Audi Q7 02645 - Valves for Level Control System Mechanical Malfunction

   #1  

Mark Hudson

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Hi, We have a problem with a 2012 Audi Q7 3.0TDI.

When the vehicle is stationary the air suspension operates perfectly. Upon driving all is well until you slow down to less than 15mph whether that be by braking or engine braking (gearing down), at this point the air suspension fault light begins flashing. The fault entered is 02645 - Valves for Level Control System Mechanical Malfunction. This clears if you switch the vehicle on and off until you drive and slow again.

There are no obvious problems with the functionality of the air suspension, it operates seamlessly when the vehicle is stationary and the fault light is off. We have tested the wiring, checked for leaks, exchanged all ride height sensors and the valve block from a known good car which did not alter the fault. I have also reconditioned the compressor assembly by installing a new piston ring and renewing the desiccant in the drier.

Attached is an Auto scan when the fault is present (it clears the codes when the vehicle is switched off and on)
I would be grateful for any ideas/tips/solutions that anyone has to offer.

Thanks In Advance

Mark

Code:
Thursday,27,June,2019,20:47:02:21133
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 19.6.0.2 (x64)  HEX-NET CB: 0.4505.4
Data version: 20190529 DS308.0
www.Ross-Tech.com

Dealer/Shop Name: Jon-Son Motors
Workshop Code: 210 01642 000002

VIN: WAUZZZ4LXDD018927   License Plate: GV62GKN
Mileage: 118790km-73812mi   Repair Order: 



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


Chassis Type: 4L-AU56 (4F0)
Scan: 01 02 03 05 08 09 10 15 16 17 18 19 34 3D 42 46 4F 52 55 56
          5F 62 6C 6D 6F 72

VIN: WAUZZZ4LXDD018927   Mileage: 118790km-73812miles

01-Engine -- Status: OK 0000
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
18-Aux. Heat -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
34-Level Control -- Status: Malfunction 0010
3D-Special Function -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
6F-Centr. Conv. II -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CRCA)       Labels:. 059-907-401-V2.clb
   Part No SW: 4L2 910 401 B    HW: 4L0 907 401 C
   Component: 3.0TDI EDC17  H40 0001  
   Revision: 53H40---    Serial number:               
   Coding: 2A2A4012A52701020000
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_ECM30TDI0114L2910401B 001001
   ROD: EV_ECM30TDI0114L1910401H.rod
   VCID: 23063C252A877557AC-8076

No fault code found.
Readiness: 0 0 0 0 0 

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217)       Labels:| 0C8-927-750.clb
   Part No SW: 0C8 927 750 AL    HW: 0C8 927 750 AL
   Component: AL1000 AISIN  001 2096  
   Serial number:               
   Coding: 001578
   Shop #: WSC 39997 002 1048576
   ASAM Dataset: EV_TCMAL991031 002112
   ROD: EV_TCMAL991031_002.rod
   VCID: 76A03571C995B0FFBB-8022

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels:. 4L0-910-517-V2.clb
   Part No SW: 4L0 910 517 M    HW: 4L0 614 517 L
   Component: ESP ALLRAD MK25E1   0020  
   Revision: 00H02001    
   Coding: 2200689
   Shop #: WSC 31414 790 00001
   VCID: 3424CF795769E2EF45-8060

No fault code found.

-------------------------------------------------------------------------------
Address 05: Acc/Start Auth.        Labels:. 4F0-910-852.clb
   Part No SW: 4F0 910 852 B    HW: 4F0 905 852 H
   Component: FBSAUDIC6 ELV   H08 0200  
   Revision: 00H08000    Serial number: 10603702030064
   Coding: 0000211
   Shop #: WSC 52553 001 1048576
   VCID: 2502223DECB38B67C2-8070

   Subsystem 1 - Part No: 4F0 910 132 E
   Component: FBSAUDIC6 EZS   H04 0020

   Subsystem 2 - Part No: 4F0 910 220 K
   Component: FBSAUDIC6 IDG   H01 0053

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC (J255)       Labels: None
   Part No SW: 4L0 910 043 D    HW: 4L0 820 043 AP
   Component: KLIMA 4 ZONEN H15 0070  
   Revision: 00---031    Serial number: 00000030262459
   Coding: 01013512
   Shop #: WSC 01642 210 00002
   VCID: 2502223D2CB38B67C2-8070

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels: 4F0-910-279.lbl
   Part No SW: 4F0 910 279 AH    HW: 4F0 907 279 D
   Component: ILM Fahrer      H31 0400  
   Revision: 00000000    Serial number: 4F0907279     
   Coding: 0033121
   Shop #: WSC 31414 790 00001
   VCID: 6FAE00157ECF813778-803A

   Subsystem 1 - Part No: 4L2 910 113   Labels: 1KX-955-119.CLB
   Component: Wischer AU716   H13 0110  
   Coding: 00064792
   Shop #: WSC 31414  

   Subsystem 2 - Part No: 8K0 910 557   Labels: 8K0-955-559.CLB
   Component: REGENLICHTSENSORH04 0003  
   Coding: 00150059
   Shop #: WSC 31414  

No fault code found.

-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446)       Labels:| 4L0-919-475-7X2.clb
   Part No SW: 4L0 919 475 A    HW: 4H0 919 475 C
   Component: PARKHILFE 8K  H07 0011  
   Revision: 11001001    Serial number: 55961230400551
   Coding: 24031F
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_EPHVA18AU7160000 001001
   ROD: EV_EPHVA18AU7160000.rod
   VCID: 3424CF799F69E2EF45-8060

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 4L0-910-655.lbl
   Part No SW: 4L0 910 655 D    HW: 4L0 959 655 C
   Component: 71 AIRBAG AUDI8RH43 0230  
   Revision: 04H43000    Serial number: 00399D09SM3A  
   Coding: 0014129
   Shop #: WSC 31414 790 00001
   VCID: 2E10DD11B945C83F33-807A

   Subsystem 1 - Serial number: 6332QSME09250E48H

   Subsystem 2 - Serial number: 6342QSME09252476B

   Subsystem 3 - Serial number: 6352QSME61221E5EM

   Subsystem 4 - Serial number: 6362QSME61223F56I

   Subsystem 5 - Serial number: 63734SME70191856 

   Subsystem 6 - Serial number: 63834SME68191A4CA

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 4F0-910-549.lbl
   Part No SW: 4F0 910 549 B    HW: 4F0 953 549 E
   Component: J0527               0830  
   Revision: 00H08000    Serial number: 90026122500226
   Coding: 0102142
   Shop #: WSC 31414 790 00001
   VCID: 281C2B099BA1960FF9-807C

   Subsystem 1 - Part No: XXXXXXXXXXX 
   Component: E0221           H03 0040

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285)       Labels:. 4L0-920-xxx-17.clb
   Part No SW: 4L0 920 985 N    HW: 4L0 920 985 N
   Component: KOMBIINSTR.   H35 0316  
   Revision: 00000000    Serial number: NGC51ENAD     
   Coding: 3356630400012600010404
   Shop #: WSC 31414 790 00001
   VCID: 3FCE9055AE2F31B7A8-806A

No fault code found.

-------------------------------------------------------------------------------
Address 18: Aux. Heat        Labels: 4L0-910-105.lbl
   Part No SW: 4L0 910 105     HW: 4L0 815 071 G
   Component: Heizgeraet      H09 0140  
   Revision: 0000000C    Serial number: 00000009021078
   Coding: 0000101
   Shop #: WSC 31414 790 00001
   VCID: 608C7329B3112E4FF1-8034

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 4F0-907-468.clb
   Part No SW: 4F0 907 468 R    HW: 4F0 907 468 F
   Component: GW-BEM 4CAN-M H06 0058  
   Revision: LB600036    Serial number: 3600L12B078021
   Coding: 00CF07
   Shop #: WSC 31414 790 00001
   VCID: 3E30ED51A92538BFA3-806A

   Subsystem 1 - Part No SW: 8K0 915 181 D    HW: 8K0 915 181 D
   Component: J367-BDM  H07 0125 
   Serial number: 00000000002790539685

   Subsystem 2 - Part No SW: 8K0 959 663     HW: 8K0 959 663 
   Component: J532_DCDCStab  H17 0042 
   Serial number: 12312000723021200181

No fault code found.

-------------------------------------------------------------------------------
Address 34: Level Control        Labels: 4L0-910-553.lbl
   Part No SW: 4L0 910 553 L    HW: 4L0 907 553 E
   Component: LUFTFDR.-CDC    H04 7890  
   Revision: --H04001    Serial number: 15.1528-0194.2
   Coding: 0015510
   Shop #: WSC 01642 210 00002
   VCID: 3326CC655267E5D75C-8066

1 Fault Found:
02645 - Valves for Level Control System 
            003 - Mechanical Failure
             Freeze Frame:
                    Fault Status: 11100011
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 163
                    Mileage: 118790 km
                    Time Indication: 0
                    Date: 2019.06.27
                    Time: 20:42:01

             Freeze Frame:
                    Error Code: 141


-------------------------------------------------------------------------------
Address 3D: Special Function        Labels: 8K0-907-440.clb
   Part No SW: 8K0 907 440     HW: 8K0 907 440 
   Component: STS             H04 0040  
   Revision: S0H04000    Serial number: 00000000070654
   Coding: 01010101000000000001000202
   Shop #: WSC 31414 790 00001
   VCID: 6B9614054AD77D1754-803E

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver (J386)       Labels:. 4F0-959-793.clb
   Part No SW: 4F0 959 793 T    HW: 8K0 959 793 M
   Component: TSG FA        H12 0362  
   Revision:             Serial number: 0000044625321 
   Coding: 011F06205061440004
   Shop #: WSC 31414 790 00001
   VCID: 48DC8B89FBE1760F19-801C

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 4L0-910-289.lbl
   Part No SW: 4L0 910 289 K    HW: 4L0 907 289 K
   Component: Komfortgeraet   H12 0130  
   Revision: 0130 ---    Serial number: 01866533730000
   Coding: 3809787
   Shop #: WSC 31414 790 00001
   VCID: 383CFB494B01068F69-806C

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

   Subsystem 2 - Part No: 4F0 910 177 
   Component: Innenraumueberw.H01 0020

No fault code found.

-------------------------------------------------------------------------------
Address 4F: Centr. Electr. II        Labels: 4F0-910-280.lbl
   Part No SW: 4F0 910 280     HW: 4F0 907 280 E
   Component: ILM Beifahrer   H16 0100  
   Revision:             Serial number: 00000000319711
   Coding: 0011101
   Shop #: WSC 31414 790 00001
   VCID: 5EF04DD1896518BFC3-800A

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass. (J387)       Labels:. 4F0-959-792.clb
   Part No SW: 4F0 959 792 T    HW: 8K0 959 792 M
   Component: TSG BF        H12 0362  
   Revision:             Serial number: 0000044664987 
   Coding: 011F06205061440004
   Shop #: WSC 31414 790 00001
   VCID: 47DE88B5F6FF797710-8012

No fault code found.

-------------------------------------------------------------------------------
Address 55: Headlight Range (J431)       Labels:| 8X0-907-357.clb
   Part No SW: 8X0 907 357 C    HW: 8X0 907 357 B
   Component: ****LWR12**** H02 0020  
   Serial number: 121106-0004-102
   Coding: 11476F1010000500
   Shop #: WSC 31414 790 00001
   ASAM Dataset: EV_HeadlRegulBasic 005001
   ROD: EV_HeadlRegulBasic.rod
   VCID: 42C899A1D5DD5C5FC7-8016

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (R)       Labels: Redir Fail!
   Part No SW: 4G0 035 056 G    HW: 4G0 035 056 
   Component: Radio U STD   H60 0121  
   Revision: AB001007    Serial number: 230K/0C2659626
   Coding: 010003020100000000
   Shop #: WSC 31414 790 00001
   VCID: 2502223D2CB38B67C2-8070

No fault code found.

-------------------------------------------------------------------------------
Address 5F: Information Electr. (J794)       Labels:. 4E0-035-6xx-5F.clb
   Part No SW: 4L2 035 670 C    HW: 4L2 035 670 D
   Component: H-BNT-EU      H45 0639  
   Revision: --------    Serial number: 220KQ0C7506221
   Coding: 180101060004D3EF010003556F632003040000000100000000
   Shop #: WSC 31414 790 00001
   VCID: 2A18D10145ADA41FEF-807E

   Subsystem 1 - Part No: 8R0 060 884 AR
   Component: ECE 2013  1505 

   Subsystem 2 - Part No SW: 8R0 919 604     HW: 8R0 919 604 
   Component: DU7 High  H41 0104 
   Serial number: A130KV0C2584504     

   Subsystem 3 - Part No SW: 4L0 919 614 B    HW: 4L0 919 614 B
   Component: E0380 Bedient  H01 0060 
   Serial number: 00000002037158      

   Subsystem 4 - Part No: 8R0 060 961 E
   Component: CD-Database  4949 

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left (J388)       Labels:. 4F0-959-795.clb
   Part No SW: 4F0 959 795 P    HW: 4F0 959 795 P
   Component: TSG HL        H11 0362  
   Revision:             Serial number: 0000044600918 
   Coding: 010E06204061230004
   Shop #: WSC 31414 790 00001
   VCID: 46C085B1F1F5607FEB-8012

No fault code found.

-------------------------------------------------------------------------------
Address 6C: Back-up Cam.        Labels: 4L0-910-441.clb
   Part No SW: 4L0 910 441 B    HW: 4L0 907 441 B
   Component: J772__Rearview      0030  
   Revision: --H07---    Serial number: 525PA8-J2941RQ
   Coding: 1021001
   Shop #: WSC 31414 790 00001
   VCID: 2502223DECB38B67C2-8070

No fault code found.

-------------------------------------------------------------------------------
Address 6D: Trunk Elect.        Labels: None
   Part No SW: 4L0 910 945     HW: 4L0 827 851 E
   Component: ValeoHeckdeckel H57 0500  
   Revision: --H57001    Serial number: E5030000B     
   Shop #: WSC 98765 666 38354
   VCID: 6C9417194FD97A2F5D-8038

   Subsystem 1 - Part No: 4L0 910 946 
   Component: ValeoHeckdeckel H57 0500

   Subsystem 2 - Serial number: 6
ó

   Subsystem 3 - Serial number: RD12.11.12--H57001002G0247ÿ

   Subsystem 4 - Serial number: 2G0247ÿ

No fault code found.

-------------------------------------------------------------------------------
Address 6F: Centr. Conv. II        Labels:. 4L0-910-290.lbl
   Part No SW: 4L0 910 290     HW: 4L0 907 290 
   Component: ILM HINTEN 2    H08 0080  
   Revision: AAH08080    Serial number: 130522439-----
   Coding: 0000001
   Shop #: WSC 31414 790 00001
   VCID: 6582623DAC334B6702-8030

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right (J389)       Labels:. 4F0-959-795.clb
   Part No SW: 4F0 959 795 P    HW: 4F0 959 795 P
   Component: TSG HR        H11 0362  
   Revision:             Serial number: 0000044604887 
   Coding: 010E06204061230004
   Shop #: WSC 31414 790 00001
   VCID: 46C085B1F1F5607FEB-8012

No fault code found.

End----------(Elapsed Time: 01:52, VBatt start/end: 14.2V/14.5V)-----------
 
Last edited:
   #2  

DrPeter

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Hello,

Thank you for posting your question and adding an Auto-Scan of the vehicle.

We have a Ross-Tech wiki page for the fault code 02645 - Valves for Level Control System..

This wiki page makes mention of this TSB 43-08-16 | TPI 2018765 .

In summery the TSB says to check the J403-Relay for Adaptive Air Suspension Compressor as it could be the source of the fault code.
According to the Official Factory Repair Manuals, the J403 is located on the 'Relay and fuse carrier instrument panel, Right-Hand Drive: In driver's footwell.'

I would check it out, making sure the contacts are not damaged, maybe worth just replacing the J403 relay.
Should be marked [643] or [373] - part number by VIN is [4H0-951-253-A] (verify this information with your local dealer parts department!)

Hope this helps and let us know what you find,

drpeter
 
   #3  

Mark Hudson

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Hello,

Thank you for posting your question and adding an Auto-Scan of the vehicle.

We have a Ross-Tech wiki page for the fault code 02645 - Valves for Level Control System..

This wiki page makes mention of this TSB 43-08-16 | TPI 2018765 .

In summery the TSB says to check the J403-Relay for Adaptive Air Suspension Compressor as it could be the source of the fault code.
According to the Official Factory Repair Manuals, the J403 is located on the 'Relay and fuse carrier instrument panel, Right-Hand Drive: In driver's footwell.'

I would check it out, making sure the contacts are not damaged, maybe worth just replacing the J403 relay.
Should be marked [643] or [373] - part number by VIN is [4H0-951-253-A] (verify this information with your local dealer parts department!)

Hope this helps and let us know what you find,

drpeter
Hi, Thanks for your response, i have replaced the relay with a new Hella relay which has made no difference to the fault. Please let me know if you have any further ideas...

Thanks Again
Mark
 
   #4  

Mark Hudson

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Sorry for the long delay but thought I should update the thread.

After a lot of head scratching we figured out what was causing this issue - the compressor.

Even though it had been reconditioned with a new piston ring/seal kit and had the dryer reconditioned with new desiccant and filters it turned out that the motor must have been weak or had a high resistance and was causing air pressure to not be built up quite as quickly as the ECU requested even though the live data seemed fine and the suspension seemed to pump up OK.

I hope this helps anyone in the future who is having a similar issue and cannot seem to get to the bottom of it.

Thanks to everyone for their contributions.

Mark
 
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