Dct swap 335i 06 build date

[335iHector]

I’m doing a dct swap on my 07 335i e92 but it’s a 06 build date. The connector from my vehicle harness to the dct harness are completely different. What am I suppose to do at this point? I have almost everything installed but this is where I’m stuck right now. Any help would be appreciated.

 

[Jern54]

skip the connector and solder the wires?

Edit: Or re pin the wires in the connector

 

[335iHector]

skip the connector and solder the wires?

Edit: Or re pin the wires in the connector

Any diagram that would help me out? Most diagrams are for newer build dates and not a old build date like mine.

 

[Asmo]

Have you done FRM,JBBE,MSD81 upgrade as well?

 

[335iHector]

Have you done FRM,JBBE,MSD81 upgrade as well?

Yes I have done everything else

 

[Coupes66]

I don't know if you have had a look at the series of videos on Zero to 60 Youtube where Andrew installed a DCT in his 335i. He goes through the wiring options.

 

[335iHector]

Yes I have already!

I don't know if you have had a look at the series of videos on Zero to 60 Youtube where Andrew installed a DCT in his 335i. He goes through the wiring options.

they don’t show it tho and they don’t explain if you have completely different connectors

 

[Arndtcraft1]

I’m doing a dct swap on my 07 335i e92 but it’s a 06 build date. The connector from my vehicle harness to the dct harness are completely different. What am I suppose to do at this point? I have almost everything installed but this is where I’m stuck right now. Any help would be appreciated.

Close to a year later...but Im in the same situation, and could surely use any suggestions, or unique 06/early 07 specifics. Id assume by now, you have it all sorted?

 

[RTA]

Is this not documented in the BMW workplace guides?

You migth otherwise check the Bentley guide, it comes with all the wiring info..

 

[Arndtcraft]

Is this not documented in the BMW workplace guides?

You migth otherwise check the Bentley guide, it comes with all the wiring info..

Where would one find these? … as in online sources?

 

[m_a_itani]

skip the connector and solder the wires?

Edit: Or re pin the wires in the connector

I’m having the same problem do you know how to do that please.

 

[RTA]

Service Documentation BMW

FREE. Repair Manuals from BMW. Also available: Electrical Wiring Diagrams, Engine and Transmission Rebuild Manuals.

www.bimmer-service.com

 

[m_a_itani]

Service Documentation BMW

FREE. Repair Manuals from BMW. Also available: Electrical Wiring Diagrams, Engine and Transmission Rebuild Manuals.

www.bimmer-service.com

its similar to newtis not much info

 

[RTA]

He was looking for wiring diagrams, most is there... like newtis, same source.

 

[m_a_itani]

Yes but it’s not easy I’m doing the same thing

 

[Tamaluko]

I just came across this thread. I don't know if this info will be useful as it's been a few months.



I finished my DCT swap on a 06 build date car. It is possible and you can completely ignore the ECU junction box. I took a cut off DCT plug that I bought from Seems legit garage and re pinned it so that all the wires from the inside of the car near the GWS (DCT shifter) end up where they are supposed to on the transmission plug.



I'll try to explain a little bit better.

I kept the original pre 2007 transmission harness. I de pinned the AT 6HP21 connector and tossed it and re pinned the DCT connector to the original harness.

I then sat in my car with a multi meter in continuity tester mode and back traced all the pins from the newly added DCT plug to inside the cab near the GWS.


The picture that says X8500 is what you need to pin the new DCT plug for and the other picture with the X511 is the 10 pin connector that goes in to the GWS. For example pin #2 (for the LIN Buss) from the X511 GWS connector needs to some how, some way, end up on Pin #11(Lin Buss) of the DCT X8500 plug. So the GWS can communicate properly with the DCT.

You will have to do this for the remaining wires of the X8500 plug. If I remember correctly the only ones you need to worry about finding is the signal for the parking lock, pin #13 and parking lock voltage wires, pin #12 both need to go from those pins and end up at the GWS parking lock 2 pin connector. Put one probe of your meter on the x8500 pin you want to find. Set it to audible continuity tester and start probing the old AT floor shifter connectors. You will find them there. Either cut and splice the wires you need or make a harness like I did to make the process easily reversible.

As a last note I used the EKPM (fuel pump module) for both the PT-CAN HIGH (pin #3)and LOW (pin #4) wires along with the necessary Terminal 15 Wake Up signal (pin #5) for the GWS connector X511.

I'm not very good at making diagrams like the one that is floating around from the zero to 60 channel but I'll give it a shot soon to see if I can make a DIY for the pre 2007/03 guys.