3 Wire Coolant Temperature Sensor Wiring Diagram

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Coolant temperature sensor wiring diagram. 3 wire ect diagram. The signal from the sensor is shown and can be downloaded. When the engine cools, the contacts on the fan relay switch open, and the fan stops automatically.

Intake air temperature (iat) sensor wiring diagram. An intake air temperature sensor or iat sensor has the following two wires. The iat sensor has two wires, which come from the ecu. A positive current is supplied from the ecu to the iat sensor and goes back through the ground wire. Connect both wires to the connecting terminals of the ect sensor and measure the resistance. Then start the car's engine. Set the car to neutral and put the car on parking brakes. 5 volt reference wire ground wire earth signal wire for cluster mounted temperature gauge 3 wire coolant temperature sensor wiring diagram.