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Home >> Subaru >> 2013 >> Legacy R >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H6DO) >> 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 REMOVAL .
  3. Connect the probe to ECM connector.
    • Intake camshaft position sensor
      Fig 1: Measuring Resistance Between Crankshaft Position Sensor Terminals (Method With Oscilloscope)
      G08580977Courtesy of SUBARU OF AMERICA, INC.
      Camshaft position sensor Terminal No. Probe
      RH 24 +
      LH 16 +
      RH and LH 30 -
    • Exhaust camshaft position sensor
      Fig 2: Measuring Resistance Between Exhaust Crankshaft Position Sensor Terminals
      G08580978Courtesy of SUBARU OF AMERICA, INC.
      Camshaft position sensor Terminal No. Probe
      RH 23 +
      LH 29 +
      RH and LH 30 -
  4. Start the engine and let it idle.
  5. Check that the pattern is the same as the waveform and voltage shown below.
    Fig 3: Exhaust Crankshaft Position Sensor Single Rotation Waveform Pattern
    G08580979Courtesy of SUBARU OF AMERICA, INC.
  6. After inspection, install the related parts in the reverse order of removal.
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