Audi A4 B8 Steering Angle sensor no signal (G85)

   #1  

Ford5030

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Hello everyone, I've been a longtime reader on here but finally made myself a account.

I've been having some problems with a 2012 A4 that's been giving me some bother the last week or so, usually I'd work on a problem long enough and I'd eventually find a solution but I have to say I'm beat this time.
The blower motor was replaced this week and I'm trying to see if that's a cause to this. My bother has a older launch diagnostics reader which he used it the clear all fault codes on the car (some where there many months or more) and ever since then there has been 2 recurring fault codes (in the scan I uploaded) basically saying that it cannot communicate with the steering position sensor G85.
I've the full autoscan in this post for someone more knowledgeable than me to look at.

I've tried clearing the faults and they immediately come back. I've looked at the measuring blocks for the steering angle position sensor in both the ABS module and Steering wheel module and its reading Zero all the time no matter what
position the steering wheel is in. Taking the car for a drive did not help at all either.

I tried to follow the instructions to do a steering angle position zero calibration by going into the ABS Module, Login, Entered the security code successfully, I would then click on basic settings, channel 001 and click go. From here on
It actually shows the steering angle but unlike the measuring blocks i was in which was showing zero all the time this actually shows the correct angle/position form the sensor. BUT once I click the [ON/OFF/Next] button to activate basic settings which says off it immediately says ERROR Group 001 Not available across the 4 measuring value boxes. From hear on I'm Stumped, I got a second steering wheel sensor and plugged it in and it gave me the exact same problem again so I don't think it's the problem.

Code:
Chassis Type: 8K-AU48 (8T0)
Scan: 01 03 05 08 09 10 15 16 17 19 42 46 47 52 53 55 56 62 72 77
         

VIN: WAUZZZ8KXCA098327   Mileage: 205380km-127617miles

01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: Cannot be reached 1100
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: Malfunction 0010
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CJCB)       Labels:. 03L-906-018-CGL.clb
   Part No SW: 03L 906 018 JR    HW: 03L 906 018 DN
   Component: R4 2.0l TDI   H25 9977  
   Revision: 45H25---    
   Coding: 0A194012232503080000
   Shop #: WSC 55397 002 1048576
   ASAM Dataset: EV_ECM20TDI01103L906018JR 003007
   ROD: EV_ECM20TDI01103L906018DG.rod
   VCID: 035372A2DB97869FD47-8056

4 Faults Found:
4698 - Function Restriction due to Faults in Other Modules 
          U1113 00 [047] - -
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 6
                    Mileage: 205374 km
                    Date: 2020.04.02
                    Time: 15:31:53

                    Engine speed: 829.50 /min
                    Normed load value: 33.3 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 73 °C
                    Intake air temperature: 21 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 13.160 V
                    Unlearning counter according OBD: 40
                    Cruise Control System (CCS): switch position-Bits 0-7: 0
                    Cruise Control System (CCS): status-Bits 0-7: 200
                    Cruise control switch-off: irreversible-Bits 0-7: 2
                    Cruise control switch-off: reversible-Bits 0-7: 255
                    Cruise Control System: specified speed: 0.00 km/h
                    Engine control module reset status-Bits 0-7: 0
                    Engine control module reset status-Bits 0-7: 0
                    Cruise control switch-off: irreversible w. brake intervention-Bits 0-7: 4

4699 - Function Restriction due to Faults in Other Modules 
          U1113 00 [047] - -
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 6
                    Mileage: 205374 km
                    Date: 2020.04.02
                    Time: 15:31:53

                    Engine speed: 829.50 /min
                    Normed load value: 33.3 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 73 °C
                    Intake air temperature: 21 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 13.160 V
                    Unlearning counter according OBD: 40
                    Cruise Control System (CCS): switch position-Bits 0-7: 0
                    Cruise Control System (CCS): status-Bits 0-7: 200
                    Cruise control switch-off: irreversible-Bits 0-7: 2
                    Cruise control switch-off: reversible-Bits 0-7: 255
                    Cruise Control System: specified speed: 0.00 km/h
                    Engine control module reset status-Bits 0-7: 0
                    Engine control module reset status-Bits 0-7: 0
                    Cruise control switch-off: irreversible w. brake intervention-Bits 0-7: 4

5608 - No Communications with Steering Angle Sender (G85) 
          U0126 00 [047] - -
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Mileage: 205374 km
                    Date: 2020.04.02
                    Time: 15:31:53

                    Engine speed: 825.50 /min
                    Normed load value: 33.7 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 73 °C
                    Intake air temperature: 21 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 13.220 V
                    Unlearning counter according OBD: 40
                    Limitation: accelerator pedal: 0.0 Nm
                    CAN status - engine control module-Bits 0-7: 0
                    Cruise Control System (CCS): status-Bits 0-7: 200
                    CAN status - transmission control module-Bits 0-7: 0
                    CAN status - brake control module 1-Bits 0-7: 0
                    CAN status - brake control module 2-Bits 0-7: 0
                    selected gear-Bits 0-7: 0

4714 - Steering Column Control Module 
          U0212 00 [047] - No Communications
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Mileage: 205374 km
                    Date: 2020.04.02
                    Time: 15:31:53

                    Engine speed: 830.50 /min
                    Normed load value: 32.9 %
                    Vehicle speed: 0 km/h
                    Coolant temperature: 73 °C
                    Intake air temperature: 21 °C
                    Ambient air pressure: 1000 mbar
                    Voltage terminal 30: 13.260 V
                    Unlearning counter according OBD: 40
                    Limitation: accelerator pedal: 0.0 Nm
                    CAN status - engine control module-Bits 0-7: 0
                    Cruise Control System (CCS): status-Bits 0-7: 200
                    CAN status - transmission control module-Bits 0-7: 0
                    CAN status - brake control module 1-Bits 0-7: 0
                    CAN status - brake control module 2-Bits 0-7: 0
                    selected gear-Bits 0-7: 0

Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 8K0-907-379-V1.clb
   Part No SW: 8K0 907 379 BF    HW: 8K0 907 379 BF
   Component: ESP8 front    H04 0030  
   Revision: --------    Serial number: --------------
   Coding: 160504
   Shop #: WSC 06324 000 00000
   VCID: 7EA50356B0F5EB77BB9-802A

2 Faults Found:
01486 - System Function Test Activated 
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 126
                    Mileage: 205377 km
                    Time Indication: 0
                    Date: 2020.04.02
                    Time: 15:39:15

             Freeze Frame:
                    Hex Value: 0x0040
                    Hex Value: 0x0702
                    Hex Value: 0x002D
                    Hex Value: 0x31A5
                    Hex Value: 0x00FF

00778 - Steering Angle Sensor (G85) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 126
                    Mileage: 205377 km
                    Time Indication: 0
                    Date: 2020.04.02
                    Time: 15:39:15

             Freeze Frame:
                    Hex Value: 0x0040
                    Hex Value: 0x0702
                    Hex Value: 0x001C
                    Hex Value: 0x7AA5
                    Hex Value: 0x00FF


-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393)       Labels:. 8K0-907-064-05.clb
   Part No SW: 8K0 907 064 CC    HW: 8K0 907 064 CC
   Component: BCM2 2.0      H05 0435  
   Revision: 00002001    
   Coding: 033100
   Shop #: WSC 06325 000 00000
   VCID: 73B322628BB7B61FC47-8026

   Subsystem 1 - Part No SW: 8T0 959 754 D    HW: 8T0 959 754 D
   Component: FBSAUDIB8 IDG  H60 0072 
   Serial number: 0811000189072007    

   Subsystem 2 - Part No SW: 8K0 905 852 D    HW: 8K0 905 852 D
   Component: J764 ELV MLB  H37 0042 
   Serial number: 2311000245288008    

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels:. 8Tx-820-043-3Z.clb
   Part No SW: 8T2 820 043 AF    HW: 8T2 820 043 AF
   Component: KLIMA 3 ZONEN H08 0182  
   Revision: D0000000    Serial number: 01141120110910
   Coding: 34240000
   Shop #: WSC 55397 002 1048576
   VCID: 76B51B7698C5A337E39-8022

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8K0-907-063.clb
   Part No SW: 8K0 907 063 N    HW: 8K0 907 063 N
   Component: BCM1 1.0      H30 0392  
   Revision: 09030001    Serial number: 00000001127396
   Coding: 260050914034AF010001000000001D0D001D030806010141000000
   Shop #: WSC 06325 000 00000
   VCID: 3A2DCF46EC5D0757C71-806E

   Subsystem 1 - Part No SW: 8K2 955 119 A    HW: 8T2 955 119   Labels: 1KX-955-119.CLB
   Component: WWS 141111  H06 0070 
   Serial number: SWF11110145102      
   Coding: 00FD11

   Subsystem 2 - Part No SW: 8K0 955 559     HW: 8K0 955 559   Labels: 8K0-955-559.CLB
   Component: RLS  H04 0003 
   Serial number: 11776088            
   Coding: 025028

   Subsystem 3 - Part No SW: 8K0 941 531 AS    HW: 8K0 941 531 AS
   Component: E1 - LDS  H03 0031 
   Serial number: 00000000000511110633

1 Fault Found:
00466 - Control Module for Steering Column Electronics (J527) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 126
                    Mileage: 205374 km
                    Time Indication: 0
                    Date: 2020.04.02
                    Time: 15:31:00


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:. 8K0-919-475.clb
   Part No SW: 8K0 919 475 T    HW: 8P0 919 475 M
   Component: PARKHILFE 4K  H01 0081  
   Revision: 11001001    Serial number: 36861131303812
   Coding: 000003
   Shop #: WSC 06325 000 00000
   VCID: 4ACD9F86BCBD97D7571-801E

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:| 8K0-959-655.clb
   Part No SW: 8K0 959 655 L    HW: 8K0 959 655 L
   Component: AirbagVW-AU10 H44 0610  
   Serial number: 003JMD0HG5HQ  
   Coding: 30533435363030303030554A3052384B3053
   Shop #: WSC 06325 000 00000
   ASAM Dataset: EV_AirbaECUVWAUDI010 003010
   ROD: EV_AirbaECUVWAUDI010_003_AU48.rod
   VCID: 46D5ABB6A82573B7B39-8012

   Crash sensor for side airbag: driver side: 
   Serial number: 6334MSME67120E1FJ

   Crash sensor for side airbag: front passenger side: 
   Serial number: 6344MSME67056B20B

   Crash sensor for side airbag: rear: driver side: 
   Serial number: 6352QSME39643D50K

   Crash sensor for side airbag: rear: passenger side: 
   Serial number: 6362QSME0E64494CV

   Crash sensor for front airbag: driver side: 
   Serial number: 63732SME0E66157C7

   Crash sensor for front airbag: front passenger side: 
   Serial number: 63832SME1B64025E0

1 Fault Found:
12658176 - No Communications with Steering Angle Sender (G85) 
          U0126 00 [009] - -
          [Steer Angle Control Unit no signal/communication]
          Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 126
                    Mileage: 205374 km
                    Date: 2020.04.02
                    Time: 15:31:51


-------------------------------------------------------------------------------
Address 16: Steering wheel (J527)       Labels:. 8K0-953-568.clb
   Part No SW: 8K0 953 568 F    HW: 8K0 953 568 F
   Component: Lenks.Modul   H17 0014  
   Revision: --------    Serial number: 90372KKC000Z7 
   Coding: 000016
   Shop #: WSC 06325 123 12345
   VCID: 3D27C45AFD73306FE23-8068

   Component: E221 - MFL  H02 0010 

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 8T0-920-xxx-17.clb
   Part No SW: 8K0 920 981 D    HW: 8K0 920 981 D
   Component: KOMBIINSTR.   H31 0258  
   Revision: 00000000    Serial number: EJD249CCC     
   Coding: 2F04080002002600010000
   Shop #: WSC 06325 000 00000
   VCID: 3431E17ECE39F1271DD-8060

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 8T0-907-468.clb
   Part No SW: 8T0 907 468 AF    HW: 8T0 907 468 H
   Component: GW-BEM 5CAN   H06 0121  
   Revision: GB901054    Serial number: 5400G11B028285
   Coding: 00CF07
   Shop #: WSC 55397 002 1048576
   VCID: 05576CBAD523B8AFFA3-8050

   Subsystem 1 - Part No SW: 8T0 915 181     HW: 8T0 915 181 
   Component: J367-BDMHella  H03 8040 
   Serial number: 9030785801          

   Subsystem 2 - Part No SW: 8K0 959 663     HW: 8K0 959 663 
   Component: J532_DCDCStab  H17 0042 
   Serial number: 11323001124021200181

1 Fault Found:
00778 - Steering Angle Sensor (G85) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 126
                    Mileage: 205374 km
                    Time Indication: 0
                    Date: 2020.04.02
                    Time: 15:31:49

             Freeze Frame:
                    Bin. Bits:    11111
                    Voltage: 13.00 V
                    Count: 6
                    Bin. Bits:    10000
                    Time: 5.30 s


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 8K0-959-793.clb
   Part No SW: 8T0 959 793 N    HW: 8T0 959 793 B
   Component: TSG FA        H07 1501  
   Revision: --------    Serial number: --------------
   Coding: 011002204001410001
   Shop #: WSC 06325 000 00000
   VCID: 54F181FE6EF9D1273DD-8000

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. (J393)       Labels:. 8K0-907-064-46.clb
   Part No SW: 8K0 907 064 CC    HW: 8K0 907 064 CC
   Component: BCM2 2.0      H05 0435  
   Revision: 00002001    Serial number: 0162663207    
   Coding: 011B062200B904408020013680000000
   Shop #: WSC 06325 000 00000
   VCID: 73B322628BB7B61FC47-8026

   Subsystem 1 - Part No: 8K0 951 177 
   Component: DWA-Sensor  H02 0040 

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501 

1 Fault Found:
00466 - Control Module for Steering Column Electronics (J527) 
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 5
                    Reset counter: 126
                    Mileage: 205374 km
                    Time Indication: 0
                    Date: 2020.04.02
                    Time: 15:31:48


-------------------------------------------------------------------------------
Address 47: Sound System (J525)       Labels:. 8T0-035-223-ASC.clb
   Part No SW: 8T0 035 223 AH    HW: 8T0 035 223 
   Component: DSP STD       H07 0230  
   Revision: S2200000    
   Coding: 0203010102
   Shop #: WSC 06325 000 00000
   VCID: 74B1217E8EB9B127DDD-8020

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 8K0-959-792.clb
   Part No SW: 8T0 959 792 N    HW: 8T0 959 792 B
   Component: TSG BF        H07 1501  
   Revision: --------    Serial number: --------------
   Coding: 011002204001410001
   Shop #: WSC 06325 000 00000
   VCID: 53F382E26BF7D61F247-8006

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake (J540)       Labels: 8K0-907-801-V1.clb
   Part No SW: 8K0 907 801 H    HW: 8K0 907 801 H
   Component: EPB Audi B8   H09 0100  
   Revision: 00000003    Serial number: 20000000146113
   Shop #: WSC 00000 000 00000
   VCID: 3431E17ECE39F1271DD-8060

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range (J431)       Labels:| 8X0-907-357.clb
   Part No SW: 4H0 907 357 B    HW: 4H0 907 357 B
   Component: ....LWR12.... H02 0010  
   Serial number: 111109-0002-160
   Coding: 1171941010000300
   Shop #: WSC 06325 000 00000
   ASAM Dataset: EV_HeadlRegulBasic 005001
   ROD: EV_HeadlRegulBasic.rod
   VCID: 2D07F41A2D93A0EF523-8078

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J503)       Labels:. 8Tx-035-1xx-56.clb
   Part No SW: 8T2 035 186 P    HW: 8T2 035 186 P
   Component: Concert3      H06 0350  
   Revision: 00000011    Serial number: AUZ5Z6K1669372
   Coding: 0502008201018D00035B070000
   Shop #: WSC 06325 000 00000
   VCID: 45D7ACBA95A378AFBA3-8010

   Subsystem 1 - Part No SW: 8T0 919 603 F    HW: 8T0 919 603 F
   Component: Display  

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 8K0-959-795.clb
   Part No SW: 8T0 959 795 N    HW: 8T0 959 795 B
   Component: TSG HL        H06 1501  
   Revision: --------    Serial number: --------------
   Coding: 010002204001210001
   Shop #: WSC 06325 000 00000
   VCID: 56F57BF67805C337C39-8002

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 8K0-959-794.clb
   Part No SW: 8T0 959 795 N    HW: 8T0 959 795 B
   Component: TSG HR        H06 1501  
   Revision: --------    Serial number: --------------
   Coding: 010002204001210001
   Shop #: WSC 06325 000 00000
   VCID: 56F57BF67805C337C39-8002

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8T0 862 335 F    HW: 8T0 862 335 E
   Component: FSE_256x BT     H45 0660  
   Revision: 00000000    Serial number: 00000005446405
   Coding: 0010320
   Shop #: WSC 06325 000 00000
   VCID: 3D27C45AF173306FE23-8068

No fault code found.

End----------(Elapsed Time: 01:35, VBatt start/end: 14.8V/14.7V)-----------

If I knew for sure it was a new sensor I needed i don't mind spending the money on it, I just find it strange that its a "no communication" fault I'm getting and nothing else.

Some help or advice on what to do going forward now would be greatly appreciated.
All the Best, Michael
 
   #2  

Uwe

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Hi and welcome.

I have to agree that this is a head-scratcher.

Hopefully someone reading it will have some ideas.

-Uwe-
 
   #3  

Dana

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Hmm, G85 failure (which is the entire 16-Steering wheel module/J527) isn't uncommon - but there aren't faults in address 16 for a faulty sensor so this is odd. From a wiring point of view there happen to be 2 fuses to J527 so I'd make sure both are OK. Check your info but I believe those to be ST1 SD5 and ST2 SD12.

Edit, I just noticed you already plugged in a different 16 module so this clearly isn't module failure. Hopefully one of those fuses are blown.
 
   #4  

Ford5030

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Thanks for recommending me to check the fuses, You hit the nail on the head!

Since It wasn't me who replaced the blower I went and looked at everything again from scratch.
This all happened while the car was stopped so I looked at the wiring around the blower area and it seems to be all alright, Went then to check the fuse box compartment and found a piggy back fuse holder (aftermarket clearly) with a red wire snaking off deeper into the car, Now I don't know what the wires for but I'd guess a dash cam as I see one mounted in the car. Pulled the fuse and voila, All the lights went out. Took the car for a drive and it must have calibrated itself then as the last of the EPS/ABS lights went out too. Whatever that piggyback fuse is doing it clearly messed with the connection to the steering angle module.

Can't say how big a relief it is to find the problem, I was contemplating getting a ABS Module or else a brand new steering wheel angle module to try fix the problem. I'm not sure what the slot does that the piggy back fuse is taking power from but I'm not going to touch it now that everything working in case it gives more problems.
 
   #6  

Ford5030

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Fuse was intact but loose, I don't think it was making a connection in the socket. I don't know what the socket does but I'd say it's something to do with providing power to the steering wheel module (G85) and it was pulled loose when the blower was installed

I'd wager whoever installed the dashcam just picked a random fuse not knowing what it does.
 
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