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Old 11-05-2012, 04:37 PM   #26
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Join Date: Nov 2011
Location: USA
Posts: 191
My Ride: 01 330i
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.
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