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Thread: Interchanging automatic transmissions ME7

  1. #1
    Verified VCDS User Brkeuro's Avatar
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    Question Interchanging automatic transmissions ME7

    Hey all, first post here. Always creeping around here and always find what I need. Sadly this project is a little bit less cut and dry. Let me begin by saying I am not a professional by any means, I do alot of side work for people and this is a job I probably should have advised against. A guy brought me a blown up 2000 s4 and requested that we maintain his tip transmission, while swapping the engine with a freshly rebuilt awm 1.8 from a 2001 a4. Car starts and drives, the big issue here is that the AWM ecu wont talk to the s4 tcu. I can communicate with the transmission and all modules all day long, throw no codes in the transmission. The second the car starts up she goes into limp mode and states no communication with ecu. After I drove it down the road and back it also showed a speed sensor code and ecu/tcu incompatible. The other issues are worked out in this scan but the ones Im referring to are out of my element. Ive been trying to access the transmission data from each ecu to see if I can either just straight flash over the old files or adjust the torque/gear ratio values in the current ecu to match up with what the tcu wants to see. This is way out of my element, the local tuner wont mess with vdubs. I need advice from someone that has taken a shot in the dark at a similar deal. Not many people maintain their autos when doing this much work but guy insisted on this over a manual swap. Hoping this can be done with flashing and no more physical labor as car is mechanically set.
    I appreciate any time taken to read, respond, or critique.
    Christopher

    Code:
     #hndoc:?docid=00003BCB&xt=hnh:F76236A7ED0C796470011CDA40573A4EFF96ED6BBBE83AA55821C63DB8391CFE
    VCDS Mobile 0.4407.0.4
    
    Chassis Type:8D
    Scan: 01 02 03 08 15 16 17 25 35 37 45 55 56 57 67 75 76 77
    
    
    
    
    -----------------------------------------------------------------
    Address 01: Engine	Labels: 06B-906-018-AWM.clb
    	Part No SW: 4B0 906 018 CH	
    	Component: 1.8L R4/5VT     G   0001
    	Coding: 16251
    	Shop #: WSC 63351 000
    	VCID: 69952EA7378BE39ECC1D87FE6F-513C
    
    10 Faults Found:
    18058 - Powertrain Data Bus
    	P1650 - 35-00 - Missing Message from Instrument Cluster
    
    17837 - Circuit for Brake Vacuum Pump
    	P1429 - 35-00 - Open Circuit
    
    18032 - MIL Request Signal Active (Check TCM for errors too!)
    	P1624 - 35-10 - - - Intermittent
    
    18320 - Pressure Sensor for Brake Boost (G294)
    	P1912 - 35-00 - Short to Plus
    
    16496 - Intake Air Temp. Sensor (G42)
    	P0112 - 35-00 - Signal too Low
    
    17633 - Fuel Injector for Cylinder 1 (N30)
    	P1225 - 35-00 - Short to Ground
    
    17635 - Fuel Injector for Cylinder 3 (N32)
    	P1227 - 35-00 - Short to Ground
    
    17636 - Fuel Injector for Cylinder 4 (N33)
    	P1228 - 35-00 - Short to Ground
    
    17634 - Fuel Injector for Cylinder 2 (N31)
    	P1226 - 35-00 - Short to Ground
    
    18034 - Powertrain Data Bus
    	P1626 - 35-10 - Missing Message from TCU - Intermittent
    
    
    -----------------------------------------------------------------
    Address 02: Auto Trans	Labels: 01V-927-156.lbl
    	Part No SW: 8D0 927 156 BS	
    	Component: AG5 01V 2.7l5VT USA 3132
    	Coding: 01002
    	Shop #: WSC 06325 000
    	VCID: 7F4190FF590F7D2E02F979E641-5160
    
    3 Faults Found:
    18249 - Engine Control Module / Transmission Control Module Incompatible
    	P1841 - 35-00 - -
    
    
    18258 - Powertrain Data Bus
    	P1850 - 35-10 - Missing Message from ECU - Intermittent
    
    17100 - Transmission Input Speed Sensor (G182)
    	P0716 - 35-00 - Implausible Signal
    
    
    -----------------------------------------------------------------
    Address 03: ABS Brakes	Labels: 8E0-614-111-EDS.lbl
    	Part No SW: 8E0 614 111 A	
    	Component: ABS/EDS 5.3 QUATTRO D1002
    	Shop #: WSC 00000 000
    	VCID: 1C7B4773A859C636871B364258-51CE
    
    1 Fault Found:
    00283 - ABS Wheel Speed Sensor; Front Left  (G47)
    	30-10 - Open or Short to Plus - Intermittent
    
    
    -----------------------------------------------------------------
    Address 08: Auto HVAC	Labels: 8D0-820-043-1D.lbl
    	Part No SW: 8D0 820 043 P	
    	Component: A4     KLIMAAUTOMAT D57
    	Coding: 00160
    	Shop #: WSC 06325 000
    	VCID: 2D1D9AB7C3E33FBEE0C5F30E7B-2596
    
    5 Faults Found:
    00779 - Outside Air Temp Sensor (G17)
    	30-10 - Open or Short to Plus - Intermittent
    
    01272 - Positioning Motor for Central Flap (V70)
    	41-10 - Blocked or No Voltage - Intermittent
    
    00792 - A/C Pressure Switch (F129)
    	31-00 - Open or Short to Ground
    
    
    01206 - Signal for Duration of Ignition Off Time
    	27-10 - Implausible Signal - Intermittent
    
    01582 - Signal for Coolant Temperature
    	30-10 - Open or Short to Plus - Intermittent
    
    
    -----------------------------------------------------------------
    Address 15: Airbags	Labels: 8D0-959-655-AI8.lbl
    	Part No SW: 8D0 959 655 G	
    	Component: Airbag Front+Kopf  1002
    	Coding: 00304
    	Shop #: WSC 06325 000
    	VCID: 3A37A1EB02AD9806754780AAC2-5118
    
    2 Faults Found:
    01217 - Side Airbag Igniter; Driver Side (N199)
    	32-10 - Resistance Too High - Intermittent
    
    01218 - Side Airbag Igniter; Passenger Side (N200)
    	32-10 - Resistance Too High - Intermittent
    
    
    -----------------------------------------------------------------
    Address 17: Instruments	Labels: 8D0-920-xxx-17.lbl
    	Part No SW: 8D0 920 980 Q	
    	Component: B5-KOMBIINSTR. VDO D12 
    	Coding: 00244
    	Shop #: WSC 40205 000
    	VCID: 3935BEE707AB931E7C3D77BEDF-5160
    
    No fault codes found.
    
    -----------------------------------------------------------------
    Address 35: Centr. Locks	Labels: 8D0-862-257.lbl
    	Part No SW: 8L0 862 257 N	
    	Component: CV-Pump             D11
    	Coding: 16140
    	Shop #: WSC 06325 000
    	VCID: 40C3D3036471C2D63B83C21274-4F2E
    
    3 Faults Found:
    01374 - Alarm triggered by Terminal 15
    	35-00 - -
    
    
    01370 - Alarm triggered by Interior Monitoring
    	35-00 - -
    
    
    00955 - Key 1
    	09-00 - Adaptation Limit Surpassed
    
    
    
    -----------------------------------------------------------------
    Address 45: Inter. Monitor	Labels: 4B0-951-173.lbl
    	Part No SW: 4B0 951 173	
    	Component: Innenraumueberw.    D03
    	Coding: 00101
    	Shop #: WSC 06325 000
    	VCID: E083B38344B122D69BC3A29254-4AA4
    
    No fault codes found.
    
    -----------------------------------------------------------------
    Address 55: Xenon Range	Labels: 4B0-907-357-AUT.lbl
    	Part No SW: 4B0 907 357	
    	Component: LEUCHTWEITEREGLER  D003
    	Coding: 00012
    	Shop #: WSC 06325 000
    	VCID: E58DA2975B9347FE68F5DBAE93-5160
    
    No fault codes found.
    
    -----------------------------------------------------------------
    Address 56: Radio	Labels: 8D0-035-1xx-56.lbl
    	Part No SW: 8D0 035 195 A	
    	Component:  Radio              D00
    	Coding: 00115
    	Shop #: WSC 06325 000
    	VCID: 240B7F939029FEF63F6B8EA2E0-4B5C
    
    1 Fault Found:
    00856 - Radio Antenna
    	36-10 - Open Circuit - Intermittent
    Last edited by Boki Ar; 03-15-2018 at 01:37 PM. Reason: [Code] Tags

  2. #2
    Benevolent Dictator Uwe's Avatar
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    ME7 ECUs (or more specifically the software in them) are generally not interchangeable between manual trans and auto trans applications. That ECU (4B0 906 018 CH) looks to be a manual trans ECU.

    Then there's the added complication that the software in the TCU expects a 2.7T engine.. "AG5 01V 2.7l5VT USA" and I'm not sure how happy it will be with anything else.

    -Uwe-
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  3. #3
    NostraJackAss Jack@European_Parts's Avatar
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    OP:

    What Uwe stated, the stall speed of the TQ converter is different too and it's tampering!
    Last edited by Jack@European_Parts; 03-15-2018 at 03:57 PM.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    Above Magic! No Written record, AUTO-SCAN or Appointment = NO HELP!
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  4. #4
    Verified VCDS User Brkeuro's Avatar
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    I very much appreciate the understanding and not flaming me for lack of knowledge. In essence I either must swap in the proper 1.8 auto trans, ecu, and tcu, or go manual? Would it be worth sourcing an auto ecu to try? or is it essentially just prolonging the agony at that point. I definitely had a large lapse in judgement on this whole deal. Just want to get the car driving the easiest way possible at this point, without swapping half the driveline and pedals on my dime with my parts. Good thing I love a good learning experience
    If only my youthful confidence came with a bit of old man wisdom.

  5. #5
    NostraJackAss Jack@European_Parts's Avatar
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    Retrofits......
    Not a qualified repair.

    ME7.1 came in the 2.7T S4 and the 1.8T used ME7.5

    This is very bad FOD!
    Last edited by Jack@European_Parts; 03-16-2018 at 08:31 AM.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    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 )
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  6. #6
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by Jack@European_Parts View Post
    Retrofits......!
    Good point. Moving...

    -Uwe-
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  7. #7
    Benevolent Dictator Uwe's Avatar
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    Quote Originally Posted by Brkeuro View Post
    In essence I either must swap in the proper 1.8 auto trans, ecu, and tcu, or go manual?
    I'm reasonably confident the ECU could have auto software put in it, but... I rather doubt that's enough to make the TCU happy. Of course, you could also a matching 1.8T TCU, but then you run into the question of mechanical differences in the transmission; Jack already mentioned a different torque converter stall speed.

    -Uwe-
    Lock-down of sick people: Quarantine
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  8. #8
    NostraJackAss Jack@European_Parts's Avatar
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    Some AWM Audi ECU's for 1.8T of this time frame, support an alternate coding table for selection of the transmission type and other powertrain components.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    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 )
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  9. #9
    Verified VCDS User Brkeuro's Avatar
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    Thank you two for the conversation, it is all very interesting. Yes, I do realize it was not a professional deal. It was for a more so friend and we were toying with things, I have ordered a rebuild kit for a trans he has and will manual swap the car it looks like. I had known of the software update and the hard wiring differences, I was a fool to think we could make the trans work with a different motor. I do understand that through and through as well. I am always learning, I would not have taken on a job like this for anyone else, i can confidently say that. At least with taking a random shot in the dark at anything, much less something as large as the one thing that transfers power to the wheels. that is interesting about the possible alternate coding, although Im sure that would only extend so far. Using an s4 transmission seems beyond the realm. To access the "alternate coding table" would I have to be using the bench flashing setup and try to dig somewhere im not so comfortable, or is that something that is all accessible and editable with vcds? Again this is strictly for me to learn at this point, car is going manual. and again, not a standard rate customer off the street. Just a decent acquaintance that has a blown s4 and a rebuilt awm engine, figured I would try it in the background and ended up being a lesson learned.
    I really appreciate all the information and Im here to soak up as much more as possible. Thank you guys.

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  11. #10
    Ross-Tech Employee Dana's Avatar
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    Quote Originally Posted by Brkeuro View Post
    To access the "alternate coding table" would I have to be using the bench flashing setup and try to dig somewhere im not so comfortable, or is that something that is all accessible and editable with vcds?
    This S4 transmission probably just isn't going to play nice but I agree with Jack. Unlike the Golf/Jetta/Beetle (transverse driveline cars) some of the ECMs in Passat and A4 models will support coding for both transmission types and even FWD/AWD in some cases. When using VCDS on a PC you will see a pop-up balloon with all of the various options. This is an example from an older TDI:
    http://www.ross-tech.com/vcds/tour/s...ng-balloon.png

    In cases where modified coding is rejected - that's where you need high powered tools or a tuner to step in and tweak things that are not possible with VCDS or the factory level scan tool.

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