Seat Altea horn not working, cruise control (Solution)

Hello,

I have a problem: the horn isn't working in my 2004 Seat Altea, which has multifunction buttons on the steering wheel.

The buttons on the steering wheel are not working, and neither is the cruise control.

I replaced the slip ring, but unfortunately, that wasn't the problem.

Has anyone else experienced this?

The error log stated:

01426 Steering wheel control unit (E221)
004 - No signal / communication.

Keyboard and/or steering column - control unit defective. It seems like this is a known issue with Seat.

There was reportedly a recall issued for several models.

The error may also be fixable with a software update.

That's where I would start. That can only be done by the .

Is there anything that can be checked on the keys?

Or, specifically, on the steering column bracket?

I have reviewed some market-weighted benchmarks.

GRA is working.

Horn: Activated/Not activated = Always remains in the "Not activated" state.

Steering wheel-mounted MFA buttons = no change in VCDS.

I have now ordered the part, because the MFA buttons are a factory order.

The problem was with the steering wheel buttons.

When the horn was activated, I detected a connection through the slip ring at pin 7 of the control unit (ground was connected, which I don't understand yet – if there's a ground connection, why doesn't the control unit switch on?).

By pressing the horn, ground is connected to pin 7, and the signal is also sent to control unit E221. This control unit then relays the "horn" signal via the LIN bus to the steering column control unit, which in turn forwards it to the vehicle's main control unit. The vehicle's electrical system activates the horn via the 449 horn relay.

Did I understand that correctly?

Why make it simple with a horn contact and a relay, when you can make it complicated.

Thank you for the feedback .

Quote:

Why make it simple with a horn contact and a relay, when you can make it complicated.

With that:
- Cost savings - this stuff is really cheap.
- The has as much to do as possible, while the free ones have as little as possible.
- A portion of the cross-subsidization flows back through the electricity grid.
- so that the cost of repairs on older vehicles for even minor repairs can exceed their market value.
- to support exports to Eastern European countries, which consequently leads to an increase in insurance premiums.
because somewhere, those cheap replacement parts have to come from.
- to ensure that as many new cars as possible reach the dealerships.

In addition, a further price decrease is triggered because cars older than 5 years with over 100,000 km on the odometer are ticking time bombs in terms of potential repairs.