Every driver knows that coolant/antifreeze is needed to keep an engine at optimum temperature. When the ECT (engine coolant temperature… The ECT sensor may also control the temperature gauge on your dash, though in some vehicles, that is done instead by the engine coolant sending unit, otherwise known as a temperature switch. This information is also used to send an accurate reading of the engine temperature to a gauge on the dashboard. A cold engine will provide an open circuit, and no current can flow from the sender to the fan relay. Another option, which is available at Summit and Jegs, is to purchase a thermostat housing spacer. To make sure the new sensor is working, start the engine and as it warms, monitor the temperature gauge on the dash to make sure the correct temperature is being sustained. If your coolant temperature is 210 degrees, it's the same as seeing 185 degrees, and it's switched on. He wanted to keep the factory gauge, which only read C to H, but wanted an additional gauge that would tell him what the actual temperature is. One advantage to the EFI conversion kits is that there is a dedicated output to use for electric fan relays, and the EFI controller can be used to switch the fans on at a set temperature, and off again when the temperature drops below a certain point. Prestone car maintenance products are tested in extreme conditions, so you can be confident they offer long-lasting performance for everyday driving. This informative video provides information on testing and replacing automotive The CTS is connected to the ECU by a connector, which you’ll need to unfasten and remove. On most vehicles, the coolant temperature sensor (CTS) can be found somewhere near the engine thermostat, which allows it to function optimally. But how do cooling systems know when the engine is operating at the right temperature?
If you take the wire off of this sender and ground it, you're essentially sending the full current to your gauge and it should peg at the highest temperature reading on the gauge itself. Check out all of our articles... MAP Sensor Do this carefully, as the plastic connector and wiring can often be brittle and will need completely replacing if it breaks. There are ways to get around this by using a thermostat spacer or a brass T-fitting. A cold engine will give a static temperature of about room temperature, and as the engine idles/runs, the resistance decreases and sends that info to the computer, much like it does for a temperature gauge. Set the new sensor in the threads and twist clockwise by hand, making sure the sensor is well-seated in the socket. Sharing The Fan Relay Sender With A Gauge: Bad Idea. It started to get more complicated, because electronic fuel injection requires a dedicated temperature sender for the computer, separate from the sender used for the gauge. This caused a couple of problems, and some false readings.
This completes the ground circuit and if everything is wired correctly the fan relay clicks closed, and the fans come on. The ECT sensor is basically a thermistor that changes resistance with temperature. An ECT sensor, or Engine Coolant Temperature Sensor is a sensor that is screwed into the engine's block or cylinder head and is used to determine the temperature of the engine coolant. Since the new fan spins (vs … Because the fan relay sender is just a switch, it doesn't detect variables in temperature like a typical gauge sender does. The engine coolant temperature sensor is temperature-variable resistor, which usually has a negative temperature coefficient. Information about your device and internet connection, including your IP address, Browsing and search activity while using Verizon Media websites and apps.
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