Tachometer Signal Source

Solid67 · 10-12-2019, 04:53 PM

My mechanic is trying to wire the AIC1 controller and the tachometer signal needs to be connected to pin 9 of the OBDII port according to Fuel-It

"For the rpm, that is typically pin 9 on the OBDII port. If you don’t want to use the OBDII port you’d have to find the corresponding pin at the DME in the engine bay."

Does anyone know what the corresponding pin in the DME is? I don't want to use pin 9 of the OBDII port because of my BM3 wifi agent which is always plugged in.

Fuel-It! · 10-13-2019, 12:23 PM

You can use a posi-tap on the wire going in to the OBDII plug itself under the dash.

ecarver2 · 10-18-2019, 08:38 AM

Quote:

Originally Posted by Fuel-It!

You can use a posi-tap on the wire going in to the OBDII plug itself under the dash.

Do you have a pinout diagram to identify which plug it is?

10-12-2019, 04:53 PM	#1
Solid67 Lieutenant 187 Rep 458 Posts Drives: 2019 M240i xDrive MP Edition Join Date: Mar 2019 Location: Fairfax, VA iTrader: (0)	Tachometer Signal Source - CPI Kit My mechanic is trying to wire the AIC1 controller and the tachometer signal needs to be connected to pin 9 of the OBDII port according to Fuel-It "For the rpm, that is typically pin 9 on the OBDII port. If you don’t want to use the OBDII port you’d have to find the corresponding pin at the DME in the engine bay." Does anyone know what the corresponding pin in the DME is? I don't want to use pin 9 of the OBDII port because of my BM3 wifi agent which is always plugged in. __________________ 2019 M240i M Performance Edition / xDrive / ZF8 / BM3 Stg 2+ E30 / xHP Stg 3 / Dorch Stg 2 HPFP / Evolution Racewerks Catless Downpipe / MPPSK Exhaust / FTP Drop in Filter / FTP Intake Pipe / FTP Chargepipe / NGK 94201 Spark Plugs .022 / Michelin PS4S - 225/35/19 + 245/30/19
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10-13-2019, 12:23 PM	#2
Fuel-It! Banned 550 Rep 949 Posts Drives: M4, M5, M2C, X4M, 440i, etc... Join Date: Mar 2019 Location: Phoenix AZ iTrader: (0)	You can use a posi-tap on the wire going in to the OBDII plug itself under the dash.
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