SMG to 6MT Conversion

[George Hill]

OK guys, I will be installing DCT tranny and not manual like what most do
I don't need the clutch switch which is fine. i will be keeping the SMG display for gears, now what else beside the manual tune that needs to be fixed or coded on the car?

I think you will be fine if you just code out the clutch switch to start function.

[kokgo20]

Are you going to be using the HTG controller?

Yes
got the tranny, waiting on the controller to be shipped

[liam821]

OK guys, I will be installing DCT tranny and not manual like what most do
I don't need the clutch switch which is fine. i will be keeping the SMG display for gears, now what else beside the manual tune that needs to be fixed or coded on the car?

Are you going to be using the HTG controller?

[ATB88]

OK guys, I will be installing DCT tranny and not manual like what most do
I don't need the clutch switch which is fine. i will be keeping the SMG display for gears, now what else beside the manual tune that needs to be fixed or coded on the car?

For real??

[kokgo20]

OK guys, I will be installing DCT tranny and not manual like what most do
I don't need the clutch switch which is fine. i will be keeping the SMG display for gears, now what else beside the manual tune that needs to be fixed or coded on the car?

[Pace]

Yes it needs to be 61319122700. BMW erroneously superseded it in the ETK to the non-M part. I hear if you can convince the parts guy to actually place the order for the old part number it will go through. 61319122701 (Euro M3/M5 switch) would work too, though it's unclear what's different about that one (I think it may not support the clutch interlock).

Thanks Terra!

[terra]

Yes it needs to be 61319122700. BMW erroneously superseded it in the ETK to the non-M part. I hear if you can convince the parts guy to actually place the order for the old part number it will go through. 61319122701 (Euro M3/M5 switch) would work too, though it's unclear what's different about that one (I think it may not support the clutch interlock).

[Pace]

Does anyone know if the clutch switch must be part # 61319122700? Still having issues with cruise control and have checked all wiring and coding, everything seems to be working. My only idea now is the supposedly interchangeable part I was sent (#35426876898) does not work for the E46 M3(and likely Z4M and E39 M5).

[rcarson25]

The SMG computer should not be in the car period. Disconnect it, and remove it.

Thanks and good to know!

[ATB88]

Just a quick question with the way I wired this I will not have the SMG computer in the car when I code it to manual. Does anyone see an issue with the SMG computer not being in the car when coding to manual?

The SMG computer should not be in the car period. Disconnect it, and remove it.

[rcarson25]

Just a quick question with the way I wired this I will not have the SMG computer in the car when I code it to manual. Does anyone see an issue with the SMG computer not being in the car when coding to manual?

[rcarson25]

For those who have done the wiring as mentioned in the original post (with gear position switch connected), it says, "Next connect the ground connector from the SMG ECU to the DME pin 20 at connector x60002 (24 pin black connector) next to the 9 pin power connector on the engine DME. Note that pin 20 on the DME is blank, and you will need to disassemble it and insert the wire with a female pin that will click into place."

Is the original poster referring to the brown ground connector wires, circled in green, this photo:


So I am suppose to connect any brown wire, circled in green, to the blue pin 20 wire at x60002 circled in green?

Thanks in advance!

just re read your post, pin 20 should be blank in the Black DME plug. You should not have a wire to tap into. I took the pin out of the SMG ecu connector , yes the brown wires you have circled and then put it into the blank spot at pin 20 of the black DME plug.

[rcarson25]

okay I was reading this wrong. I thought you had to pin the SMG ecu with pin 2 from clutch switch. This all makes sense now. Pin 2 goes to a wire on SMG
ECU pin that goes to a sensor. The SMG ECU ground pin goes to an empty slot on the main ECM. This all makes sense to me now.


Also where are people getting the pins needed for the DME and ECW, which ones are they, just stealing them from other connectors?

[ATB88]

I am at this part as well. The only thing I am confused about here is doesn’t the SMG ECU get removed at the end? Based on the instructions it seems pin 2 from the clutch switch goes to the SMG ECU and then the SMG ECU gets connected to the main DME. I know this is only for cruise control but shouldn’t there be a method that just takes pin2 of the clutch switch directly to the DME so the SMG ECU can be deleted. Has anyone done the conversion, ditched the SMG ECU and retained cruise control?

One other question does anyone know which female pins are needed? There are about a million different options for different connectors and I want to be sure to get the right ones.

This was confusing to me too -- the SMG ECU does get removed, BUT wires in the SMG ECU's connectors are also connected to wires that route to the main ECU and various sensors. So, pin 2 from the clutch switch indeed goes to whatever wire the DIY says, which routes into that SMG ECU connector, but the SMG ECU must be removed for everything to work properly. When I did this I left the SMG ECU in the car and the connector attached to it, because I figured that the SMG ECU must at least be there for the signals to get where they're going -- not the case, and leaving the SMG ECU connected will actually cause issues. Follow the instructions as written, connect the mentioned wires to the SMG ECU's connector, but remove the SMG ECU itself from the car

[rcarson25]

Perfect timing on this question... this is where I am on mine as well. Subscribed!

I am at this part as well. The only thing I am confused about here is doesn’t the SMG ECU get removed at the end? Based on the instructions it seems pin 2 from the clutch switch goes to the SMG ECU and then the SMG ECU gets connected to the main DME. I know this is only for cruise control but shouldn’t there be a method that just takes pin2 of the clutch switch directly to the DME so the SMG ECU can be deleted. Has anyone done the conversion, ditched the SMG ECU and retained cruise control?

One other question does anyone know which female pins are needed? There are about a million different options for different connectors and I want to be sure to get the right ones.