Resistance values IAT and coolant temp sensor

Magnum Engine Swaps

  1. Will_Swe

    Will_Swe Member

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    Hi everyone!

    I been searching for resistance values vs temperature for magnum coolant sensor and IAT.
    I need it for the megasquirt in my Valiant.
    Been searching, but not found good information..

    //William, Sweden.
     
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    • rbkt65

      rbkt65 FABO Gold Member FABO Gold Member

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      factory drivability manual will tell you or someone that works at a shop that can print out the tests for either code.
       
    • Will_Swe

      Will_Swe Member

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      Yeah, got like 4 hours to closest mopar workshop... :-/
      And the manuals are very expensive and delivery time is looong from the states as is today...
       
    • pishta

      pishta I know I'm right....

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      From a '90 manual, IDK if they changed ...

      Coolant Temp Sensor Response Chart (same as IAT values)
      110 degs = 4.20 volts
      120 = 4.00
      130 = 3.77
      140 = 3.60
      150 = 3.40
      160 = 3.20
      170 = 3.02
      180 = 2.80
      190 = 2.60
      200 = 2.40
      210 = 2.20
      220 = 2.00
      230 = 1.80
      240 = 1.62
      250 = 1.45
      Temperature to Resistance
      32 degs = 30 - 35 K ohms
      77 degs = 9 - 11 K ohms
      212 degs = 640 - 720 ohms

      some other Mopar related stuff
      Map Sensor Response Chart Turbocharged
      Pressure in Inches/HG to Voltage
      24.01HG/.43V
      18.11HG/.93V
      12.20HG/1.42V
      6.30HG/1.92V
      .39HG/2.41V
      2.71PSIG/2.91V
      5.61PSIG/3.41V
      8.51PSIG/3.90V
      11.31PSIG/4.40V
      14.31PSIG/4.90V
      TPS Response Chart
      Throttle Position in Degrees to Increase of Minimum TPS Volts
      Closed Throttle
      10 DEGS/0.00V
      20 DEGS/0.38V
      30 DEGS/0.75V
      Half Throttle
      45 DEGS/1.31V
      58 DEGS/1.80V (1)
      75 DEGS/2.43V (2)
      Wide Open Throttle
      90 DEGS/3.00V
       
    • rbkt65

      rbkt65 FABO Gold Member FABO Gold Member

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      have a 93 fsm and will try to download info for you.
       
    • rbkt65

      rbkt65 FABO Gold Member FABO Gold Member

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      here is info from my 93 fsm. 1 st pic is chart of values, 2nd and 3rd pic should be how to test cts. pics in the next block are of charge temp/iat, which appears to mirror cts. hope this helps. rick w. 20210326_092545.jpg 20210326_092615.jpg 20210326_092621.jpg
       
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      • rbkt65

        rbkt65 FABO Gold Member FABO Gold Member

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        20210326_092626.jpg 20210326_092631.jpg
         
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        • Will_Swe

          Will_Swe Member

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          Thank you!! This is exactly what I been searching for!
           
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