Coolant temperature sensor resistance values

To test the sensor, you can remove the electrical connector and check the resistance value of the sensor and compare it to specs. If it's way off, replace it. But if it's close, you really need to perform a voltage test, since it's far more accurate than an ohm test. To test the voltage, you'll need to either back probe the electrical. The resistance of the temperature sensor changes depending on coolant temperature. As the temperature increases, the resistance is reduced, which reduces the voltage at the sensor. The control unit evaluates these voltage values, since they are directly related to the coolant temperature (low temperatures result in high voltage values at the. Ford engine coolant temperature sensor (ECT) resistance chart. BrooklynBay; October 16, 2006; ... coolant ect engine ford resistance sensor temperature This chart is for troubleshooting the ECT, and ACT sensor at different temperature ranges. Click to expand... Reactions: arkmountaineer. A. A arkmountaineer; January 3, 2020; 5.00 star(s) thank. The water temp sensor is basically a NTC Thermistor encased inside the metal housing that bolts into your engine where there is coolant present (eg. thermostat housing, etc). An NTC thermistor is a device that provides a variable resistance based upon the. Gently pull it up to remove it from the engine. Figure 1. Remove engine cover. Step 2 - Remove coolant temperature sensor The temperature sensor is in a tight area, behind the engine, closer to the passenger side. Here is a quick video on how to replace a temperature sensor on an Audi A6 with a 2.8L engine. The water temp sensor is basically a NTC Thermistor encased inside the metal housing that bolts into your engine where there is coolant present (eg. thermostat housing, etc). An NTC thermistor is a device that provides a variable resistance based upon the temperature of it's body.

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Since you said that the normal operating range was 0 - 10k ohms, I unplugged it from the wiring harness and checked it with an ohm meter when it was cold, then ran the engine to normal operating temperature. Value at nearly cold iron- 9k ohms Value at nearly normal operating temp- 352 ohms The sensor itself seems to be fine, so I've ruled that out. Since lower fuel economy often does indicate that the ECT has gone bad, replace it with a new one and observe your car's fuel economy. If it is still lower than normal, the source of this issue may be caused by another faulty component of engine. Standard Honda Civic ECT sensors run from about $20 to $40. Replacing it yourself is a simple task. With a lab scope a coolant temperature sensor is measured from an engine in a warming up stage. The signal from the sensor is shown and can be downloaded. ... If the temperature changes, the resistance and the signal voltage at the dividers output changes. ... Signal values may differ on different types of engine control units and coolant. SKU. 6U0-919-501/B. Reviews & Ratings. (1 Review) Temperature sensor for the coolant temperature gauge. This is a 4 pin 20mm switch and is black/yellow. Retaining clip and seal are not included but can be purchased separately: O-ring seal N90-316-802. Retaining clip 032-121-142.. Show Less. Anyway, here are the results for anyone in future that might need a rough reference for this style of coolant temp sensor--average of two sensors (with help from my freezer and microwave): Temp Degrees F. Ave resistance (ohms) 10----- 7370. 40----- 2275. 62----- 1205. Order METZGER 0905150 Sensor, coolant temperature with seal Our price: 8,28 € – a saving of 29% Buy today. The "typical" sender values are supposedly from the original G.M. specs. Look at the ... Welsh. You also need to look at your temperature gauge. There is a 90 ohm resistor on the back of it. Make sure it isn't burnt out. Also make sure that the silver terminal on the gauge has a good ground to the cluster. Tim Welsh. GM Temperature Sensor Chart. Many of us have had the Coolant Temp Sensor or the Temp Gauge Sensor fail on us, and when replacing it, found that the replacement sensor was also inaccurate. Here's a chart that gives the resistance values at a wide range of temperatures. It's best to have the sensor at ambient temperature instead of fresh off the.

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Very cool, the work you did with the engine fan. Basically all I wanted to do was test the sensor. Since you said that the normal operating range was 0 - 10k ohms, I unplugged it from the wiring harness and checked it with an ohm meter when it was cold, then ran the engine to normal operating temperature. Value at nearly cold iron- 9k ohms. Most commonly, temperature sensors are used to measure temperature in circuits which control a variety of equipment's. There are different types of temperature sensors used in the market today including resistance temperature detectors (RTDs), thermocouples, thermistors, infrared sensor , and semiconductor sensors. Test the coolant temperature sensor by detaching its harness connector and checking resistance across the sensor's terminals. The correct resistance varies with engine coolant temperature. A sensor with resistance not corresponding to the values given in the chart is faulty and should be replaced. Graph showing coolant temperature sensor. December 23rd, 2019 - P0125 Toyota Description The Engine Coolant Temperature sensor is used to monitor the temperature of the engine coolant The resistance of the sensor varies with the actual coolant temperature The Engine Control Module applies a voltage to the sensor and the varying resistance of the sensor causes the signal. I'm finishing up an M54 into an E36 swap and because I'm retaining the stock fan control I need a radiator outlet temp sensor signal for the DME. The E36 radiator has a threaded bung for the old coolant temp sensor that looks like an E46 ETS will thread right into. If the resistance values are the same then I can just use the E46 ETS.

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In the Helm manuals there is a table (pages 6-935, 6-1377 in my year's book F): degC degF Ohms. 150 302 47. 140 284 60. 130 266 77. 120 248 100. 110 230 132. 100 212 177. cn90 » Most Engine Coolant Sensor works by NTC principle: as temp increases, the resistance (measure in Ohm) decreased. For example, I measured the brand-new Volvo ECT and got these values-20C: 16,000 Ohms (16 kOhms) 0C: 7,300 Ohms; 20C: 2,600 Ohms; 80C: 300 Ohms.

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An engine coolant temperature sensor or ECT sensor is a variable resistor that uses resistance to change a 5-volt reference signal from the PCM. The sensor's signal changes according to the engine's coolant temperature. It's a vital component for maintaining an engine's normal operating temperature. Located in the coolant stream, usually, on or.

The resistance of the temperature sensor changes depending on coolant temperature. As the temperature increases, the resistance is reduced, which reduces the voltage at the sensor. The control unit evaluates these voltage values, since they are directly related to the coolant temperature (low temperatures result in high voltage values at the. The Resistance between the two prongs of the temp sensor was .690 K Ohms The Temp indicated by Ibeat was 28'C or 82.4F Which is what the temperature was outside today I then started the bike and recorded the Resistance when the fan came on. The Resistance between the two prongs was now .162 K Ohms. Water Temperature - Ohms Reading approximate temp to resistance chart from a Mercruiser service manual 210 à °F (100à °C): 185 160à °F (70à °C) : 450 ... I was thinking since Merc recently has put the yellow wire from the coolant sensor into the ICM, that the gray wire going into the ICM would sound the warning horn as well for. The Bentley manual says the specs are 2100 - 2900 ohms at 68 degrees and 270 - 400 at I think 176. I had a coolant temp sensor reading 1924 ohms at 80 degrees ambient, car sitting overnight, then at 232 when the engine was at normal temperature. Not sure if that was 176. Thinking it was bad I replaced it. Before I even installed the sensor I checked the resistance. Tchnical Question: Resistance values for Coolant Temperature Sensor. Jump to Latest Follow 1 - 17 of 17 Posts. R ... I need the resistance values across the range for the temperature sensor unit. If I remember correctly, there's a table in one of the electrical troubleshooting chart. I need the values from that chart: The temp/resistance figures. The coolant temperature sensor monitors coolant temperature and then displays the measurement to the vehicle’s occupants. The engine can be in danger of damage if it operates at too high of a temperature. The coolant temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and. 3. Drain the engine coolant.. 4. Disconnect the ECT sensor No.2 connector. 5. Remove the ECT sensor No.2.. 6. Place the ECT sensor No.2 in water with a thermometer, and heat the water gradually. 7. Measure the resistance between ECT sensor No.2 terminals A and B. If not as specified, replace the ECT sensor No.2.. Specification.

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The ECM grounds the coolant fan circuit when the coolant temperature sensor indicates the temperature is greater than 222° or when the A/C head pressure is greater than 232 psi and the vehicle speed is less than 35 or 40 mph (depending on application). When this circuit is grounded, the fan relay is energized and voltage is applied to the fan. Gently pull it up to remove it from the engine. Figure 1. Remove engine cover. Step 2 - Remove coolant temperature sensor The temperature sensor is in a tight area, behind the engine, closer to the passenger side. Here is a quick video on how to replace a temperature sensor on an Audi A6 with a 2.8L engine. The Coolant Temp Sensor is located right next to the dip stick and down below the oil fill cap. Its not sensing exact coolant heat temperature so its overheating then required level. 00 (ex GST) for International Customers. How to stop car hesitation DIY. 11 Posts. #7 · Jan 31, 2021. bmclaws said: It should read 74 ohms cold and 970 ohms hot. I know this is an old post but still want to help the next guy who comes here looking for 98 Mustang coolant temp sender ohms like I did and reads this bad info. The post was close just hot is 9.70 ohms, not 970. This directly from the EVTM from Ford shop. I change my temp sensor on Fiesta 06 plate. The resistance values were way above the values in Haynes. I tested my car with a variable resister and it matched the Haynes values. Where do I get the correct part from. I'm getting confused. Has anyone else had a similar problem. Cheers. This is slated as a direct replacement and physically looks just about the same. Upon measuring, room temp has a resistance of roughly 580ohms, 180F water has a resistance of around 180ohms. So, very different than the other OEM units I have, and much closer to what the SM says, but still not the same. It's still over 3x higher than what the SM. However, the normal engine temp should be in the range of 195 degrees to 220 degrees Fahrenheit. Though, most vehicles do not display the degrees of the coolant temp on the instrument cluster. They have markings that indicate low and high temperatures . In this type of reading on the instrument cluster, if the temp gauge needle is resting on or. The resistance was 2,953 Ohm when the engine was cold. It dropped to 248.5 Ohm after the engine had been fully warmed up; see the photo. This sensor is within specifications. Of course, the resistance specs vary depending on the car. The coolant temperature sensor is crucial to ensuring that the engine is operating at its optimal temperature. If the coolant sensor malfunctions in any way, it can cause a number of issues with your engine’s performance. A bad coolant temperature sensor can cause the car to stall and will damage Continue Reading. At 73 Deg F, the resistance I have is 318 ohms for both Motorcraft 270. I sold my old 170 I-6 long time ago and I don't know what temp sender it had so I don't know the resistance values. I just want to make sure that I get an decent coolant temp reading on my dash gauge with the the Motorcraft 270 sender. The condensed Resistance VS Temperature Tables on the following pages are provided to aid in the proper RTD element selection. Notice that the tables for the various platinum curves are for the standard 100 ohm @ 0°C sensor. To calculate the resistance of: 50 ohm, multiply the values by .5; 200 ohm, multiply the values by 2;. Poor Fuel Economy. Poor fuel economy is another symptom that indicates your coolant temperature sensor is malfunctioning. If the coolant temperature sensor malfunctions, it can transmit a false signal to the computer. And the response of the computer may unbalance the timing and fuel calculations. It is also common for a coolant temperature. 1. Fill a cup or small container with ice and water. Take a clean cup and fill it with about 6 fluid ounces (180 mL) of clean water and add few ice cubes to bring down the temperature. Wait a few minutes to allow the ice to chill down the water. [5] The cold water will serve as a reference measurement for your sensor. CITROËN/PEUGEOT 1920KP, 1920RJ. Type Sensor, coolant temperature. Function Sensor, coolant temperature. Weight 0.030 kg. Net weight 0.024 kg. VOLVO S80 II (124) 2.0 Drive- E Saloon Petrol 12/2014 12/2016 FWD 16 245 180. ... Compatibility: See compatible vehicles ... Value added tax number: GB 171358115; Returns policy. After receiving the item. The Resistance value you need would be between 2 pins on the actual sensor.. recheck the bgb for the "component inspection' for the water temp sensor. Measure yours with a good calibrated meter and compare to the specs. btw..2.45kOhms is. Enter your search keyword ... Advanced. Oct 15, 2008. #2. This is some very good info, especially the coolant sensor is a very interesting read with the step in the voltage. I think this is worth keeping as it shows the voltages one would expect to see when checking the sensor if you fuel consumption is up and you suspect the temp sensor. Youv'e had a barry with the cas link, i've. Both at 75*F, I am getting about a 250 OHM discrepancy (750 + 500 OHMS) between the sensors, and am using an IR thermometer held about 8" from the aluminum manifolds, aimed at the base of the sensors. Also, both brass sensor bases read "0" OHMS to an intake bolt, indicating a good ground. Sensor Calibration. If you need to recalibrate your temperature sensors, such as after loading firmware, here are the values to use for the stock sensors. The bias resistor is 2490 ohms. Use this chart for the CLT sensor. Temperature (degrees F) - Resistance (Ohms) 68 -.

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Fill the pan with normal room temperature water and heat it up on the stove to about 100 degrees or so. Put the pan on a different burner that’s not on, this will stabilize the water temp. Suspend the sensor into the water using your coat hanger rig and let it sit for a moment. Use a multimeter to determine the resistance of the sensor. I went over the whole fan circuit a billion times. I tested the voltage on a cold motor on the coolant temp sensor circuit: 3.3v (equivalent to about 55 or 60 degrees) With a 150ohm resistor: .45v (equivalent to well over 200 degrees, aka which would turn the fans on) At the relay, there is a coil part and a switch part. The resistance in the sensor changes depending on the temperature of the coolant. Depending on the resistance in the sensor, a voltage (signal) is transmitted to the Engine Control Module (ECM). At 0 °C, the voltage is approximately 4.0 V. At 100 °C the voltage is approximately 0.5 V. Low temperature results in high voltage (high resistance.

The condensed Resistance VS Temperature Tables on the following pages are provided to aid in the proper RTD element selection. Notice that the tables for the various platinum curves are for the standard 100 ohm @ 0°C sensor. To calculate the resistance of: 50 ohm, multiply the values by .5; 200 ohm, multiply the values by 2;. The coolant temperature sensor is crucial to ensuring that the engine is operating at its optimal temperature. If the coolant sensor malfunctions in any way, it can cause a number of issues with your engine’s performance. A bad coolant temperature sensor can cause the car to stall and will damage Continue Reading. . Also, both brass sensor bases read "0" OHMS to an intake bolt, indicating a good ground. When the temperature gauge reads @ 3/4, the IR thermometer aimed into the radiator and at the manifold where the gooseneck bolts on both read 180*F. Both the IR thermometer and my meter are Flukes, and the thermostat is a 160*F, which is working properly. Sensor Business Segment, M/S 93B (330) 373-3069 408 Dana Street Fax: (330) 373-4147 Warren, OH 44486 Unload Resistance-Temperature Characteristic Chart 1 10 100 1000 10000 100000 1000000 Temperature (°C) Sensor Resistance (Ω) Temperature Accuracy Chart-2.00-1.50-1.00-0.50 0.00 0.50 1.00 1.50 2.00-40 -25 -10 5 20 35 50 65 80 95 110 125 140.

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Test the coolant temperature sensor by detaching its harness connector and checking resistance across the sensor's terminals. The correct resistance varies with engine coolant temperature. A sensor with resistance not corresponding to the values given in the chart is faulty and should be replaced. Graph showing coolant temperature sensor. Test the coolant temperature sensor by detaching its harness connector and checking resistance across the sensor's terminals. The correct resistance varies with engine coolant temperature. A sensor with resistance not corresponding to the values given in the chart is faulty and should be replaced. Graph showing coolant temperature sensor. Tchnical Question: Resistance values for Coolant Temperature Sensor. Jump to Latest Follow 1 - 17 of 17 Posts. R ... I need the resistance values across the range for the temperature sensor unit. If I remember correctly, there's a table in one of the electrical troubleshooting chart. I need the values from that chart: The temp/resistance figures. Only show this user. I have a 93 Jeep YJ with an 01 Chevy Blazer Engine in it. It is a Vortec V6 Engine. It was idling rough and I pulled Codes and got the code for the Coolant Temp Sensor. I had the Temperature Gauge Spliced into the wire going back to the pcm when getting this code. When I unhook the Gauge Wire from the signal back to the pcm.

(3) The radiator fans are under control of Bosh-Motronic and the trigger value is hard-coded somewhere inside the firmware. (4) If you try to cheat the resistance value that being sent by temp sensor, you will also fool the fuei-management mixture logic (injection duration) - system will think engine is cooler or hotter than it is in reality. 10pcs 10k PVC NTC thermistor probes, prevent moisture + copper temperature sensor probe for dispenser : Amazon.sg: Automotive. Skip to main content.sg. Hello Select your address All. Hello, Sign in. Account & Lists Returns & Orders. Cart All. Search: Airflow S3 Sensor Example. pressure across a series of step sensor blades to measure air flow Here is an example of a DAG. Temperature VS Resistance Values (Approximate) Degrees C Degrees F Ohms 100 212 177 90 194 241 80 176 332 70 158 467 60 140 667 50 122 973 45 113 1188 40 104 1459 35 95 1802 30 86 2238 25 77 2796 20 68 3520 15 59 4450 10 50 5670 5 41 7280 0 32 9420 -5 23 12300 -10 14 16180 -15 5 21450 -20 -4 28680. You can confirm the correct sensor by verifying the resistance. put 1 lead on the pin in the plug of the sensor, and the other anywhere on the sensor body. resistance should be 1425 at 100*f (cold) and should decrease as it warms up. I verified this by holding the tip in a cup of hot water. worked like a charm. The sensor for the lean burn should read"continuity with a resistance less than 100 ohms" when measured below 60 degrees. When hot, the sensor should read no continuity. The coolant temp sensor should read between 500 and 1100 ohms when the motor is cold and the ambient temperature is less than 90 degrees.

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Temperature Sender: Room Temp (Sender Dependent) 300 – 1000 Ohms (•) Pressure Sender: Engine off (Sender Dependent) 10 Ohms (•), 240 Ohms (•) Title: ZÐ Ö ´e ÁA auöï½Æ t¤Nh BT¨ ¶õj4Li Ï | Õ¡-ãï * ý ¤±rG n3 º ¹r_Þ $¿õ±¯ 5® A ÚÎf4°¯R©ÞH^. You can confirm the correct sensor by verifying the resistance. put 1 lead on the pin in the plug of the sensor, and the other anywhere on the sensor body. resistance should be 1425 at 100*f (cold) and should decrease as it warms up. I verified this by holding the tip in a cup of hot water. worked like a charm.

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. Your numbers are consistently high that tells me the sensor is failed or at best inaccurate. This is based on your numbers being correct it is easy to be off if your thermometer is off a bit. By your numbers it would read cooler not hotter. I had a 14 and overheating was never a issue with mine. The air can be hard to remove from the coolant. I change my temp sensor on Fiesta 06 plate. The resistance values were way above the values in Haynes. I tested my car with a variable resister and it matched the Haynes values. Where do I get the correct part from. I'm getting confused. Has anyone else had a. If you were to test the coolant temperature sensor alone, you may think that it failed because its resistance value has remained at about 1500 or 2100 ohms, for example, when in fact the sensor is reporting the coolant actual temperature and it's working properly. You could rely on the temperature gauge on your dashboard. If you were to test the coolant temperature sensor alone, you may think that it failed because its resistance value has remained at about 1500 or 2100 ohms, for example, when in fact the sensor is reporting the coolant actual temperature and it's working properly. You could rely on the temperature gauge on your dashboard.

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Coolant temp sensor location on 2007 audi A4 2 We welcome and value your feedback The sensor modifies a voltage signal from the Engine Control Module (ECM) Hey, I have had a problem going on for about a good 2 weeks now, My car has been overheating, :eek: but only goes about 3/4 of the way and tends to say there, but the Most Coolant. Very cool, the work you did with the engine fan. Basically all I wanted to do was test the sensor. Since you said that the normal operating range was 0 - 10k ohms, I unplugged it from the wiring harness and checked it with an ohm meter when it was cold, then ran the engine to normal operating temperature. Value at nearly cold iron- 9k ohms. The coolant temperature sensor monitors coolant temperature and then displays the measurement to the vehicle’s occupants. The engine can be in danger of damage if it operates at too high of a temperature. The coolant temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and. Joined Feb 5, 2007. 24,215 Posts. #5 · Jan 17, 2014. As a rough and ready guide engine coolant temp sensors usually drop to a tenth of the standard temp value at 20 degrees C when the engine is running at optimum temperature. For instance if the resistance is around 3800 ohms at 20 degrees the reading should drop to 380 degress at around the. For a given sensor you can determine the constants by getting the resistance at two temperatures. The curve of an NTC sensor is exponential and I needed that curve to program my IQ3 dash. Knowing the equation I measured the resistance at 0 & 100C and backed out the constants. Using that data I generated a set of R vs T values that I could plug. Feb 8, 2006. #3. The engine will switch from start to open loop when the engine is doing more than 400 rpm.It will then stay in open loop until the o2 sensor is sending an input & the engine is over 40deg. This is when the coolant sensor is reading 1200 ohms or less. This is the resistance of the ecm coolant sensor not the guage. The coolant temperature sensor is crucial to ensuring that the engine is operating at its optimal temperature. If the coolant sensor malfunctions in any way, it can cause a number of issues with your engine’s performance. A bad coolant temperature sensor can cause the car to stall and will damage Continue Reading. The internal resistance of the sensor is determined. The resistance is temperature-dependent. When the engine is cold it is high-impedance, and when the engine is hot it is low-impedance. Depending on the manufacturer: 25°C 2.0 - 6 KOhm or 80°C approx. 300 Ohm Please note the special reference value specifications. 2 Test step 2. Feb 8, 2006. #3. The engine will switch from start to open loop when the engine is doing more than 400 rpm.It will then stay in open loop until the o2 sensor is sending an input & the engine is over 40deg. This is when the coolant sensor is reading 1200 ohms or less. This is the resistance of the ecm coolant sensor not the guage. If you want to use the stock 280z CLT sensor, these are the temp/resistance values that I measured for it. It reads almost dead-on now. The IAT values on the right are just the GM defaults to go with my Buick IAT sensor. ... 280z Coolant Temp Sensor Values for Easytherm 280z Coolant Temp Sensor Values for Easytherm. By nienberg.11, July 12. This article applies to the Ford F-150 (2004-2014). Electrical sensors play a major part in how your truck runs. Newer vehicles are adding more and more sensors for multiple reasons including monitoring air flow, controlling fuel pressure, checking fluid level, etc. The one thing in common is all the sensors monitor some aspect of your vehicle. 10pcs 10k PVC NTC thermistor probes, prevent moisture + copper temperature sensor probe for dispenser : Amazon.sg: Automotive. Skip to main content.sg. Hello Select your address All. Hello, Sign in. Account & Lists Returns & Orders. Cart All. Search: Airflow S3 Sensor Example. pressure across a series of step sensor blades to measure air flow Here is an example of a DAG. Order TOPRAN 400868 Coolant Sensor Blue Number of pins: 2-pin connector Our price: 4,25 € – a saving of 33% Buy today. The sensor for the lean burn should read"continuity with a resistance less than 100 ohms" when measured below 60 degrees. When hot, the sensor should read no continuity. The coolant temp sensor should read between 500 and 1100 ohms when the motor is cold and the ambient temperature is less than 90 degrees. In the Helm manuals there is a table (pages 6-935, 6-1377 in my year's book F): degC degF Ohms. 150 302 47. 140 284 60. 130 266 77. 120 248 100. 110 230 132. 100 212 177. Water Temperature - Ohms Reading approximate temp to resistance chart from a Mercruiser service manual 210 à °F (100à °C): 185 160à °F (70à °C) : 450 ... I was thinking since Merc recently has put the yellow wire from the coolant sensor into the ICM, that the gray wire going into the ICM would sound the warning horn as well for.

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Oct 15, 2008. #2. This is some very good info, especially the coolant sensor is a very interesting read with the step in the voltage. I think this is worth keeping as it shows the voltages one would expect to see when checking the sensor if you fuel consumption is up and you suspect the temp sensor. Youv'e had a barry with the cas link, i've. Set your meter to Ohms, and see what resistance you get. It will tell you what it thinks the room temperature is. For example, I have a Temperature Gauge Sensor that I recently removed from my 87. The temperature in the house is 77. The resistance tells me that it's just over 90 degrees. 3,894 Posts. #3 · Jan 22, 2019. The maintenance manual instructions state to drain the coolant system first. The video guy didn't mention that he did that, and since he said it only took him 20 min, I'm guessing that he didn't. But I'd also guess you might lose some coolant, so I'd be checking the reservoir for a few days after you get it. The condensed Resistance VS Temperature Tables on the following pages are provided to aid in the proper RTD element selection. Notice that the tables for the various platinum curves are for the standard 100 ohm @ 0°C sensor. To calculate the resistance of: 50 ohm, multiply the values by .5; 200 ohm, multiply the values by 2;. The cooling fan(s) should come on at approximately 92 °C to reduce coolant temperature. If your coolant temperature consistently runs higher than 100 °C, it's time to start looking for problems. ... check the surface temperature on the block near the DME temperature sensor. Compare resistance to the value in the table below. DME Temperature. Disconnecting either sensors is not a good test as in many cases this forces the ECU into default mode whereby it assumes standard figures. 20 degrees C = 3550 ohms + or - 500 ohms 80 degrees C = 335 ohms + or - 35 ohms 90 degrees C = 240 ohms + or - 30 ohms. The coolant temperature sensor monitors coolant temperature and then displays the measurement to the vehicle’s occupants. The engine can be in danger of damage if it operates at too high of a temperature. The coolant temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and. Discussion Starter · #1 · Jun 4, 2009. I have a frustrating intermittent fault on the water temp guage. Could be sensor, guage or any point in between. All tests so far have been inconclusive. Can anyone point me in the direction of a chart of sensor resistances at different temps, I have seen one somewhere on the web but have spent a couple. Water Temperature - Ohms Reading approximate temp to resistance chart from a Mercruiser service manual 210 à °F (100à °C): 185 160à °F (70à °C) : 450 ... I was thinking since Merc recently has put the yellow wire from the coolant sensor into the ICM, that the gray wire going into the ICM would sound the warning horn as well for. Coolant temperature sensor resistance versus temperature values: Measured from 1998 KLR650 Cowasaki specifications: 47 – 57 Ohms @ 80 C - 176 F 26 – 30 Ohms @ 100 C – 212 F Measured values (1998 KLR650) 82 Ohms @ 150 F 54.5 Ohms @ 150 F 33.5 Ohms @ 210 F 25.0 Ohms @ 220 F 17.7 Ohms @ 240 F 9.9 Ohms @ 270 F. I change my temp sensor on Fiesta 06 plate. The resistance values were way above the values in Haynes. I tested my car with a variable resister and it matched the Haynes values. Where do I get the correct part from. I'm getting confused. Has anyone else had a similar problem. Cheers. I change my temp sensor on Fiesta 06 plate. The resistance values were way above the values in Haynes. I tested my car with a variable resister and it matched the Haynes values. Where do I get the correct part from. I'm getting confused. Has anyone else had a similar problem. Cheers.

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Discussion Starter · #1 · Jun 4, 2009. I have a frustrating intermittent fault on the water temp guage. Could be sensor, guage or any point in between. All tests so far have been inconclusive. Can anyone point me in the direction of a chart of sensor resistances at different temps, I have seen one somewhere on the web but have spent a couple. The resistance of the temperature sensor changes depending on coolant temperature. As the temperature increases, the resistance is reduced, which reduces the voltage at the sensor. The control unit evaluates these voltage values, since they are directly related to the coolant temperature (low temperatures result in high voltage values at the. Coolant temp sensor location on 2007 audi A4 2 We welcome and value your feedback The sensor modifies a voltage signal from the Engine Control Module (ECM) Hey, I have had a problem going on for about a good 2 weeks now, My car has been overheating, :eek: but only goes about 3/4 of the way and tends to say there, but the Most Coolant. Since lower fuel economy often does indicate that the ECT has gone bad, replace it with a new one and observe your car's fuel economy. If it is still lower than normal, the source of this issue may be caused by another faulty component of engine. Standard Honda Civic ECT sensors run from about $20 to $40. Replacing it yourself is a simple task. Oct 15, 2008. #2. This is some very good info, especially the coolant sensor is a very interesting read with the step in the voltage. I think this is worth keeping as it shows the voltages one would expect to see when checking the sensor if you fuel consumption is up and you suspect the temp sensor. Youv'e had a barry with the cas link, i've.

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Here's the results: At 20 C, the resistance was 2460 Ohms, which is acceptably close to the 2.5 kOhms indicated in the earlier chart. This was on my 07, confirming the use of the same approach as in the earlier generation. Based on this, there's a reasonable probability that the relationship between the sensor resistance and the ECM temperature. They are all resistors or resistor bridges. Coolant temp sensors have a very steep temp vs resistance curve. 25K ohm or so is normal for perhaps 30F ambient temperature. It drops very rapidly with heating, until at normal engine temperature, the reading is between 600 and 1000 ohms. Your numbers are consistently high that tells me the sensor is failed or at best inaccurate. This is based on your numbers being correct it is easy to be off if your thermometer is off a bit. By your numbers it would read cooler not hotter. I had a 14 and overheating was never a issue with mine. The air can be hard to remove from the coolant. Engine Coolant Temperature Sensor Resistance CheckingDisclaimer:This video is not meant to be a definitive how to.Always consult a professional repair manual.

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