Like most sensors, the IAT uses a 5volt reference. Most car manufactures moved the IAT sensor off the intake manifold because they tend to heatsoak. The thing is your need to find a IAT sensor that has the same resistance curve as the IAT sensor inside the MAF. I dont know if the MS43 IAT has the same curve as the IAT found inside the MAF of the MS45's. Most ecus share the same reference voltage line with a lot of other sensors that use 5volt reference. Im thinking if anything you can pull the voltage from the TPS.
Last edited by sunnyjay; 11-05-2012 at 04:41 PM.