Nissan 22630-5S700 Sensor Assembly-Fuel TEMPERATUER

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Some 1995 and later models are equipped with a fuel temperature sensor. The fuel temperature sensor senses the fuel temperature of the fuel inside the tank. The sensor is a thermistor, which is a variable resistor that changes its resistance as temperature changes. As fuel temperature increases, sensor resistance decreases and vice versa. The sensor is located in the fuel tank on the fuel level sending unit. The PCM uses this information for diagnostic purposes. A problem In the fuel temperature sensor circuit will set a trouble code. Note: Performing the following test will set a diagnostic trouble code and illuminate the Check Engine light. Clear the diagnostic trouble code after performing the tests and making the necessary repairs. Remove the rear seat and the fuel pump/ fuel level sending unit access cover. Before checking the fuel temperature sensor, check the voltage supply and ground circuits from the PCM. Disconnect the electrical connector from the fuel level sending unit/fuel temperature sensor. Connect a voltmeter to the pink/blue or red/blue (+) and black (-) wire terminals of the harness connector. Turn the ignition key On - the voltage should read approximately 5.0 volts. If the voltage is incorrect, check the wiring from the sensor connector to the PCM and from the connector to the engine ground point. If the circuits are good, have the PCM checked at a dealer service department or other properly equipped repair facility. Using an ohmmeter, measure the resistance between the two fuel temperature sensor terminals. With the system at room temperature (68-degrees F,20-degrees C), sensor resistance should be 2,300 to 2,700 ohms. A more accurate check may be performed by removing the sensor and suspending the tip of the sensor in a container of water. Heat the water on the stove while you monitor the resistance of the sensor. Compare your measurements to the intake air temperature sensor resistance chart. If the sensor resistance test results are incorrect, replace the fuel temperature sensor. Remove, the fuel level sending unit. Remove the fuel temperature sensor from the fuel level sending unit. Installation is the reverse of removal.