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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0445 (Qr25DE) >> DTC P0182, P0183 FTT Sensor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK GROUND CONNECTIONS
    1. Turn ignition switch OFF.
    2. Loosen and retighten ground screw on the body.

    Refer to "GROUND INSPECTION ".

    Fig 1: Location Of Washer Tank, Fuse And Fusible Link Box And Body Ground E15
    G07144205Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 2.

    NG: Repair or replace ground connections.

  2. CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
    1. Disconnect "fuel level sensor unit and fuel pump" harness connector (1).
      • : Vehicle front
    2. Turn ignition switch ON.
      Fig 2: Location Of Fuel Level Sensor Unit And Fuel Pump Harness Connector
      G07144206Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between "fuel level sensor unit and fuel pump" terminal 4 and ground with CONSULT-III or tester.

    Voltage: Approximately 5 V 

    Fig 3: Checking Voltage Between Fuel Level Sensor Unit And Fuel Pump Terminal 4 And Ground
    G07144207Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

  3. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B9, E13
    • Harness for open or short to ground or short between ECM and "fuel level sensor unit and fuel pump"

    Repair open circuit or short to ground or short to power in harness or connector.

  4. CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect combination meter harness connector.
    3. Check harness continuity between "fuel level sensor unit and fuel pump" terminal 5 and combination meter terminal 4, ECM terminal 104. Refer to WIRING DIAGRAM .

      Continuity should exist  .

    4. Also check harness for short to ground and short to power.

    OK or NG 

    OK: GO TO  6.

    NG: GO TO 5.

  5. DETECT MALFUNCTIONING PART

    Check the following.

    • Harness connectors B8, M8
    • Harness connectors B9, E13
    • Harness for open or short between "fuel level sensor unit and fuel pump" and combination meter
    • Harness for open or short between "fuel level sensor unit and fuel pump" and ECM

    Repair open circuit or short to ground or short to power in harness or connector.

  6. CHECK FUEL TANK TEMPERATURE SENSOR

    Refer to, "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO 7.

    NG: Replace "fuel level sensor unit and fuel pump". Refer to "REMOVAL AND INSTALLATION ".

  7. CHECK INTERMITTENT INCIDENT

Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

INSPECTION END 

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