Retrofit Bluetooth with a TCU instead of a ULF in any I-Bus Car

neiloakley · #1 02-14-2010, 06:13 AM

Hi Jochen - thanks for taking the time to reply. I've done all the wires i thought i needed, and now it comes up 'Activate Phone' on the nav screen correctly, but i'm unable to get the TCU to go into pairing mode.

Quote:

Originally Posted by KiwiJochen

The circuit diagram shows connector numbers, and also shows the connector pins, wire colour, wire size and wire function.
Just click the connector number for a full table.

Not for me it doesn't! When i look at the TCU wiring diagram it doesn't give me wire colours. So i have no idea how to give the TCU the 4 wires from the eject box it needs, when the BIT2 had EIGHT wires.

(see diagrams below)

Quote:

Originally Posted by KiwiJochen

Thats all the info you need.
You see the wiring and signals of the existing BIT2
You see the wiring and signals of the wanted new TCU

Simply transfer the relevant wires from the old to the new

Its only simple if you know how to do it.

Quote:

Originally Posted by KiwiJochen

Of course, some will be no longer required, and you may need to reassign some wires running from phone to the eject box.

But it is pretty straight forward.

Work in this order:
Ground
Ibus
Power
Microphone
Audio Out
Eject Box
SOS switch (if fitted)

That's all you need.

Ground - done
Ibus - done
Power - done
Microphone - done
Audio Out - done
Eject Box - NOT DONE/CANT DO

Why do i need to connect the eject box anyway? I want to use bluetooth, i have no interest in pluggin in my phone?

KiwiJochen · #2 02-14-2010, 06:19 AM

Quote:

Originally Posted by neiloakley

Hi Jochen - thanks for taking the time to reply. I've done all the wires i thought i needed, and now it comes up 'Activate Phone' on the nav screen correctly, but i'm unable to get the TCU to go into pairing mode.

Not for me it doesn't! When i look at the TCU wiring diagram it doesn't give me wire colours. So i have no idea how to give the TCU the 4 wires from the eject box it needs, when the BIT2 had EIGHT wires.

Why do i need to connect the eject box anyway? I want to use bluetooth, i have no interest in pluggin in my phone?

If you don't want the eject box then don't wire it. Just ignore it.

The only functions the eject box provide are:
1. phone charging
2. passive antenna coupling
3. physical holding of the phone

Pairing mode of the TCU is initiated automatically when you turn the ignition from off to acc/on, but only for first 15s or so

Jochen

neiloakley · #3 02-14-2010, 06:22 AM

OK i'll leave the eject box off

But it still doesn't pair

Going to start from scratch and see if i made any mistakes.