Clutch switch

[bmwfnatic]

I bought a SMG ZCP converted to 6 speed but I have similar issue with OG. This is the clutch switch I have on the car.

You’ll need to source a used brown or green one, those are not available new, I believe that is the consensus.

The black ones do not work, as they switch ground instead of power, they are intended for the non M cars.


Brown = USA, allows you to retain clutch in to start safety (4th pin)
Green = Euro, can start car without touching clutch, no 4th pin, need to code EWS to Euro.

Both work, also with cruise control (some misinformation above) I have green on my personal car.

You can also source them from E39 M5’s, maybe there are cheap M3/M5 pedal assemblies on ebay with the switches still installed.

[maupineda]

I have green installed on my Z4M and it works too, as mentioned, I had to code the car to Euro spec

I still have my original brown switch which I thought was broken but it was not. ended up being a wiring issue.

[ejendow]

You’ll need to source a used brown or green one, those are not available new, I believe that is the consensus.

Green Euro switches are still available new. Additionally, from what I have heard, the new black M3 switches (ending in 700) work as well.

The only switch now that will not work in our cars are the non-M switches (ending in 898).

[maupineda]

Green Euro switches are still available new. Additionally, from what I have heard, the new black M3 switches (ending in 700) work as well.

The only switch now that will not work in our cars are the non-M switches (ending in 898).

this was false internet information, I actually got TWO of the black flavor, and they did not work.

Brown - good
green - good if coded
black - not good, the issue with this is the cruise control, it does not work.

[M3LSB.Gab]

I bought the black clutch switch from bmw, that replace the NLA brown one. Will receive it in 3-4 days. Will keep you updated. Anybody has an image/diagramm on how properly connect it ?

• 61319122700

[ejendow]

this was false internet information, I actually got TWO of the black flavor, and they did not work.

Brown - good
green - good if coded
black - not good, the issue with this is the cruise control, it does not work.

When did you buy these two switches?

[maupineda]

Back in 2022 I think. At the time the browns where already NLA and green was still available from FCP.

[M3LSB.Gab]

I replaced the clutch switch with the new black one that replaces the NLA brown one (PN 61319122700 - written 314 on it). The car idles better and no longer stall at stop, but it is not perfect. Maybe i'm too used to newer bmws now ^^. The one that was installed had 180804 written on it.

[ejendow]

I replaced the clutch switch with the new black one that replaces the NLA brown one (PN 61319122700 - wrote 314 on it). The car idles better and no longer stall at stop, but it is not perfect. Maybe i'm too used to newer bmws now ^^. The one that was installed had 180804 written on it.

did you install the gear position sensor on your car?

[M3LSB.Gab]

did you install the gear position sensor on your car?

I just changed the clutch switch. Not sure about the gear position sensor if it was installed with the manual swap or not. It is a zcp also.

[ejendow]

I just changed the clutch switch. Not sure about the gear position sensor if it was installed with the manual swap or not. It is a zcp also.

I would check to see if you have a GPS installed and if not, reference THIS thread to see if this line of code was changed.

[M3fanatic580]

I replaced the clutch switch with the new black one that replaces the NLA brown one (PN 61319122700 - written 314 on it). The car idles better and no longer stall at stop, but it is not perfect. Maybe i'm too used to newer bmws now ^^. The one that was installed had 180804 written on it.

What do you mean by "it is not perfect"? What issue are you still having?

[nahvkolaj]

I’m gonna resurrect this a bit to keep the clutch switch conversation going. Nearing the end of my manual conversion, and I can’t get the starter to engage. Here’s what I have:

• Black “700” switch that Bimmerworld got from Germany. They called me on the phone and let me know they have difficulty sourcing the right switch due to P/N and manufacturing churn over last several years.
• AMS wiring harness kit. Installed according to their instructions, everything seemed to go fine
• Gear/neutral switch installed in transmission (the one with the pigtail)
• DME flashed to stock manual binary with bytes at 0x4028, 0x67e0, and 0x35da set per the “SMG to 6MT Conversion” thread
• Re-coded manual defaults to AKMB, ALSZ, EWS, DCT

After all that, I tested what I could before trying cranking:

• Reverse functions work: rear mirror dip, reverse lights, and PDC
• I am seeing a discrete change (can’t remember the name of it) in INPA when I go from Neutral to any gear
• Clutch switch appears to register digital signal in INPA.

I did try coding the EWS to not require the clutch in (PARK/NEUTRAL_EINGANG=nicht_aktiv) and I got engine crank, but this of course removes clutch disengage required to start. I would prefer to have everything working as it should.

I’m a bit stumped on where to go from here. It must be somewhere in the switch implementation. I might back probe the clutch switch to verify voltages are as expected, then beyond that all I can think is to pull apart the EWS and DME connectors to make sure I got everything in the right place. Pics attached of the switch and how the transmission sensors are hooked up.

[terra]

That would suggest the wiring between the clutch switch and EWS is incorrect. Even the non-M switch would work fine for EWS interlock purposes.

[George Hill]

If you have a GPS and a 700 clutch switch everything in your car should be wired AND coded like a stock MT car, nothing custom.

Pin #1 is ground
Pin #3 is power
Pin #4 of the clutch switch goes to pin #8 of the EWS. IF you do that then it will crank even if still coded as an SMG.