Audi B6 A4 2003 1.8T BEX ABS issues

   #1  

DJ_drive_safely

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Hi everyone, I've spent a substantial amount of time now trying to figure this out and I could do with some experience to help me get this sorted.

So the car is a 2003 Audi A4 Avant 8E fwd version with the 190PS BEX engine. I've uploaded a photo of the PR-Build here: PR codes

As far as I'm aware the car is currently stock with no mods. Here is the full scan as of an hour ago:

Code:
Monday,02,September,2019,19:33:37:05644
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
Data version: 20190529 DS308.0
www.Ross-Tech.com


VIN: WAUZZZ8E94A157833   License Plate: 
Mileage: 225840km-140330mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
          67 69 75 76 77
 
VIN: WAUZZZ8E94A157833   Mileage: 225840km-140330miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06B-906-018-AVJ.lbl
   Part No SW: 8E0 909 518 AS    HW: 8E0 909 018 A
   Component: 1.8L R4/5VT         0003  
   Coding: 0011511
   Shop #: WSC 63251 000 00000
   VCID: 015E70AA9D186ACFC57-5184

4 Faults Found:
17956 - Boost Pressure Regulation Valve (N75) 
            P1548 - 004 - Open Circuit
16500 - Engine Coolant Temp. Sensor (G62) 
            P0116 - 008 - Implausible Signal - Intermittent
16885 - Vehicle Speed Sensor 
            P0501 - 004 - Implausible Signal - Intermittent - MIL ON
16891 - Idle Control System RPM 
            P0507 - 001 - Higher than Expected. - Intermittent
Readiness: 0000 1000

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-517.lbl
   Part No: 8E0 614 517 
   Component: ABS/ESP front       3429  
   Coding: 04475
   Shop #: WSC 00000  
   VCID: 6596443A6C70A6EF59F-51F2

4 Faults Found:
00526 - Brake Light Switch (F) 
            36-10 - Open Circuit - Intermittent
00290 - ABS Wheel Speed Sensor; Rear Left (G46) 
            27-10 - Implausible Signal - Intermittent
00283 - ABS Wheel Speed Sensor; Front Left  (G47) 
            30-00 - Open or Short to Plus
00778 - Steering Angle Sensor (G85) 
            27-00 - Implausible Signal

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
   Part No: 8E0 820 043 AA
   Component:   A4 Klimaautomat   1323  
   Coding: 00000
   Shop #: WSC 63251  
   VCID: 6098552E7352C3C7AA9-5160

1 Fault Found:
00819 - High Pressure Sensor (G65) 
            07-00 - Signal too Low

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 8E0-907-279-8E2.lbl
   Part No: 8E0 907 279 F
   Component: int. Lastmodul  RDW 0517  
   Coding: 00001
   Shop #: WSC 63251  
   VCID: 3536D47A9C50166F29F-4B00

1 Fault Found:
01312 - Powertrain Data Bus 
            79-00 - Please Check Fault Codes

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8E0-959-655-84.lbl
   Part No: 8E0 959 655 J
   Component: Airbag 8.4EP        1002  
   Coding: 0010602
   Shop #: WSC 63251 000 00000
   VCID: 3E24CB56AC66D537F85-5184

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8E0-953-549.lbl
   Part No: 8E0 953 549 S
   Component: Lenksáulenmodul     0611  
   Coding: 01012
   Shop #: WSC 63251  
   VCID: 43D2BAA2C284B8DF97B-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8E0-920-9xx-8E2.lbl
   Part No: 8E0 920 950 N
   Component: KOMBI+WEGFAHRS. RB4 D42  
   Coding: 00401
   Shop #: WSC 05314  
   VCID: 3430E97E972A0F671E1-5184
   WAUZZZ8E94A157833     AUZ6Z0C0253032

1 Fault Found:
01304 - Radio 
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 45: Inter. Monitor        Labels: 8E0-951-177.lbl
   Part No: 8E0 951 177 
   Component: Innenraumueberw.   0704  
   Coding: 00001
   Shop #: WSC 00000  
   VCID: 6B8232028A94909F0FB-513C

1 Fault Found:
01463 - Alarm triggered by Sensor for anti-theft alarm System 
            43-00 - Closed

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
   Part No: 8E0 959 433 BC
   Component: Komfortgerát T3B    1311  
   Coding: 07115
   Shop #: WSC 63251  
   VCID: 73B22A62D2A4485FC7B-4B00

   Subsystem 1 - Part No: 8E2959802B
   Component: Tõrsteuer.FS BRM 0003  

   Subsystem 2 - Part No: 8E2959801B
   Component: Tõrsteuer.BF BRM 0003  

   Subsystem 3 - Part No: 8E0959801A
   Component: Tõrsteuer.HL BRM 0004  

   Subsystem 4 - Part No: 8E0959802A
   Component: Tõrsteuer.HR BRM 0004  

3 Faults Found:
01370 - Alarm triggered by Interior Monitoring 
            35-00 - -
01561 - Rear left door 
            61-10 - Won't De-Safe - Intermittent
01562 - Rear right door 
            61-00 - Won't De-Safe

End----------(Elapsed Time: 05:49, VBatt start/end: 13.6V/13.5V)-----------

The engine codes have only just popped up so I'll be getting to those in due course but the ABs is giving me the biggest headache at the moment.

Ever since I got the car the ESP light would come on and off intermittently - mostly on then the ABS light started showing up. As I didn't have a VCDS cable I took it to a garage a couple of weeks ago to get it scanned and asked them to take a look. Their reader was giving faults for the two front ABS sensors. I asked them to replace them and they swapped them over for two Bosch ones.

Here's where a bunch more problems started happening, CEL light came on and the dash would occasionally start warning ABS fault - take to an AUDI service center or something along those lines. At this point the speedo died as well. I started doing a load more reading and got a used ABS control module for £20 and ordered a VCDS cable from ilexa.

I swapped out the ABS module, recoded it with my fancy new cable, recalibrated the steering angle sensor then cleared the codes - started the engine and everything appeared to be working, I drove about 20m down the road before all the lights came back.

Before having the VCDS cable it was a bit of a scatter gun approach to trying to get this fixed, I'm hoping now you guys will be able to help me get this sorted properly.

I've still got the old ABS module, and this new(er?) one I've tried measuring the wheel speed sensors for all 4 wheels on short test drives, this makes the car do some very weird things and kick in the esp. I can't quite tell if its just stopping the throttle or applying the brakes at this point. I took the front left wheel off, removed the sensor and cleaned the end of it and checked the reluctor ring, it seems solid and unbroken but there's a fair amount of corrosion on it. I've taken a video of me spinning the hub:ABS reluctor ring vid

Can anyone shed some light on the codes i'm getting for the ABS sensor and the best things to check? It's pretty annoying not having the speedo on the car and would like to get this running properly again. The garage said the wheelspeed sensor/ABS sensor are two different parts on the end of this cable, how does the wheel speed sensor work for this car?

Next on my to do list is:

Recheck abs sensor wiring through wheel arch
Recheck connections to ABS unit
Look at the brake pedal sensor (very recent problem and not shown on previous scans)
Check wiring of N75 boost pressure regulator/replace

I'd love to hear some input on this before throwing a bunch more money at this willy nilly!
 
   #2  

Jack@European_Parts

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   #3  

DJ_drive_safely

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Hi Jack,

Thanks for the rapid response. Apologies for not fully following your guidline on posting, I'll make sure to do it properly to make reading it easier next time! Going to get the erWin guid soon.

As the N75 has only turned up a couple of days ago I've not had a chance to check it out just yet. I'll investigate these two parts and report back.

Thanks again.
 
   #5  

DJ_drive_safely

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Hi Jack,

Here's the new auto scan after clearing the codes and letting the engine idle.

Code:
Monday,02,September,2019,22:47:18:05644
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
Data version: 20190529 DS308.0
www.Ross-Tech.com


VIN: WAUZZZ8E94A157833   License Plate: 
Mileage: 225840km-140330mi   Repair Order: 


Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
          67 69 75 76 77
 
VIN: WAUZZZ8E94A157833   Mileage: 225840km-140330miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06B-906-018-AVJ.lbl
   Part No SW: 8E0 909 518 AS    HW: 8E0 909 018 A
   Component: 1.8L R4/5VT         0003  
   Coding: 0011511
   Shop #: WSC 63251 000 00000
   VCID: 015E70AA9D186ACFC57-5160

1 Fault Found:
17956 - Boost Pressure Regulation Valve (N75) 
            P1548 - 004 - Open Circuit
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-517.lbl
   Part No: 8E0 614 517 
   Component: ABS/ESP front       3429  
   Coding: 04475
   Shop #: WSC 00000  
   VCID: 6596443A6C70A6EF59F-51F2

1 Fault Found:
00283 - ABS Wheel Speed Sensor; Front Left  (G47) 
            30-00 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
   Part No: 8E0 820 043 AA
   Component:   A4 Klimaautomat   1323  
   Coding: 00000
   Shop #: WSC 63251  
   VCID: 6098552E7352C3C7AA9-5160

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 8E0-907-279-8E2.lbl
   Part No: 8E0 907 279 F
   Component: int. Lastmodul  RDW 0517  
   Coding: 00001
   Shop #: WSC 63251  
   VCID: 3536D47A9C50166F29F-4B1E

1 Fault Found:
01312 - Powertrain Data Bus 
            79-00 - Please Check Fault Codes

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8E0-959-655-84.lbl
   Part No: 8E0 959 655 J
   Component: Airbag 8.4EP        1002  
   Coding: 0010602
   Shop #: WSC 63251 000 00000
   VCID: 3E24CB56AC66D537F85-5184

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8E0-953-549.lbl
   Part No: 8E0 953 549 S
   Component: Lenksáulenmodul     0611  
   Coding: 01012
   Shop #: WSC 63251  
   VCID: 43D2BAA2C284B8DF97B-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8E0-920-9xx-8E2.lbl
   Part No: 8E0 920 950 N
   Component: KOMBI+WEGFAHRS. RB4 D42  
   Coding: 00401
   Shop #: WSC 05314  
   VCID: 3430E97E972A0F671E1-5184
   WAUZZZ8E94A157833     AUZ6Z0C0253032

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor        Labels: 8E0-951-177.lbl
   Part No: 8E0 951 177 
   Component: Innenraumueberw.   0704  
   Coding: 00001
   Shop #: WSC 00000  
   VCID: 6B8232028A94909F0FB-513C

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
   Part No: 8E0 959 433 BC
   Component: Komfortgerát T3B    1311  
   Coding: 07115
   Shop #: WSC 63251  
   VCID: 73B22A62D2A4485FC7B-4B1E

   Subsystem 1 - Part No: 8E2959802B
   Component: Tõrsteuer.FS BRM 0003  

   Subsystem 2 - Part No: 8E2959801B
   Component: Tõrsteuer.BF BRM 0003  

   Subsystem 3 - Part No: 8E0959801A
   Component: Tõrsteuer.HL BRM 0004  

   Subsystem 4 - Part No: 8E0959802A
   Component: Tõrsteuer.HR BRM 0004  

1 Fault Found:
01562 - Rear right door 
            61-00 - Won't De-Safe

End----------(Elapsed Time: 06:05, VBatt start/end: 12.2V/14.2V)-----------
 
   #7  

DJ_drive_safely

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I will get to these for certain. I ran another scan after clearing the codes and producing that one and it's now showing everything clear?

Scan attached:

Code:
Monday,02,September,2019,23:00:46:05644
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 19.6.1.0 (x64)  HEX-V2 CB: 0.4508.4
Data version: 20190529 DS308.0
www.Ross-Tech.com


VIN: WAUZZZ8E94A157833   License Plate: 
Mileage: 225840km-140330mi   Repair Order: 


Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
          67 69 75 76 77
 
VIN: WAUZZZ8E94A157833   Mileage: 225840km-140330miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 
   VCID: 55F674FA3D10366FC9F-5184


-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 8E0-614-517.lbl
   Part No: 8E0 614 517 
   Component: ABS/ESP front       3429  
   Coding: 04475
   Shop #: WSC 00000  
   VCID: 6596443A6C70A6EF59F-51F2

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
   Part No: 8E0 820 043 AA
   Component:   A4 Klimaautomat   1323  
   Coding: 00000
   Shop #: WSC 63251  
   VCID: 6098552E7352C3C7AA9-5184

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 8E0-907-279-8E2.lbl
   Part No: 8E0 907 279 F
   Component: int. Lastmodul  RDW 0517  
   Coding: 00001
   Shop #: WSC 63251  
   VCID: 3536D47A9C50166F29F-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 8E0-959-655-84.lbl
   Part No: 8E0 959 655 J
   Component: Airbag 8.4EP        1002  
   Coding: 0010602
   Shop #: WSC 63251 000 00000
   VCID: 3E24CB56AC66D537F85-5184

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8E0-953-549.lbl
   Part No: 8E0 953 549 S
   Component: Lenksáulenmodul     0611  
   Coding: 01012
   Shop #: WSC 63251  
   VCID: 43D2BAA2C284B8DF97B-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8E0-920-9xx-8E2.lbl
   Part No: 8E0 920 950 N
   Component: KOMBI+WEGFAHRS. RB4 D42  
   Coding: 00401
   Shop #: WSC 05314  
   VCID: 3430E97E972A0F671E1-5184
   WAUZZZ8E94A157833     AUZ6Z0C0253032

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor        Labels: 8E0-951-177.lbl
   Part No: 8E0 951 177 
   Component: Innenraumueberw.   0704  
   Coding: 00001
   Shop #: WSC 00000  
   VCID: 6B8232028A94909F0FB-513C

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 8E0-959-433-MAX.clb
   Part No: 8E0 959 433 BC
   Component: Komfortgerát T3B    1311  
   Coding: 07115
   Shop #: WSC 63251  
   VCID: 73B22A62D2A4485FC7B-4B1E

   Subsystem 1 - Part No: 8E2959802B
   Component: Tõrsteuer.FS BRM 0003  

   Subsystem 2 - Part No: 8E2959801B
   Component: Tõrsteuer.BF BRM 0003  

   Subsystem 3 - Part No: 8E0959801A
   Component: Tõrsteuer.HL BRM 0004  

   Subsystem 4 - Part No: 8E0959802A
   Component: Tõrsteuer.HR BRM 0004  

1 Fault Found:
01562 - Rear right door 
            61-00 - Won't De-Safe

End----------(Elapsed Time: 05:48, VBatt start/end: 14.2V/14.1V)-----------

I'm pretty certain that these will reappear after going on a very short drive. Is there anything that you would do to aid diagnosis when these codes come back?
 
   #8  

Jack@European_Parts

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Did you RTFB the codes and test each item as specified in the RTFB?

Did you log blocks with VCDS of each sensor and test wiring for each component?

What is status of ignition switch?
Ground points okay?
Mechanical components check out as per RTFB?
 
Last edited:
   #9  

HMC

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Hi Simon,
You should follow Jack's advice but if your main issue is the ABS, the first thing to do is double check the live data from N/S/F wheel speed sensor (G47) and load test the wiring to the ABS module from the sensor.
Regards HMC
 
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