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Home >> Subaru >> 2013 >> Impreza Base, 4D Sedan, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (Except WRX) >> Camshaft Position Sensor >> Inspection >> Camshaft Position Sensor (Method With Oscilloscope)

Camshaft Position Sensor (Method With Oscilloscope)

  1. Prepare an oscilloscope.
  2. Remove the back panel - pocket. < Refer to REMOVAL , Glove Box. >
  3. Connect the probe to ECM connector.
    Fig 1: Identifying ECM Connectors
    G08315329Courtesy of SUBARU OF AMERICA, INC.
    Fig 2: Connecting Probe To ECM Connector
    G08547387Courtesy of SUBARU OF AMERICA, INC.
    Camshaft position sensor Terminal No. Probe
    RH 24 +
    LH 16 +
    RH and LH 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 Output Waveform
    G08547388Courtesy of SUBARU OF AMERICA, INC.
  6. After inspection, install the related parts in the reverse order of removal.
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