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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > ConnectedDrive / I-Drive / Navigation Related Discussion > TCU to Combox pin help (four remaining pins)



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      09-24-2012, 08:43 AM   #1
zkb21
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TCU to Combox pin help (four remaining pins)

I have four wires left over from pinning the 54-pin(X695) TCU connector to the 26-pin(X34130) Combox Telematic connector.

The remaining wires from the TCU are:

Pin Description
--- -----------
3 Switch-on signal for battery charging (Cradle On)
ON signal for the charger electronics in the snap-in
adapter

24 Signal from wheel speed sensor, front left
25 Signal from wheel speed sensor, front right

46 Signal from transmit/receive button (Cradle Key)
Call accept/transfer/paring button


Does anyone know where these pins from the TCU map to the Combox? The wiring diagrams that I have seen does not indicate a mapping for these pins.
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      09-26-2012, 10:15 AM   #2
zkb21
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Come on man... Anybody???
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      12-20-2012, 05:51 PM   #3
travism3
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Hi, did you manage to figure out all the pins? If so could you please send me the info? Also did yours have MULF2 & TCU?
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      12-21-2012, 08:23 AM   #4
zkb21
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I have the TCU only...

Here is the mapping from TCU to combox:

TCU-----------------------Combox

Pin---Description-----------Pin---Description

1----Mic(pos)--------------25----Mic(pos)
4----AUX-GND-------------10----AUX-GND
15---Crash Sig.-------------7----Crash Sig.
17---30 Power+ 5A---------2----30 Power+ 5A
18---30 Power+ 10A--------1----30 Power+ 10A
19---MIC(neg)------------12-----MIC(neg)
21---MIC Shield-----------11-----MIC Shield
23---Shield---------------22-----Shield
31---SOS sig.f Button-----18-----SOS sig.f Button
33---Wakeup-------------15-----Wakeup
36---31 GROUND(neg)-----14----31 GROUND(neg)
37---emerg. Speak.(pos)--21----emerg. Speak.(pos)
38---emerg. Speak.(neg)--20----emerg. Speak.(neg)
50---emerg. butt LED-----17----emerg. butt LED
54---GROUND-

Last edited by zkb21; 12-21-2012 at 08:33 AM.
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      05-05-2014, 04:48 PM   #5
jimmelo
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Did you ever find an answer to what pin #3 is for? I have the same but haven't found a pin out for it.

Thanks,
Jim
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      05-05-2014, 05:19 PM   #6
zkb21
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Look at my initial post in the thread, there is a description for pin 3. I think that you are not going to need it for the combox.
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      08-10-2014, 09:27 PM   #7
jezzy
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Anyone using the above wiring with a snap-in? are you getting power to your snap-in?
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