Fehler EPB Passat 3C | Posts 16+

Completion: HU (general inspection) passed this morning without any noticeable defects.

The circuit was measured. There are no errors.
In the EPB control unit, within the measurement data blocks, channel 12 displays the status of the parking brake.
The description states that the status must be set to "on" here.
Therefore, I am unable to program the EPB control unit.
How do I get the status of "zu auf auf"? Pressing the brake pedal firmly and pressing the button simultaneously did not produce any result.

Best regards,

Christian

Okay, I'm ready. Please provide the German text you want me to translate.

Hello, fellow DIY enthusiasts

Code:

--------------------------------------------------------------------------------                 Adresse 53: Feststellbremse       Labeldatei: DRV\3C0-907-801-53.clb    Steuergerät-Teilenummer: 3C0 907 801 E    HW: 3C0 907 801 E   Bauteil und/oder Version: EPB  VC8HC003   013 0003                  Codierung: 0010000             Betriebsnummer: WSC 05311 000 00000                       VCID: 24101DF443DBC007691-8070 4 Fehlercodes gefunden: 01087 - Grundeinstellung nicht durchgeführt             000 - - - Warnleuchte EIN 01042 - Steuergerät nicht codiert             000 - - - Warnleuchte EIN 01316 - Bremsensteuergerät             013 - bitte Fehlerspeicher auslesen - Warnleuchte EIN 00576 - Klemme 15             012 - elektrischer Fehler im Stromkreis - Warnleuchte EIN --------------------------------------------------------------------------------

.
I'm currently stuck on a similar problem.

While attempting to perform the initial setup, it crashes after a few seconds.
disconnect the connection to the EPB/FSB control unit. She only allows it after another...
Re-initialize the call from address 53.


History:
- The rear left FSB (brake stability system) was "defective" and has been replaced.
- No VCDS for learning/activation.
- FSB still didn't work.
- FSB control unit has been replaced.
- The ABS control unit has lost its coding as a result.
- No change in behavior.

Initial attempts at diagnosis (and my first contact with the vehicle):
- FSB control unit (53) not accessible when ignition is on.

- After activating the FSB (via button), the control unit can be accessed:

Code:

-------------------------------------------------------------------------------- Adresse 53: Feststellbremse        Labeldatei: DRV\3C0-907-801-53.clb    Teilenummer SW: 3C0 907 801 E    HW: 3C0 907 801 E    Bauteil: EPB  VC8HC003   013 0003    Revision:   013         Codierung: 0010000    Betriebsnr.: WSC 05311 000 00000    VCID: 24101DF442DBC0071F2-8070 5 Fehlercodes gefunden: 01087 - Grundeinstellung nicht durchgeführt             000 - - - Warnleuchte EIN 02443 - Bedienungsteil             012 - elektrischer Fehler im Stromkreis - Warnleuchte EIN 01316 - Bremsensteuergerät             013 - bitte Fehlerspeicher auslesen - Warnleuchte EIN 02435 - Steuergerät rechter Kanal Spannungsversorgung             009 - Unterbrechung/Kurzschluss nach Masse - Warnleuchte EIN 02434 - Steuergerät linker Kanal Spannungsversorgung             009 - Unterbrechung/Kurzschluss nach Masse - Warnleuchte EIN -------------------------------------------------------------------------------

What was particularly interesting was item 00576. The corresponding fuse is okay.
The voltage is present at the connector, but not really reaching the control unit.
The contact itself is missing the contact spring (or is broken, so that it doesn't...).
(Andruck mehr has). After some minor bending, it re-establishes contact.

Code:

--------------------------------------------------------------------------------                 Adresse 03: Bremsenelektronik       Labeldatei: DRV\3C0-614-095-C2.clb    Steuergerät-Teilenummer: 3C0 614 109     HW: 3C0 614 109   Bauteil und/oder Version: ESP 440 C4     H018 0001                  Codierung: 0010000             Betriebsnummer: WSC 61272 001 1048576                       VCID: 5BE266083F25BFFF6E8-800E 2 Fehlercodes gefunden: 01042 - Steuergerät nicht codiert             000 - - 01423 - Sensor für Querbeschleunigung (G200)             005 - keine oder falsche Grundeinstellung/Adaption --------------------------------------------------------------------------------

Remaining in the brake:

Code:

------------------------------------------------------------------------------- Adresse 03: Bremsenelektronik        Labeldatei:. DRV\3C0-614-095-C2.clb    Teilenummer SW: 3C0 614 109     HW: 3C0 614 109    Bauteil: ESP 440 C4     H018 0001    Revision:  H018       Seriennummer: 0668139734    Codierung: 0013602    Betriebsnr.: WSC 61272 001 104857    VCID: 5BE266083F25BFFF6E8-800E Kein(e) Fehlercode(s) gefunden. -------------------------------------------------------------------------------

After I found a suitable coding for the brake control unit...
After I had them, the sensors could be paired and all errors could be cleared.

Code:

------------------------------------------------------------------------------- Adresse 53: Feststellbremse        Labeldatei: DRV\3C0-907-801-53.clb    Teilenummer SW: 3C0 907 801 E    HW: 3C0 907 801 E    Bauteil: EPB  VC8HC003   013 0003    Revision:   013         Codierung: 0000012    Betriebsnr.: WSC 05311 000 00000    VCID: 24101DF442DBC0071F2-8070 3 Fehlercodes gefunden: 01087 - Grundeinstellung nicht durchgeführt             000 - - - Warnleuchte EIN 02844 - Lampe für Funktion automatisches Parken             009 - Unterbrechung/Kurzschluss nach Masse - Warnleuchte EIN 02434 - Steuergerät linker Kanal Spannungsversorgung             009 - Unterbrechung/Kurzschluss nach Masse - Warnleuchte EIN -------------------------------------------------------------------------------

The errors in the FSB control unit could be narrowed down to the following:




The power supply for the right channel is present, and the corresponding connector pins appear to be in good condition.
The two FSB engines have a resistance (measured from the control unit).
in the range of 3 to 4 ohms.

I'm slowly running out of ideas.

Best regards,
Micha

Hello Micha,

In my opinion, the error with the warning light is likely just a secondary consequence of the lack of power supply. The initial setup is probably also not possible without the power supply. Therefore, in my opinion, you should only focus on the power supply.

Your control unit says:

Quote:

02434 - Control unit left channel voltage supply.

You say:

Quote:

The power supply for the right channel is present.

I suspect it's just a typo, but just to be sure: Are both "Dauerplus" connections definitely connected to pins 13 and 15? Are both masses at 28 and 30?

Possibly, it might even be necessary to measure the values directly in the control unit (STG) to rule out any contact problems.
If it arrives at the control unit (STG), in my opinion, it's only a defective control unit.

Best regards,
Guste.

Hi Micha,

I haven't encountered that issue before. Do you have a schematic diagram?

Quote:

The FSB control unit has been replaced.

New or used? Are the motors in the brake calipers working properly and not partially stuck?

Best regards, Rainer.

@ Guste: Yes, it's a typo.
Both power supplies are present, and the corresponding fuses are okay.

@ Rainer: The original STG (steuergerät) has been reinstalled, as the replacement unit...
(used, from a recycling center) exhibited identical behavior.
Wiring diagrams are available.
The right motor is working normally (not disassembled), while the left motor...
is new (whether directly from the or from the local wholesaler, I would need to inquire).

A measurement in the engine control unit (ECU) will likely be necessary.

Best regards,
Micha