![]() ![]() Start your car and allow it to run for a few minutes to ensure that the coolant temperature readings are authentic and that the engine is running efficiently.Once you have verified that the wiring is accurate, reconnect the negative battery cable.The resistance values should correspond to the temperature of the engine coolant. Use a multimeter to test the sensor’s resistance and ensure that the wiring is accurate.Refer to the wiring picture for your specific sensor type to determine the correct wire links. Depending on the type of sensor, you may need to ground the sensor wire or connect it to a 1-wire and a reference voltage wire.The sensor is typically located on the engine block and is in contact with the engine coolant. Disconnect the black battery cable to prevent any electrical shocks or damage to the system.You can consult your car owner’s manual or a repair handbook to determine the type of sensor and its wiring diagram. Identify the type of coolant temperature sensor in your car.Related Post: Can A Bad Coolant Temp Sensor Cause Rough Idle, No-Start, Or Misfire 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. When the temperature of the coolant increases, the resistance of the sensor decreases, which sends high earth 1-wire to the temperature gauge, and you see the temperature gauge indicator fully turned to the hot indication. Higher the temperature of the engine’s coolant, the lower the resistance of the ECT sensor, and vice versa. The coolant temp sensor provides an earth signal according to the temperature of the coolant. In three-wire coolant temp sensors, the ECU does not control the temperature gauge in the cluster. The two wires, a “5-volt reference”, and a “ground wire” go to the ECU, and the third wire “Earth 1-Wire for Temp Gauge” goes to the cluster-mounted temperature gauge by providing an earth link to the temperature gauge. Earth 1-Wire for Cluster-Mounted Temperature Gaugeģ-Wire-Coolant-Temperature-Sensor-Wiring-Diagram.A three-wire coolant temp sensor has the following three wires. The three-wire coolant temperature sensor is superseded by a two-wire coolant temp sensor. 3 Wire Coolant Temperature Sensor Wiring Diagram 3-Wire-Coolant-Temperature-Sensor-Wiring-Diagram Your consent can be revoked at any time in our footer via the cookie settings.III. By clicking on ""Refuse all cookies"" you refuse this. Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant. By clicking on ""Allow all cookies"", you expressly consent to the access to and storage of information in your computer or mobile device, the processing of your personal data, and the transfer of your data to third countries for the above-mentioned purposes. The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant. If data is transferred to third countries, there is a risk that authorities may access and evaluate this data and that your data subject rights may not be enforced. In the process, data is also passed on to service providers. ![]() If you give us your consent for this, we process your information and data for the integration of external content/media, for usage analysis and related statistical purposes, for personalising our offers, for displaying personalised advertising, and for evaluating our advertising campaigns. On our website, we use cookies and other comparable technologies with which we read/store information on your computer or mobile device and process personal data that is necessary, among other things, for the operation of our website. ![]()
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