ABS causing many issues, cannot fix so far

[Kieran_2]

Hello everyone, this is my first proper post outside of the Newbie section. Im mostly certain that this type of issue hasn't been discussed on this page before but I apologise if it has been. So I have a 2011 mk6 golf 103TDI, and its got an issue. It started probably a year ago ish and has slowly worsened, I am having an issue with my abs which triggers an engine fault, then the power steering, speedo, and then the fuel gauge to bounce/ move around.

To get into the details of the issues,

• the traction control, abs, and stability control lights come on as well as the hand brake light flashing, on the dash screen it says brakes error workshop
  
• the glow plug light also flashes as well as the engine light on too
  
• most of the time the steering light is on as well, indicating the power steering is out, this sometimes does go out but is getting more and more rare
  
• additionally and this is the part I find most odd, the fuel gauge moves, eg. when I put my foot down, or am on a hill the gauge is in the incorrect spot and bounces around

It initially started with the abs lights coming on rarely, and I'd power cycle the car and they would go. This progressed to them being on constantly but only going away once the engine was at temp. then power cycled, this solution did however slowly stop working and it is now at its current point as described above.

what I've replaced,

• all four abs sensors ( though cheap eBay ones I wanted to prove that they were not the fault, which is has been confirmed that they are not)
  
• all abs, and stability control related fuses and relay
  
• the multi/ central fuse on the side of the fuse box ( replaced today, did a test drive and the speedo came back only after power cycling, all other issues remain)
  
• battery has been tested, grounds have been checked and abs module connections have been cleaned

With all these issues the car still drives fine, though I have to use Waze for speed but everything else works great, engine/ dsg.
I really appreciate any help or advice anyone has, this has slowly become an annoying and expensive issue. I really don't want my first car to die after only 2 yrs of owning it. I'm dreading that it is the module itself but I know that's the most likely cause. ( happy to post error codes and photos if thats any help)

[kamold]

What are the fault codes?
Those generation of MK60EC1 ABS modules are prone to controller failures.

[Kieran_2]

What are the fault codes?
Those generation of MK60EC1 ABS modules are prone to controller failures.

I replaced the mutli fuse (1k0937629a) based on 00668 code for term. 30 but that code still shows unfortunately
Thanks.

Car Scanner ELM OBD2
DTC report
Selected brand: Volkswagen

============1==============
U0415
Raw code: C415
ECU: Engine control unit
Status: Pending
Invalid data received - anti-lock brake system (ABS) control module

============2==============
01303
Raw code: 0517
ECU: 19. CAN Gateway
Status: Test conditions are met, Validated and stored in non volatile memory, Validated fault present at time of request
Phone Transceiver-R36; Transmitter and receiver for telephone R36

============3==============
02395
Raw code: 095B
ECU: 09. Onboard supply control unit
Status: Pending fault present during this driving cycle, Test is inhibited by other DTC, Validated and stored in non volatile memory
Front Right Parking Lamp-M3; Front right parking light bulb-M3

============4==============
18255
Raw code: 474F
ECU: 02. Transmission control unit
Status: Validated and stored in non volatile memory, Validated fault present at time of request
P1847 Read data from the fault memory of the ABS control unit; Please read out the fault memory of the ABS control unit

============5==============
16352
Raw code: 3FE0
ECU: 03. ABS control unit
Status: Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Control block; Control unit

============6==============
00668
Raw code: 029C
ECU: 03. ABS control unit
Status: Pending fault present during this driving cycle, Validated and stored in non volatile memory, Validated fault present at time of request
Vehicle voltage, terminal 30; On-board voltage terminal 30

============7==============
00287
Raw code: 011F
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Right Wheel Speed Sensor-G44; Rear right speed sensor-G44

============8==============
00290
Raw code: 0122
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Left Wheel Speed Sensor-G46; Rear left speed sensor-G46; Throttle valve potentiometer-G69 signal too small

============9==============
00285
Raw code: 011D
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Right Wheel Speed Sensor-G45; Front right speed sensor-G45

============10==============
00283
Raw code: 011B
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Left Wheel Speed Sensor-G47; Front left speed sensor-G47

============11==============
04278
Raw code: 0010B6
ECU: 01. Engine control unit
Status: Test failed, Test failed (current drive cycle), Pending, Test failed since last DTC clear, Warning indicator requested
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module

============12==============
13701904
Raw code: D11310
ECU: 08. Heater and climate[Archive (inactive)]
Status: Confirmed
U111300: Function limitation due to received malfunction value
Bremsensteuergerät - bitte Fehlerspeicher auslesen

============13==============
12850432
Raw code: C41500
ECU: 15. SRS
Status: Test failed, Confirmed
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module
Communication with Vehicle Dynamics Control Module Implausible

============14==============
13637376
Raw code: D01700
ECU: 17. Dashboard
Status: Test failed, Confirmed

============15==============
01316
Raw code: 0524
ECU: 44. Power steering
Status: Pending fault present, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Brake control unit

============16==============
00110
Raw code: 006E
ECU: 52. Front passenger door electronics
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Indicator repeater lamp in the exterior mirror housing on the front passenger side-L132; Front passenger side mirror indicator lamp-L132

============17==============
01303
Raw code: 0517
ECU: 56. Head unit (MMI) (VW TP2.0)
Status: Test conditions are met, Validated and stored in non volatile memory, Validated fault present at time of request
Phone Transceiver-R36; Transmitter and receiver for telephone R36

[kamold]

3 of your 4 ABS wheel speed sensors are faulty.
Don't use cheap Chinese ones they don't work.
Get proper Bosch or other suitable and compatible parts.
If they are not the correct part they will physically fit, but the gap between the tone ring and hall effect sensor in the wheel speed sensor will not be correct and you'll get a fault.
once all 4 speed sensors are working correctly and the faults don't return, you can work through any remaining faults.

[Lucas_R]

RunAutoParts sell the wheel speed sensors for Mk6 Golf. About $40-45 each for Vemu, Bosch or TRW.

Run Auto Parts

[Kieran_2]

Just ordered a full set of PAT abs sensors, ill let you know if this fixes the problem. Thankyou.

[Kieran_2]

Hey, I took your advice and swapped all 4 abs sensors with quality parts and there has been no change so far. All codes and lights are still present, what do you recommend I do now?

Car Scanner ELM OBD2
DTC report
Selected brand: Volkswagen

============1==============
U0415
Raw code: C415
ECU: Engine control unit
Status: Pending
Invalid data received - anti-lock brake system (ABS) control module

============2==============
U0415
Raw code: C415
ECU: Engine control unit
Status: Pending
Invalid data received - anti-lock brake system (ABS) control module

============3==============
18255
Raw code: 474F
ECU: 02. Transmission control unit[Archive (inactive)]
Status: Validated and stored in non volatile memory
P1847 Read data from the fault memory of the ABS control unit; Please read out the fault memory of the ABS control unit

============4==============
16352
Raw code: 3FE0
ECU: 03. ABS control unit
Status: Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Control block; Control unit

============5==============
00287
Raw code: 011F
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Right Wheel Speed Sensor-G44; Rear right speed sensor-G44

============6==============
00290
Raw code: 0122
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Left Wheel Speed Sensor-G46; Rear left speed sensor-G46; Throttle valve potentiometer-G69 signal too small

============7==============
00285
Raw code: 011D
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Right Wheel Speed Sensor-G45; Front right speed sensor-G45

============8==============
00283
Raw code: 011B
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Left Wheel Speed Sensor-G47; Front left speed sensor-G47

============9==============
04278
Raw code: 0010B6
ECU: 01. Engine control unit
Status: Test failed, Test failed (current drive cycle), Pending, Test failed since last DTC clear, Warning indicator requested
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module

============10==============
12850432
Raw code: C41500
ECU: 15. SRS
Status: Test failed, Confirmed
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module
Communication with Vehicle Dynamics Control Module Implausible

============11==============
01316
Raw code: 0524
ECU: 44. Power steering
Status: Pending fault present, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Brake control unit

============12==============
U0415
Raw code: C415
ECU: Engine control unit
Status: Pending
Invalid data received - anti-lock brake system (ABS) control module

============13==============
18255
Raw code: 474F
ECU: 02. Transmission control unit[Archive (inactive)]
Status: Validated and stored in non volatile memory
P1847 Read data from the fault memory of the ABS control unit; Please read out the fault memory of the ABS control unit

============14==============
16352
Raw code: 3FE0
ECU: 03. ABS control unit
Status: Pending fault present during this driving cycle, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Control block; Control unit

============15==============
00287
Raw code: 011F
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Right Wheel Speed Sensor-G44; Rear right speed sensor-G44

============16==============
00290
Raw code: 0122
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Left Wheel Speed Sensor-G46; Rear left speed sensor-G46; Throttle valve potentiometer-G69 signal too small

============17==============
00285
Raw code: 011D
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Right Wheel Speed Sensor-G45; Front right speed sensor-G45

============18==============
00283
Raw code: 011B
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Front Left Wheel Speed Sensor-G47; Front left speed sensor-G47

============19==============
04278
Raw code: 0010B6
ECU: 01. Engine control unit
Status: Test failed, Test failed (current drive cycle), Pending, Test failed since last DTC clear, Warning indicator requested
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module

============20==============
12850432
Raw code: C41500
ECU: 15. SRS
Status: Test failed, Confirmed
U041500: Invalid Data Received From, Anti-Lock Brake System Control Module
Communication with Vehicle Dynamics Control Module Implausible

============21==============
01316
Raw code: 0524
ECU: 44. Power steering
Status: Pending fault present, Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Brake control unit

[MIG]

Double-check if there are any other fuses feeding the ABS, sometimes a smaller one is used for the sensors.

Try testing the voltage at one of the sensor connectors, there should be some voltage of 5-12v with the sensor disconnected, and with the ignition on.

The next place I would be looking is at the main ABS connector, check voltages and grounds. then check the connection between the sensors and the main connector.

That should at least pinpoint if it's a harness issue, or the module itself.

[Kieran_2]

That should at least pinpoint if it's a harness issue, or the module itself.

First off, thanks for the advice. And secondly all sensors and connectors are perfect, with each speed sensor reading and 11.8V. I then cleaned all the sensors and connections with nothing changing afterwards.

I have nothing else to troubleshoot myself and I've now decided to had it off to a workshop to get an official diagnosis, then hopefully repair instead of replacement.
I'll update this thread once I hopefully get this issue fixed.

[timk]

Did you happen to get this sorted?

I was getting this error:

1 Fault Found:
01130 - ABS Operation
            008 - Implausible Signal

It turns out it was the ABS controller, I was still running the original problematic H35 unit. I swapped in both the controller and pump from a newer Jetta (H31) and it fixed the problem after some coding with VCDS.

Swapping the parts was quite simple but bleeding the new pump was NOT fun!

Not saying you have the same problem but let me know if you want a hand to do a VCDS scan or help troubleshoot.

Cheers

[Lucas_R]

Kieran_2 I noticed throughout your fault scan that you have this error mentioned several times "Throttle valve potentiometer-G69 signal too small"

This error points to an issue with the throttle body valve (or, in the case of a diesel engine, its probably blocked with soot and needs a good cleaning with carby cleaner and various brushes). You might want to have a look at this as it seems to be linked to your ABS control module issue.


00290
Raw code: 0122
ECU: 03. ABS control unit
Status: Test conditions are met, Test is inhibited by other DTC, Validated and stored in non volatile memory, Validated fault present at time of request
Rear Left Wheel Speed Sensor-G46; Rear left speed sensor-G46; Throttle valve potentiometer-G69 signal too small