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Thread: 2007 AUDI A4 2.0T strange Aircon issue

  1. #1
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    2007 AUDI A4 2.0T strange Aircon issue

    Folks,

    I havent seen anything like this before. Car AC blows warm air. Freon level good. In AUTO mode when temp setting is on "Lo" the interior air blower goes to maximum speed but no air comes out of the vents. I hear the air sound rushing inside/seem recirculating in dashboard until I press the ECON button then air suddenly rush out of the vents but no cooling. In ECON mode, I see on VCDS that current supply to N280 cuts off. In AUTO mode, current is supplied to N280 regulating valve about 0.635A.
    I have done the air flaps basic initialization settings two times but nothing changed. What could cause the air not flowing through the vents when in AUTO Mode? What does the shut off stages set in MVB 2 mean?? Help appreciated!

    Code:
    Sunday,04,June,2017,18:36:48:46890
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 17.1.3.0 (x64)
    Data version: 20170320 DS267.7
    www.Ross-Tech.com
    
    
    VIN:    License Plate: QUERT
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC       Labels: 8E0-820-043.lbl
    Control Module Part Number: 8E0 820 043 BM
      Component and/or Version:   A4 Klimaautomat   2833
               Software Coding: 00000
                Work Shop Code: WSC 00000  
                          VCID: 6DDA00AD2726D42932-5120
    1 Fault Found:
    
    00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143) 
                09-00 - Adaptation Limit Surpassed
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Address 08: DTCs cleared
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Address 08: DTCs cleared
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Address 08: DTCs cleared
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Address 08: DTCs cleared
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    Code:
    Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
    Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
              67 69 75 76 77
     
    VIN: WAUDF78E37A055729   Mileage: 177990km-110597miles
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 06F-907-115-AXX.clb
       Part No SW: 8E0 910 115 P    HW: 8E0 907 115 D
       Component: 2.0l R4/4V TFSI     0020  
       Revision: 5EH13---    Serial number:               
       Coding: 0104010A190F0120
       Shop #: WSC 01126 444 65050
       VCID: 2E58C7A1B9A06F314B-807A
    
    No fault code found.
    Readiness: 0000 0000
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 09L-927-760.lbl
       Part No SW: 8E1 910 156 K    HW: 09L 927 156 B
       Component: AG6 09L 2.0TFSI USA 0030  
       Revision: --H01---    Serial number:        4212985
       Coding: 0000002
       Shop #: WSC 06335 000 00000
       VCID: 2F66DAA5BEAA663940-807A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-910-517.clb
       Part No SW: 8E0 910 517 J    HW: 8E0 614 517 BH
       Component: ESP8 quattro    H06 0140  
       Revision: 00000000    Serial number: 00000000000000
       Coding: 0004528
       Shop #: WSC 06335 000 00000
       VCID: 2E58C7A1B9A06F314B-807A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
       Part No: 8E0 820 043 BM
       Component:   A4 Klimaautomat   2833  
       Coding: 00000
       Shop #: WSC 00000  
       VCID: 6DDA00AD2726D42932-5120
    
    1 Fault Found:
    00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143) 
                09-00 - Adaptation Limit Surpassed
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels: 8E0-907-279-8EC.lbl
       Part No: 8E0 907 279 N
       Component: int. Lastmodul  USA 0907  
       Coding: 01023
       Shop #: WSC 65536  
       VCID: 3D7AF0ED37C684A9C2-4ACE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
       Part No SW: 8E0 035 593 F    HW: 8E0 035 593 F
       Component: SDAR SIRIUS         0120  
       Serial number: AUZ4Z7F1031323
       Shop #: WSC 00000 000 00000
       VCID: 2C5CCDA98CBC1D2165-5102
    
    1 Fault Found:
    02635 - Tuner Not Enabled/Activated 
                000 -  - 
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8E0-959-655-94.lbl
       Part No SW: 8E0 959 655 H    HW: 8E0 959 655 H
       Component:    Airbag 9.41  H12 3840  
       Revision: 91H12384    Serial number: 0036N0G041R.  
       Coding: 0032607
       Shop #: WSC 06335 000 00000
       VCID: 3C7CFDE97FDC8DA1F5-8068
    
       Subsystem 1 - Part No: 8E0 910 339 B
       Component: BF-Gewichtsens. 002 0070
    
       Subsystem 2 - Serial number: 3BK6A         
    
       Subsystem 3 - Serial number: 0001.01.000000200000000000˙†63
    
       Subsystem 4 - Serial number: 000000˙†6332DRB40399461ET˙†63
    
       Subsystem 5 - Serial number: 9461ET˙†6342DRB4037ACD0B/˙†63
    
       Subsystem 6 - Serial number: ACD0B/˙†6352ARB40163C593L˙†63
    
       Subsystem 7 - Serial number: 3C593L˙†6362ARB401702F49L˙†63
    
       Subsystem 8 - Serial number: 02F49L˙†63729RB401733A25E˙†63
    
       Subsystem 9 - Serial number: 33A25E˙†63829RB401733A04C˙
    
       Subsystem 10 - Serial number: 33A04C˙
    
    3 Faults Found:
    01212 - Belt Tensioner Igniter; Rear Passenger Side (N197) 
                001 - Upper Limit Exceeded - Intermittent
                 Freeze Frame:
                        Fault Status: 00100001
                        Fault Priority: 2
                        Fault Frequency: 2
                        Reset counter: 39
                        Time Indication: 0
    
    00591 - Seat Belt Switch; Driver (E24) 
                014 - Defective - Intermittent
                 Freeze Frame:
                        Fault Status: 00100001
                        Fault Priority: 2
                        Fault Frequency: 2
                        Reset counter: 39
                        Time Indication: 0
    
    00532 - Supply Voltage B+ 
                002 - Lower Limit Exceeded - Intermittent
                 Freeze Frame:
                        Fault Status: 00100010
                        Fault Priority: 2
                        Fault Frequency: 6
                        Reset counter: 39
                        Time Indication: 0
    
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 8E0-953-549.lbl
       Part No: 8E0 953 549 Q
       Component: Lenksáulenmodul     0701  
       Coding: 02041
       Shop #: WSC 06335  
       VCID: 41828C1D4B3EE049A6-4ACE
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8E0-920-9xx-8EC.lbl
       Part No SW: 8E0 920 951 G    HW: 8E0 920 951 G
       Component: KOMBI+WFS 4     H14 0110  
       Revision: 0110        Serial number: 00000000000000
       Coding: 0023261
       Shop #: WSC 01126 444 59246
       VCID: 2E58C7A1BAA06F314B-5102
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 8E0-920-9xx-8EC.lbl
       Part No SW: 8E0 920 951 G    HW: 8E0 920 951 G
       Component: KOMBI+WFS 4     H14 0110  
       Revision: 0110        Serial number: 00000000000000
       Coding: 0023261
       Shop #: WSC 01126 444 59246
       VCID: 2E58C7A1BAA06F314B-5102
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels: 8E0-959-433-MAX.clb
       Part No: 8E0 959 433 CG
       Component: Komfortgerát T7B    4135  
       Coding: 11820
       Shop #: WSC 06335  
       VCID: 78F421F958646181D1-4AE6
    
       Subsystem 1 - Part No: 8E1959801G
       Component: Tőrsteuer.FS BRM 0706  
    
       Subsystem 2 - Part No: 8E1959802G
       Component: Tőrsteuer.BF BRM 0706  
    
       Subsystem 3 - Part No: 8E0959801E
       Component: Tőrsteuer.HL BRM 0606  
    
       Subsystem 4 - Part No: 8E0959802E
       Component: Tőrsteuer.HR BRM 0606  
    
    3 Faults Found:
    00962 - Alarm via. Tilt Sensor 
                35-00 -  - 
    01374 - Alarm triggered by Terminal 15 
                35-00 -  - 
    01572 - Alarm triggered by Door Contact Switch; Passenger Side 
                35-00 -  - 
    
    -------------------------------------------------------------------------------
    Address 55: Headlight Range        Labels: 4F0-910-357.lbl
       Part No SW: 4F0 910 357 F    HW: 4F0 907 357 F
       Component: AFS 1           H01 0020  
       Revision: 00000001    Serial number:               
       Coding: 0000019
       Shop #: WSC 06335 000 00000
       VCID: 295234BD804E08099E-807C
    
       Subsystem 1 - Part No: 8E0 941 329 A
       Component: AFS-Modul links H03 0010
    
       Subsystem 2 - Part No: 8E0 941 329 A
       Component: AFS-Modul rechtsH03 0010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8J0-035-1xx-56.clb
       Part No SW: 8E0 035 195 AC    HW: 8E0 035 195 AC
       Component: R Symphony2+    H02 0070  
       Revision: 00H02000    Serial number: AUZ1Z4F2829251
       Coding: 0250102
       Shop #: WSC 06335 000 00000
       VCID: 68D471B958C4F10141-5102
    
    No fault code found.
    
    End-------------------------(Elapsed Time: 06:32)--------------------------
    Code:
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    18:54:24 Group 001
      0.000 A  A/C Valve (N280) Current
      0.0 %  A/C Valve (N280) Duty Cycle
      26.0 %  High-Pressure Signal (G65)
      7.0 bar  Refrigerant Circuit Pressure
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    18:54:27 Group 001
      0.000 A  A/C Valve (N280) Current
      0.0 %  A/C Valve (N280) Duty Cycle
      26.0 %  High-Pressure Signal (G65)
      7.0 bar  Refrigerant Circuit Pressure
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    18:54:32 Group 002: Compressor Shut-Off Criteria
      6.0  Current Shut-Off Criteria
      1.0  Last Shut-Off Criteria
      12.0  Second to Last Shut-Off Criteria
      1.0  Third to Last Shut-Off Criteria
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    18:54:39 Group 003: Left Temperature Flap Control Motor (V158)
      22.0  Current Value 
      18.0  Specified Value 
      21.0  Minimum Position (Cooling)
      223.0  Maximum Position (Heating)
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Address 08,8E0 820 043 BM,channel 0,adapted from,---,to,000
    Last edited by Uwe; 06-04-2017 at 09:38 PM. Reason: CODE tags

  2. #2
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    I'm just wondering if anybody has input on this of some form. Even when I push the center air vents button, still no air comes out from vents..air seem recirculating in dashboard/AC housing. Econ button when pressed cuts off supply to N280 valve which I think it is normal as seen in the diagnosis.current to compressor N280 is restored when econ is deactivated. Can this fault 00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143)
    09-00 - Adaptation Limit Surpassed prevent the air flow through the vents?
    I truly need some help in this complex matter..

  3. #3
    Ross-Tech Employee Jef's Avatar
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    1 = Compressor OFF: Refrigerant Pressure too high (> 32 bar)
    12 = Compressor OFF: Shut-Off requested by Engine Control
    http://forums.ross-tech.com/showthre...he-HVAC-Season

    So my first question, are we 100% sure the correct amount of charge is in the system? No codes in the engine, so not sure why it was requesting a shut down.
    Jef
    Ross Tech Support Team, Alpha Squad
    Auto-Scan, learn it, love it, live it... then check the fuses.

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  5. #4
    Verified VCDS User Zenerdiode's Avatar
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    Carry out an Output Test to ensure the actuators are driving the flaps. It is not unheard of for the actuator arms to snap, therefore not driving the flaps but still work their feedback potentiometer and therefore not trigger any codes.

    A Code 1 shut-off may arise if the condenser is blocked with flies, leaves and othe debris; or if the radiator fans are blocked.

  6. #5
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    The shut down request was a result of ECON button activated at the time of autoscan. Today I recharged freon (level was low) and turned on AC with auto button. I could tell the AC cools. Low side pipe feels cold and "sweaty'' but no air flows from the AC vents in dashboard, though the blower motors works. I can feel the air recirculating inside the dashboard/AC housing but the cold air doesnt flow out of any of the vents! But soon as I activate/press the ECON button, this time air flows through the vents .(of course ECON button turns off AC cooling). Very puzzling. What could cause the AC cooled air not to flow out of air vents? On previous scan the fault code 00735 and 00716 - Air recirculation Flap Positioning Motor (V113)
    41-00 - Blocked or No Voltage was recorded. Could these possibly block air flow through the vents when AC in Auto mode?

    Code:
    Friday,09,June,2017,12:33:38:46890
    VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
    VCDS Version: 17.1.3.0 (x64)
    Data version: 20170320 DS267.7
    www.Ross-Tech.com
    
    
    VIN: WAUDF78E37A055729   License Plate: QUERTIIN1
    
    
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
    Chassis Type: 8E (8E - Audi A4/S4/RS4 B6/B7 (2001 > 2008))
    Scan: 01 02 03 08 09 0F 11 15 16 17 18 25 36 37 45 46 55 56 57 65
              67 69 75 76 77
     
    VIN: WAUDF78E37A055729   
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 06F-907-115-AXX.clb
       Part No SW: 8E0 910 115 P    HW: 8E0 907 115 D
       Component: 2.0l R4/4V TFSI     0020  
       Revision: 5EH13---    Serial number:               
       Coding: 0104010A190F0120
       Shop #: WSC 01126 444 65050
       VCID: 2E58C7A1B9A06F314B-807A
    
    1 Fault Found:
    005634 - Power Supply Terminal 30 
                   P1602 - 002 - Voltage too Low - Intermittent
                 Freeze Frame:
                        Fault Status: 00100010
                        Fault Priority: 0
                        Fault Frequency: 1
                        Reset counter: 255
                        Mileage: 0 km
                        Time Indication: 0
    
                 Freeze Frame:
                        RPM: 0 /min
                        Load: 0.0 %
                        Speed: 0.0 km/h
                        Temperature: -40.0°C
                        Temperature: -40.0°C
                        Absolute Pres.: 0.0 mbar
                        Voltage: 0.000 V
    
    Readiness: 0000 0000
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 09L-927-760.lbl
       Part No SW: 8E1 910 156 K    HW: 09L 927 156 B
       Component: AG6 09L 2.0TFSI USA 0030  
       Revision: --H01---    Serial number:        4212985
       Coding: 0000002
       Shop #: WSC 06335 000 00000
       VCID: 2F66DAA5BEAA663940-807A
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 8E0-910-517.clb
       Part No SW: 8E0 910 517 J    HW: 8E0 614 517 BH
       Component: ESP8 quattro    H06 0140  
       Revision: 00000000    Serial number: 00000000000000
       Coding: 0004528
       Shop #: WSC 06335 000 00000
       VCID: 2E58C7A1B9A06F314B-807A
    
    1 Fault Found:
    01826 - Sensor for Steering Angle (G85); Supply Voltage Terminal 30 
                000 -  -  - Intermittent
                 Freeze Frame:
                        Fault Status: 00100000
                        Fault Priority: 3
                        Fault Frequency: 5
                        Reset counter: 17
                        Time Indication: 0
    
                 Freeze Frame:
                        Hex Value: 0x0000
                        Hex Value: 0x4222
                        Hex Value: 0x0024
                        Hex Value: 0x0196
                        Hex Value: 0x0001
    
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8E0-820-043.lbl
       Part No: 8E0 820 043 BM
       Component:   A4 Klimaautomat   2833  
       Coding: 00000
       Shop #: WSC 00000  
       VCID: 6DDA00AD2726D42932-5120
    
    1 Fault Found:
    00735 - Potentiometer in Positioning Motor for Air recirculation Flap (G143) 
                09-00 - Adaptation Limit Surpassed
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels: 8E0-907-279-8EC.lbl
       Part No: 8E0 907 279 N
       Component: int. Lastmodul  USA 0907  
       Coding: 01023
       Shop #: WSC 65536  
       VCID: 3D7AF0ED37C684A9C2-4AE6
    
    No fault code found.
    
    
    --------------------------------------------------------------------------------
    Code:
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    12:34:16 Group 001
      0.644 A  A/C Valve (N280) Current
      64.0 %  A/C Valve (N280) Duty Cycle
      44.0 %  High-Pressure Signal (G65)
      14.0 bar  Refrigerant Circuit Pressure
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    12:34:24 Group 002: Compressor Shut-Off Criteria
      0.0  Current Shut-Off Criteria
      1.0  Last Shut-Off Criteria
      12.0  Second to Last Shut-Off Criteria
      1.0  Third to Last Shut-Off Criteria
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    12:34:28 Group 003: Left Temperature Flap Control Motor (V158)
      22.0  Current Value 
      18.0  Specified Value 
      21.0  Minimum Position (Cooling)
      223.0  Maximum Position (Heating)
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    12:34:32 Group 004: Right Temperature Flap Control Motor (V159)
      18.0  Current Value 
      15.0  Specified Value 
      18.0  Minimum Position (Cooling)
      229.0  Maximum Position (Heating)
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    
    
                    Address 08: Auto HVAC  (8E0 820 043 BM)
    
    12:34:37 Group 005: Defroster Flap Control Motor (V107)
      21.0  Current Value 
      18.0  Specified Value 
      21.0  Minimum Position (Lower Stop)
      228.0  Maximum Position (Upper Stop)
    Last edited by Uwe; 06-10-2017 at 09:25 AM. Reason: CODE tags

  7. #6
    Verified VCDS User Zenerdiode's Avatar
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    Please try the Output Tests as I suggested above and report back.

    Whilst running on each motor, VCDS shows the specified (where the controller wants the flaps) and actual (where the feedback pots prove the position of the flaps) values of each of the control flaps.

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  9. #7
    NostraJackAss Jack@European_Parts's Avatar
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    Incorrect servo motors plugged in backward from recent work possibly.................

    What does recent service history state?

    JPPSG
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

  10. #8
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    There has not been any recent service on Ac system apart from cabin filter exhaust pipe replacement.

  11. #9
    NostraJackAss Jack@European_Parts's Avatar
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    Nevertheless check that servo motors are properly plugged in in their correct locations for each component as per the WD.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
    Certified Master Trained NY/BAR/BAD 7076062/ASE/SAE/NASTF Legal Factory Authorized/Licensed GeKo/FaZit # 403738
    Specializing in Custom Services IE: "welding-fabrication" / EPA-SMOG Update or Pass-Thru-Programming / Data Transfer / Immobilizers & OEM Quality Parts
    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
    Getting you CONTROL again of your property - TAKE IT! In Conjunction with.........

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  13. #10
    Verified VCDS User
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    I tried the output tests today. VCDS screen shows the regular test screen with "Start/Nest" but there was no way to select sequential mode.So I only continued clicking 'start/next' until the program run through all tests of actuators. I could hear actuators move during the test. But this is the new thing I observed: In the AUTO mode, no air comes out of dash vents at all. Soon as I tried to force open those two closed flaps under the cabin filter, suddenly I have cooled air flow through all dash vents.When I leave let go of flaps, air flow stops immediately unless I push ECON button, which wont give me any cooled air though air will flow through vents.
    Now what could cause these two flaps under cabin filter to close that tight in AC AUTO mode?
    Is there a way I could send pictures to support these new observations?? To send pics, vcds says attach pic from URL but not sure how to create this link. All pics are loaded on my desktop.

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