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  #191  
Old 12-29-2012, 09:45 AM
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If you re-pin the ULF/TCU plug, then it will work. Many people have made BITII to TCU/ULF conversion adapter harnesses.
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  #192  
Old 12-29-2012, 11:09 AM
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I did re-wire the BIT2 connector to TCU, but its still not recognized.
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  #193  
Old 12-29-2012, 03:02 PM
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Try this: BIT-II to TCU/ULF Adapter Harness
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  #194  
Old 12-29-2012, 03:24 PM
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I made the re-wiring according to the following graphs:






The first one is BIT2 and the second is TCU. I double-checked the wiring and even measured if ground and 12v are active at the 54pin connector, but the TCU doesnīt start up.

Iīve been told, that TCUs in euro e46 were used from 2005 on and earlier cars couldnīt be retrofitted. instead i should buy a ULF and would be ready
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  #195  
Old 12-29-2012, 03:28 PM
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Did you also make an adapter for the eject box plug? Try to copy the pin routing in that reference post. It worked for that person. It is possible that you have a bad TCU, but I would bet first on the wiring adapter.
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  #196  
Old 12-29-2012, 04:42 PM
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The pinout in the mentioned thread is for an ULF, not for a TCU. I checked the wiring for ULF, its slightly different to TCU but only minor changes.

I did not change the eject box wiring, as I changed the eject-box wiring at the TCU. Even though i donīt think an eject-box is necessary to start the TCU. I think, and i could be false here, that the TCU should be recognized by the vehicle just with 12V, ground and Ibus?!

Can anyone confirm this point?
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  #197  
Old 12-29-2012, 04:47 PM
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TCU and ULF are the same at the 54-pin plug. The differences are not material. The essential pins are I-Bus, power, and ground. I-Bus in some cars routes through the center console eject box plug, so that is why that adapter is important.

Did you validate with a multi-meter that you are getting the three critical sources at the 54-pin plug?
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  #198  
Old 12-30-2012, 03:37 AM
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So this is



exactly the same as this one?



they ARE different, even the differencies are minor.

I did not try to multi-meter the ibus, i guess bus system is not intended to be measured this way, but yes, i measured both ground contacts and both 12v supply on their own and against each other. they are ok.

ibus must be ok, as the adapter routes the bus signal to the SES system and SES is still working.
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  #199  
Old 12-30-2012, 07:22 AM
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Mulitmeter the I-Bus. You will get a positive voltage in the 5V - 7V range if it is connected.
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  #200  
Old 12-30-2012, 08:37 AM
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OT:
Where do you still get those wiring diagrams? Wds spaghetticoder removed BMW.. Also the wds here in xoutpost is not functioning properly.
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