LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0171 To P0463 >> DTC P0181: FTT Sensor >> Component Function Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Function Check

  1. CHECK FUEL TANK TEMPERATURE (FTT) SENSOR
    1. Turn ignition switch OFF.
    2. Disconnect fuel level sensor unit and fuel pump harness connector.
    3. Remove fuel level sensor unit. Refer to "EXPLODED VIEW ".
    4. Check resistance between fuel level sensor unit and fuel pump terminals by heating with hot water as shown in the figure below.
      Terminals Condition Resistance (kΩ)
      4 and 5 Temperature [°C (°F)] 20 (68) 2.3 - 2.7
      50 (122) 0.79 - 0.90
      Fig 1: Checking Fuel Tank Temperature Sensor
      G08255695Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Proceed to "DIAGNOSIS PROCEDURE ".

  2. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: INSPECTION END

    NO: Proceed to "DIAGNOSIS PROCEDURE ".