Wiring in IAT for SD - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mrk1 · 05-14-2014, 11:08 AM

Has anyone installed an aftermarket air temp sensor for speed density. I am trying to find a diagram that labels the wires to MAF so I know which to splice into.

Sportsguy83 · 05-14-2014, 11:13 AM

Quote:

Originally Posted by mrk1

Has anyone installed an aftermarket air temp sensor for speed density. I am trying to find a diagram that labels the wires to MAF so I know which to splice into.

Electrical Wiring diagram.

http://www.ft86club.com/forums/showthread.php?p=1166113

Why not use your stock MAF for SD IAT?

mrk1 · 05-14-2014, 11:20 AM

Thats what I was looking at, can someone smarter then me decode the labels. I know +B is power.

xjohnx · 05-14-2014, 12:32 PM

Quote:

Originally Posted by mrk1

Has anyone installed an aftermarket air temp sensor for speed density. I am trying to find a diagram that labels the wires to MAF so I know which to splice into.

not sure how much this will help since they're not color coded, but here's a photo of fa20club's external IAT harness for the maf sensor. The two wires on the left are the IAT wires. the right 3 are MAF wires.

mrk1 · 05-14-2014, 03:42 PM

Quote:

Originally Posted by xjohnx

not sure how much this will help since they're not color coded, but here's a photo of fa20club's external IAT harness for the maf sensor. The two wires on the left are the IAT wires. the right 3 are MAF wires.

so does that end plug into the maf connector on the stock harness?

xjohnx · 05-14-2014, 03:47 PM

Quote:

Originally Posted by mrk1

so does that end plug into the maf connector on the stock harness?

Yep, then one end coming off of it goes to the stock maf sensor, the other end goes to your IAT sensor.

mrk1 · 05-14-2014, 03:57 PM

ok cool I think I can reverse think that out, awesome

blown · 01-13-2015, 12:06 PM

figured out what e2 and THA mean?

blown · 01-17-2015, 02:02 PM

bump

mrk1 · 01-17-2015, 02:21 PM

I was never able to make this work

Kotu100 · 01-17-2015, 10:35 PM

THA is your air intake temp
E2 is sensor ground
B+ 12v power
E2G and VG must be the maf signals.

Kodename47 · 01-18-2015, 05:32 AM

I have done this to mine so it's possible, however I haven't had my car recently to be able to help. From memory you only need two wires and it doesn't matter on polarity. I pretty much just used the picture from above and I had the same connector in my hand.

I might have access to my car later so I'll see if I can get a photo for you.

Nawar · 04-14-2023, 07:51 AM

Quote:

Originally Posted by Kodename47

I have done this to mine so it's possible, however I haven't had my car recently to be able to help. From memory you only need two wires and it doesn't matter on polarity. I pretty much just used the picture from above and I had the same connector in my hand.

I might have access to my car later so I'll see if I can get a photo for you.

Hey man its been a while, hope you see this.
Im confused to which wire should i splice into?

are they the Green and Red?

tomm.brz · 04-14-2023, 08:15 AM

Quote:

Originally Posted by Nawar

Hey man its been a while, hope you see this.
Im confused to which wire should i splice into?

are they the Green and Red?

No it s the green and the one right next to it
Green is pin1, so you cut green cable and the one next to it (pin2) and connect them to the external IAT
the sensor usually has no polarity

05-14-2014, 11:08 AM	#1
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Wiring in IAT for SD Has anyone installed an aftermarket air temp sensor for speed density. I am trying to find a diagram that labels the wires to MAF so I know which to splice into. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

05-14-2014, 11:20 AM	#3
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Thats what I was looking at, can someone smarter then me decode the labels. I know +B is power. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

05-14-2014, 03:57 PM	#7
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	ok cool I think I can reverse think that out, awesome __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

01-17-2015, 02:21 PM	#10
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	I was never able to make this work __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

01-18-2015, 05:32 AM	#12
Kodename47 Senior Member Join Date: Oct 2012 Drives: UK GT86 Location: UK Posts: 3,040 Thanks: 185 Thanked 1,629 Times in 1,112 Posts Mentioned: 155 Post(s) Tagged: 1 Thread(s)	I have done this to mine so it's possible, however I haven't had my car recently to be able to help. From memory you only need two wires and it doesn't matter on polarity. I pretty much just used the picture from above and I had the same connector in my hand. I might have access to my car later so I'll see if I can get a photo for you. __________________ .: Stealth 86 :. Abbey Motorsport/K47 Tuned Sprintex 210 Supercharger Kodename 47 DJ: Soundcloud / Instagram / Facebook

01-13-2015, 12:06 PM	#8
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	figured out what e2 and THA mean?

01-17-2015, 02:02 PM	#9
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	bump

01-17-2015, 10:35 PM	#11
Kotu100 Senior Member Join Date: Mar 2014 Drives: Supra, 2014 BRZ Location: Stoughton, MA Posts: 327 Thanks: 241 Thanked 192 Times in 82 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	THA is your air intake temp E2 is sensor ground B+ 12v power E2G and VG must be the maf signals.

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