Ok so heres the deal. Whenever I hit boost theres this high pitch tone, similar to a warning tone that start emitting somewhere in the driver side dash area. It seems to change its pitch at differing boost levels which points to it being tied into the PIM sensor off the map sensor which feeds the boost signal to the factory boost gauge via a variable 5v signal. It is not rpm or speed dependent either. purely boost depending as i can willingly change the pitch by laying off the gas pedal and on it again.
I have not yet tried disconnecting the PIM signal but may do that today before work just to double check.
At first I thought it may have been some kind of silly after market system which just alerted the driver of boost... perhaps a warning tone which was set all the way down to 0 PSI in order to prevent on of the two previous owners from going fast/speeding? lol
However last night...
... I was going over the st165 wiring diagram (for the 100th time) and I took special notice to something wired into the gauge cluster after the factory boost gauge. Its a square box with TURBO INDICATOR written on it Ive notices this before but didnt think much of it. So NOT being a newbie i searched for it "turbo indicator" and all i came up with was a post listing the differences between jdm and usdm st165 ecu's (one difference is that the JDM ecu has a turbo indicator LAMP TIL which is shown in an ecu pin out diagram to be on the pin out right next to the SPD pin out on the 24 pin plug AND this is not shown on the EWD for the usdm diagram ive been referencing).
My question is what the heck is that TURBO INDICATOR in the gauge cluster, which wired in after the boost gauge? Could this be where my high pitch variable tone is coming from?
Im hoping someone has an answer other wise i have to pull out my vac/pres pump and trick it into thinking the car is boosting as i disassemble the dash areas to track down this pesky electronic tone.
Super thanks in advance
I have not yet tried disconnecting the PIM signal but may do that today before work just to double check.
At first I thought it may have been some kind of silly after market system which just alerted the driver of boost... perhaps a warning tone which was set all the way down to 0 PSI in order to prevent on of the two previous owners from going fast/speeding? lol
However last night...
... I was going over the st165 wiring diagram (for the 100th time) and I took special notice to something wired into the gauge cluster after the factory boost gauge. Its a square box with TURBO INDICATOR written on it Ive notices this before but didnt think much of it. So NOT being a newbie i searched for it "turbo indicator" and all i came up with was a post listing the differences between jdm and usdm st165 ecu's (one difference is that the JDM ecu has a turbo indicator LAMP TIL which is shown in an ecu pin out diagram to be on the pin out right next to the SPD pin out on the 24 pin plug AND this is not shown on the EWD for the usdm diagram ive been referencing).
My question is what the heck is that TURBO INDICATOR in the gauge cluster, which wired in after the boost gauge? Could this be where my high pitch variable tone is coming from?
Im hoping someone has an answer other wise i have to pull out my vac/pres pump and trick it into thinking the car is boosting as i disassemble the dash areas to track down this pesky electronic tone.
Super thanks in advance