Possible TCM Trouble??
 

I need some help in diagnosing a problem with my 2003 audi tt roadster (fwd) 1.8t. It all started whenthe battery went dead. Go in turned the key and nothing happened. Turned the key again and the console went blank and the radio went blank. Closed and locked the door and the security light in the door wasn't even blinking.New battery was put in and started the car andproblems begin. The transmission clunks into reverse andcarcan back up. Put the transmission in Drive andit clunks intoa gear. The transmissionstays in that one forward gear. The radio does not work. Then I notice that on the instrument sluster the ESP light stayson whether I push the button to turn it on or off. The tachometer works aswell as the gas gaugeand the coolant temperature guage. The speedomoter does not work. Mileage, date and time work.In the middle lcd of the instrument cluster only the 2 middle sections of it display. The temperature in the 2nd from top section and the mpg, miles leftin gas remaining, etc. The bottom section of the lcd normally displays the transmission D,R,1,2,3 etc. but is blank. The top part of the lcd normally display the radio information I believe. When I turn the key to start, the middle lcd says "Depress clutch to startengine." but the transmission is a tiptronic automatic. Thetiptronic does not work ifI push the gear shift over to the right to shift up and down as needed. I have checked fuse panel and under the hood (top of battery and back by firewall) and all looks okay to me.

I have used vag-com to resolveother smaller problems, but I need some help indiagnosing the problem correctly with this one. I have the Bently repair book, but am not real good at reading their electronic diagrams. They arechopped up into small diagrams and are hard to read they are so small. Any helpis appreciated. What steps would I take to work thru the electical system to determine the problem.The scan mentions tcm a few times. But also says can't communicate with tcm. Not sure if wiring or some part is malfunctioning or it might be the tcm. Ihave posted the vag-com scan below. Thanks for any help.

VAG-COM Version: Release 704.1
Data version: 20071016
Friday,23,May,2008,12:12:38:19643
Chassis Type: 8N - Audi TT
Scan: 01 02 03 08 15 17 22 35 37 45 55 56 76 77

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Address 01: Engine Labels: 8N0-906-018.LBL
Part No: 8N0 906 018 BD
Component: 1.8L R4/5VT G 0003
Coding: 07570
2 Faults Found:
18034 - Powertrain Data Bus: Missing Message from TCU
P1626 - 35-00 - -
17837 - Circuit for Brake Vacuum Pump: Open Circuit
P1429 - 35-00 - -
Readiness: 0110 1101
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Address 03: ABS Brakes Labels: 8N0-907-379.LBL
Part No: 8N0 907 379 J
Component: ESP FRONT MK60 0101
Coding: 0019473
1 Fault Found:
01315 - Transmission Control Module
004 - No Signal/Communication
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Address 08: Auto HVAC Labels: None
Part No: 8N0 820 043 A
Component: TT-KLIMAVOLLAUTOMAT D03
Coding: 00140
No fault code found.
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Address 15: Airbags Labels: None
Part No: 8N0 959 655 B
Component: Airbag Front+Seite 6000
Coding: 01103
1 Fault Found:
00532 - Supply Voltage B+
07-10 - Signal too Low - Intermittent
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Address 17: Instruments Labels: 8Nx-920-xxx-17.LBL
Part No: 8N1 920 980 E
Component: KOMBI+WEGFAHRS. M73 D14
Coding: 06244
3 Faults Found:
01315 - Transmission Control Module
49-00 - No Communications
01304 - Radio
49-00 - No Communications
01305 - Databus for Infotainment
37-10 - Faulty - Intermittent
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Address 35: Centr. Locks Labels: 8N7-962-267.LBL
Part No: 8N7 962 267 F
Component: Central Lock/Alarm D09
Coding: 15932
No fault code found.
End
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