Similarly, when the engine coolant temperature decreases, the sensor resistance also decreases, which sends low earth signal to the temperature gauge, and the indicator rests on the cool indication. EK-Loop Connect - Temperature Plug Sensor is an NTC (negative temperature coefficient) coolant temperature sensor. with Engine Coolant Temperature (ECT)Sensor -G2. Oh words next to the picture would be: 6 - Engine Coolant Temperature (ECT) Sensor -G62. When the temperature of the coolant increases, the resistance of the sensor decreases, which sends high earth signal to the temperature gauge, and you see the temperature gauge indicator fully turned to the hot indication. Here is the picture: Item 6 is the coolant tempersture sensor that if disconnected gives you 20 seconds of glow plug on as the ECM thinks it is really cold. The coolant temperature sensor monitors coolant temperature and then displays the measurement to the vehicles occupants. Higher the temperature of the engine’s coolant, the lower the resistance of the ECT sensor, and vice versa. Coolant temperature sensors help maintain the temperature of your engine coolant, which in turn helps maintain your engines temperature. The coolant temperature sensor provides an earth signal according to the temperature of the coolant. There is also a CHT (cylinder head temp) sensor mounted on the back of the head near the turbo coupling to the head. The coolant temp sensor is on this fitting.
Coolant temp sensor drivers#
In three wire coolant temperature sensors, the ECU does not control the temperature gauge in the cluster. On the drivers side end of the head you will see a rectangular black plastic adaptor with hoses going into and out of bolted to the head. In recorder mode a streaming measurement is performed, continuously displaying. The smoke exhaust pipe is going to emit black smoke 2.4 4. Correct functioning of the coolant temperature sensor can be checked by measuring the following signal voltages, see figure 1: The lab scope is connected to the coolant temperature sensor via a Measure lead TP-C1812B and Back Probe TP-BP85 and set to recorder mode. The check engine light is going to activate 2.3 3. The two wires, a “5-volt reference”, and a “ground wire” go to the ECU, and the third wire “Earth Signal Wire for Temperature Gauge” goes to the cluster-mounted temperature gauge by providing an earth signal to the temperature gauge. 1 What is a coolant temperature sensor 2 Signs of a bad or failing coolant temperature sensor. 3 Wire Coolant Temperature Sensor Wiring Diagram
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