ACC fault!

[Lomnex]

I get a message saying ACC fault!, that deactivates the whole cruisecontrol.

Got this log
Wednesday,18,April,2012,21:55:02:21071
VCDS Version: Release 11.11.3 (x64)
Data version: 20120401



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


Chassis Type: 3C0
Scan: 01 02 03 08 09 10 13 14 15 16 17 18 19 25 2E 37 42 44 46 47
4F 52 53 55 56 5D 62 65 6C 72 77

VIN: WVWZZZ3CZ9E562861

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
10-Park/Steer Assist -- Status: OK 0000
13-Auto Dist. Reg -- Status: Malfunction 0010
14-Susp. Elect. -- Status: Malfunction 0010
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
18-Aux. Heat -- Status: Malfunction 0010
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
2E-Media Player 3 -- Status: OK 0000
37-Navigation -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Xenon Range -- Status: OK 0000
56-Radio -- Status: Malfunction 0010
5D-Operations -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
65-Tire Pressure -- Status: Malfunction 0010
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: Malfunction 0010

-------------------------------------------------------------------------------
Address 01: Engine (CBB) Labels: 03L-906-022-CBA.clb
Part No SW: 03L 906 022 QG HW: 03L 907 309
Component: R4 2,0L EDC F000AG 6212
Revision: 13H01--- Serial number: VWZCZ000000000
Coding: 0000078
Shop #: WSC 84224 928 600520
VCID: 7AF00E4C35C4789

1 Fault Found:
053283 - Please Check Fault Codes in Control Module for Automatic Distance Regulation
U1023 - 000 - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 6
Fault Frequency: 8
Mileage: 55781 km
Time Indication: 0
Date: 2097.14.21
Time: 06:37:41

Freeze Frame:
RPM: 1978 /min
Speed: 101.0 km/h
(no units): 0.00
(no units): -0.40
(no units): 0.0
Bin. Bits: 00000110
(no units): 0.0

Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 02E-300-0xx.lbl
Part No SW: 02E 300 051 T HW: 02E 927 770 AJ
Component: GSG DSG AG6 431 1912
Revision: 04843012 Serial number: 00000805210504
Coding: 0000020
Shop #: WSC 44551 111 44551
VCID: 244C1034E7C0DE9

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 3C0-614-109-C4.clb
Part No SW: 3C0 614 109 R HW: 3C0 614 109 R
Component: J104 C4 440 V3 0013
Revision: --025--- Serial number: 00000795060827
Coding: 0024877
Shop #: WSC 05311 000 00000
VCID: 2D5AF510B40A1F1

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255) Labels: 5K0-907-044.clb
Part No SW: 5K0 907 044 AM HW: 5K0 907 044 AM
Component: Climatronic 130 0305
Revision: 00002001
Coding: 0000000000
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_Climatronic A01001
ROD: EV_Climatronic_VW46.rod
VCID: 76E81A7CC9DC1C9

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 3C0-937-049-30-H.lbl
Part No SW: 3C8 937 049 E HW: 3C8 937 049 E
Component: Bordnetz-SG H54 2602
Revision: 00H54000 Serial number: 00000009495333
Coding: EFE28FCB01041A0047978F0017000000000BFB476440216D17 0000000000
Shop #: WSC 40410 222 90895
VCID: 336EE368522E491

Subsystem 1 - Part No: 3C8 955 119 Labels: 1KX-955-119.CLB
Component: Wischer 200109 022 0602
Coding: 00046997
Shop #: WSC 40410

Subsystem 2 - Part No: 1K0 955 559 AH Labels: 1K0-955-559-AG.CLB
Component: RLS 310309 054 0402
Coding: 00471277
Shop #: WSC 40410

2 Faults Found:
02745 - Bulb for Daytime Running Light; Left
010 - Open or Short to Plus
Freeze Frame:
Fault Status: 01101010
Fault Priority: 2
Fault Frequency: 2
Reset counter: 84
Mileage: 50156 km
Time Indication: 0

Freeze Frame:
ON
Voltage: 11.50 V
ON
ON
OFF
OFF
OFF

02746 - Bulb for Daytime Running Light; Right
010 - Open or Short to Plus
Freeze Frame:
Fault Status: 01101010
Fault Priority: 2
Fault Frequency: 1
Reset counter: 84
Mileage: 50260 km
Time Indication: 0

Freeze Frame:
ON
Voltage: 11.75 V
ON
ON
OFF
OFF
OFF


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J791) Labels: 1T0-919-475.clb
Part No SW: 1T0 919 475 L HW: 1T0 919 475
Component: PARKHILFE PLA H07 0021
Revision: -------- Serial number: 06530906802325
Coding: 300107
Shop #: WSC 05314 000 00000
VCID: 448CB0B4C780FE9

No fault code found.

-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg Labels: None
Part No SW: 3C0 907 567 J HW: 3C0 907 567 J
Component: AC201 RDW A 031 0232
Revision: 00031000 Serial number: 00000000040543
Coding: 0010000
Shop #: WSC 05311 000 08193
VCID: 3260E66CAD34409

2 Faults Found:
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 3
Fault Frequency: 14
Reset counter: 116
Mileage: 52380 km
Time Indication: 0
Date: 2030.14.08
Time: 20:44:43

Freeze Frame:
Count: 94

00272 - Function Disabled due to Electromagnetic Interference
012 - Electrical Fault in Circuit - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101100
Fault Priority: 7
Fault Frequency: 8
Reset counter: 124
Mileage: 55764 km
Time Indication: 0
Date: 2097.14.20
Time: 15:22:16

Freeze Frame:
Count: 16


-------------------------------------------------------------------------------
Address 14: Susp. Elect. (J250) Labels: None
Part No SW: 3C0 907 376 HW: 3C0 907 376
Component: DAEMPFUNGS-SG H07 0069
Revision: 00000000 Serial number: 12030906590002
Coding: 030180
Shop #: WSC 05314 000 00000
VCID: E6C8CA3C117C6C9

1 Fault Found:
01319 - Control Module for Distance Control (J428)
013 - Check DTC Memory - Intermittent
Freeze Frame:
Fault Status: 00101101
Fault Priority: 6
Fault Frequency: 8
Reset counter: 124
Mileage: 55764 km
Time Indication: 0
Date: 2097.14.20
Time: 15:22:16

Freeze Frame:
Bin. Bits: 00000000 00000001


-------------------------------------------------------------------------------
Address 15: Airbags Labels: 5N0-959-655.lbl
Part No SW: 5N0 959 655 J HW: 5N0 959 655 J
Component: J234__300 VW10 HI 1916
Revision: 20013000 Serial number: 003E2P5P610
Coding: 0012336
Shop #: WSC 05311 000 00000
VCID: 448CB0B40780FE9

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 3C0-953-549-SW25.lbl
Part No SW: 3C0 953 549 AJ HW: 3C0 953 549 AJ
Component: J0527 0030
Revision: 00032000 Serial number: 3C5953507CR
Coding: 0201721
Shop #: WSC 05314 000 00000
VCID: 74EC207417A00E9

Subsystem 1 - Part No: 3C8 959 537 B
Component: E221__MFL-TAP H4ÿ 0021
Coding: 00000226
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels: 3C8-920-xxx-17.clb
Part No SW: 3C8 920 870 C HW: 3C8 920 870 C
Component: KOMBI H05 0110
Serial number: 00000000000000
Coding: 140D00
Shop #: WSC 05314 115 00000
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04040
ROD: EV_Kombi_UDS_VDD_RM09_VW46.rod
VCID: 2B5EFB08421E111

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat Labels: None
Part No: 1K0 815 007 BQ
Component: Standheizer 022 3905
Revision: 00022000 Serial number: 09017794000000
Coding: 0021012
Shop #: WSC 05311 000 00000
VCID: 74EC207417A00E9

2 Faults Found:
01408 - Under-Voltage Shut-Off (fixed Value)
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 3
Reset counter: 40
Mileage: 1048575 km
Time Indication: 0
Date: 2127.15.31
Time: 16:00:01

Freeze Frame:
Part Throttle
Temperature: 93.0°C
Temperature: -48.0°C

00664 - Fuel gauge
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 0
Fault Frequency: 6
Reset counter: 40
Mileage: 52258 km
Time Indication: 0
Date: 2029.14.26
Time: 19:36:32


-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 3C0-907-530.lbl
Part No SW: 3C0 907 530 J HW: 3C0 907 951
Component: J533__Gateway H13 0152
Revision: H13 Serial number: 2900R0932080FD
Coding: FDAD7F07506E13009002
Shop #: WSC 05314 000 00000
VCID: 285404049BE83A9

No fault code found.

-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 3C0-959-433-25.clb
Part No SW: 3C0 959 799 H HW: 3C0 959 799 H
Component: IMMO 070 0383
Revision: 00070000 Serial number: VWZCZ000000000
Shop #: WSC 131071 1023 2097151
VCID: 3E78C25C696C949

Part No: 3C0 905 861 G
Component: ELV 027 0380
3C0905861G ELV 027 0380

No fault code found.

-------------------------------------------------------------------------------
Address 2E: Media Player 3 (J650) Labels: 5N0-035-342.lbl
Part No SW: 5N0 035 342 B HW: 5N0 035 342 B
Component: SG EXT.PLAYER H13 0084
Revision: A1001003 Serial number: 7667393549
Coding: 010000
Shop #: WSC 05314 000 00000
VCID: 26480A3C51FC2C9

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation (J0506) Labels: 1T0-035-680.clb
Part No SW: 1T0 035 680 D HW: 1T0 035 680 B
Component: RNS-MID H04 3810
Revision: AB001001 Serial number: VWZ6Z7J7091003
Coding: 06050000010000920000
Shop #: WSC 05314 000 00000
ASAM Dataset: ------------------------- ------
VCID: 2F66EF187E066D1

1 Fault Found:
00857 - CD Changer Unit (R41)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 5
Fault Frequency: 254
Reset counter: 84
Mileage: 49080 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver Labels: 1K0-959-701-MAX3.lbl
Part No SW: 1T0 959 701 L HW: 1K0 959 793 P
Component: J386 TUER-SG FT 1533
Revision: 71009005 Serial number: 00000757598119
Coding: 0004279
Shop #: WSC 05311 000 00000
VCID: 4084BCA41398E29

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 5N1-909-144.clb
Part No SW: 5N1 909 144 J HW: 5N1 909 148 F
Component: J500__APA-BS KL.071 0503
Revision: 1AH02250 Serial number: 00090360086602
Coding: 0000258
Shop #: WSC 05311 000 00000
VCID: 3972D1407042B31

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 3C0-959-799-46.clb
Part No SW: 3C0 959 799 H HW: 3C0 959 799 H
Component: 09 KESSY PQ46 R 070 0231
Revision: 00070000 Serial number: VWZCZ000000000
Coding: 00910A0001C60E763602941570004FCE70580103242498
Shop #: WSC 05311 000 00000
VCID: 3E78C25C696C949

Part No: 1K8 951 605
Component: LIN BACKUP HORN H09 9002

Part No: 3C0 951 171 C
Component: Neigungssensor 004 0611

Part No: 3C0 951 171 C
Component: Innenraumueberw.004 0611

1 Fault Found:
00323 - Vehicle Inclination Sensor (G384)
008 - Implausible Signal - Intermittent
Freeze Frame:
Fault Status: 00101000
Fault Priority: 4
Fault Frequency: 1
Reset counter: 91
Mileage: 54888 km
Time Indication: 0
Date: 2096.14.21
Time: 16:04:03


-------------------------------------------------------------------------------
Address 47: Sound System Labels: 3C0-035-456.lbl
Part No SW: 3C8 035 456 C HW: 3C8 035 456 C
Component: DSP 10 Kanal 0070
Revision: 00H05001 Serial number: 75805001016405
Shop #: WSC 00000 000 00000
VCID: 285404049BE83A9

No fault code found.

-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II (J533_) Labels: 1K0-907-532.clb
Part No SW: 1K0 907 532 HW: 3C0 907 951
Component: J533__Gateway H13 0152
Revision: -------- Serial number: 2900R0932080FD
Coding: 01030101
Shop #: WSC 05314 000 00000
VCID: E6C8CA3C117C6C9

Subsystem 1 - Part No SW: 6R0 959 591 HW: 6R0 959 591
Component: J245/J878 H04 0054
Coding: 000006

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. Labels: 1K0-959-702-MAX3.lbl
Part No SW: 1T0 959 702 L HW: 1K0 959 792 P
Component: J387 TUER-SG BT 1533
Revision: 71009005 Serial number: 00000751498202
Coding: 0004278
Shop #: WSC 05311 000 00000
VCID: 4182B9A01892EB1

No fault code found.

-------------------------------------------------------------------------------
Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C8 907 801 A HW: 3C8 907 801 B
Component: J540 EPB3 VW-10498 0003
Revision: 010 Serial number: 00000000036213
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 285404049BE83A9

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 5M0-907-357-V2.lbl
Part No SW: 5M0 907 357 C HW: 5M0 907 357 C
Component: AFS-Steuergeraet 0142
Revision: 00H04000 Serial number:
Coding: 3493064
Shop #: WSC 05311 000 00000
VCID: 346CE07457204E9

Subsystem 1 - Part No: 1K0 941 329
Component: AFS-Lst.-Modul l 0003
Coding: 00000053

Subsystem 2 - Part No: 1K0 941 329
Component: AFS-Lst.-Modul r 0003
Coding: 00000053

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J0506) Labels: 1T0-035-680.clb
Part No SW: 1T0 035 680 D HW: 1T0 035 680 B
Component: RNS-MID H04 3810
Revision: AB001001 Serial number: VWZ6Z7J7091003
Coding: 06050000010000920000
Shop #: WSC 05314 000 00000
ASAM Dataset: ------------------------- ------
VCID: 2F66EF187E066D1

1 Fault Found:
00857 - CD Changer Unit (R41)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 5
Fault Frequency: 254
Reset counter: 84
Mileage: 49080 km
Time Indication: 0


-------------------------------------------------------------------------------
Address 5D: Operations Labels: 3C0-035-151.lbl
Part No SW: 3C0 035 151 D HW: 3C0 035 151 D
Component: J738 012 0020
Revision: 00012000
Shop #: WSC 00000 000 00000
VCID: 193231C0D082931

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left Labels: 1K0-959-703-GEN3.lbl
Part No SW: 3C8 959 703 B HW: 1K0 959 795 Q
Component: J388 TUER-SG HL 0309
Revision: 43004101 Serial number: 00000000833181
Coding: 0000144
Shop #: WSC 05311 000 00000
VCID: 3162E960A8327B1

No fault code found.

-------------------------------------------------------------------------------
Address 65: Tire Pressure Labels: 3C0-959-433-65.lbl
Part No SW: 3C0 959 799 H HW: 3C0 959 799 H
Component: RDK 0453
Revision: 00070000 Serial number: VWZCZ000000000
Coding: 0161211
Shop #: WSC 05311 000 00000
VCID: 3E78C25C696C949

2 Faults Found:
01521 - Sensor for Tire Pressure
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 4
Fault Frequency: 1
Mileage: 55668 km
Time Indication: 0
Date: 2097.14.17
Time: 15:10:19

01477 - System Switched Off
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 4
Fault Frequency: 1
Mileage: 55710 km
Time Indication: 0
Date: 2097.14.19
Time: 17:07:54


-------------------------------------------------------------------------------
Address 6C: Back-up Cam. Labels: 5N0-907-441.clb
Part No SW: 3C8 907 441 HW: 3C8 907 441
Component: J772__Rearview 0022
Revision: 00H06000 Serial number: 525PA8-J930343
Coding: 0020008
Shop #: WSC 05311 000 00000
VCID: E7D6C738D676751

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right Labels: 1K0-959-704-GEN3.lbl
Part No SW: 3C8 959 704 B HW: 1K0 959 794 Q
Component: J388 TUER-SG HR 0309
Revision: 43004101 Serial number: 00000000822972
Coding: 0000144
Shop #: WSC 05311 000 00000
VCID: 3260E66CAD34409

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone (J412) Labels: 7P6-035-730.clb
Part No SW: 7P6 035 730 F HW: 7P6 035 730 F
Component: TELEFON H09 2730
Revision: 1B001001 Serial number: 00007660978650
Coding: 0A00000000010100
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_UHVNA A01015
ROD: EV_UHVNA_VW46.rod
VCID: 356ADD70945A571

2 Faults Found:
9457427 - Negative output audio channel for speech/telephone
B104F 13 [009] - Open Circuit
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 1
Reset counter: 110
Mileage: 51031 km
Date: 2028.14.30
Time: 18:50:13

13636352 - Control Module Not Coded
U1013 00 [009] - -
Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 4
Fault Frequency: 1
Reset counter: 105
Mileage: 50851 km
Date: 2028.14.28
Time: 14:51:56


End ---------------------------------------------------------------------



The only fault i got left is:
-------------------------------------------------------------------------------
Address 13: Auto Dist. Reg Labels: None
Part No SW: 3C0 907 567 J HW: 3C0 907 567 J
Component: AC201 RDW A 031 0232
Revision: 00031000 Serial number: 00000000040543
Coding: 0010000
Shop #: WSC 05311 000 08193
VCID: 3260E66CAD34409

2 Faults Found:
00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent
Freeze Frame:
Fault Status: 00100010
Fault Priority: 3
Fault Frequency: 14
Reset counter: 116
Mileage: 52380 km
Time Indication: 0
Date: 2030.14.08
Time: 20:44:43

Freeze Frame:
Count: 94

00272 - Function Disabled due to Electromagnetic Interference
012 - Electrical Fault in Circuit - Intermittent - MIL ON
Freeze Frame:
Fault Status: 10101100
Fault Priority: 7
Fault Frequency: 8
Reset counter: 124
Mileage: 55764 km
Time Indication: 0
Date: 2097.14.20
Time: 15:22:16

Freeze Frame:
Count: 16


Some days it work, other days it only work for 5minutes and other days just 2minutes.
I dont understand whats wrong with it, anyone seen this before?

Thanks

[Lomnex]

anyone?

[jef@rosstech]

First off, thank you for posting a full Auto-Scan!

Looking at the ACC codes:

00532 - Supply Voltage B+
002 - Lower Limit Exceeded - Intermittent

The module is not happy with the battery voltage, too low. Now I've seen this code in all kinds of modules over the years. Most common cause is you have the ignition on, but the engine not running and after a while the battery voltage dips below X voltage and modules can start to flag this code. In most cases it is a non-issue that doesn't come back.

But in this case, if it keeps coming back, I would would want to make sure the wiring harness for this module has good clean connections. If there is something like a loose ground point then this code could keep coming back.

Normally the airbag module is the first one to bitch and moan about low battery voltage. Since I didn't see that code in the airbag module, I would suspect the car's battery and charging system is up to par... doesn't hurt to double check it though.... but the more I think about this, the more likely I feel you could have a poor connection issue for the ACC. This could be a ground point, fuse, or even an cracked soldier joint on the circuit board of the module itself.... tracking down an issue like this can be .... fun. Even better, it works at times...

00272 - Function Disabled due to Electromagnetic Interference
012 - Electrical Fault in Circuit - Intermittent - MIL ON

eh... are you operating a pirate radio station from your car? This could be tied back to the voltage issue. Hopefully someone smarter than me will chime in on this one.

[Lomnex]

Thanks for getting back to me jef.

I replaced the main battery as I though that might have been the issue at first, the second battery was running good at 14,4V. So It cant be the battery power anymore. Connections to both batterys are good.

The problem is getting stranger as im looking into it.. I only get the "ACC fault" if the car has been sitting in the sun, and is hotter than our normal 10*C. Is there any relays controlling this thing? I read somewhere about a relay that screwed up, but cant find back to the site I read about it..

No pirate radiostation in my car, draining power

[ohaue]

>Lomnex wrote: Is there any relays controlling this thing? I read somewhere about a relay that screwed up, but cant find back to the site I read about it..

Yes there is a relay controling the ACC. It is called J788 and is located between the others relays under the instrument cluster. The relay has partnumber: 3C0 951 253 A. You can identify it by the number 479 in the front of the relay. It has nothing to do with power i think, but something to do with the CAN bus.

Don't know if this help

Best regards
Otto

[Spacewalker]

Relay 479 only disconecting ACC from CAN. I have also this problem

00272 - Function Disabled due to Electromagnetic Interference

Sometime in winter when was -25 degree , last time even when ACC was not in use.

[Lomnex]

I cant find Relay 479, everything i find behind the box on the left side of the steering wheel are relays with numbers that say 449 (small grey ones) and two larger 460. Any idea of the location or what it supposed to say next to the relay on the black plastic?

Reason I havent followed up on this thread is because its been working without any problems for over a month now...

Like spacewalker I first started having this problem driving up in the mountains with large snowpiles on both sides of the road, but back in town there was no problem. Thought it might be allergic to snow

[dready95]

Hi all,

I have a touareg V10 tdi, and I have the same issue.
Yesterday I went through the "02 - engine" with VAG-COM and I cleared all messages.
ACC was working fine, but 1 or 2 mn after that while driving the car on the highway, the acc was in fault again. I stopped, cleared the error message again and ACC was on again..

Any ideas of what it can be? I can buy another "acc radar" which is placed in the VW sign in the front, but as it cost 200€ I don't want to spend that money for nothing....

Thank you guys

[Lomnex]

My problem got solved after a short trip to the garage.

Rear brakelight bulbs was giving an error to system, but was working...
Replaceing both brakelight bulbes fixed the issue and the ACC has been working since.

Cost me 250$ to solve this idiotic problem at the garage as the prices in Norway for one hour is very high.