Engine Coolant Temperature Sensor Circuit Diagram

As with the 4 cylinder engines this 4 pin sensor is also a combination sensor but the circuit is shared with the after run coolant fan control. Connect an ohmmeter between the ect sensor terminals and set the ohmmeter scale on 200000 ohms.

Temperature Sensor Wire Diagram Thermostat Lt1 Coolant Temp Sensor

If the temperature gauge does register the engine coolant temperature it is obvious that the coolant temperature sensor or its control circuit that communicates with the pcm is defective.

Engine coolant temperature sensor circuit diagram. After the engine start coolant temperature begins to rise. If this is the case the operation of the electrical radiator fan will almost certainly be affected. Engine coolant temperature sensor wiring diagram collection water pump diagram water pump fits nissan primera p10 2 0d 91 to well known water pump installation diagram rd03 documentaries for engine coolant temperature sensor wiring diagram collection 1999 toyota corolla parts diagram new toyota corolla 2 0d 1999 for famous chiller system diagram hy22 documentaries for change jaguar.

On vr6 engines the coolant temperature gauge sensor terminals are 2 signal which is bluewhite and terminal 4 ground which is brown. If there is an open circuit the intelligent tester indicates 40 c 40 f. The signal from the coolant temperature sensor tells the engines computer when to apply extra gasoline during a cold start.

With the engine cold and the ignition switch in the off position measure and note the ect sensor resistance. Attach the engine wiring harness connector to the sensor. In cold engine and an ambient temperature of 20 ºc the sensor resistance is between 2000ω and 3000ω.

Read value using intelligent tester check for open in wire harness disconnect the b4 engine coolant temperature ect sensor connector. Engine coolant temperature sensor testing. By measuring engine coolant temperature the ecm engine control module knows the average temperature of the engine and tells the computer what the engine temperature is so that optimum driveability is realized while the engine is warming up and when the engine has reached operating temperature.

If the engines computer detects a problem with the coolant temperature sensor or its circuit it will turn on the check engine light. Engine coolant temperature sensor circuit diagram. Ect gradually heats and its resistance reduces proportionately.

At 90 ºc its resistance is in the range of 200ω to 300ω. If there is a short circuit the intelligent tester indicates 140 c 284 f or higher. Your check engine light is on.

Engine coolant temperature sensor wiring diagram see more about engine coolant temperature sensor wiring diagram engine coolant temperature sensor circuit diagram engine coolant temperature sensor wiring diagram. When the engine is first started it will require more fuel in order to idle smoothly until its warmed up. Disengage the engine wiring harness connector from the ect sensor.

P0118 2010 Nissan Sentra Engine Coolant Temperature Sensor Circuit High