Skoda Fabia 6Y: Ladekontrollleuchte geht nicht (an) (GELÖST) | Posts 16+

12-05-2011, 3:25 Subject:

Mulle, why do you always have to ruin my mood before going to bed?

...the thing about the 11V and then only 13.8V after increasing the RPM is making me a bit concerned right now...
So far, there has been no complete system failure of the AI, even with VKM (which is the company's internal designation for the woman with the (curiously) long nose).

Before the mares with the (small) udders get spooked, I should probably check the D+ line to the BNStG or take a look at what "auditom" sent me via private message.

I will report

.

Best regards from Munich!

12-05-2011, 6:37 Subject:

DieselBär30x wrote:

...the thing about the 11V and then 13.8V only after increasing the RPM makes me a bit concerned right now...

Why? This is the classic "self-starting" behavior of an alternator without external excitation, as mentioned above.
Everyone can test it themselves by disconnecting the controller plug, starting the motor, and then slowly applying the throttle while monitoring the on-board voltage.

Guest Free account, no CAN development support

The effect is not normal like this.

It was never like this before, but it was perfectly normal for years. It starts at around 13.8V and the voltage slightly decreases with engine speed. We're talking about a Polo with technology from 1999. No modern car

12-05-2011, 16:21 Subject:

Hello everyone!

According to. Mulle's description of the Polo mentioned that the battery was drained after a few days.
While I don't think the engine was running at idle for that entire time

.
That makes me think, especially if there are similarities or potential similarities to the Fabia.

Best regards from Munich!

12-05-2011, 16:34 Subject:

mullemaus wrote:

This effect is not normal.

It has never been like this before, but it was perfectly normal for years. The starting voltage is around 13.8V, and it decreases slightly with engine speed. We are talking about a Polo with technology from 1999. No modern car

Sorry, by "normal" I meant the reaction of the (even if intact) alternator to the defect of the missing pre-excitation

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dieselschrauber · 30-05-2011, 20:10 Subject:

Hello everyone!

auditom wrote:

Hello Dieselbear,

Look down below, near the starter; there are several cables plugged in, including the cable for the charging control. There are 2 cables in the connector. Try pulling on all the cables, and then unplugging and replugging them; in 99% of cases, the problem is located here. ...

...and he was exactly right with his 99%

.

The connector in question is located behind the cooler on the left side.
It appears that this connection point has been modified before, as the connector with its two yellow wires is connected to the original D+ (blue) and DF (brown/red(?)) cables coming from the motor wiring harness using crimp connectors.
The current problem was caused by incorrect installation, which resulted in chafing on the repair line. If the yellow pipes had been properly cut to length and not twisted into a loop and stuffed away, the D+ cable wouldn't have been able to rub through in TWO places simultaneously.

Attached are self-explanatory images.

For troubleshooting, I can now confirm that the BNStG (likely an abbreviation for a specific system or component) provides battery voltage on the D+ line when the ignition is ON, which allows for easy measurement. However, the 12V is also present at the DF connector, which initially led to some confusion for me.

Thank you very much (also on behalf of VKM) to everyone for your help, and especially to auditom!!

Best regards from Munich!

31-05-2011, 20:54 Subject:

If you don't do everything yourself, right?!

Thank you for the feedback.

31-05-2011, 22:20 Subject:

Hey dude!

...as vwSchrauBär so aptly put in his profile:

Quote:

Do it yourself - instead of shoddy work at the workshop

Best regards from Munich!

Guest Free account, no CAN development support

Everything has been checked on this Polo

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01-06-2011, 22:45 Subject:

Hey Mulle!

(Official-) Proposal:
If you bring yourself and the Polo to the meeting, I'd be happy to stick my (slightly alcohol-influenced) interruption-seeking probe into your wiring harness

.

Best regards from Munich!

EDIT:

mullemaus wrote:

... Funny: Ignition on, after 2...3 seconds, ALL the lights go out. AI looks like a key in a pocket

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In VKM's Fabia, the engine warning light illuminates on the instrument cluster and remains on until the engine starts! *note*
Mulle, what kind of engine variant is the Polo?