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Home >> Subaru >> 2014 >> Outback 2.5i, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (H4DO) >> 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 back panel - pocket. Refer to REMOVAL .
  3. Connect the probe to ECM connector.
    Fig 1: Identifying ECM Harness Connectors
    G08579610Courtesy of SUBARU OF AMERICA, INC.
    Fig 2: Measuring Voltage Between ECM Connector Terminals
    G08579674Courtesy of SUBARU OF AMERICA, INC.
    Camshaft position sensor Terminal No. Probe
    RH 26 +
    LH 15 +
    RH and LH 34 -
  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
    G08579675Courtesy of SUBARU OF AMERICA, INC.
  6. After inspection, install the related parts in the reverse order of removal.
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