Cal switch scramble button
Posted: Mon May 23, 2022 5:01 pm
So … I have a s6+ pnp in my newage Impreza, I currently run and use the Syvecs rotary calibration switch, utilising 6 switch positions at present, for various table swaps etc.
What I’m wanting to do is to add a scramble button on the steering wheel to jump straight to a preset calibration, eg. Current cal (on rotary switch) to cal 6 for full boost.
Now I have used all of my inputs in the ecu so the only things I can see that are spare so to speak to add a cal switch override input are the rear lambda input that’s currently unused an12 I believe and also the a/c switch request an11 I believe. I tried to cut and wire into the a/c switch request using pin 6 on connector b134 of the Impreza loom into the ecu, now I can get this to work perfectly using a 12v input through a momentary switch but when I program the ecu, because the a/c switch in the pin assignments isn’t assigned to the an11, it becomes out of sync. Is there a solution here or something I’m missing that’s really obvious, or perhaps another way around this utilising a resistor stack inline through a momentary switch to match the resistance cal 6 has on the rotary switch to do the same job whilst not requiring the use of an input so to speak?
For reference, I run the rotary cal switch through a two wire setup using the pull up in the ecu on the 5v reference feed.
Many Thanks in advance
What I’m wanting to do is to add a scramble button on the steering wheel to jump straight to a preset calibration, eg. Current cal (on rotary switch) to cal 6 for full boost.
Now I have used all of my inputs in the ecu so the only things I can see that are spare so to speak to add a cal switch override input are the rear lambda input that’s currently unused an12 I believe and also the a/c switch request an11 I believe. I tried to cut and wire into the a/c switch request using pin 6 on connector b134 of the Impreza loom into the ecu, now I can get this to work perfectly using a 12v input through a momentary switch but when I program the ecu, because the a/c switch in the pin assignments isn’t assigned to the an11, it becomes out of sync. Is there a solution here or something I’m missing that’s really obvious, or perhaps another way around this utilising a resistor stack inline through a momentary switch to match the resistance cal 6 has on the rotary switch to do the same job whilst not requiring the use of an input so to speak?
For reference, I run the rotary cal switch through a two wire setup using the pull up in the ecu on the 5v reference feed.
Many Thanks in advance