as vehicle speed.
I looked at various parameters of the car and my attention was drawn to the voltage in the 15.4V installation on various modules. I confirmed this value with a multimeter on the battery. After a few minutes of engine operation, the voltage dropped to 15V.
I plan to replace the battery anyway, but I'm worried about the voltage in the installation. Now the question is, in this model, is the voltage regulator built into the alternator or is it controlled by the vehicle's computer?
The car is from 2008, petrol engine 2.0 (automatic).

It is built-in, additionally the voltage is controlled by the motor controller. If you have such charging, it is probably a scrap battery.

On the alternator.
Measure the voltage in the installation on the battery and on the alternator with a meter.

Thanks. I will replace the regulator and when the voltage is OK, I will insert a new battery.

I think you should first insert a new battery and then possibly replace the regulator. At least for the test. How will the charging voltage change. Did you measure the voltage with the battery dead?

The battery is not completely dead. The car starts somehow.
I connected the compressing engine to the jump-start for a moment, there is a gel battery there. The tension dropped a bit and after a second - two returned to its previous value. I have a working battery in the second car, I will also try to connect it with cables and check the voltage.
By the way, how do I check which module number fits my car?

sanfran wrote:

By the way, how do I check which module number fits my car?

What module? When it comes to the regulator, it's an old extract and buy the same.

Charging at the level of 15.4 is acceptable but it indicates a large current expenditure of the alternator and either the battery is weakly charged (you will not check it if you do not replace the battery with another one - connecting additional power sources in parallel to it does not change anything because they will load all the time charging system) or the regulator is actually damaged, but this will only come out during the alternator current tests performed with a working battery.

genek1000 wrote:

Charging at the level of 15.4 is acceptable

???????????

genek1000 wrote:

Charging at the level of 15.4 is acceptable but it indicates a large current expenditure of the alternator

You are wrong, buddy, and it's very much like PLN 400, i.e. quick and unnecessary battery replacement, such advice about the edge 3.

Current expenditure and charging voltage are two different things.

Strumien swiadomosci swia wrote:

You're wrong, buddy, and it's very much for PLN 400, i.e. quick and unnecessary battery replacement, such advice about 3

You see, everyone is right. I did not order anyone to exchange anything, just to test it to be sure. I'm not going to insult you like you do to me.
It is possible that I am wrong, but then the manufacturer is also wrong (he can also be wrong), so I suggest replacing one of the elements to be on
100% sure of diagnosis.

Practice shows that when> 15V packs, it warms up. Max is 14.8 in a few cars and not all the time. Replacing the regulator should help

Thanks for the entries.
For now, resolution of the problem has to wait until the weekend when it's light outside.
I will take the battery out of the UAZ - there is a two-year-old BOSCH fully charged - and put it in the Renewal and check the charging. And so I sat at the Scenic for a while on Sunday, repairing the driver's window motor, which stopped working at inappropriate times (cleaning the commutator, brushes and replacing the electronic module on the motor).
The Scenic runs very occasionally and for very short distances driven by Mrs. Sanfran.

Just out of curiosity - you drive UAZ around the islands

Yes. And I also take him to shows: