How to know if your ECT sensor has failed?
How to know if your ECT sensor has failed?
Here is a photo of one ECT sensor: If the ECT sensor or associated wiring has failed, you may see some of the following ECT sensor DTC trouble codes: P0115 – P0116 – P0117 – P0118 – P0119 – P0125 – P0126 – P0127 – P0128 This informative video provides information on testing and replacing automotive ECT sensors.
Where does the coolant temperature ( ECT ) sensor go?
The readings from the engine coolant temperature (ECT) sensor; are sent back to the engine control unit (ECU). The engine coolant temperature (ECT) sensor is one of the most important; engine management sensors.
What should the ECT reading be when the engine is hot?
In general terms if the ECT reading is cold the reading could be less than 0.5 volts (on the ground signal) and when the engine is hot the reading could be around 4 volts. For specific readings for your application, see a vehicle-specific repair manual. Note that the ECT sensor is not the same thing as a coolant temperature SENDER.
How to test the ECT / CHT sensor resistance?
There are several ways to test the ECT sensor; you can find the correct way in the service manual. Testing the ECT/CHT sensor Resistance: One way is to measure the resistance of the sensor at different engine temperatures and compare the readings to the specifications listed in the service manual.
Why is my ECT sensor not working properly?
Because the tip of the sensor has to be immersed in coolant, the low coolant level or air pockets inside the cooling system can cause the signal from the sensor to be incorrect. The coolant level always has to be checked first when dealing with cooling system problems. The ECT sensor connector must be checked for damaged pins or corrosion.
How to check the ECT / CHT sensor voltage?
Checking the ECT/CHT sensor Voltage: Another way to test the sensor is to measure the voltage across the sensor terminals with the ignition on. Checking the ECT sensor voltage. The sensor is connected to the engine computer (PCM). The PCM supplies the reference voltage (typically 5 Volt); another wire is the sensor ground.
How can I tell if my temperature gauge is inoperative?
To diagnose an inoperative temperature gauge, you’ll need to test the coolant temperature sensor and the wiring for that circuit. You should have a service or repair manual written for your specific vehicle prior to attempting these tests. You will need to drain and fill the cooling system as well as test specifically colored wires.
How to troubleshoot a temperature gauge in a car?
Temperature gauge troubleshooting begins with isolating the problem either to the gauge, sending unit, fuse or wiring. As with any electrical troubleshooting it is best to check all wiring connections are clean, tight and free of corrosion. The following process must be preformed with the ignition key turned to the “on” position.
