First, be sure it is getting voltage at the harness; a bad harness or a cut in the wire can cause the same symptoms as a bad ect. to test the harness for voltage, turn the key to the on position and use a multi meter to measure for 5 volts dc. the voltage may vary slightly but should be close to 5 volts. The coolant temperature sensor connector secures the connection in the coolant system wiring harness. over time, the connector can melt or break down due to heat. if your vehicle overheats without warning, the coolant temperature sensor or connector may be faulty. other problems might include your vehicle struggling to start after reaching.
Locate your temperature sensor next to your thermostat. follow your upper radiator hose towards the engine. at the end of the hose is the thermostat housing. attached to the thermostat or installed right next to it is the temperature sensor which looks like a small, black device plugged into a wire harness. The trouble code may be referencing several underlying issues. for example, you could have something as simple as a bad connection at the sensor or a bad ground circuit between the engine coolant temperature sensor and the powertrain control module. also, between the sensor and the powertrain control module, you could have a voltage short. Here is a more detailed list of the signs of a bad or failing coolant temperature sensor to look for: 1. check engine light. one of the first signs of all coolant temperature sensor symptoms you will probably notice is that the check engine light will show up on your dashboard. if the computer detects any problem with the sensor’s circuit, it. The coolant temperature sensor location in an old distributor ignition engine. follow the upper radiator hose towards the engine. the thermostat housing is on the hose’s end, and the engine coolant temperature sensor is right next to it in the form of a tiny black device linked to a wire harness. step 2: unplug the sensor from the vehicle.
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