VW / Audi Komfort CAN | Posts 16+

muurman wrote:

id 531h 11h = left turn signal. 12h = right turn signal. 40h = brake 51h = brake light + left turn signal. 52h = brake light + turn signal right

Here are my findings while developing a custom LED "flow" turn signal for my Audi A4 (8E).
531 has 2 bytes.
b1 = headlights (haven't really looked into this one).
b2 = blinker, among other things.

byte = 8 bits.
bit 1 => 1 - left turn signal.
bit 2 => 1 - right turn signal.
bit 4 => 1 - turn signal on, 0 - turn signal off.

Here are a couple of values I've observed from my device:

Alternatively:

I've noted the following values from my device:
Here's the translation:

"The reasons for these differences might include situations like activating the brake lights while the turn signal is also engaged."
Left turn signal active: 0x11, 0x51, 0x91, 0xD1.
Left turn signal OFF: 0x01, 0x41, 0x81, 0xC1.

The right turn signal follows the same structure; simply check the second bit to determine if it's on (0x12) or off (0x02).

Warning light.
0x1B as ON.
0x5B as ON + brake lights.
0x9B as ON + OEM DRL.
0xDB as ON + OEM DRL + brake lights.

"Subst. 0x10 to disable warnings."
0x0B as OFF.
0x4B ... turn signal + brake lights.
and so on.

I might be able to help you. I have an Audi S3 8L from 2003 that also uses CAN bus technology. Our cars are from the same generation. I've decoded some IDs...

svenni wrote:

Hi, I'm very interested in getting some information. I own a Volkswagen Golf IV from 2003, which already has the Comfort CAN bus system. It has a combination instrument panel with the large navigation display, and I would like to modify the following things via the CAN bus: - Add a menu entry to the MFA (Multi-Factor Authentication) menu. - Displaying arbitrary text and potentially graphics on the screen. I just want to add a few features, like displaying the oil temperature and intake air temperature. Unfortunately, my car's navigation system is still connected via 3G, which means I can't log the CAN bus data. Can you help me? Thank you and best regards, Sven

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