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Thread: 2014 Q7 A/C

  1. #1
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    2014 Q7 A/C

    After removing the engine to fix the oil leak at the rear timing cover, I re-installed the engine/trans assembly With only the steering position sensor issue at the time which I sorted thanks to the Ross Tech help, I am trying to get the A/C recharged but I can't get the compressor to cut in with bottle pressure in the system. I have tested fans, cleared the code for the compressor control valve (N280 I think?) because I had it disconnected but can't find what is stopping the compressor from loading up. I don't know if I have to play with adaptations because of the disconnection? I haven't adjusted any adaptations other than the steer angle sensor since refitting the engine.
    Can anyone see something that I've missed?
    Code:
    Tuesday,26,May,2020,20:27:00:15263
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
    VCDS Version: 20.4.1.0 (x64)
    Data version: 20200331 DS317.0
    www.Ross-Tech.com
    
    
    VIN: WAUZZZ4L8ED035825   License Plate: 
    
    
    Chassis Type: 4L-AU56 (4F0)
    Scan: 01 02 03 05 08 09 10 15 16 17 18 19 28 42 46 47 4F 52 55 56
              5F 62 69 6C 6D 6F 72
    
    VIN: WAUZZZ4L8ED035825   Mileage: 109640km-68127miles
    
    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: Malfunction 0010
    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
    28-HVAC, Rear -- Status: OK 0000
    42-Door Elect, Driver -- Status: Malfunction 0010
    46-Central Conv. -- Status: OK 0000
    47-Sound System -- 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
    69-Trailer -- 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  X41 0003  
       Revision: 53X41---    Serial number:               
       Coding: 2A2A4012A52701020000
       Shop #: WSC 31414 790 00001
       ASAM Dataset: EV_ECM30TDI0114L2910401B 001003
       ROD: EV_ECM30TDI0114L1910401H.rod
       VCID: 23451C742AEE679E36-8076
    
    No fault code found.
    Readiness: 0 0 0 0 1 
    
    -------------------------------------------------------------------------------
    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  002 2447  
       Serial number:               
       Coding: 001578
       Shop #: WSC 07763 002 1048576
       ASAM Dataset: EV_TCMAL991031 002112
       ROD: EV_TCMAL991031_002.rod
       VCID: 76E31520C9FCA23621-8022
    
    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: 2196577
       Shop #: WSC 60575 001 1048576
       VCID: 3467EF285700F026DF-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: 10603702127564
       Coding: 0000151
       Shop #: WSC 31414 790 00001
       VCID: 2541026CECDA99AE58-8070
    
       Subsystem 1 - Part No: 4F0 910 132 C
       Component: FBSAUDIC6 EZS   H04 0020
    
       Subsystem 2 - Part No: 4F0 910 335 B
       Component: FBSAUDIC6 KSG   H03 0020
    
    2 Faults Found:
    00190 - Driver's Door Handle Touch Sensor (G415) 
                007 - Short to Ground
                 Freeze Frame:
                        Fault Status: 01110111
                        Fault Priority: 3
                        Fault Frequency: 1
                        Reset counter: 73
                        Mileage: 108279 km
                        Time Indication: 0
                        Date: 2020.03.16
                        Time: 21:13:55
    
    00193 - Rear Right Door Handle Touch Sensor (G418) 
                007 - Short to Ground
                 Freeze Frame:
                        Fault Status: 01110111
                        Fault Priority: 3
                        Fault Frequency: 1
                        Reset counter: 73
                        Mileage: 108279 km
                        Time Indication: 0
                        Date: 2020.03.16
                        Time: 21:13:55
    
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC (J255)       Labels: None
       Part No SW: 4L0 910 043 D    HW: 4L0 820 043 AN
       Component: KLIMA 4 ZONEN H15 0070  
       Revision: 00---031    Serial number: 00000000423985
       Coding: 01029456
       Shop #: WSC 31414 790 00001
       VCID: 2541026C2CDA99AE58-8070
    
    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: 0023121
       Shop #: WSC 31414 790 00001
       VCID: 6FED20447EA693FEE2-803A
    
       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: 55961409700521
       Coding: 29031F
       Shop #: WSC 31414 790 00001
       ASAM Dataset: EV_EPHVA18AU7160000 001001
       ROD: EV_EPHVA18AU7160000.rod
       VCID: 3467EF289F00F026DF-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: 70 AIRBAG AUDI8RH45 0230  
       Revision: 06H45000    Serial number: 00399D6066R-  
       Coding: 0014128
       Shop #: WSC 31414 790 00001
       VCID: 2E53FD40B92CDAF6A9-807A
    
       Subsystem 1 - Serial number: 6332QSME743D4F46V
    
       Subsystem 2 - Serial number: 6342QSME773D0C4CY
    
       Subsystem 3 - Serial number: 6352QSME743D4E44U
    
       Subsystem 4 - Serial number: 6362QSME4D404946M
    
       Subsystem 5 - Serial number: 63734SME093D3F4AF
    
       Subsystem 6 - Serial number: 63834SME093D325E8
    
    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: 00H09000    Serial number: 90026140790135
       Coding: 0102142
       Shop #: WSC 31414 790 00001
       VCID: 285F0B589BC884C663-807C
    
       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 920 933 H    HW: 4L0 920 933 H
       Component: KOMBIINSTR.   H35 0332  
       Revision: 00000000    Serial number: X2M50GA4F     
       Coding: B356630400000008010704
       Shop #: WSC 31414 790 00001
       VCID: 326BE9306D14FE16CD-8066
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 18: Aux. Heat        Labels: 4L0-910-105.lbl
       Part No SW: 4L0 910 105     HW: 4L0 815 071 H
       Component: Heizgeraet      H10 0140  
       Revision: 0000000A    Serial number: 00000009024928
       Coding: 0000101
       Shop #: WSC 31414 790 00001
       VCID: 60CF5378B3783C866B-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: LB700037    Serial number: 3700L144050AB8
       Coding: 00CF07
       Shop #: WSC 31414 790 00001
       VCID: 3E73CD00A94C2A7639-806A
    
       Subsystem 1 - Part No SW: 8K0 915 181 D    HW: 8K0 915 181 D
       Component: J367-BDM  H07 0125 
       Serial number: 31078N18284121930888
    
       Subsystem 2 - Part No SW: 8K0 959 663     HW: 8K0 959 663 
       Component: J532_DCDCStab  H17 0042 
       Serial number: 14099000795021200181
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 28: HVAC, Rear        Labels: None
       Part No SW: 4L0 910 158     HW: 4L0 919 158 AD
       Component: KLIMABETAETIGUNGH06 0060  
       Revision: 00---011    Serial number: 00000030331375
       Coding: 0000006
       Shop #: WSC 31414 790 00001
       VCID: 68DF4B585B4844C6A3-803C
    
    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: 0000098720514 
       Coding: 011C52204041440004
       Shop #: WSC 31414 790 00001
       VCID: 489FABD8FB8864C683-801C
    
    2 Faults Found:
    02126 - Central Locking Button; Exterior Door Handle 
                008 - Implausible Signal
                 Freeze Frame:
                        Fault Status: 01101000
                        Fault Priority: 3
                        Fault Frequency: 2
                        Reset counter: 124
                        Mileage: 108279 km
                        Time Indication: 0
                        Date: 2020.03.16
                        Time: 21:15:02
    
    01705 - Selection Switch for Mirror-Adjust (E48) 
                008 - Implausible Signal
                 Freeze Frame:
                        Fault Status: 01101000
                        Fault Priority: 3
                        Fault Frequency: 61
                        Reset counter: 132
                        Mileage: 109385 km
                        Time Indication: 0
                        Date: 2020.04.17
                        Time: 17:49:31
    
    
    -------------------------------------------------------------------------------
    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: 01945611960000
       Coding: 3277197
       Shop #: WSC 31414 790 00001
       VCID: 387FDB184B681446F3-806C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 47: Sound System (J525)       Labels: None
       Part No SW: 4L0 035 223 J    HW: 4L0 035 223 G
       Component: BOSE G3 Q7    H04 0160  
       Revision: CH004001    Serial number: 00000000038977
       Coding: 030000
       Shop #: WSC 31414 790 00001
       VCID: 29590E5C40C2BDCE7C-807C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 4F: Centr. Electr. II        Labels: 4F0-910-280.lbl
       Part No SW: 4F0 910 280     HW: 4F0 907 280 
       Component: ILM Beifahrer   H16 0100  
       Revision:             Serial number: 00000000741415
       Coding: 0011001
       Shop #: WSC 31414 790 00001
       VCID: 5EB36D80890C0A7659-800A
    
    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: 0000098728995 
       Coding: 011C52204041440004
       Shop #: WSC 31414 790 00001
       VCID: 479DA8E4F6966BBE8A-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: 140414-0002-061
       Coding: 1147A71010000500
       Shop #: WSC 31414 790 00001
       ASAM Dataset: EV_HeadlRegulBasic 005001
       ROD: EV_HeadlRegulBasic.rod
       VCID: 428BB9F0D5B44E965D-8016
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio (R)       Labels: Redir Fail!
       Part No SW: 4G1 035 053 J    HW: 4G1 035 053 
       Component: Radio U Basic H41 0133  
       Revision: AB001007    Serial number: 227D60E7991279
       Coding: 040003010000000000
       Shop #: WSC 31414 790 00001
       VCID: 2643056051DC92B651-8072
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 5F: Information Electr. (J794)       Labels:. 4E0-035-6xx-5F.clb
       Part No SW: 4L2 035 764 G    HW: 4L2 035 764 G
       Component: H-BNT-RW      H48 0793  
       Revision: --------    Serial number: 222DS0E7516117
       Coding: 180A0106000483EF010023456F6320035C0000000000000000
       Shop #: WSC 60575 001 1048576
       VCID: 326BE9306D14FE16CD-8066
    
       Subsystem 1 - Part No: 8R0 060 884 BN
       Component: ROW 2014  0605 
    
       Subsystem 2 - Part No SW: 8R0 919 604 A    HW: 8R0 919 604 A
       Component: DU7 High  H42 0104 
       Serial number: A130DA0E3001143     
    
       Subsystem 3 - Part No SW: 4L0 919 614 C    HW: 4L0 919 614 C
       Component: E0380 Bedient  H01 0060 
       Serial number: 00000002177647      
    
       Subsystem 4 - Part No: 8R0 060 961 F
       Component: CD-Database  5571 
    
    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: 0000099877752 
       Coding: 010850204041230004
       Shop #: WSC 31414 790 00001
       VCID: 4683A5E0F19C72B671-8012
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 69: Trailer (J345)       Labels:. 4E0-907-383.clb
       Part No SW: 4E0 907 383 J    HW: 4E0 907 383 J
       Component: Anhaenger     H09 0100  
       Revision: 2A001001    Serial number: 00000193421681
       Coding: 0300000000000000
       Shop #: WSC 12345 123 12345
       VCID: 3169E63C6812C50EB4-8064
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 6C: Back-up Cam. (J928)       Labels:* None
       Part No SW: 4L0 907 428     HW: 7P6 907 441 D
       Component: TopView       H05 0293  
       Revision: 11001001    Serial number: 82330JF0142720
       Coding: 020C010001000100000102000000
       Shop #: WSC 31414 790 00001
       ASAM Dataset: EV_CamSysteCorneViewAUDI 004005
       ROD: EV_CamSysteCorneViewAUDI.rod
       VCID: 6ED33D40B1AC9AF6E9-803A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 6D: Trunk Elect.        Labels: None
       Part No SW: 4L0 910 945     HW: 4L0 827 851 F
       Component: ValeoHeckdeckel H58 0500  
       Revision: --H58001    Serial number: E5030000B     
       Shop #: WSC 98765 666 38354
       VCID: 6CD737484FB068E6C7-8038
    
       Subsystem 1 - Part No: 4L0 910 946 
       Component: ValeoHeckdeckel H58 0500
    
       Subsystem 2 - Serial number: 6ó
    
       Subsystem 3 - Serial number: RD12.04.14--H58001002F0398˙
    
       Subsystem 4 - Serial number: 2F0398˙
    
    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: 0096855861----
       Coding: 0000001
       Shop #: WSC 31414 790 00001
       VCID: 65C1426CAC5A59AE98-8030
    
    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: 0000099875827 
       Coding: 010850204041230004
       Shop #: WSC 31414 790 00001
       VCID: 4683A5E0F19C72B671-8012
    
    No fault code found.
    
    End-------------------------(Elapsed Time: 03:43)--------------------------

  2. #2
    Ross-Tech Employee Jef's Avatar
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    General info that may be helpful.

    No codes in HVAC, so lets see if you have a shut down code... engine at idle, should be in 08-08-002.

    Some HVAC system do have basic settings, but if everything is to factory design, it will relearn after letting the engine idle for 20 or so minutes in most cases.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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  4. #3
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    Jef, thanks for your reply, advice and information links.
    I can't believe how powerful this tool is, I've been working on electronic gear since Detroit and Cummins went that way and this thing is making me look like an idiot!
    I needed your direction to find any shut down codes, I have no labels at all when I'm in HVAC MVB, just data - sometimes. When I get to that location you directed me to I have 4 boxes of 0.0, so I'm guessing no shut down codes. There is no drop down box for a list to select from.
    When I check engine MVB, compressor torque shows 25Nm and requested 4.2Nm.
    I wasn't game to change any boxes in basic setting to have a look.
    This thing has run for 20 or more a number of times while I'm trying to diagnose and nothing has changed.
    My last check will be an incandescent bulb plugged in at the compressor - will a standard test light be suitable or is a bigger wattage globe needed?

    I appreciate your help.

    Geoff

  5. #4
    Ross-Tech Employee Jef's Avatar
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    If 08-08-002 is showing a value of 0.0 in the first field, that means the HVAC control module is wanting to run the compressor... pretty much "all systems are a go" type thing. Now having said that, if the compressor itself has an issue, then no AC. Pretty much like having a bad light bulb in the bathroom.... you can flip the switch on/off all day long, still going to be dark in there.

    Hook up your A/C gauges, what are the pressures when trying to run the system?
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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  7. #5
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    Thanks Jef,
    I have approx 70 pound high and low side, which is pretty close to what the electronics tell me as well.
    I reckon it's the compressor as you've said, a standard test light with an incandescent bulb to complete the last test at the plug on the compressor do or does it need a higher wattage globe?
    Thanks for your help.

    Geoff

  8. #6
    Ross-Tech Employee Jef's Avatar
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    From Peter's HVAC stick post:

    Typical N280-Refrigerant Regulating Valve resistance (on working vehicle) = 10-12 Ω
    I can't say I know what watt bulb that would be..... lets see.. Ohms law says say 13V and 11Ω would be a bit over 1A and around 15watt, so ya got a 15watt bulb I guess?
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

  9. #7
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    Jeff, thanks for your assistance and giving me a better understanding on the A/C system control operation.
    It all pointed to the compressor as you highlighted, I replaced that and recharged the system last night - and I get 6 degrees C at the vent and on a cool afternoon.
    VERY happy.
    Ross Tech support is invaluable.
    Much appreciated.

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