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Default OBD wiring schematic - 01-31-2020, 06:29 PM

Can anyone share the wiring schematic for an F series N55 OBD port?
I am trying to wire up ShiftP2 shift light
Shift-P2 - Ecliptech


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Default 01-31-2020, 09:37 PM

Looking for the RPM pin, but now its looking like I should get it from the cluster: Instrument cluster

The diagram on this link looks like the RPM is in the (KOMBI) so maybe it is not as easy as tapping a wire into an "RPM signal". Does anyone or has anyone ever tapped into the coil wires?


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Default 02-03-2020, 10:50 AM

We get RPM from the third unused pin on the black OBD2 cable.


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It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 02-03-2020, 11:41 AM

Quote:
Originally Posted by Payam @ BMS
We get RPM from the third unused pin on the black OBD2 cable.

BMW OBD-II diagnostic interface pinout diagram @ pinoutguide.com

This diagram shows 2 & 3 pins not being used. Is this correct? and if so, I could tap that 3rd pin to readout an RPM signal?

That link above is from a diagram showing a 2001 535 so I just wanted to be clear.


However, this is a diagram from an e90 that shows pin 3 as a vendor option.



Thanks


2011 F10 535i | D Shoup Flash | PS2 | GFB DV+ | Wagner FMIC | Helix Overdrive | Sprint Booster | CDV Mod | Koni Yellows | Eibach Sports | M5 Sways | Spec 2 Clutch | SMF | UUC SSK | Custom Inlet | Custom Dynomax Exhaust

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Default 02-03-2020, 12:24 PM

Quote:
Originally Posted by Whateva
BMW OBD-II diagnostic interface pinout diagram @ pinoutguide.com

This diagram shows 2 & 3 pins not being used. Is this correct? and if so, I could tap that 3rd pin to readout an RPM signal?

That link above is from a diagram showing a 2001 535 so I just wanted to be clear.


However, this is a diagram from an e90 that shows pin 3 as a vendor option.



Thanks
Pin 3 on the OBD2 molex end.

You'll see a pin that's unused:
https://lh3.googleusercontent.com/pr...IU7NHQnKIBFkmt


Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 02-03-2020, 01:44 PM

You have to excuse my understanding of the vernacular Molex. If the Molex is the pin socket interconnection and its relation to the ODB cable; couldn't I just dissect my USB to OBD and find the unused pin?

If that is the case, then how would I know where the unused pin on the USB side was supposed pin to on the OBD side?

Thanks for all the help


are you referring to this cable? https://burgertuning.com/products/jb4-obdii-replacement

if this is the unused connection then I suppose I could tap directly into that line from the vehicle.


2011 F10 535i | D Shoup Flash | PS2 | GFB DV+ | Wagner FMIC | Helix Overdrive | Sprint Booster | CDV Mod | Koni Yellows | Eibach Sports | M5 Sways | Spec 2 Clutch | SMF | UUC SSK | Custom Inlet | Custom Dynomax Exhaust

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Default 02-03-2020, 02:07 PM

Quote:
Originally Posted by Whateva
You have to excuse my understanding of the vernacular Molex. If the Molex is the pin socket interconnection and its relation to the ODB cable; couldn't I just dissect my USB to OBD and find the unused pin?

If that is the case, then how would I know where the unused pin on the USB side was supposed pin to on the OBD side?

Thanks for all the help


are you referring to this cable? https://burgertuning.com/products/jb4-obdii-replacement

if this is the unused connection then I suppose I could tap directly into that line from the vehicle.
Yes that cable.

The lower pin that is unused that I marked with the red arrow is RPM.
The green and brown wires go to were I marked.
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Burger Motorsports
Home of the Worlds fastest N20s, N54s, N55s, S55s, N63s, and S63s!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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Default 02-03-2020, 02:25 PM

Excellent, Thank you, Payam!


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