AIT relocation - Bias resistor values - HKS SC - ECUTEK - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Trap63 · 04-02-2019, 02:46 AM

Hi guys, I wish to relocate AIT from stock intake for a better evalution of temperature (pressure side) and a better timing management when idle or low speed.
I saw that Fensport manage a poor sensor "VE375083 Cambiare" and I prefer AEM 30-2014, more reliable and faster

https://www.aemelectronics.com/produ...ure-ait-sensor

30-2014: Air Temp Sensor with 1/8" NPT Male Thread, High Performance DTM-Style Connector, Aluminum Bung, Connector & Pins.

The big issue is that for the sensor sold by Fensport is known the right scaling to set in EcuTek table.
I asked for the AEM 30-2014 to Ecutek but they haven't the right Bias resistor value.
The answer was: "
Hi Gian,

I'm not entirely sure on what the Bias resistor the BRZ ECU uses but I do know the older Subarus used a 1000ohm Bias so I would suggest trying this scaling initially. "

These are specs of 30-2014

This is the relocation

Is there anyone who can confirm me the 1000Ohm value? or where to find this value?

Hags86 · 04-02-2019, 04:39 AM

Are you using the OEM wiring harness or wiring direct into the ECU?

Hags86 · 04-02-2019, 04:42 AM

Scratch that. Saw your photo of the wiring from the MAF sensor. Makes sense.

I'd be willing to bet its 1kOhm. Turn it on with the engine at room temp and that is a good sanity check.

But to know for sure wire in a 1k resistor rather than the sensor and measure the voltage. Assuming it's a 5V supply you'll see 2.5V or be able to figure it out if it isn't. If you get stuck I can look through the wiring diagram and help you work out what the ECU is doing.

Once you know you can set the ecutek table to suit any sensor you want.

Trap63 · 04-02-2019, 04:43 AM

I would wire to stock wiring, the first two wires you see as Fensport does.

Inviato dal mio SM-G960F utilizzando Tapatalk

Hags86 · 04-02-2019, 05:19 AM

Do you have a multimeter handy? I can walk you through the steps to check if you like.

Trap63 · 04-02-2019, 07:14 AM

Quote:

Originally Posted by Hags86

Do you have a multimeter handy? I can walk you through the steps to check if you like.

that's fine! as soon as I will receive from CA I'll do this check.

04-02-2019, 02:46 AM	#1
Trap63 Senior Member Join Date: Apr 2013 Drives: Brz WRB - Europe LHD Location: TURIN - Piedmont - ITALY Posts: 921 Thanks: 1,163 Thanked 834 Times in 288 Posts Mentioned: 40 Post(s) Tagged: 1 Thread(s)	AIT relocation - Bias resistor values - HKS SC - ECUTEK Hi guys, I wish to relocate AIT from stock intake for a better evalution of temperature (pressure side) and a better timing management when idle or low speed. I saw that Fensport manage a poor sensor "VE375083 Cambiare" and I prefer AEM 30-2014, more reliable and faster https://www.aemelectronics.com/produ...ure-ait-sensor 30-2014: Air Temp Sensor with 1/8" NPT Male Thread, High Performance DTM-Style Connector, Aluminum Bung, Connector & Pins. The big issue is that for the sensor sold by Fensport is known the right scaling to set in EcuTek table. I asked for the AEM 30-2014 to Ecutek but they haven't the right Bias resistor value. The answer was: " Hi Gian, I'm not entirely sure on what the Bias resistor the BRZ ECU uses but I do know the older Subarus used a 1000ohm Bias so I would suggest trying this scaling initially. " These are specs of 30-2014 This is the relocation Is there anyone who can confirm me the 1000Ohm value? or where to find this value? __________________

04-02-2019, 04:39 AM	#2
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Are you using the OEM wiring harness or wiring direct into the ECU? __________________ 2013 Toyota 86: 275rwkW Coyoda Water-to-air Intercooled Turbo with GTX2863. CP Carillo Rods and Pistons. Motec M150 ECU. Motec C125 Dash. Holinger SG 6 Speed Sequential Gearbox. OS Giken LSD. MCA Reds Coilover. AP Racing Essex Sprint Front Brakes. PWR Radiator and Intercooler heat exchanger.

04-02-2019, 04:42 AM	#3
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Scratch that. Saw your photo of the wiring from the MAF sensor. Makes sense. I'd be willing to bet its 1kOhm. Turn it on with the engine at room temp and that is a good sanity check. But to know for sure wire in a 1k resistor rather than the sensor and measure the voltage. Assuming it's a 5V supply you'll see 2.5V or be able to figure it out if it isn't. If you get stuck I can look through the wiring diagram and help you work out what the ECU is doing. Once you know you can set the ecutek table to suit any sensor you want. __________________ 2013 Toyota 86: 275rwkW Coyoda Water-to-air Intercooled Turbo with GTX2863. CP Carillo Rods and Pistons. Motec M150 ECU. Motec C125 Dash. Holinger SG 6 Speed Sequential Gearbox. OS Giken LSD. MCA Reds Coilover. AP Racing Essex Sprint Front Brakes. PWR Radiator and Intercooler heat exchanger.

04-02-2019, 04:43 AM	#4
Trap63 Senior Member Join Date: Apr 2013 Drives: Brz WRB - Europe LHD Location: TURIN - Piedmont - ITALY Posts: 921 Thanks: 1,163 Thanked 834 Times in 288 Posts Mentioned: 40 Post(s) Tagged: 1 Thread(s)	I would wire to stock wiring, the first two wires you see as Fensport does. Inviato dal mio SM-G960F utilizzando Tapatalk __________________

04-02-2019, 05:19 AM	#5
Hags86 Senior Member Join Date: Mar 2013 Drives: Toyota GTS 86 Location: Melbourne Australia Posts: 243 Thanks: 21 Thanked 118 Times in 65 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Do you have a multimeter handy? I can walk you through the steps to check if you like. __________________ 2013 Toyota 86: 275rwkW Coyoda Water-to-air Intercooled Turbo with GTX2863. CP Carillo Rods and Pistons. Motec M150 ECU. Motec C125 Dash. Holinger SG 6 Speed Sequential Gearbox. OS Giken LSD. MCA Reds Coilover. AP Racing Essex Sprint Front Brakes. PWR Radiator and Intercooler heat exchanger.

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