Get it as soon as Mon, Feb 8. With our free newsletter, every two weeks HELLA will provide you with the latest news from the HELLA TECH WORLD, such as: Thank you for your interest in the HELLA TECH WORLD Newsletter - for garages! Please note: Your subscription will only be complete after you have confirmed receipt of this e-mail. The coolant temperature sensor is what tells the car's computer what the engine's running temperature is. Page 1 of 3: How to test the Engine Coolant Temperature Sensor. It’s one of the few parts in your car that’s cheap enough that it’s often easier to just replace it rather than spend time testing it. This is your coolant temperature sensor. Please switch to manual vehicle identification to search for your vehicle. Gain an advantage through knowledge. Now, with this special sensor, the engine will adjust itself so that it runs smoothly even on the coldest days and does not overheat once the temperature rises. Submerge your temperature sensor in the hot water and wait a few seconds to let your multimeter take a reading. Therefore, A visual inspection of the (ECT) sensor will sometimes reveal a problem. submitted to our "DoItYourself.com Community Forums". Coolant gauge starts in high range upon start. 5 V. If the voltage value is not reached, the voltage supply of the control unit and the ground supply must be checked according to the circuit diagram. In order for a diagnosis, the ignition is switched off and the coolant temperature sensor connector is disconnected. Coolant Temp Sensor Test. On the V-8 models it's next to the number one spark plug wire boot. Questions of a Do It Yourself nature should be Connect ohmmeter between temperature sensor plug and removed control unit plug. Depending on the manufacturer: 25°C 2.0 – 6 KOhm or 80°C approx. These cookies are necessary to provide you with the basic functions during use of the website. The coolant temperature sensor informs the engine control unit about the operating temperature of the engine, so that the fuel quantity and ignition point can be adapted accordingly. Testing Coolant Temp Sensor: I am going to show you a few quick ways to test the coolant temp sensor using a scan tool, the instrument cluster and a digital multi-meter. With our free newsletter, every two weeks HELLA will provide you with the latest news from the HELLA TECH WORLD. The resistance of the temperature sensor changes depending on coolant temperature. You and your skills take centre stage for HELLA – this is why we will get you ready for a high-tech future with our training program. If you would like to unsubscribe from the newsletter, please click here. This enables the safe and accurate testing of your Coolant Temperature Sensor at an affordable price. Before the automated systems in vehicles, this was the sole purpose of the temperature sensor. 92' Ford Ranger XLT with 2.9 V6. If the signal is wrong, this important calculation will be misjudged. Start by checking for coolant leaks, if there are not leaks the thermostat might be stuck open or closed and may need to be replaced, you still have an issue the engine coolant temp sensor or cylinder head temp sensor. Set the multimeter to the Ohm symbol for resistance. We're here to guide you through the process. Coolant temperature sensors are used by the fuel management system to detect the engine's operating temperature. For this, all you have to do is enter your e-mail address. When the engine is cold it is high-impedance, and when the engine is hot it is low-impedance. Check the supply voltage at the removed sensor plug using the voltmeter. In addition, problems may also occur with the exhaust gas test cycle through increased CO values or intermission of the lambda control. An ohmmeter (electrical instrument to measure electrical resistance) is attached to the sensor terminal.The sensor can also be completely removed from the engine and submerged along with a thermometer into a water-filled container. then check the sensor in the warm sensor (after the engine is run). A bad engine coolant temperature sensor (CTS or ECT) can seriously disrupt the fuel system and engine operation of your car.. That's because the ECT sensor tells the Electronic Control Module (ECM—your car computer) at what temperature the engine is operating, so the computer can make some important decisions. View our Privacy Policy here. To ensure our content is always up-to-date with current information, best practices, and professional advice, articles are routinely reviewed by industry experts with years of hands-on experience. 300 Ohm Please note the special reference value specifications. Reference value: approx. Depending on the sensor information, the control unit adapts the injection time and firing angle to the operating conditions. Causes of faulty coolant temperature sensors. This can be any solid piece of metal. If not, then it is not working correctly. If you do not see anything that is more than 200 ohms in difference, the coolant temperature sensor is defective and will need to be replaced. This is why it's important to learn how to tell if coolant temp sensor is bad. While the engine is running you need to be continually checking the digital ohm meter. Thereby, a coolant temperature dependent variable voltage signal is send to the onboard computer. All rights reserved. Locate the coolant temperature sensor in your vehicle by referring to the service manual. I want to replace the coolant temperature sensor on my truck. This means that the internal resistance reduces as the temperature increases. Your personal information is stored and processed for the exclusive purpose of sending the newsletter. The engine coolant temperature (ECT) sensor test is simple and can help you fix your car faster. The coolant temperature sensor, abbreviated as CTS, in your car is an important device that enables the control unit to give alerts if the engine is overheating or if the temperature within the system is rising for some reason. Attach the black lead of the volt-ohm meter to the body of the cold sensor (this is before turning the engine on). Testing Codes: P0117, P0118. The Coolant Temperature Sensor's Function. In most cases; the only way to know if the (ECT) sensor is good or bad is; to measure its resistance and voltage readings. Together we get cars back on the road quickly. Keep in mind that many (ECT) sensor problems are more often due to; wiring faults and loose or corroded connectors than failure of the sensor itself. I have a 110 volt Waterstar infrared dry sauna. Ford 4.6L, 5.4L. Our cookies do not contain any personal information. HELLA: A powerful product range. to this site, and use it for non-commercial use subject to our terms of use. Disconnect the connector from the coolant temperature sensor (temperature sending unit). This could be severe corrosion around the terminal; a crack in the sensor; or coolant leaksaround the sensor. You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. Alternatively you can use the drop-down menu to select other relevant spare parts in the respective category. You should have a reading of approximately 2000 ohms. After the engine start, coolant temperature begins to rise. Testing Codes: P0117, P0118. Show additional information on our newsletter, Hide additional information on our newsletter. A bad engine coolant temperature sensor affects engine performance: It may cause a constant lean air/fuel mixture, causing the engine to stall or idle rough. DoItYourself.com®, founded in 1995, is the leading independent The information provided on this website is intended for use by suitably qualified personnel only. 79. At 90 ºC its resistance is in the range of 200Ω to 300Ω. 0 Ohm (circuit diagram required for pin assignment on control unit). Please try again or use the manual vehicle search. Check the electrical connections of the sensor wiring, the plug, and the sensor for correct connection, breaks, and corrosion.

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