Ran a scan. Here's what I got:
TL;DR - Here are the two relevant codes I've gotten. The remaining codes are due to certain things being unplugged.
Scanning the car earlier only pointed to Circuit 1. I even ran a test in the engine module through VCDS and circuit 2 would audibly adjust the fan speed. Circuit 1 did not respond to the test (as it was already on full blast).
001152 - Coolant Fan Control Circuit 1
P0480 - 004 - Electrical Malfunction
Freeze Frame:
Fault Status: 01100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 00:02:15
Freeze Frame:
RPM: 679 /min
Load: 24.3 %
Speed: 0.0 km/h
Temperature: 48.0°C
Temperature: 31.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V
001153 - Coolant Fan Control Circuit 2
P0481 - 004 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 00:22:29
Freeze Frame:
RPM: 664 /min
Load: 29.8 %
Speed: 0.0 km/h
Temperature: 53.0°C
Temperature: 34.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V
Code:
Mileage: 235530km-146351mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: 8T-AU48 (8T0)
Scan: 01 03 05 06 07 08 09 0E 0F 10 14 15 16 17 19 1B 1E 36 37 3C
42 46 47 52 53 55 56 65 67 6C 77
VIN: WAURV78T19A055187 Mileage: 235530km-146351miles
01-Engine -- Status: Malfunction 0010
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
06-Seat Mem. Pass -- Status: OK 0000
07-Control Head -- Status: Cannot be reached 1100
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
0E-Media Player 1 -- Status: Cannot be reached 1100
0F-Digital Radio -- Status: Cannot be reached 1100
10-Park/Steer Assist -- Status: OK 0000
14-Susp. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
1B-Active Steering -- Status: OK 0000
1E-Media Player 2 -- Status: Cannot be reached 1100
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: Cannot be reached 1100
3C-Lane Change -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: Cannot be reached 1100
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: Cannot be reached 1100
65-Tire Pressure -- Status: OK 0000
67-Voice Control -- Status: Cannot be reached 1100
6C-Back-up Cam. -- Status: OK 0000
77-Telephone -- Status: Cannot be reached 1100
-------------------------------------------------------------------------------
Address 01: Engine (J623-CAUB) Labels:. 079-907-560-CAU.clb
Part No SW: 8T0 907 560 S HW: 8T0 907 560
Component: 4.2l V8/4V H10 0004
Revision: 76H10---
Coding: 01140009180F0120
Shop #: WSC 63089 001 1048576
VCID: 4A9B5F42E5B11CD695-801E
3 Faults Found:
004200 - Intake Air Switch-Over Valve (N335)
P1068 - 004 - Open Circuit
Freeze Frame:
Fault Status: 01100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 00:02:15
Freeze Frame:
RPM: 668 /min
Load: 24.7 %
Speed: 0.0 km/h
Temperature: 48.0°C
Temperature: 31.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.843 V
001152 - Coolant Fan Control Circuit 1
P0480 - 004 - Electrical Malfunction
Freeze Frame:
Fault Status: 01100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 00:02:15
Freeze Frame:
RPM: 679 /min
Load: 24.3 %
Speed: 0.0 km/h
Temperature: 48.0°C
Temperature: 31.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V
001153 - Coolant Fan Control Circuit 2
P0481 - 004 - Electrical Malfunction - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 2
Fault Frequency: 1
Reset counter: 255
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 00:22:29
Freeze Frame:
RPM: 664 /min
Load: 29.8 %
Speed: 0.0 km/h
Temperature: 53.0°C
Temperature: 34.0°C
Absolute Pres.: 980.0 mbar
Voltage: 13.970 V
Readiness: 0110 1101
-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104) Labels:. 8K0-907-379-V1.clb
Part No SW: 8K0 907 379 AH HW: 8K0 907 379 AH
Component: ESP8 quattro H04 0230
Revision: -------- Serial number: --------------
Coding: 112500
Shop #: WSC 06325 000 00000
VCID: 7F0D3E96EEF3697E72-802A
No fault code found.
-------------------------------------------------------------------------------
Address 05: Acc/Start Auth. (J393) Labels:. 8K0-907-064-05.clb
Part No SW: 8K0 907 064 AG HW: 8K0 907 064 AG
Component: BCM2 1.1 H80 0145
Revision: 00002001
Coding: 0F0000
Shop #: WSC 06325 000 00000
VCID: 75E1DCBEDCCF232E28-8020
Subsystem 1 - Part No SW: 8K0 905 852 D HW: 8K0 905 852 D
Component: J764 ELV MLB H36 0042
Serial number: 0209000020338015
No fault code found.
-------------------------------------------------------------------------------
Address 06: Seat Mem. Pass (J521) Labels:. 8T0-959-760.clb
Part No SW: 8T0 959 760 B HW: 8T0 959 760 B
Component: MEM-BFS H09 0043
Revision: AA000000 Serial number: 00001001261350
Coding: 00017025002C00000000
Shop #: WSC 06325 000 00000
VCID: 428B7762DD81C4965D-8016
No fault code found.
-------------------------------------------------------------------------------
Address 07: Control Head
Cannot be reached
-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels:. 8Tx-820-043-3Z.clb
Part No SW: 8T1 820 043 AC HW: 8T1 820 043 AC
Component: KLIMA 3 ZONEN H06 0150
Revision: C1000000 Serial number: 01220420090892
Coding: 48022000
Shop #: WSC 06325 000 00000
VCID: 72EBE7A2ADA134160D-8026
No fault code found.
-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519) Labels:. 8K0-907-063.clb
Part No SW: 8K0 907 063 D HW: 8K0 907 063 D
Component: BCM1 1.0 H26 0253
Revision: 05026001 Serial number: 00000000363346
Coding: 26001091063CAF311E00080300003D3D0F9C93C800010161000000
Shop #: WSC 06325 000 00000
VCID: 306F2DAA632D4606BB-8064
Subsystem 1 - Part No SW: 8T1 955 119 C HW: 8J1 955 119 Labels: 1KX-955-119.CLB
Component: WWS 160708 H13 0040
Serial number: SWFBIE 0000624
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: 10453890
Coding: 02532C
Subsystem 3 - Part No SW: 8K0 941 531 AC HW: 8K0 941 531 AC
Component: E1 - LDS H07 0090
Serial number: 00000000001103090173
Subsystem 4 - Part No SW: 8K0 907 410 B HW: 8K0 907 410 B
Component: HOMELINK H01 0010
No fault code found.
-------------------------------------------------------------------------------
Address 0E: Media Player 1
Cannot be reached
-------------------------------------------------------------------------------
Address 0F: Digital Radio
Cannot be reached
-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446) Labels:. 8K0-919-475.clb
Part No SW: 8K0 919 475 F HW: 8K0 919 475
Component: PARKHILFE 4K H06 0040
Revision: 11001001 Serial number: 40140911303983
Coding: 200002
Shop #: WSC 06325 000 00000
VCID: 3C77099ABF65B26617-8068
No fault code found.
-------------------------------------------------------------------------------
Address 14: Susp. Elect. (J250) Labels: None
Part No SW: 8K0 907 364 A HW: 8K0 907 364
Component: DAEMPFUNGS-SG H08 0050
Revision: 00000000 Serial number: 06040900270001
Coding: 050181
Shop #: WSC 06325 000 00000
VCID: 316928AE68274F0EB4-8064
No fault code found.
-------------------------------------------------------------------------------
Address 15: Airbags (J234) Labels:| 8K0-959-655.clb
Part No SW: 8K0 959 655 F HW: 8K0 959 655 F
Component: AirbagVW-AU10 H27 0410
Serial number: 0039KD151TFA
Coding: 303333334330303030304A55304C38543053
Shop #: WSC 06325 000 00000
ASAM Dataset: EV_AirbaECUVWAUDI010 A02007
ROD: EV_AirbaECUVWAUDI010_A02.rod
VCID: 408F7D6ADB8DD6864B-8014
Seat occupied recognition:
Subsystem 1 - Part No SW: 8K0 959 339 HW: 8K0 959 339
Component: BF-Gewichtss. H01 0050
Serial number: 5810000R0900003687
Crash sensor for side airbag: driver side:
Serial number: 6334MSME465371425
Crash sensor for side airbag: front passenger side:
Serial number: 6344MSME466454227
Crash sensor for side airbag: rear: driver side:
Serial number: 6352QSME542719128
Crash sensor for side airbag: rear: passenger side:
Serial number: 6362QSME3C220C2CN
Crash sensor for front airbag: driver side:
Serial number: 63732SME61124A12Q
Crash sensor for front airbag: front passenger side:
Serial number: 63832SME6B125010Q
No fault code found.
-------------------------------------------------------------------------------
Address 16: Steering wheel (J527) Labels:. 8K0-953-568.clb
Part No SW: 8K0 953 568 G HW: 8K0 953 568 G
Component: Lenks.Modul H16 0014
Revision: -------- Serial number: 90315IDF0002M
Coding: 000016
Shop #: WSC 06325 000 00000
VCID: 3E730392A979A07639-806A
Component: E221 - MFL H02 0003
No fault code found.
-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels:. 8T0-920-xxx-17.clb
Part No SW: 8T0 920 981 E HW: 8T0 920 981 E
Component: KOMBIINSTR. H32 0224
Revision: 00200000 Serial number: 9D9207E49
Coding: 8B1501003B00D705020000
Shop #: WSC 06325 000 00000
VCID: 3E730392A979A07639-806A
No fault code found.
-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533) Labels:. 8T0-907-468.clb
Part No SW: 8T0 907 468 Q HW: 8T0 907 468 L
Component: GW-BEM 5CAN-M H10 0095
Revision: FB600048 Serial number: 4800F094178073
Coding: 000303
Shop #: WSC 06325 000 00000
VCID: 4FAD4E561ED339FEC2-801A
Subsystem 1 - Part No SW: 8K0 915 181 E HW: 8K0 915 181 E
Component: J367-BDM H06 0160
Serial number: 19074B19310309
No fault code found.
-------------------------------------------------------------------------------
Address 1B: Active Steering (J792) Labels: None
Part No SW: 8K0 907 144 C HW: 8K0 907 144 C
Component: DYNAMIKLENK. H06 0500
Revision: 50001005 Serial number: --------------
Coding: 840000
Shop #: WSC 06324 000 00000
VCID: 2F6D2ED67E1359FEA2-807A
No fault code found.
-------------------------------------------------------------------------------
Address 1E: Media Player 2
Cannot be reached
-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr (J136) Labels:. 8T0-959-760.clb
Part No SW: 8T0 959 760 B HW: 8T0 959 760 B
Component: MEM-FS H09 0043
Revision: AA000000 Serial number: 00001001261167
Coding: 00197B25002C00000000
Shop #: WSC 06325 000 00000
VCID: 428B7762DD81C4965D-8016
No fault code found.
-------------------------------------------------------------------------------
Address 37: Navigation
Cannot be reached
-------------------------------------------------------------------------------
Address 3C: Lane Change Labels: None
Part No SW: 8K0 907 566 B HW: 4L0 907 566 B
Component: J0769_SWA_MasterH01 0050
Revision: 00H01000 Serial number: 6PZ 009 014-13
Coding: 0000004
Shop #: WSC 06325 000 00000
VCID: 36631BB241496836E1-8062
Subsystem 1 - Part No: 8K0 907 568 B
Component: J0770_SWA_Slave_H01 0050
Subsystem 2 - Serial number: 6PZ 009 014-33
Subsystem 3 - Serial number: 5F24.03.0900H010003CD10273ÿ
Subsystem 4 - Serial number: D10273ÿ
No fault code found.
-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386) Labels:. 8K0-959-793.clb
Part No SW: 8K0 959 793 D HW: 8K0 959 793 D
Component: TSG FA H11 0250
Revision: Serial number: 0000008793444
Coding: 011C13224E00120102
Shop #: WSC 06325 000 00000
VCID: 4189786ED887DF8E44-8014
No fault code found.
-------------------------------------------------------------------------------
Address 46: Central Conv. (J393) Labels:. 8K0-907-064-46.clb
Part No SW: 8K0 907 064 AG HW: 8K0 907 064 AG
Component: BCM2 1.1 H80 0145
Revision: 00002001 Serial number: 0117677757
Coding: 0106069A007A444500B000
Shop #: WSC 06342 000 00000
VCID: 75E1DCBEDCCF232E28-8020
Subsystem 1 - Part No SW: 8K0 959 719 HW: 8K0 959 719
Component: GTO BF H06 0050
Serial number: 00000000000000132775
Subsystem 2 - Part No: 1K0 951 605 C
Component: LIN BACKUP HO H03 1301
Subsystem 3 - Part No SW: 8R0 959 591 HW: 8R0 959 591
Component: J245EE16SKB10 H01 0180
Serial number: 0123456789ABCDEFGHIJ
1 Fault Found:
01565 - Luggage Compartment Light (W3)
009 - Open or Short to Ground
Freeze Frame:
Fault Status: 01101001
Fault Priority: 2
Fault Frequency: 1
Reset counter: 140
Mileage: 235534 km
Time Indication: 0
Date: 2008.05.27
Time: 02:55:37
-------------------------------------------------------------------------------
Address 47: Sound System
Cannot be reached
-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387) Labels:. 8K0-959-792.clb
Part No SW: 8K0 959 792 D HW: 8K0 959 792 D
Component: TSG BF H11 0250
Revision: Serial number: 0000008803772
Coding: 011C13224E00120102
Shop #: WSC 06325 000 00000
VCID: 408F7D6AD38DD6864B-8014
No fault code found.
-------------------------------------------------------------------------------
Address 53: Parking Brake (J540) Labels: 8K0-907-801-V1.clb
Part No SW: 8K0 907 801 G HW: 8K0 907 801 G
Component: EPB Audi B8 H08 0080
Revision: 00000003 Serial number: 10000000222380
Shop #: WSC 00000 000 00000
VCID: 336522A6923B7D1EC6-8066
No fault code found.
-------------------------------------------------------------------------------
Address 55: Headlight Range Labels: 8T0-907-357.clb
Part No SW: 8H0 907 357 A HW: 8H0 907 357
Component: AFS 1 H01 0020
Revision: 00000001 Serial number:
Coding: 0000018
Shop #: WSC 06324 000 00000
VCID: 306F2DAAA32D4606BB-8064
Subsystem 1 - Part No: 7L6 941 329 C
Component: AFS-Modul links H01 0004
Subsystem 2 - Part No: 7L6 941 329 C
Component: AFS-Modul rechtsH01 0004
No fault code found.
-------------------------------------------------------------------------------
Address 56: Radio
Cannot be reached
-------------------------------------------------------------------------------
Address 65: Tire Pressure (J502) Labels: 8K0-907-273.clb
Part No SW: 8K0 907 273 A HW: 8K0 907 273 A
Component: J502-RDK H03 0250
Revision: 00001001 Serial number: 13374795152427
Coding: 0CD154
Shop #: WSC 06324 000 00000
VCID: 306F2DAA632D4606BB-8064
No fault code found.
-------------------------------------------------------------------------------
Address 67: Voice Control
Cannot be reached
-------------------------------------------------------------------------------
Address 6C: Back-up Cam. Labels: 8T0-907-441.clb
Part No SW: 8T0 907 441 B HW: 4L0 907 441 A
Component: J772__Rearview 0070
Revision: --H12--- Serial number: 525PA8-J9290T6
Coding: 1001008
Shop #: WSC 06325 000 00000
VCID: 377D16B64643913EFA-8062
No fault code found.
-------------------------------------------------------------------------------
Address 77: Telephone
Cannot be reached
End-------------------------(Elapsed Time: 03:57)--------------------------
These two connectors run to the fan. The one circled in red is the one that shuts off the constantly running fan when unplugged.
Re-soldered the pin and re-installed. Issue confirmed. My fans are no longer running non-stop!
I guess last confirmation will be to run the output test through VCDS to ensure the fans will turn on; but that will be for another time. I'm confident I have found the solution.
After that I just have to put the car back together.
Brilliant diagnostic! My 2010 S5 has identical symptoms, except no fault codes until the battery drains to zero. I'm going to find that connector. The photos are very well done, and I must say this is the only post I've found with direct relevance to my observed problem. Others were about leaky ECM cover and flooded relays that were easily ruled out. Thank you for taking the time to to document your work.