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Problem with GM IAT and DSMLink v3lite


jmorri15
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Galant VR-4 org Post #: 1245015 posted 12/31/18 06:21 PM     Remind Me!  Send Private Message   Edit Post   
So I have been trying to figure out why my IAT sensor is only showing -40 degrees, it has been a problem since I started going through everything to get my car back onto the road. I have narrowed it down to what I believe is something in my ECU. I replaced the old HKS IAT with a brand new GM IAT sensor a week ago and just applied 12v power to the car after 6 years Saturday. The wiring under the hood is pretty rough so I have been cutting and replacing connectors that are frayed and baked. The old IAT sensor looks like it was shorted and broke almost as soon as I moved the cable.

Here is what I have tested so far

I tested the resistance of the IAT sensor and I am getting up and down from 1.3-2.8 ohms when running a hairdryer across it. I have checked the wiring and I good continuity and have no resistance from the sensor to the ECU. When I look at the wiring diagram it seems to say that I should see 5v across the sensor when it is plugged in, but when I probe it I am seeing no voltage.


Any thoughts you might have would be awesome.



2016 Mazda6 GT
2014 Chevy Volt (Totaled)
2013 Buick Regal GS (Sold)
2003 Nissan Sentra SE-R Spec V (Sold)
1994 3000GT SL (Sold)
1995 3000GT SL (Sold)
1992 GVR4 424/1k
1998 Ford Escort (Sold)
1996 Ford F-150

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