Audi A6 C6 2004 2.4 Petrol - ABS/ESP Lights On: Error Codes P1653, P0571, 00526, 01502, 01316

Hello!

The problem is with the car

Audi A6 C6 2004 2.4 petrol

A few days ago, while driving on a paved road, information appeared on FIS

1. "parking brake malfunction"
2. ABS / ESP Fault see owner's manual

In addition, the sound signal and the ESP lights are on as if it was turned off and yellow from the brakes

Since then, the error appears notoriously after driving a few meters, but recently I covered 3 long routes of about 140 km, one and the error did not appear, later I covered a few short routes in 3-4 days and nothing, then it came back again.

After connecting the diagnostic cable, the following errors appeared:

P1653 Read DTC memory of
ABS CM, Implausible signal, static
P0571 Cruise/Brake Switch (A) Circ.
Malfunction, Implausible signal, static

00526 Brake light switch
Implausible signal, intermittent

01502 Left rear fog lamp bulb (L46)
Open circuit/short circuit to ground, static

01316 Brake control module
Please read DTC, intermittent

02273 Static current stage 2
interim

02276 Static current stage 5
interim

01964 Memory Seat Control Module / steering column adjustment (J136)
No signal/communication, intermittent

00470 Combination comfort databus in single wire
Open circuit, static

I am a user of the audi a6 forum, after analyzing the problem, most would bet on the abs pump control module, but after contacting one company dealing with the repair of this module, you said that the problem will lie elsewhere. There are many similar topics, but none of them give the slightest hint of a solution to the problem :(

I am asking you for help! Maybe someone can tell me where to look for the problem

I will add that there are no problems with braking, everything works fine, only the information on the fis

At the beginning, I will ask you to check if the plugs are not "green"
Then VCDS and logging into the engine - do they see each other.

What are you diagnosing it with?

Besides, I understand, you deleted these errors and checked what was left?

A moment ago I turned the ignition and the information showed that the battery is discharged and I have to start the car and wait 3 minutes after entering the battery charge state in the MMI showed that the battery is full.

I check the car with the autel diagnostic device and with the cable via the carport program (I bought the cable yesterday and it turned out that it does not work with other software, so VAG is not available at the moment, only tomorrow when another cable will arrive)

After erasing the errors and driving a few km, the error persists

On the engine:
P1653 Read DTC memory of
ABS CM, Implausible signal, static
P0571 Cruise/Brake Switch (A) Circ.
Malfunction, Implausible signal, static

And on the brakes:
00526 - Brake Light Switch (F) Sporadic

Added after 1 [minutes]:

ps. in autel OBDII does not show errors only Audi/VW shows the two above

Have you checked the Brake Light Switch (F) Sporadic??

Well, I don't know what it is, I checked all the fuses, I undressed the rear wheels, I checked the pins, plugs, I plan to do the same in the front

Added after 7 [minutes]:

I found something like this but I can't locate which plug it is on the net :)

00526 - Brake Light Switch (F): Circuit Malfunction
Possible Symptoms
MIL (Malfunction Indicator Light)
No Brake Lights
Possible Causes
Wiring and/or connections faulty between Brake Switch, Brake Lights and/or ABS Controle Module
Brake Light Switch (F) damaged
Brake Light faults
Fuse(s) faulty
Possible Solutions
Check wiring and connections
Replace Brake Light Switch (F)
Check / Replace fuses(s)
Check/Replace Brake Lights
Check Brake Light Switch (F) in ABS Measuring Block
Special Notes
FAQ 2.7. Many Automatic Transmission Control Modules will show a DTC 00526 or 17087 that indicates a faulty brake light switch. This can be ignored and will not appear if you press the brakes once before checking for Fault Codes.

Added after 35 [minutes]:

I removed this contact, it looks like it has 3 positions in the photo

Have you tried to replace? Or re-set?

There are no replacements from anyone, but now the question is which of the 3 options is the right one ... when I pulled it out, this rod was extended to the max when I tried to move it as if the gear (Sound) tried and went down. It can be moved but when I press it, it falls to the bottom and comes back on the spring only a little

Added after 5 [minutes]:

Unfortunately, I can't capture the video only with the photo

Inside there is a blue dinks, as he regulates these positions, he moves from right to left, moving forward more and more

Szatan00 wrote:

Well, I don't know what it is

Are you a mechanic?

Without exaggeration But I can do what not what to do myself now mainly depends on the location of the problem. A lot of people wrote that it was 99% abs control module, the cost of checking PLN 50, repair PLN 350, new PLN 7,000, sending the module back, no one will give me a guarantee that it was actually broken, they will send it to me and it turns out that it is not that and you have to pay PLN 350 so I try I want to eliminate small things so that I want to be a little more sure that it's not this module

There's someone in my town who does this.
You will find it on allegro.

Even two companies, one said it will be and the other said no

Where are you from?

Cracow area currently Frankfurt

Pull this disk to the max and press the brake pedal to mount the sensor in its place. Check if the feet work and if the work of both sensor circuits is visible in the diagnosis. Or just replace it. They pounce like tabby cats.

The lights work as they should, but I ordered a new one tomorrow I will replace it and see what will be the effect I will clean it for now and an extra red brake light has appeared Breaking the head ... Still, it all came down to this switch but can it really be the culprit of all these errors?

Added after 2 [hours] 8 [minutes]:

Gentlemen, ending this beautiful day under the garage...

02446 Drive, mechanical malfunction
Faults, intermittent

00526 Brake light switch
Implausible signal, intermittent

01826 Steering Angle Sensor, voltage supply terminal 30 (G85)
interim

It goes normally...

The battery goes crazy on the MMI shows full and on fis that the battery is discharged and the car starts after the 5th attempt

Added after 5 [minutes]:

this 02446 is a changer, probably something got mixed up with the battery, this switch will be replaced tomorrow and 01826 is supposed to disappear after some time after replacing this switch, however, there will still be messages when I replace it, I'll let you know

I'm after replacing the brake light switch, on the way to the shop in the morning abs / esp was shining informing all the time that there is a problem after the replacement I drove and nothing appears (with my luck lately it's hard to believe) you think that the errors described in the first post could cause this small switch?

It's hard to believe, I'll go again and see if the problem actually disappears, it's not my first Audi, that's why I'm always looking for an alternative solution than the service, the more that sometimes it just turns out to be crap, unfortunately, electronics shows a million other elements and a person goes crazy I'll let you know in the evening if the error still appears and I'll check the car thoroughly with a vag, I'm waiting for a new cable

Buddy, go to someone who has oe VCDS or buy one yourself on the adako website.
You won't get far with cheap kklaki..

I bought a good cable, unfortunately the previous one (I didn't read it) works only with the CarPort program and therefore I am forced to send it back and this one will arrive today, so the fun is ahead of me

You don't understand what I'm writing.
For vehicles from the VAG group, you need a program such as VAS, VCDS.
If you want to fix this car, start there. If not, take it to the workshop. Why make life difficult for yourself, since there is a lot of information about these programs about diagnosis, coding, etc. I will not mention the support of rosstech or adako itself.

Added after 1 [minutes]:

Alternatively, install the free TEAMVIEWER program, connect to the car and enter the code. I want to see for myself what is in this car, before we get to the cause, we will litter the topic that may be useful to someone.

In fact, I do not understand, you helped me to a large extent, the switch is replaced at the moment, no controls on the fis, as for the cable, as I wrote, I bought the cable from the carport program demo, the program is quite interesting, but apart from checking errors, I can't do anything else because 1 This is a demo 2. The cable does not work with other software. So I bought a different cable and only I will be able to make logs and delete errors

Added after 8 [minutes]:

I know the rules of life on the forum, that's why I wrote that I have to wait until the evening until I can check the car properly, but with this teamviewer, a good option, unless you have skype, it would also be a solution

Szatan00 wrote:

I bought another cable

What ? Pass it accurately.

Szatan00 wrote:

but with this teamviewer, a good option, unless you have skype, would also be a solution

I have skype too.
When I have something to do, we'll think about it,