![]() One ECT sensor might not be as much reliable to operate the fan efficiently. This secondary ECT Sensor works together with the primary ECT Sensor to optimize the working of the car and give an accurate reading of the coolant to the car ECU before it is heated up, saving it from potential overheating problems.Īdding an ECT sensor is another way to get a more accurate reading. To keep the radiator of the engine working properly and to regulate the temperature of the engine constantly, locating these leakages is also very important. However, the one location where the secondary ECT Sensor is seldom placed in the radiator is the outlet of the radiator tank or pipe as it is the most common place for leakage of the engine coolant fluid. The location of this sensor is not very common and is found in different locations in different cars. The other Engine Coolant Temperature Sensor is known as the secondary ECT sensor or the ECT sensor 2. This cylinder head closes the top opening of the cylinders and packs it into a casing forming a combustion chamber for the fuel and air to mix and react. In an internal combustion car’s engine, the cylinder head is placed on the top of the car’s cylinders above the cylinder block. This sensor is located on the coolant passage next to or in the thermostat housing of the cylinder block or cylinder head. The main Engine Coolant Temperature Sensor is known as the primary ECT sensor or ECT sensor 1. One sensor is located near the thermostat valve housing, and the second one is located in the radiator outlet tank or pipe. The pair sensors can be installed in different places, depending on the make, model, and year. Most of the cars that are being used nowadays contain pairs of Engine Coolant Temperature (ECT) Sensors for the purpose of sending accurate and precise information to the car ECU. These sensors are directly connected to the car ECU for measuring the temperature of the engine coolant. This sensor consists of wires ranging from 1 to 4. Also, there are many fault codes that can be set related to temperature sensors, and they mean very different things.But modern cars, have coolant temperature sensors placed next to the thermostat housing, which is directly connected to the car ECU. First we have to rule out wiring and connector terminal problems associated with that part. ![]() They only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. Fault codes never say that on any brand or model. The last concern is the diagnostic fault code did not say to replace the sensor or that it was bad. It's much more common to find spread or corroded connector terminals that aren't making a solid connection. Ford did have a lot of trouble with the two-wire sensors in the early to mid '90s, but other than that, temperature sensors have an extremely low failure rate because there's just one component inside them. The other is for the Engine Computer and will always have two wires. One is for the dash gauge and will have just one wire connected to it. The next problem is there are usually two of them. With inline engines, they might be found on the side of the block. On V-type engines, you might also find them on the intake manifold. At this point I can't show you were they are, but you will usually find them close to the thermostat housing at the end of the upper radiator hose. They do make reference to two other coolant temperature sensors, but they aren't even shown on the electrical diagrams. There is a cylinder head temperature sensor indicated at the bottom / center of the first drawing. The first one is there is no drawing that shows the location of the coolant temperature sensors.
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