jeep cherokee 1990 base 4.0l water temp gauge sensor

• 2023-04-20

The sensing element of the jeep cherokee 1990 base 4.0l water temp gauge sensor is a thermistor with negative temperature coefficient. The higher the water temperature, the smaller the self resistance, and the larger the voltage signal. If there is a problem with the water temperature sensor of a car, how should it be checked? What kind of relationship will a malfunction cause to a car? Let's take a look at how to check the water temperature sensor. 

Check the jeep cherokee 1990 base 4.0l power supply voltage. Unplug the plug and use the two probes of a multimeter to check if the voltage between the two wires is higher or lower than the reference voltage of 5V (some models directly provide 12V voltage to the water temperature sensor, such as a water temperature gauge). Read the data stream. The normal water temperature signal is mostly around 95 ℃ (for high-temperature engines, it is around 115 ℃). If an abnormal signal is found from the water temperature sensor, maintenance should be carried out. For example, if the jeep cherokee 1990 base 4.0l water temperature signal displays -40 ℃, it indicates an open or short circuit in the negative electrode. If there is no change at 130 ℃, it indicates a short circuit in the positive electrode (some cars may display it at 140 ℃). Check the resistance. Heat the water temperature sensor and measure its resistance (at an external temperature of 30 degrees, the resistance is approximately 1.4k ω To 1.9k ω).

If the jeep cherokee 1990 base 4.0l water temp gauge sensor doesn’t work , can change a new one. If the water temperature sensor is damaged, the cold car will be difficult to start, the fuel filler will emit black smoke, and the fuel consumption will increase. In some cars, the cooling fan will continue to rotate constantly, and automatic transmission cars cannot move into overdrive. If the water temperature sensor is damaged, the instrument detects an inaccurate water temperature signal, and the water temperature gauge displays abnormally. Will make incorrect judgments. Can check the before jeep cherokee 1990 base 4.0l water temp gauge sensor , then change a same specification sensor. Friends need to check if there is a problem with the water temperature sensor of the car. What kind of relationship will a malfunction cause to a car? These problems have all been solved. As cars become increasingly important to us, we need to take care of them.