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Home >> Subaru >> 2016 >> WRX STI >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (WRX-STI) >> 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. < Ref. to REMOVAL , Glove Box. >
  3. Connect the probe to ECM connector.
    • Intake camshaft position sensor
      Fig 1: Connecting Probe To ECM Connector For Intake Camshaft Position Sensor
      G10264820Courtesy of SUBARU OF AMERICA, INC.

      (A) To ECM connector

    • Exhaust camshaft position sensor
      Fig 2: Connecting Probe To ECM Connector For Exhaust Camshaft Position Sensor
      G10289842Courtesy of SUBARU OF AMERICA, INC.

      (A) To ECM connector

      Camshaft position sensor Terminal No. Probe
      Intake RH 24 +
      LH 16 +
      Exhaust RH 23 +
      LH 29 +
      RH and LH 30 -
  4. Start the engine and let it idle.
  5. Check the waveforms and voltage.
    NOTE: For waveform and voltage, refer to "Engine Control Module (ECM) I/O Signal". < Ref. to ELECTRICAL SPECIFICATION , Engine Control Module (ECM) I/O Signal. >
  6. After inspection, install the related parts in the reverse order of removal.
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