Audi A3 2012 TDI (8P) No crank

   #1  

Zoblod

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VCDS Serial number
C?ID=441453
I have the code posted at the bottom. But this car was in an accident almost two years ago (front end damage only things replaced were the radiator fan and front bumper and hood) but was fixed up and I used it since as my daily driver with no problems except not having fixed the passenger airbag and not resetting the airbag module which I was saving to fix for later, and ac recently went out lol. But one day I took a turn in a road and stabilization system kicked in and TMPS and then the car felt like it was stuck in neutral so I put it in park and turn it off and tried to turn it back on and I got no crank. My code reader said U0101 and I looked up the code and many of the signs were pointing towards TCM so I decided to get a real scan tool and here we are. A friend(he works on Audi cars) and I think that with a degree of certainty it could be the TCM and this is my first time actually going into the engine bay to do something real so I need all the help I can get and here we are. Has anyone encountered a problem like this or understands what might be happening?

Code:
Tuesday,20,April,2021,21:47:26:42433
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 21.3.0.0 (x64)  HEX-V2 CB: 0.4543.4
Data version: 20210226 DS325.0
www.Ross-Tech.com


VIN: WAUBJAFMXCA096785   License Plate:
Mileage: 231070km-143580mi   Repair Order:



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


Chassis Type: FM-AU35 (7N0)
Scan: 01 02 03 08 09 0F 15 16 17 19 25 42 44 46 47 4C 52 56 62 72
          77

VIN: WAUBJAFMXCA096785   Mileage: 231070km-143580miles

01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: Cannot be reached 1100
03-ABS Brakes -- Status: Malfunction 0010
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: Malfunction 0010
0F-Digital Radio -- Status: Malfunction 0010
15-Airbags -- Status: Malfunction 0010
16-Steering wheel -- Status: Malfunction 0010
17-Instruments -- Status: Malfunction 0010
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: Malfunction 0010
46-Central Conv. -- Status: OK 0000
47-Sound System -- Status: OK 0000
4C-Tire Pressure II -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
56-Radio -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
77-Telephone -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (CBE)       Labels: 03L-906-022-CBE.clb
   Part No SW: 03L 997 030 A    HW: 03L 906 019 EJ
   Component: R4 2.0l TDI G000AG  9983 
   Revision: 12H14---    Serial number: AUX7Z0KNFNS080
   Coding: 0050078
   Shop #: WSC 03356 003 1048576
   VCID: 2C010E560A016B7B03B-8078

1 Fault Found:
049409 - No Communication with Transmission Control Module
               U0101 - 000 -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.19
                    Time: 04:31:35

             Freeze Frame:
                    RPM: 0 /min
                    Speed: 0.0 km/h
                    Temperature: 11.7∞C
                    Voltage: 11.32 V
                    Bin. Bits: 00000000
                    Torque: 219.0 Nm
                    Temperature: 21.6∞C

Readiness: 0 0 0 1 1

-------------------------------------------------------------------------------
Address 02: Auto Trans
Cannot be reached

-------------------------------------------------------------------------------
Address 03: ABS Brakes (J104)       Labels:. 1K0-907-379-60EC1F.clb
   Part No SW: 1K0 907 379 BJ    HW: 1K0 907 379 BJ
   Component: ESP MK60EC1   H31 0121 
   Revision: 00H31001   
   Coding: 1150400F492B0000881202EC921E0042BF0C00
   Shop #: WSC 06314 000 00000
   VCID: 7BA3FD0AB3EF3CC3DA1-802E

2 Faults Found:
01325 - Control Module for Tire Pressure Monitoring (J502)
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 98
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.01
                    Time: 20:47:00

             Freeze Frame:
                    Count: 2
                    Count: 32780
                    Count: 4608
                    Count: 16390
                    Count: 50944
                    Count: 4097
                    Count: 254
                    Count: 0

01315 - Transmission Control Module
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 98
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.01
                    Time: 20:46:50

             Freeze Frame:
                    Count: 0
                    Count: 32768
                    Count: 4608
                    Count: 8195
                    Count: 50432
                    Count: 64234
                    Count: 60924
                    Count: 0


-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 8P0-820-043.lbl
   Part No SW: 8P0 820 043 BM    HW: 8P0 820 043 BM
   Component: KlimavollautomatH09 0180 
   Revision: 000123      Serial number: 8P0820043BM   
   Shop #: WSC 00000 000 00000
   VCID: 78A9E2068ED917DBB73-802C

2 Faults Found:
01232 - A/C Compressor Regulator Valve (N280)
            010 - Open or Short to Plus - Intermittent
             Freeze Frame:
                    Fault Status: 00101010
                    Fault Priority: 2
                    Fault Frequency: 63
                    Reset counter: 137
                    Mileage: 215691 km
                    Time Indication: 0
                    Date: 2020.11.13
                    Time: 18:55:01

             Freeze Frame:
                    Load: 50.0 %
                    Current: 0.000 A

01206 - Signal for Duration of Ignition Off Time
            008 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01101000
                    Fault Priority: 3
                    Fault Frequency: 1
                    Reset counter: 98
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.19
                    Time: 04:29:55

             Freeze Frame:


-------------------------------------------------------------------------------
Address 09: Cent. Elect. (J519)       Labels:. 8P0-907-063.clb
   Part No SW: 8P0 907 063 Q    HW: 8P0 907 063 Q
   Component: BCM PQ35  M   110 0719 
   Revision: AJ110667   
   Coding: 6E000A2FA81336E4287241E0000085E5463A60AA104DC128E40000800040
   Shop #: WSC 03356 003 1048576
   VCID: 42DD40EE94858D0BD97-8016

   Subsystem 1 - Part No SW: 8P1 955 119 F    HW: 8P1 955 119 F  Labels: 1KX-955-119.CLB
   Component: Wischer AU350  H11 0050
   Coding: 00DD13

   Subsystem 2 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HO  H05 1501

10 Faults Found:
01315 - Transmission Control Module
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 6
                    Fault Frequency: 3
                    Reset counter: 98
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.01
                    Time: 20:46:51

             Freeze Frame:
                        Term 15 On
                    Voltage: 14.15 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF

03189 - Bulb for Side Marker Light; Front Right
            010 - Open or Short to Plus - Intermittent
             Freeze Frame:
                    Fault Status: 00101010
                    Fault Priority: 1
                    Fault Frequency: 170
                    Reset counter: 138
                    Mileage: 225333 km
                    Time Indication: 0
                    Date: 2021.02.08
                    Time: 15:14:15

             Freeze Frame:
                        Term 15 On
                    Voltage: 14.30 V
                        ON
                        ON
                        Term 50 Off
                        OFF
                        OFF

01134 - Alarm Horn (H12)
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 11
                    Mileage: 225333 km
                    Time Indication: 0
                    Date: 2021.02.08
                    Time: 15:23:22

             Freeze Frame:
                        Term 15 Off
                    Voltage: 14.30 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

01134 - Alarm Horn (H12)
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 4
                    Fault Frequency: 2
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.01
                    Time: 00:00:01

             Freeze Frame:
                        Term 15 Off
                    Voltage: 12.20 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

01516 - Terminal 30; Left
            011 - Open Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101011
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 01:39:41

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.90 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

03266 - Control Circuit for Signal Horn
            009 - Open or Short to Ground - Intermittent
             Freeze Frame:
                    Fault Status: 00101001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 01:39:57

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.85 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

00927 - Terminal 30 (Right)
            011 - Open Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101011
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 01:40:01

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.85 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

02391 - Terminal 30 Reference
            011 - Open Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101011
                    Fault Priority: 4
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 00:00:02

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.80 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

03396 - Supply voltage terminal 30 for central locking
            011 - Open Circuit - Intermittent
             Freeze Frame:
                    Fault Status: 00101011
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 00:06:11

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.90 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF

00834 - Signal for Activation of Heated Rear Window
            009 - Open or Short to Ground - Intermittent
             Freeze Frame:
                    Fault Status: 00101001
                    Fault Priority: 5
                    Fault Frequency: 1
                    Reset counter: 138
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 00:06:53

             Freeze Frame:
                        Term 15 Off
                    Voltage: 11.90 V
                        OFF
                        ON
                        Term 50 Off
                        OFF
                        OFF


-------------------------------------------------------------------------------
Address 0F: Digital Radio        Labels: 8E0-035-593-SIR.lbl
   Part No SW: 8E0 035 593 P    HW: 8E0 035 593 P
   Component: SDAR SIRIUS     H07 0160 
   Revision: 00000000    Serial number: AUZ4Z7L0604743
   Coding: 0000100
   Shop #: WSC 06314 000 00000
   VCID: 36352C3EC44D21AB65F-8062

1 Fault Found:
02635 - Tuner Not Enabled/Activated
            000 - -
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 7
                    Fault Frequency: 7
                    Reset counter: 77
                    Mileage: 230266 km
                    Time Indication: 0
                    Date: 2021.03.24
                    Time: 15:26:05


-------------------------------------------------------------------------------
Address 15: Airbags (J234)       Labels:* 8P0-959-655-10.clb
   Part No SW: 8P0 959 655 Q    HW: 8P0 959 655 Q
   Component: Airbag AU1042 H09 0250 
   Revision: --------    Serial number: 003FC001LNF4
   Coding: 303142393041303030374A55304C38503053
   Shop #: WSC 06314 000 00000
   ASAM Dataset: EV_Airba10AURB4 001001
   ROD: EV_Airba10AURB4_AU35.rod
   VCID: 50F97AA64A696F9B5F3-8004

   Seat occupied recognition:
   Subsystem 1 - Part No SW: 8P0 959 339 E    HW: 8P0 959 339 E
   Component: BF-Gewichtss.  H04 0040
   Serial number: 5850000R11A26012BQ
   Coding: 000000

   Crash sensor for side airbag: driver side:
   Serial number: 3572DRB40000E584CA1/

   Front Passenger's Side Airbag Crash Sensor:
   Serial number: 3582DRB40000E5D90B1/

   Rear Side Airbag Crash Sensor (on driver's side):
   Serial number: 35128RB40000671FBB7X

   Passenger side rear thorax airbag crash sensor:
   Serial number: 35228RB40000671FBAC

   Crash sensor for front airbag: driver side:
   Serial number: 35547RB40000683C13BO

   Crash sensor for front airbag: front passenger side:
   Serial number: 35647RB40000683C1FC

6 Faults Found:
9437723 - Igniter for Passenger's Airbag
          B1002 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06

9437979 - Igniter 2  for Passenger's Airbag
          B1003 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06

9438747 - Igniter for Seat Belt Tensioner; Driver's Side
          B1006 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06

9439003 - Igniter for Seat Belt Tensioner; Passenger's Side
          B1007 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06

9439515 - Seat Belt Tensioner Igniter; rear; driver's side
          B1009 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06

9439259 - Igniter for Seat Belt Tensioner; Rear Passenger's Side
          B1008 1B [137] - Resistance Too High
          MIL ON - Confirmed - Tested Since Memory Clear
             Freeze Frame:
                    Fault Status: 00000001
                    Fault Priority: 2
                    Fault Frequency: 1
                    Mileage: 225333 km
                    Date: 2021.02.08
                    Time: 15:13:06


-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 8P0-953-549.lbl
   Part No SW: 8P0 953 549 K    HW: 8P0 953 549 K
   Component: J0527           H37 0070 
   Coding: 0014042
   Shop #: WSC 06314 000 00000
   VCID: 46D55CFEB4ADB12BF5F-8012

   Subsystem 1 - Part No: XXXXXXXXXXX
   Component: E0221           H02 0100

1 Fault Found:
00002 - Transmission Control Unit
            004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 8P0-920-xxx-17-MY8.clb
   Part No SW: 8P0 920 983 D    HW: 8P0 920 983 D
   Component: KOMBIINSTR. VDO H02 0150 
   Revision: D0H02002    Serial number: 224NK002002612
   Coding: 0272288
   Shop #: WSC 63935 004 1048576
   VCID: 3B233D0AFF6FFCC39A1-806E

2 Faults Found:
00003 - Control Module
            005 - No or Incorrect Basic Setting / Adaptation
             Freeze Frame:
                    Fault Status: 01100101
                    Fault Priority: 6
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 225333 km
                    Time Indication: 0
                    Date: 2021.02.08
                    Time: 15:22:53

00003 - Control Module
            014 - Defective
             Freeze Frame:
                    Fault Status: 01101110
                    Fault Priority: 1
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 152524 km
                    Time Indication: 0
                    Date: 2017.03.23
                    Time: 00:14:26


-------------------------------------------------------------------------------
Address 19: CAN Gateway (J533)       Labels:. 7N0-907-530-V2.clb
   Part No SW: 7N0 907 530 M    HW: 1K0 907 951
   Component: J533  Gateway H42 1623 
   Revision:   H42       Serial number: 231111F1001448
   Coding: 352102
   Shop #: WSC 06314 000 00000
   VCID: 3A2D380EFC55C5CB817-806E

2 Faults Found:
01315 - Transmission Control Module
            004 - No Signal/Communication
             Freeze Frame:
                    Fault Status: 01100100
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 98
                    Mileage: 231070 km
                    Time Indication: 0
                    Date: 2021.04.01
                    Time: 00:00:37

00381 - Databus Instrument Cluster
            004 - No Signal/Communication - Intermittent
             Freeze Frame:
                    Fault Status: 00100100
                    Fault Priority: 1
                    Fault Frequency: 2
                    Reset counter: 138
                    Time Indication: 0
                    Date: 2021.04.16
                    Time: 01:40:08


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No SW: 8P0 920 983 D    HW: 8P0 920 983 D
   Component: KOMBIINSTR. VDO H02 0150 
   Revision: D0H02002    Serial number: AUX7Z0KNFNS080
   Shop #: WSC 00000 000 00000
   VCID: 3B233D0AFF6FFCC39A1-806E

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 8P0-959-801-MIN3.lbl
   Part No SW: 8P0 959 801 Q    HW: 8P0 959 801 Q
   Component: Tuer-SG         H04 0101 
   Coding: 0001173
   Shop #: WSC 06314 000 00000
   VCID: 49CF57C2A5B35E5318D-801C

No fault code found.

-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1K0-909-14x-GEN3.clb
   Part No: 1K0 909 144 N
   Component: EPS_ZFLS Kl. 232    3301 
   Revision: 00H22000   
   Shop #: WSC 02069 000 90108
   VCID: 35372B32D94B2AB36C5-8060

1 Fault Found:
03803 - Steering Angle Sensor for Steering Aid
            000 - - - MIL ON
             Freeze Frame:
                    Fault Status: 11100000
                    Fault Priority: 2
                    Fault Frequency: 1
                    Reset counter: 255
                    Time Indication: 0

             Freeze Frame:
                    Battery Volts: 11.5 V
                        PD
                    Temperature: 50.0∞C
                    Count: 2
                    Steering Angle: 0.00∞
                    Count: 0
                        SteerAng n.Init


-------------------------------------------------------------------------------
Address 47: Sound System        Labels: 8Px-035-382.lbl
   Part No SW: 8P4 035 382 E    HW: 8P4 035 382 E
   Component: AB2 SUBWOOFERBOXH07 0180 
   Revision: 00006       Serial number: 92158121034723
   Shop #: WSC 00000 000 00000
   VCID: 36352C3EC44D21AB65F-8062

No fault code found.

-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels:. 1K0-959-702-MIN3.clb
   Part No SW: 8P0 959 802 Q    HW: 8P0 959 802 Q
   Component: Tuer-SG         H04 0101 
   Coding: 0001173
   Shop #: WSC 06314 000 00000
   VCID: 4ACD68CEA0B5554B117-801E

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 8J0-035-1xx-56.clb
   Part No SW: 8P0 035 186 AC    HW: 8P0 035 186 AC
   Component: R Concert2+     H05 0293 
   Revision: 00H05000    Serial number: AUZ1Z3L2601597
   Coding: 0750112
   Shop #: WSC 06314 000 00000
   VCID: 73B3D52A97BF7483821-8026

No fault code found.

-------------------------------------------------------------------------------
Address 62: Door, Rear Left        Labels: 8P4-959-801.lbl
   Part No SW: 8P4 959 801 F    HW: 8P4 959 801 F
   Component: Tuer-SG         H04 0050 
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 42DD40EE98858D0BD97-8016

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right        Labels: 8P4-959-802.lbl
   Part No SW: 8P4 959 802 F    HW: 8P4 959 802 F
   Component: Tuer-SG         H04 0050 
   Coding: 0001168
   Shop #: WSC 06314 000 1012544
   VCID: 43D345EA879F8403D21-8016

No fault code found.

-------------------------------------------------------------------------------
Address 77: Telephone        Labels: 8P0-862-335.lbl
   Part No SW: 8P1 862 336 A    HW: 8P1 862 336
   Component: FSE_256x BT     H44 0660 
   Revision: 00000000    Serial number: 00000005160400
   Coding: 0001277
   Shop #: WSC 06314 000 00000
   VCID: 36352C3EC44D21AB65F-8062

No fault code found.

End----(Elapsed Time: 01:24, VBatt start/end: 11.3V/11.2V. VIgn 11.2V)-----
 
   #2  

Uwe

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Hi and welcome.

Your TCU is definitely off-line. Check power, ground and CAN connections to it before condemning it.

-Uwe-
 
   #3  

Zoblod

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Thank you. I tested the battery it was either dead or dying but I have a brand new one in. ill check the CAN connections thank you for the guidance.
 
   #4  

PetrolDave

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Thank you. I tested the battery it was either dead or dying but I have a brand new one in. ill check the CAN connections thank you for the guidance.
Having replaced the battery check ALL the power and ground connections to the TCU as well as the Powertrain CAN connections to it.
 
   #5  

Zoblod

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Having replaced the battery check ALL the power and ground connections to the TCU as well as the Powertrain CAN connections to it.
Thanks this afternoon ill be trying all of those. and ill let you all know of the results.
 

Zoblod

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I haven’t tested the connections because I couldn’t find the schematics for the circuits. I found them today but as well I found out that the TCM has a crack in it and in that crack there is corrosion. So I went to a pick a part and found a 2008 Audi A4 and the TCM looked identical. So I’m guessing I’ll need to code it, how would I go about doing that?
 

Uwe

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I went to a pick a part and found a 2008 Audi A4 and the TCM looked identical.
Looks can be deceiving. The A4 has the engine in longitudinally and uses completely different transmissions than an A3, which has the engine in transversely. I think the chances that a TCM from a 2008 A4 will work in your 2012 A3 are negligibly small.

-Uwe-
 

Zoblod

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Got it I’ll test the connection to the TCM and also if it’s corrosion should I open the TCM and clean the corrosion. I’ve done it on Mac circuit boards should I try it?
 

Uwe

Benevolent Dictator
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If the TCM (mechatronic?) has a crack in it, I would say it's probably toast anyway, so I don't think there's any harm in opening it up.

-Uwe-
 

Zoblod

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Alright ill open it up this afternoon. I Pulled a TCM from another 2012 Audi A3 TDI but its a bit banged up I hope I can get something out of it.
 

Zoblod

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I put in the TCM that I found in the other Audi diesel at a pick apart now my vin on vcds is different so I’m guessing it worked but I need to recode it because the car is in safe mode. Still getting no connection to TCM error. So I gotta figure out coding now right?
 

PetrolDave

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Geez alright. So it sucks shows a new vin but still no connections 😭
So the problem lies elsewhere - most likely in the basic stuff like fuses, power, ground and CAN connections to the TCM.

You need to get a WD and a multimeter and do some old-fashioned fault finding to get the TCM talking first.
 

Zoblod

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Got it I got the circuit diagrams diving into this right now
 
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