Are there training simulators available?

I actually find the topic really interesting. Now, my car doesn't have a CAN bus, and I'm not even sure if I would try it out on it, even if it did.

Does anyone know of a (motor) control unit that can be purchased at an online auction - preferably at a low price? And also with the correct pin configuration?

I would recommend checking out an AI system from Audi or VW. You'll be able to see how your commands affect the CAN bus in the best way there.

I have a mini CAN network set up on my desk, consisting of an A4 B6 instrument cluster, an Audi RNS-E, and a small wiring harness that is powered by an old PC power supply. It even has a standard OBD connector for VAG-COM, as well as several ISO/Mini-ISO connectors for powering other devices and providing CAN communication.

With this setup, I can read the data packets between the radio, the onboard computer (KI), and whatever else I have connected fairly well. What I can't do yet is to interpret the information displayed on the FIS (Instrument Cluster) because it only shows error messages related to things like incorrect oil pressure, ABS, and so on. Also, I don't have a steering column control unit, so I can't clear the error messages (if that's even possible with the red error codes). At least it's not annoying anymore now that I've disconnected the buzzer.

So, if AI is involved, maybe it's better to use an older version of the B5 system that can handle CAN communication, but doesn't rely on CAN for everything. Is there a way to fix the issues and thus be able to fully enjoy the FIS (presumably referring to a specific system or event)?

Regarding the steering wheel lever, I simply used three buttons.

23 above.
24 below.
25 reset.

simple vs. mass.

and you can operate the instrument panel.

Simply add '+' to the coolant level warning light, and '-' to the brake light, and some of the main errors will be gone.

Interesting. I couldn't find these terminals in my wiring diagram, and since the other wiper lever contacts are also connected to the steering column control unit, I assumed that these ones are connected there as well.

Are the connectors 23/24/25 compatible with the A4 B6 instrument cluster? According to the pinout, I have:
- in the blue connector:
23. Oil level / oil temperature.
24 Self-leveling suspension.
25. Menu switch (enter).
- and in the green connector:
23 AWG wire.
24 CAN-Bus drivers (display).
25. Tank flap switch.

Regards,
Sure, here is the translation of the text from German to English:

'Dirk'

At the green socket.

The pin configuration should be almost identical to that of VW dashboards.
Do you still have the gray connector on your FIS (fahrzeugintegrierte System)?

Then it should be resting on the gray connector.

Sure, here is the translation of the text from German to English:

'Cu' is a Spanish word that means 'with'. It is often used in greetings and farewells. For example, you might say 'Hola, cu' to someone you are greeting, or 'Adios, cu' to someone you are saying goodbye to.

'Cu' can also be used as a verb, meaning 'to be with'. For example, you might say 'Estoy con mi familia' to mean 'I am with my family'.

In some cases, 'cu' can also be used as a noun, meaning 'a companion'. For example, you might say 'Ella es mi cu' to mean 'She is my companion'.

I hope this helps!

Unfortunately, that gray connector is only available for the A4 B5 and A6 C5 models.

Then, onto the Green.

Take a look at the schedule and compare it to yours.

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Sure, here is the translation of the text from German to English:

'Cu' is a Spanish word that means 'with'. It is often used in greetings and farewells. For example, you might say 'Hola, cu' to someone you are greeting, or 'Adios, cu' to someone you are saying goodbye to.

'Cu' can also be used as a verb, meaning 'to be with'. For example, you might say 'Estoy con mi familia' to mean 'I am with my family'.

In some cases, 'cu' can also be used as a noun, meaning 'a companion'. For example, you might say 'Ella es mi cu' to mean 'She is my companion'.

I hope this helps!

A4 and Golf seem to be quite different. According to the repair manual, the following parts are used:

Blue:
Washer fluid low.
2-Coolant level low.
3-Fuel gauge sensor.
4-Coolant temperature
5-Push button circuit 2 Navigation system
6-Push button circuit 3 Navigation system
7-Button circuit x Telematics.
8-menu switch.
9-Vacant
10-way front hood switch.
11- Fuel gauge sensor 2
12-Menu switch (Out A)
13-Vacant
14-Vacant
15-Vacant
16-FDR/TCS (= ESP)
17-Convenience CAN-Bus High.
18-Convenience CAN-Bus Low.
19-inch infotainment system, CAN-Bus low.
20-inch infotainment system with CAN-Bus connectivity.
21 - Ambient temperature (input)
22-S contact.
23-Oil level / oil temperature
24-Self-leveling suspension.
25-Menu switch (enter)
26-Vacant
27-Vacant
28-Menu switch (Out B)
29-Vacant
30-Transponder 2.
31-Transponder 1
32-Terminal 31 (sensor)

Green:
1-Terminal 58d
2-Terminal 30.
3-terminal 15.
4-Vacant
5-Speedometer (input)
6-Speedometer (output 2)
7-Airbag (inverted)
8-way turn signal (right-side)
9-Brake fluid low.
10- Turn signal (left-side)
11- Turn signal (trailer)
12-Powertrain CAN-Bus Low.
13-Powertrain CAN-Bus High.
14-Terminal 61 (generator charge warning)
15-Vacant
16-Oil pressure 2
17-Terminal 58s
18-Terminal, 31-load.
19-Terminal 31 load.
20 - Vacant.
21-speed speedometer (output 1).
22-ABS warning.
23-gauge wire.
24-CAN bus interface (display).
25-gallon fuel tank flap switch.
26-CAN Bus diagnosis - Low.
27-CAN-Bus diagnosis (display)
28-CAN-Bus diagnosis - High.
29-HRC (headlamp range control)
30- Safety belt buckle.
31-External buzzer.
32-Brake pad wear.

The menu switch in the blue connector is for the small navigation system, but not for the FIS (multifunction display) switch.

Oh man, I've seen some older schematics that were very similar.

That is rubbish .

In the Audi A4, the control of the lever system is handled via CAN. Unfortunately, there's no way to control the onboard computer using just three wires. You'll need to obtain a steering wheel control unit that's compatible with the lever system. However, be aware that there are differences (some have an onboard computer, and the GRA [likely referring to a specific feature] is probably an optional feature).

Hello everyone,
I'd like to ask a quick question here to avoid opening a separate topic, as it's essentially about addressing individual control units when they're disconnected (in a lab setting).
Can I do that with the CAN-Hacker?
Connect 12V to terminal 15 and ground to the control unit to power it on, then connect CAN L and H to a CAN interface. The initial goal is to determine if the control unit is functioning and capable of sending data. Is a Polo 9N control unit for power steering?
Thank you for your help.
Best regards, Mario.

Theoretically, yes, but practically... I'm not sure.

Speak. It seems to be working. It's possible that it's listening to the bus and expecting certain signals. If they don't come, it will eventually go into sleep mode or something like 'bus off' mode.

But someone here can definitely help you with that.

You just need to know how to communicate with him. Once that's clarified, I think it will work .

Hello and thank you for your reply.
Okay, so I've set up a small lab setup: a Golf 5 gateway with an OBD socket, and the steering assist control unit from a 9N connected to it. I could only access the gateway using VAG-Com. No communication with the steering assist control unit.
'So, I managed to get a Polo body control module (BCM), but it's supposed to have a fault (the wipers are intermittently activated). It has the gateway integrated. Unfortunately, I couldn't get it to connect to the VAG-Com (I tried all the connections according to the SLP), so it's not working... There's nothing I can do about it. That means I can't access the steering control module through it either. There might be more things broken than described... And that's why I had the idea of simply connecting the steering assist control module to the CAN-Hacker and seeing if anything happens.' Because who knows if the control unit itself is faulty? I bought it used, so I don't have any proof yet that it works.
That's why I'm asking. What should I do to address it? Is there perhaps a routine for a self-test of a storage device?
I'm a complete novice when it comes to electronics, so please forgive me if my requests seem unrealistic, but I would be very grateful for any tips you can offer.
Best regards, Mario.

You can, of course, also connect CAN-Hacker devices directly to the control unit.

Best regards,
Okay, hier ist die Übersetzung:

'Vlad.'

Hello,
'I did exactly that yesterday, and the control unit displayed 'Life'. CAN-Hacker showed two lines; one counter was increasing very quickly, while the other was increasing less quickly...' Therefore, it was clear that it wasn't broken.
According to information I received, the issue likely relates to the transport protocol, as I am unable to access the power steering control unit of the Polo 9N through the Golf 5 gateway. The Golf has a TP 2.0 engine, while the Polo has a 1.6 engine.
Okay... now I've connected the CAN bus of the control unit to the drive-train CAN bus of the Golf 5. Engine started, and look what happened!!!
The pump has started! That's very interesting. The gateway cannot establish communication, but the speed information on the drive's CAN bus appears to be identical, and the steering system seems to understand it... Now I just need to find a way to perform the diagnosis...
Best regards, Mario.