Audi A3 8L 1.6 2002R: Yellow Battery Light On Despite New Voltage Regulator & Charging

Question

Audi A3 8L 1.6 2002R patient.

The yellow battery on the on-board computer is burning (fis) and the climate control clocks are blinking, the radio sometimes dims.
Replaced the voltage regulator, the battery shows 12.8 at a standstill when charging 14.4.
Is it possible that the computer has an error and needs to be cleared? It comes after replacing this regulator does not read that it has been replaced?

Is there any other reason for this yellow battery?

helmud7543 · Answer

Something does not connect (maybe they did not tighten it during the repair), the battery is damaged or extremely worn (but then it would not have 12.8V at rest).
I am writing in relation to the symptoms, because what are the conditions for triggering the control, I do not know.

grala1 · Answer

There is no need to delete or learn anything there.
Check that the blue thin wire is connected to the alternator, and that it has not broken.
If it is connected, is it + 12V at the time of turning the starter, connect the light bulb between it and ground.
It looks as if the blue wire going from the meter to the alternator was broken, so the meter does not see that it is charging and the alternator excites itself at higher revs.
You can also connect the blue wire from the alternator to the positive on the battery for the test and then with the engine running, this indicator should go out as long as the wire is completely between the altar and the meter.

kajdasz27 · Answer

I checked and after connecting the bulb during start-up, zero current, only when the engine is running, there is current, the meter after turning the ignition switch shows 0.7V during start-up, still 0.7 and when the engine is already working 14.4

The second thing is connecting the blue cable from the plug to the battery +
And after the engine starts, we have a yellow battery on the computer.

Any other helpful advice?

Do I have to replace the cable from the meter to the alternator?

One more question, a thick black cable on the alternator is charging the battery, blue is information for the meter and I still have red (thin like the blue one) in this plug what is it?

Gerri · Answer

But why is this indicator YELLOW? This is for sure about the battery? Maybe fluid in the radiator?
I don't know Audi, but in Mercedes the customer added water in the battery to the plugs, and the yellow light was still on ...

kajdasz27 · Answer

This is what the indicator looks like, rather something downstream if there is a battery; D Does anyone have a description of the computer controls for the audi a3 8L?

Gerri · Answer

It has a plus and minus, it really leaves no doubt that it is a battery.

kajdasz27 · Answer

One more thing, where we have kilometers that can be reset, it is not displayed only by the inscription "sich"

If this battery does not light up, it normally shows kilometers.

In German it means "alone". This is what the translator shows because the car used to be from Germany.

helmud7543 · Answer

The author writes that the backlight in the cabin flashes. Flickering when the engine is running at idle speed means that something is wrong with the installation - this is the case with a worn (high internal resistance), heavily discharged battery (probably the author does not have it), a problem with the alternator or connections. What does the yellow light mean - maybe it says in the manual for this car, maybe it is related to the symptoms.

kajdasz27 · Answer

Aku is good, the charging is, the alternator is also working, the manual is in German and the German is weak, that's why I asked for a description of the controls

Gerri · Answer

These photos of yours are (sorry) but they only take up space on the server - they have no other use Sich can also be an abbreviation of the German fuse (Sicherung)

pusty20 · Answer

And that might be a good lead If this is not a problem on the alternator-meter line, and as the author says, everything else is OK, then I suggest looking for cold solders inside the meter and focusing on it.

kris8888 · Answer

A yellow battery light means the battery voltage is abnormal. It has nothing to do with the charging itself or the alternator.
Info taken from here: https://www.a3-freunde.de/wiki/FIS_Symbole_%C3%9Cbersicht

It looks like the battery isn't necessarily "good". What is the voltage at a standstill, one hour after turning off the engine? It should be no less than 12.6V. I understand that the clamps are clean and well tightened, the connection of the body with the negative of the battery is also good and reliable?

For a trial, I would replace the battery with another, functional one.

kajdasz27 · Answer

Tomorrow I will deal with it and describe what I got to, what the matter looks like.

Added after 13 [hours] 42 [minutes]:

All fuses are functional and not blown.

Battery immediately after engine stop 12.4
An hour later 12.4
Two hours later 12.4

So it's good for what it follows.

Clamps spotlessly clean, the masses are also cleaned and the problem persists ...

As for the replacement battery, it is a difficult matter because there is no place to borrow it from .... That it would be similar in parameters.

kris8888 · Answer

Then check the voltage in the installation when you turn the starter. But not the voltage directly on the terminals, but somewhere in the installation, e.g. in the cigarette lighter socket. It will be known if there are too large drops somewhere on the connectors and cables and if the battery is in good condition.

rosak · Answer

This message means that the voltage on T30 (pin 23 in the blue battery connector) is below about 9V. If you pasted a picture of the entire meter, I would tell you whether it was his fault or the installation (if the voltage is really low, the meter barely lights up, you can see it). If it's Jaeger, I say it's damaged, if VDO (which I doubt) measure the voltage.

Added after 14 [minutes]:

Added after 10 [minutes]:

Now I just read the rest of the thread. Your "SICH" stands for "Sicherung" which means fuse.
It's about fuse no.15 (at least in the Audi TT, the meter is the same, but I do not know if the fuse is) but it is not damaged, see here:

edek-69 · Answer

[is your job the same control?

Ireneo · Answer

Heat the motorola in the meter and see if anything changes

rosak · Answer

Same as ...? The thread is almost 2 years old, we don't know what you are asking because what about the original question has already been explained. Nothing will change because the skein is working.

edek-69 · Answer

Same as ...? The thread is almost 2 years old, we don't know what you are asking because what about the original question has already been explained. I am asking if in your opinion the photo of the control I put in means the same problem? what controls pasted by predecessors. Mine is quite unusual. I did not come across it in any service book or on the net

rosak · Answer

Exactly 1 post above yours, I explained what this message means, I even demonstrated it in the video. Added after 1 [minutes]: You were poorly looking for something. It is in the user manual and all google search results ..

ZidaneNS · Answer

Hello, How to repair such a counter? What is the cause inside the counter? Cold February? Rotten paths? Thank you in advance for your answer.

Audi A3 8L 1.6 2002R: Yellow Battery Light On Despite New Voltage Regulator & Charging

Post #1

Post #2

Post #3

Post #4

Post #5

Post #6

Post #7

Post #8

Post #9

Post #10

Post #11

Post #12

Post #13

Post #14

Post #15

Post #16

Post #17

Post #18

Post #19

Post #20

Post #21

Post #22

Topic summary