Hi,
I driving passat TDI b5.5 2005 AVF.

I having following messages:

16955 - Brake Switch (F): Implausible Signal
P0571 - 35-00 - -

17087 - Brake Switch B Circuit Malfunction
P0703 - 35-00 - -

00526 - Brake Light Switch-F
36-00 - Open Circuit

I changed brake light switch, and still having same errors.
I checked engine "Measuring Blocks" 006, at field 2 were it stated Brake Pedal, i have 01 when brake pedal not pressed and 11 when pressed.

Brake tail lights are not lighting, but light which located at rear window is working when brake pressed.
What should i do?

Best regards.

 

EOBD II Error Code: P0703

Fault Location:
Brake Switch (F) - Electrical Malfunction

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
Brake lights inoperative.

Wiring/Connector(s).
Brake Switch (F) faulty.
Misadjusted Brake Switch.

Possible Solutions:
Check/Replace all faulty Wiring/Connector(s).
Check/Replace Brake Switch (F).

Special Notes:
When found in Vehicles with Drive-by-Cable (DBC) the Brake Switch (F) is connected to the Transmission Control Module (TCM) (J217). On older Models this Code is stored automatically after Terminal 15/Ignition is switched ON. If the Brake Switch (F) is OK you can avoid this Fault Code by pressing the Brake Pedal after switching on the Ignition and prior to checking Fault Codes. The Code should automatically be cleared then.
When found in Vehicles with Drive-by-Wire (DBW) the Brake Switch (F) is connected to the Engine Control Module (ECM) In this case you should check the Engine Control Module (ECM) for Fault Codes as well and the Data Bus Wiring/Connector(s) between Engine and Transmission Control Module (TCM) (J217).

Tech Notes:
Check if the stop light works with the brake pedal, if the brake lights are inoperative, replaced or adjust the brake switch.

Description:
Engine Control Module (ECM) detected accelerations and decelerations with no brake switch change.
Fault Location:
Brake Light Switch (F) - Circuit Malfunction/Open Circuit

Possible Cause:
Malfunction Indicator Lamp (MIL)(K83) active.
No Brake Lights.

Brake Light Lamp: Left (M9) or Brake Light Lamp: Right (M10) malfunctioning.
Fuse(s).
Wiring/Connector(s) faulty between Brake Switch, Brake Lights and/or ABS Control Module (J104)/Brake Electronics Control Module (J104).
Brake Light Switch (F) damaged.
Brake Light faulty.

Possible Solutions:
Check/Replace Fuse(s).
Check/Replace all faulty Wiring/Connector(s).
Read Measuring Value Blocks (MVB).
Replace Brake Light Switch (F).
NOTE: The brake light switch must be adjusted exactly.
Check/Replace fuse(s).
Check/Replace Brake Light Bulbs.
Check Brake Light Switch (F) in ABS Measuring Value Blocks (MVB).

Special Notes:
Many Automatic Transmission Control Modules will show a Diagnostic Trouble Code (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.

As taken from my https://volkswagenforum.com/forum/ge...oftware-34973/

https://volkswagenforum.com/forum/ne...gnature-34185/

 

Hi Keith,

Thkx for replies, i will change the bulb lights today.
I noticed that green icon near the gear stick "Press brake pedal" not lighting any more.

Best Regards.

 

Hi,

I solve it, just replaced 2 brake light bulbs.

 

That was a cheap fix.