Altea XL Osram LED parking light bulbs

Hello!

"Does anyone know why my car (a 2013 AlteaXL 2.0 with 140hp) is giving me a warning message about the lights, even though I'm using LED sidelight bulbs from Osram?"
I've also already tried a new pair [of something], and the headlights are also new...
The error is always on the right side.

Can the value for the test voltage be reduced?

Best regards,
Andi

Autoscan?

Sorry, yes.

The problem only occurs when the Osram bulb is installed; everything works fine again when I use a regular bulb.

andi_j wrote:

Sorry, yes. Fehler besteht aber nur, wenn die Osram drin ist, wenn ich die normale reingebe ist wieder alles gut..

Oh yeah, and the Osram bulb is still working normally despite the error...

What is considered the "standard" - an LED from a different manufacturer or an incandescent bulb?
hg
Herbert.

Does the LED come pre-installed from the factory?

No, halogens.

Herbert wrote:

What is the "normal" one? Is it an LED from a different manufacturer or an incandescent bulb? hg Herbert

.

I consider halogen headlights to be the standard because if they're xenon or LED, people always mention it specifically.

And if you're now wondering how a battery management system (BMS) could detect a faulty consumer, a reduced current flow might come to mind as a solution. A 12V/5W halogen bulb draws almost 0.5A. Do the LED replacements also draw that much?
hg
Herbert.

Yes, I understand that already.
However, the design of these lamps from Osram is intended to prevent that from happening.

Now I would like to know if it is possible to recode the checksum value.

Hi there,
Perhaps you could share the specifications for your static lighting LEDs (datasheet, not marketing claims) sometime.
Generally speaking, the Altea seems to use incandescent bulbs for the daytime running lights, regardless of the headlight type. That's why I doubt you'll find any adjustment options. However, the threshold for the error should be the same on both sides. Therefore, your statement that the error only occurs on the right side is surprising.
What happens if you only install the LED lamp on the left side for testing purposes?
What you can do is go through the adjustment channels of the STG 9 and also post an image of the STG here.
hg
Herbert.

Naja, das Bordnetzstg verwendet dort IC Treiber, um die Lampenausgänge anzusteuern. Diese sind so spezifiziert, dass sie einen Stromfluss von Glühlampen sicher erkennen. Die LED zieht eben wesentlich weniger Strom. Aincluding those from Osram.

The driver is designed for, for example, 5W incandescent bulbs. Typically, it probably detects the current flow starting around 1W, but in the worst case, it might only detect it from 2W. The Osram LED likely falls somewhere in between, perhaps at 1.9W. (All numbers are examples and may be arbitrary).
"It usually works, but if the driver IC is at the upper end of its tolerance range, then you'll get an error message. And that current limit is almost certainly hard-coded in the hardware of the driver IC and not adjustable. (The output stage doesn't report a specific current value to the microcontroller; it only indicates whether the current is above or below a certain threshold.)"

Was kannst du nun tun? --> Den Stromfluss künstlich leicht erhöhen. In meinem Zahlenbeispiel oben würden dir 0,1W zusätzlich reichen. Also ein paralleler Widerstand von 12V*12V/0,1W = 1440 Ohm (=1,5kohm). Ob das bei dir ausreicht, musst du probieren. Alternativ Widerstand halbieren, bis die Fehlermeldung gerade so ausbleibt (aber mit abgezogener LED noch funktioniert). Ich würde mal mit einem 1k Ohm Widerstand und 1W starten. Just order a pack of five of them online and then keep switching them around until the error message disappears.

Regards,
Sure.

Here is the translation of the text from German to English:

"Guste" means "gust" in English. It refers to a sudden and strong gust of wind.

Hello everyone again.

Thank you for the explanations and your time!

Okay, it seems like I can't change the test values based on what I'm reading now, so I guess I'll have to try using the resistance method.

Best regards, Andi.

Here's a question from someone who knows nothing about Volkswagens: Is it possible to "disable" the bulb failure monitoring system?

Hutfahrer wrote:

Mal 'ne Frage von 'nem VW-Unwissenden: Könnte man die Glühlampen-Ausfallüberwachung ggf. "ausschalten"?

It only applies to certain body control modules in some models for certain lamps.

Since it's a PQ35 vehicle, there is already the possibility to directly adjust the configuration in the EEPROM to disable the cold and warm diagnostics (i.e., the detection of lamp failures during ignition on - cold diagnosis - and during operation - warm diagnosis).

In your BCM, you will likely only find a drop-down menu in Byte18, and I wouldn't recommend making any changes there. If something goes wrong with a change here, you need to contact , who can fix it for you.



Unfortunately, it's not possible to achieve this using VCDS.