temp sensor resistance
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Elder User
Joined: Feb 2003
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From: Winnipeg Canada
temp sensor resistance
What should the temp sensor resistance read for a 97 Explorer 4.0 OHV? Does ohms=temperature?
I'm getting exactly 50 degress difference between infrared thermometer and multimeter reading. 120 ohms vs 170 degrees.
Truck has 180k, assuming temp sensor has never been replaced. I couldnt find any info about resistance range for temp sensor in my Haynes manual. Also, this is for the gauge sensor, not the ECU.
I'm getting exactly 50 degress difference between infrared thermometer and multimeter reading. 120 ohms vs 170 degrees.
Truck has 180k, assuming temp sensor has never been replaced. I couldnt find any info about resistance range for temp sensor in my Haynes manual. Also, this is for the gauge sensor, not the ECU.
Postmaster
Joined: Jan 2003
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From: Durham, NC
Originally Posted by joners
Anyone have specs on what the resistance should read?
Elder User
Joined: Aug 2001
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From: South Texas
courtesy of http://www.carsoft.ru/autorepair/gtest.pdf (table on page 38)
ECT and IAT sensor readings (this applies to 95 Explorer, but should serve as a good general guide)
Temp deg F (deg C) Volts Resistance (ohms)
50 (10) 3.51 58,750
68 (20) 3.07 27,300
86 (30) 2.60 24,270
104 (40) 2.13 16,150
122 (50) 1.70 10,970
140 (60) 1.33 7,700
158 (70) 1.33 7,700 (one of these 2 is wrong)
176 (80) 0.78 3840
194 (90) 0.60 2800
212 (100) 0.46 2070
Dialtone
edit (post re-aligns the tablular format so insert spacing as appropriate)
edit 2 this does NOT apply to the gague sensor
ECT and IAT sensor readings (this applies to 95 Explorer, but should serve as a good general guide)
Temp deg F (deg C) Volts Resistance (ohms)
50 (10) 3.51 58,750
68 (20) 3.07 27,300
86 (30) 2.60 24,270
104 (40) 2.13 16,150
122 (50) 1.70 10,970
140 (60) 1.33 7,700
158 (70) 1.33 7,700 (one of these 2 is wrong)
176 (80) 0.78 3840
194 (90) 0.60 2800
212 (100) 0.46 2070
Dialtone
edit (post re-aligns the tablular format so insert spacing as appropriate)
edit 2 this does NOT apply to the gague sensor
Last edited by Dialtone; Apr 2, 2006 at 02:33 PM.
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