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Home >> Subaru >> 2009 >> Impreza WRX, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DOTC) >> Fuel Level Sensor >> Inspection
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Fuel Level Sensor: Inspection

NOTE: When inspecting the fuel level sensor, perform the work with it installed to the fuel pump.
  1. Measure the fuel level sensor float position.
    Fig 1: Measuring Fuel Level Sensor Float Position
    G06351453Courtesy of SUBARU OF AMERICA, INC.
    FLOAT POSITION CHART

    Float position Standard
    FULL to Fuel tank seating surface (A) 135 ±4 mm (5.315±0.157 in)
    EMPTY to Fuel tank seating surface (B) 23.7 ±4 mm (0.933±0.157 in)
  2. Measure the resistance between fuel level sensor terminals.
Fig 2: Measuring Resistance Between Fuel Level Sensor Terminals
G06344819Courtesy of SUBARU OF AMERICA, INC.
FLOAT POSITION CHART

Float position Terminal No. Standard
FULL (A) 1 and 4 2.0±1.0 Ω
EMPTY (B) 31.9±1.0 Ω