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Home >> Subaru >> 2014 >> Tribeca >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System >> 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. Disconnect the ground cable from battery.
  3. Remove the front pillar lower trim and console side panel lower RH of passenger's side.
  4. Detach the floor mat of passenger's seat.
  5. Remove the protect cover.
    Fig 1: Locating Protect Cover Mounting Screws
    G05016849Courtesy of SUBARU OF AMERICA, INC.
  6. Remove the ECM from vehicle.
    Fig 2: Locating ECM Mounting Bolts
    G05031074Courtesy of SUBARU OF AMERICA, INC.
  7. Connect the probe to ECM connector.
    • Intake camshaft position sensor
      Fig 3: Connecting Probe To ECM Connector Terminals (Intake Camshaft Position Sensor)
      G08543925Courtesy of SUBARU OF AMERICA, INC.
      Camshaft position sensor Terminal No. Probe
      RH 24 +
      LH 16 +
      RH and LH 30 -
    • Exhaust camshaft position sensor
      Fig 4: Connecting Probe To ECM Connector Terminals (Exhaust Camshaft Position Sensor)
      G08543926Courtesy of SUBARU OF AMERICA, INC.
      Camshaft position sensor Terminal No. Probe
      RH 23 +
      LH 29 +
      RH and LH 30 -
  8. Start the engine and let it idle.
  9. Check the pattern is the same as the waveform and voltage shown below.
    Fig 5: Display - Camshaft Position Sensor Output Waveform
    G08543927Courtesy 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)