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Home >> Subaru >> 2012 >> Legacy Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection Fuel Systems (H4SO) >> Camshaft Position Sensor >> Inspection >> Camshaft Position Sensor (Method With Oscilloscope)
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Camshaft Position Sensor (Method With Oscilloscope)

  1. Prepare an oscilloscope.
  2. Remove the glove box lid assembly. Refer to GLOVE BOX .
  3. Connect the probe to ECM connector.
    Fig 1: Locating Glove Box Lid Assembly
    G06648245Courtesy of SUBARU OF AMERICA, INC.
    Fig 2: Connecting Probe To ECM Connector
    G07909676Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    24 +
    30 -
  4. Start the engine and let it idle.
  5. Check the pattern is the same as the waveform and voltage shown below.
    Fig 3: Camshaft Position Sensor Waveform
    G07909677Courtesy of SUBARU OF AMERICA, INC.
  6. After inspection, install the related parts in the reverse order of removal.