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Home >> Infiniti >> 2012 >> M35h >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0171 To P0463 >> DTC P0461: Fuel Level Sensor >> Component Function Check
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Component Function Check

  1. PRECONDITIONING
    WARNING: When performing the following procedure, always observe the handling of the fuel. Refer to "REMOVAL AND INSTALLATION ".

    TESTING CONDITION: Before starting component function check, preparation of draining fuel and refilling fuel is required  .

    Do you have CONSULT? 

    YES: GO TO 2.

    NO: GO TO  3.

  2. PERFORM COMPONENT FUNCTION CHECK

    ◦ With CONSULT 

    NOTE: Start from step  10, if it is possible to confirm that the fuel cannot be drained by 30 l  (7-7/8 US gal, 6-5/8 Imp gal) in advance.
    1. Prepare a fuel container and a spare hose.
    2. Release fuel pressure from fuel line, refer to "WORK PROCEDURE ".
    3. Remove the fuel feed hose on the fuel level sensor unit. Refer to "EXPLODED VIEW ".
    4. Connect a spare fuel hose where the fuel feed hose was removed.
    5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
    6. Select "FUEL LEVEL SE" in "DATA MONITOR" mode of "ENGINE" with CONSULT.
    7. Check "FUEL LEVEL SE" output voltage and note it.
    8. Select "FUEL PUMP RELAY" in "ACTIVE TEST" mode of "ENGINE" with CONSULT.
    9. Touch "ON" and drain fuel approximately 30 l  (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
    10. Check "FUEL LEVEL SE" output voltage and note it.
    11. Fill fuel into the fuel tank for 30 l  (7-7/8 US gal, 6-5/8 Imp gal).
    12. Check "FUEL LEVEL SE" output voltage and note it.
    13. Confirm whether the voltage changes more than 0.03V during step  7 to  10 and  10 to  12.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Go to "DIAGNOSIS PROCEDURE ".

  3. PERFORM COMPONENT FUNCTION CHECK

    ⓧ Without CONSULT 

    NOTE: Start from step  8, if it is possible to confirm that the fuel cannot be drained by 30 l  (7-7/8 US gal, 6-5/8 Imp gal) in advance.
    1. Prepare a fuel container and a spare hose.
    2. Release fuel pressure from fuel line. Refer to "WORK PROCEDURE ".
    3. Remove the fuel feed hose on the fuel level sensor unit. Refer to "EXPLODED VIEW ".
    4. Connect a spare fuel hose where the fuel feed hose was removed.
    5. Turn ignition switch ON.
    6. Drain fuel by 30 l  (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
    7. Confirm that the fuel gauge indication varies.
    8. Fill fuel into the fuel tank for 30 l  (7-7/8 US gal, 6-5/8 Imp gal).
    9. Confirm that the fuel gauge indication varies.

      Is the inspection result normal? 

      YES: INSPECTION END

      NO: Go to "DIAGNOSIS PROCEDURE ".

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