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Home >> Subaru >> 2013 >> Forester X, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DO) >> Crankshaft Position Sensor >> Inspection >> Crankshaft Position Sensor (Method With Oscilloscope)
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Crankshaft Position Sensor (Method With Oscilloscope)

  1. Prepare an oscilloscope.
  2. Remove the glove box lower cover. < Refer to REMOVAL , Glove Box. >
  3. Remove the lower inner trim of passenger's side. < Refer to REMOVAL , Lower Inner Trim. >
  4. Turn over the floor mat of passenger's seat.
  5. Remove the protect cover.
    Fig 1: Locating Protect Cover Screws
    G08562560Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the nuts and bolts which hold the ECM to the bracket.
    Fig 2: Locating ECM Mounting Nuts And Bolts
    G08562561Courtesy of SUBARU OF AMERICA, INC.
  7. Connect the probe to ECM connector.
    Fig 3: Connecting Probe To ECM Connector Terminals
    G08562626Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    17 +
    25 -
  8. Start the engine and let it idle.
  9. Check the pattern is the same as the waveform and voltage shown below.
    Fig 4: Crankshaft Position Sensor Output Waveform
    G08562627Courtesy of SUBARU OF AMERICA, INC.
  10. After inspection, install the related parts in the reverse order of removal.

    Tightening torque: 

    7.5 N.m (0.8 kgf-m, 5.5 ft-lb) 

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