S15 SR20DET IAT Help

[David Reid]

Hello I am using a G4+ but really struggling to get the IAT to read sensibly (currently reading -30) actual is approx 0-5 deg.C (no fault recorded)

I am using the motorola sensor below

https://www.efisolutions.com.au/air-intake-temperature-sensor-motorsport-with-conn

It is wired inplace of the MAF using the MAF ground, pin 16 (An Volt 4) & pin 17 (MAF sensor ground)

Jumper 8 is fitted to the board 

An Volt 4 is then set to IAT-Ext Pullup and I have entered the cal in the link above into cal table 1 and set it to use it.

 

I then noticed that the sensor looks identical to the the one link sell, however it is only possible to select the cal file for this (link NCT1-8) against a An Temp rather than An Volt input (I dont understand why).

Does this mean I can't use the AFM wiring with this sensor and need to wire into an An Temp input

Any help would be appreciated Thankyou

 

 

 

 

 

 

 

[Adamw]

What ecu do you have?

Can you attach your tune too.

Edit:  Sorry I just noticed "S15" in the title, I missed that originally.  

Correct in that the AN Volt inputs dont allow the pre-defined temp calibrations - you always need to use a cal table.  Your wiring sounds correct and shouldnt need anything further.  Attach your map and that may give me some clues.

[David Reid]

Thankyou for the feedback, knowing it was now wired correctly I investigated the tune. As the table break points exceeded the cal data I had, when I entered it I simply extended by copying the same date to the next cell i.e same values in -30 as -40. Link obviously doesn't like this as just increasing the -40 resistance value by one made the table read correctly and IAT now functions as expected. 

Thankyou for your help, next to fire it up ;@)