Acceration sensor has 5v on circuit but you think it's sensor itself? That's what was thinking because it underneath car so I unplugged it to see if 5V reference would improve on low side pressure sensor circuit but it made difference, still 1.2v on plug pin.jimmy57 wrote: ↑Mon Jul 24, 2017 9:45 pm OK, I'm not paying attention. I reread the entire thing with care and see the 2004 XC70 isn't the subject here.
98 XC70 has a secondary air system solenoid on shroud brow and uses no MAP sensor. The Baro sensor is light violet and is on a bracket on the RH hood latch. It also uses an acceleration sensor down on subframe below a/c compressor. The accel sensor is the better candidate for assing with the Vref.
I pinned ground to 12v and it's good. So it's power source to the 5v reference wire on the high side pressure sensor circuit right?