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Thread: Audi a3 DSG fault code 28775

  1. #1
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    Audi a3 DSG fault code 28775

    On a 2004 Audi A3 i have a persistent fault code 28775 “no communication with gear selector module” as diagnosed with Ross-tech Hex-V2 full version.
    Mechatronic unit has been professionally tested and given the all clear, Gear selector unit also no fault ; earth points and associated connections, relays and fuses checked ok
    How do i now proceed to the next logical step to determine the location of the fault/s in order to correct/restore communication with the said unit? Hope that somebody can help;
    first time on the forum so hope all works .

    Scan attached:

    Code:
    Chassis Type: 8P (1K0)
    Scan: 01 02 03 08 09 15 16 17 19 25 42 44 46 52 55 56 76 7D
    
    VIN: WAUZZZ8P75A030386   Mileage: 181710km-112909miles
    
    00-Steering Angle Sensor -- Status: OK 0000
    01-Engine -- Status: OK 0000
    02-Auto Trans -- Status: Malfunction 0010
    03-ABS Brakes -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. 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
    25-Immobilizer -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: Malfunction 0010
    46-Central Conv. -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    55-Headlight Range -- Status: OK 0000
    56-Radio -- Status: OK 0000
    76-Park Assist -- Status: OK 0000
    7D-Aux. Heat -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 03G-906-016-BKD.clb
       Part No SW: 03G 906 016 DT    HW: 028 101 189 2
       Component: R4 2,0L EDC G200AG  5878  
       Revision: 12345678    Serial number: AUX7Z0D6FNR069
       Coding: 0000078
       Shop #: WSC 00579 210 08335
       VCID: 78A9160A0EDA4D67494-802C
    
    No fault code found.
    Readiness: 0 0 0 0 1 
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 02E-927-770.clb
       Part No SW: 02E 300 041 N    HW: 02E 927 770 AD
       Component: GSG DSG         041 0813  
       Revision: 00004010    Serial number: 00000407020223
       Coding: 0000020
       Shop #: WSC 06435 000 00000
       VCID: 1D67279EC1B8C84F7A2-8048
    
    1 Fault Found:
    28775 - No Communication with Gear Selector Module 
                U0103 - 000 -  - Intermittent - MIL ON
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
       Part No: 1K0 907 379 K
       Component: ESP FRONT MK60      0103  
       Coding: 0023174
       Shop #: WSC 06435 000 00000
       VCID: 3A2DCC0270569F777F0-806E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
       Part No SW: 8P0 820 043 D    HW: 8P0 820 043 D
       Component: KlimavollautomatH12 0150  
       Revision: 078064      Serial number: 8P0820043D    
       Shop #: WSC 00000 000 00000
       VCID: 2D07F75EB11838CFEA2-8078
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels:. 8P0-907-279-23-H.lbl
       Part No SW: 8P0 907 279 C    HW: 8P0 907 279 C
       Component: Bordnetz-SG     H31 0202  
       Revision: 00H31000    Serial number: 00000000828414
       Coding: E48A5F16A214100000000000000000000000FA0F5C
       Shop #: WSC 00000 000 00000
       VCID: 3D27C71E6178A84F5A2-8068
    
       Subsystem 1 - Part No: 8P2 955 119 B  Labels: 1KX-955-119.CLB
       Component: Wischer AU350   H01 0130  
       Coding: 00062736
       Shop #: WSC 00000  
    
       Subsystem 2 - Part No: 4E0 910 557   Labels: 8K0-955-559.CLB
       Component: REGENLICHTSENSORH10 0040  
       Coding: 00150573
       Shop #: WSC 00000  
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8P0-959-655-84.lbl
       Part No SW: 8P0 959 655 D    HW: 8P0 959 655 D
       Component: Airbag 8.4ED    H00 0140  
       Coding: 0011602
       Shop #: WSC 06435 000 00000
       VCID: 43D3B1E6079CDEBF2C6-8016
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 8P0-953-549.lbl
       Part No SW: 8P0 953 549     HW: 8P0 953 549 
       Component: Lenksäulenmodul H11 0020  
       Coding: 0011122
       Shop #: WSC 06435 000 00000
       VCID: 7BA309063FEC667F246-802E
    
       Subsystem 1 - Part No: XXXXXXXXXXX 
       Component: Lenkradmodul    H03 0040
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8P0-920-xxx-17-MY7.lbl
       Part No SW: 8P0 920 980 P    HW: 8P0 920 980 P
       Component: KOMBIINSTR. VDO H71 0210  
       Revision: D02         Serial number: 2246DD02003189
       Coding: 0002408
       Shop #: WSC 57229 001 1048576
       VCID: 44D1B2FA0292D98715C-8010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway        Labels:. 1K0-907-530-V1.clb
       Part No SW: 1K0 907 530 D    HW: 1K0 907 951 
       Component: Gateway         H08 0100  
       Revision: 08          Serial number: 25001047100468
       Coding: 7F0F0F40070101
       Shop #: WSC 06435 000 00000
       VCID: 2809064A9EFA1DE7194-807C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
       Part No SW: 8P0 920 980 P    HW: 8P0 920 980 P
       Component: KOMBIINSTR. VDO H71 0210  
       Revision: D02         Serial number: AUX7Z0D6FNR069
       Shop #: WSC 00000 000 00000
       VCID: 44D1B2FA0292D98715C-8010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver        Labels: 8P0-959-801-MAX1.lbl
       Part No: 8P0 959 801 D
       Component: Tuersteuerger.  H10 0030  
       Coding: 0000120
       Shop #: WSC 06435 000 00000
       VCID: 3C21CA1A7A62A1476DC-8068
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 1Kx-909-144-G2V2.clb
       Part No: 1K2 909 144 G
       Component: EPS_ZFLS Kl.10      1301  
       Shop #: WSC 00000 000 00000
       VCID: 3039EE2AA62A5527C14-8064
    
    1 Fault Found:
    00778 - Steering Angle Sensor (G85) 
                000 -  - 
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels: 8P0-959-433.lbl
       Part No: 8P0 959 433 
       Component:    KSG          H02 0040  
       Coding: 008000186D288505489AC63000
       Shop #: WSC 06435 000 00000
       VCID: 79AF130E35D0546F36A-802C
    
       Subsystem 1 - Part No: 1K0 951 605 A
       Component: LIN BACKUP HORN H01 1201
    
       Subsystem 2 - Part No: 1K0 907 719 
       Component: Neigungssensor  003 0003
    
       Subsystem 3 - Part No: 8P0 951 177 
       Component: Innenraumueberw.H03 0010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass.        Labels: 8P0-959-802-MAX1.lbl
       Part No: 8P0 959 802 D
       Component: Tuersteuerger.  H10 0030  
       Coding: 0000120
       Shop #: WSC 06435 000 00000
       VCID: 3D27C71E6178A84F5A2-8068
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 55: Headlight Range        Labels: 8P0-907-357.lbl
       Part No: 8P0 907 357 A
       Component: Dynamische LWR  H01 0010  
       Revision: 00000000    Serial number:               
       Coding: 0000001
       Shop #: WSC 06435 000 00000
       VCID: 3829D60A4E5A8D67894-806C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8P0-035-1xx-56.lbl
       Part No SW: 8P0 035 186 C    HW: 8P0 035 186 C
       Component: concert II EU   H51 0100  
       Revision:      01S    Serial number: AUZ2Z3D1203632
       Coding: 0021201
       Shop #: WSC 06435 000 00000
       VCID: 323DE422A8266737B70-8066
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 76: Park Assist        Labels: 8P0-919-283.lbl
       Part No SW: 8P0 919 283     HW: 8P0 919 283 
       Component: Parkhilfe 4-Kan H06 0030  
       Coding: 0001003
       Shop #: WSC 06435 000 00000
       VCID: 78A9160A0EDA4D67494-802C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 7D: Aux. Heat        Labels: 1K0-963-235.lbl
       Part No SW: 1K0 963 235 E    HW: 1K0 963 235 E
       Component: PTC-Element         0404  
       Revision: 00800000    Serial number:               
       Shop #: WSC 00000 000 00000
       VCID: 2D07F75EB11838CFEA2-8078
    
    No fault code found.
    
    End----------(Elapsed Time: 01:10, VBatt start/end: 14.2V/14.2V)-----------
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    Last edited by Uwe; 01-12-2019 at 11:58 AM. Reason: CODE tags

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  3. #2
    Benevolent Dictator Uwe's Avatar
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    Interesting that the fault is flagged "Intermittent". That means the fault condition that set this code wasn't there (or could not be detected) at the time the scan was performed. That also makes pin-pointing the source of the fault condition a much bigger challenge....

    -Uwe-
    The engineering problems are likely insurmountable. It would be like proposing to land a rocket booster section on a barge floating in the middle of the ocean.

  4. #3
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    Quote Originally Posted by davidwhiting View Post
    On a 2004 Audi A3 i have a persistent fault code 28775 “no communication with gear selector module” as diagnosed with Ross-tech Hex-V2 full version.
    Mechatronic unit has been professionally tested and given the all clear, Gear selector unit also no fault ; earth points and associated connections, relays and fuses checked ok
    How do i now proceed to the next logical step to determine the location of the fault/s in order to correct/restore communication with the said unit? Hope that somebody can help;
    first time on the forum so hope all works .

    Scan attached:

    Code:
    Chassis Type: 8P (1K0)
    Scan: 01 02 03 08 09 15 16 17 19 25 42 44 46 52 55 56 76 7D
    
    VIN: WAUZZZ8P75A030386   Mileage: 181710km-112909miles
    
    00-Steering Angle Sensor -- Status: OK 0000
    01-Engine -- Status: OK 0000
    02-Auto Trans -- Status: Malfunction 0010
    03-ABS Brakes -- Status: OK 0000
    08-Auto HVAC -- Status: OK 0000
    09-Cent. 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
    25-Immobilizer -- Status: OK 0000
    42-Door Elect, Driver -- Status: OK 0000
    44-Steering Assist -- Status: Malfunction 0010
    46-Central Conv. -- Status: OK 0000
    52-Door Elect, Pass. -- Status: OK 0000
    55-Headlight Range -- Status: OK 0000
    56-Radio -- Status: OK 0000
    76-Park Assist -- Status: OK 0000
    7D-Aux. Heat -- Status: OK 0000
    -------------------------------------------------------------------------------
    Address 01: Engine        Labels: 03G-906-016-BKD.clb
       Part No SW: 03G 906 016 DT    HW: 028 101 189 2
       Component: R4 2,0L EDC G200AG  5878  
       Revision: 12345678    Serial number: AUX7Z0D6FNR069
       Coding: 0000078
       Shop #: WSC 00579 210 08335
       VCID: 78A9160A0EDA4D67494-802C
    
    No fault code found.
    Readiness: 0 0 0 0 1 
    
    -------------------------------------------------------------------------------
    Address 02: Auto Trans        Labels: 02E-927-770.clb
       Part No SW: 02E 300 041 N    HW: 02E 927 770 AD
       Component: GSG DSG         041 0813  
       Revision: 00004010    Serial number: 00000407020223
       Coding: 0000020
       Shop #: WSC 06435 000 00000
       VCID: 1D67279EC1B8C84F7A2-8048
    
    1 Fault Found:
    28775 - No Communication with Gear Selector Module 
                U0103 - 000 -  - Intermittent - MIL ON
    
    -------------------------------------------------------------------------------
    Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
       Part No: 1K0 907 379 K
       Component: ESP FRONT MK60      0103  
       Coding: 0023174
       Shop #: WSC 06435 000 00000
       VCID: 3A2DCC0270569F777F0-806E
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
       Part No SW: 8P0 820 043 D    HW: 8P0 820 043 D
       Component: KlimavollautomatH12 0150  
       Revision: 078064      Serial number: 8P0820043D    
       Shop #: WSC 00000 000 00000
       VCID: 2D07F75EB11838CFEA2-8078
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 09: Cent. Elect.        Labels:. 8P0-907-279-23-H.lbl
       Part No SW: 8P0 907 279 C    HW: 8P0 907 279 C
       Component: Bordnetz-SG     H31 0202  
       Revision: 00H31000    Serial number: 00000000828414
       Coding: E48A5F16A214100000000000000000000000FA0F5C
       Shop #: WSC 00000 000 00000
       VCID: 3D27C71E6178A84F5A2-8068
    
       Subsystem 1 - Part No: 8P2 955 119 B  Labels: 1KX-955-119.CLB
       Component: Wischer AU350   H01 0130  
       Coding: 00062736
       Shop #: WSC 00000  
    
       Subsystem 2 - Part No: 4E0 910 557   Labels: 8K0-955-559.CLB
       Component: REGENLICHTSENSORH10 0040  
       Coding: 00150573
       Shop #: WSC 00000  
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 15: Airbags        Labels: 8P0-959-655-84.lbl
       Part No SW: 8P0 959 655 D    HW: 8P0 959 655 D
       Component: Airbag 8.4ED    H00 0140  
       Coding: 0011602
       Shop #: WSC 06435 000 00000
       VCID: 43D3B1E6079CDEBF2C6-8016
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 16: Steering wheel        Labels: 8P0-953-549.lbl
       Part No SW: 8P0 953 549     HW: 8P0 953 549 
       Component: Lenksäulenmodul H11 0020  
       Coding: 0011122
       Shop #: WSC 06435 000 00000
       VCID: 7BA309063FEC667F246-802E
    
       Subsystem 1 - Part No: XXXXXXXXXXX 
       Component: Lenkradmodul    H03 0040
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 17: Instruments        Labels: 8P0-920-xxx-17-MY7.lbl
       Part No SW: 8P0 920 980 P    HW: 8P0 920 980 P
       Component: KOMBIINSTR. VDO H71 0210  
       Revision: D02         Serial number: 2246DD02003189
       Coding: 0002408
       Shop #: WSC 57229 001 1048576
       VCID: 44D1B2FA0292D98715C-8010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 19: CAN Gateway        Labels:. 1K0-907-530-V1.clb
       Part No SW: 1K0 907 530 D    HW: 1K0 907 951 
       Component: Gateway         H08 0100  
       Revision: 08          Serial number: 25001047100468
       Coding: 7F0F0F40070101
       Shop #: WSC 06435 000 00000
       VCID: 2809064A9EFA1DE7194-807C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
       Part No SW: 8P0 920 980 P    HW: 8P0 920 980 P
       Component: KOMBIINSTR. VDO H71 0210  
       Revision: D02         Serial number: AUX7Z0D6FNR069
       Shop #: WSC 00000 000 00000
       VCID: 44D1B2FA0292D98715C-8010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 42: Door Elect, Driver        Labels: 8P0-959-801-MAX1.lbl
       Part No: 8P0 959 801 D
       Component: Tuersteuerger.  H10 0030  
       Coding: 0000120
       Shop #: WSC 06435 000 00000
       VCID: 3C21CA1A7A62A1476DC-8068
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 44: Steering Assist        Labels: 1Kx-909-144-G2V2.clb
       Part No: 1K2 909 144 G
       Component: EPS_ZFLS Kl.10      1301  
       Shop #: WSC 00000 000 00000
       VCID: 3039EE2AA62A5527C14-8064
    
    1 Fault Found:
    00778 - Steering Angle Sensor (G85) 
                000 -  - 
    
    -------------------------------------------------------------------------------
    Address 46: Central Conv.        Labels: 8P0-959-433.lbl
       Part No: 8P0 959 433 
       Component:    KSG          H02 0040  
       Coding: 008000186D288505489AC63000
       Shop #: WSC 06435 000 00000
       VCID: 79AF130E35D0546F36A-802C
    
       Subsystem 1 - Part No: 1K0 951 605 A
       Component: LIN BACKUP HORN H01 1201
    
       Subsystem 2 - Part No: 1K0 907 719 
       Component: Neigungssensor  003 0003
    
       Subsystem 3 - Part No: 8P0 951 177 
       Component: Innenraumueberw.H03 0010
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 52: Door Elect, Pass.        Labels: 8P0-959-802-MAX1.lbl
       Part No: 8P0 959 802 D
       Component: Tuersteuerger.  H10 0030  
       Coding: 0000120
       Shop #: WSC 06435 000 00000
       VCID: 3D27C71E6178A84F5A2-8068
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 55: Headlight Range        Labels: 8P0-907-357.lbl
       Part No: 8P0 907 357 A
       Component: Dynamische LWR  H01 0010  
       Revision: 00000000    Serial number:               
       Coding: 0000001
       Shop #: WSC 06435 000 00000
       VCID: 3829D60A4E5A8D67894-806C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 56: Radio        Labels: 8P0-035-1xx-56.lbl
       Part No SW: 8P0 035 186 C    HW: 8P0 035 186 C
       Component: concert II EU   H51 0100  
       Revision:      01S    Serial number: AUZ2Z3D1203632
       Coding: 0021201
       Shop #: WSC 06435 000 00000
       VCID: 323DE422A8266737B70-8066
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 76: Park Assist        Labels: 8P0-919-283.lbl
       Part No SW: 8P0 919 283     HW: 8P0 919 283 
       Component: Parkhilfe 4-Kan H06 0030  
       Coding: 0001003
       Shop #: WSC 06435 000 00000
       VCID: 78A9160A0EDA4D67494-802C
    
    No fault code found.
    
    -------------------------------------------------------------------------------
    Address 7D: Aux. Heat        Labels: 1K0-963-235.lbl
       Part No SW: 1K0 963 235 E    HW: 1K0 963 235 E
       Component: PTC-Element         0404  
       Revision: 00800000    Serial number:               
       Shop #: WSC 00000 000 00000
       VCID: 2D07F75EB11838CFEA2-8078
    
    No fault code found.
    
    End----------(Elapsed Time: 01:10, VBatt start/end: 14.2V/14.2V)-----------
    
    --------------------------------------------------------------------------------
    --------------------------------------------------------------------------------
    I think it would be wise to test with a good known selector module.....I battled one for the last two days .....would not even release key from ignition,while everything seemed fine,in the end a used one from a junkyard saved my skin
    Last edited by Fredrick Awuor; 01-12-2019 at 02:05 PM. Reason: Spelling

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  6. #4
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    Frederic, not real familiar with auto issues but is this module internal thus making impossible to scope during faults?

    LARIMORE

  7. #5
    NostraJackAss Jack@European_Parts's Avatar
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    History shows the unit fails often at shifter but some cases a bad wire or damage from critters or rodents can happen too causing FOD.
    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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