Any Electronics designers want to assist in a VERY cool mod?

Originally Posted by Arty

In that case, if you are ditching the E46 LEDs {and if they are not used for the dash} you can simplify.

gonna try your idea Arty.... was my original thought, but I also thought the shift selector switch would be grounded which according to schematic, it's not.... Been trying to work from schematics rather "testing" on my car, but need to pull apart console and check wiring of steptonic switch and selector switch. If so, then , gonna replicate your version; if not, then need to go with relay option.......

It's WORKING AND INSTALLED!!!

Quick cell pics for now, but it's installed and operational.....

Have to find someone to sew the leather and make it look factory......but it runnning....

required isolating selector switch and using relay on M/S signal...... pulled pieces from original board (extra I bought for this purpose)..... but other than finishing (enabling P shiftlock, covering old PRND indicators and leather)..... it's DONE

DIY to follow....

cool mods man...wish i have the time & resources to do it to mine to...great job!

Thanks!! This DIY had me stumped as schematics, pinout, etc were not readily available; had to measure/trace out complete circuit on both current shift assembly and the DCT shifter itself.... What a PITA!!!! well, now that I've got it worked out, I could make a DIY kit to retro fit the shifter. To do the retro-fit, there is an interface circuit that connects the DCT shifter with the existing stock circuitry. Made the mod so it's completely reverseable (no altering of factory wiring; that's my policy with all mods; they must be removeable and leave no footprint behind)....... All alterations or mods were done to shifter and shifter assembly ONLY! I can pull this and replace with original factory shifter and shift knob and return completely to stock in about 10 minutes; most of the time is removing and replacing trim.....disconnect 3 connectors and complete interface assembly (black box) and wiring harness can be removed; that's it..... Interface (black box) is tucked in front left corner of console..... Looking @ using a boot from a std to eliminate the PRND display on console.....

Thread closed. Got my answers.... see results here: http://forum.e46fanatics.com/showthread.php?t=775641

[QUOTE=Nachos23;11939440]what ends up happening is the collector is pulled to 0.7 vdc when I close the switch (selector lever) and ground base; its Collector voltage is 5vdc when transistor off (emitter @ 0 vdc). The emitter voltage matchs the collector voltage @ 0.7vdc (which is not enough to power the LED; testing has shown I need about 4.5vdc to get LEDs to light). How can I pull-up the collector voltage[/qoute]I know you have a working solution now, but perhaps look closely at your circuit, are you sure the transistor is a PNP, that you have the pins round the right way and once that is done, try the circuit without a load connected at the emitter. I am curious as to why you are not getting the desired results.

[QUOTE=Arty;11951105]

Originally Posted by Nachos23

what ends up happening is the collector is pulled to 0.7 vdc when I close the switch (selector lever) and ground base; its Collector voltage is 5vdc when transistor off (emitter @ 0 vdc). The emitter voltage matchs the collector voltage @ 0.7vdc (which is not enough to power the LED; testing has shown I need about 4.5vdc to get LEDs to light). How can I pull-up the collector voltage[/qoute]I know you have a working solution now, but perhaps look closely at your circuit, are you sure the transistor is a PNP, that you have the pins round the right way and once that is done, try the circuit without a load connected at the emitter. I am curious as to why you are not getting the desired results.

2n3906 PNP transistor. Only load was LED. When ground not connected emitter voltage was measured @ 0vdc.... correct result (10k pull-up on collector). When I would ground the base, the emitter would turn on (maybe too much; over saturated) and pull down the collector voltage to 0.7vdc.... emitter would have same 0.7vdc. Current draw from LED was 11mA @ 4.5vdc. Stumped me, so I went back to original thought, but thanks for the idea of isolating selector circuit, made me look more closely @ it to see if it could be done and whatcha know; it could..... LOL

hi i have a 2009 E93 bmw 320D msport convertible ... i have a youtube video showing the car ...
i have the DCT gear shifter ... the same as you have retro fitted ... i am wanting to make the circuit board to fit my car ... i would really appreciate a schematic diagram of the componets used to retro fit my car .. if you send me an email of your mobile nomber i can call u back ... zam72@hotmail.co.uk i would really appreciate your wisdom in this matter.
Thanks