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Home >> Subaru >> 2018 >> Outback 2.5i >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel System (H4DO) >> Crankshaft Position Sensor >> Inspection >> Crankshaft Position Sensor
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Crankshaft Position Sensor

  1. Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>NOTE>BATTERY
  2. Prepare an oscilloscope.
  3. While pressing the section (A) shown in the figure, move the lock lever (B) in the direction of the arrow to disconnect the connectors from the ECM in numerical order as shown in the figure.
    G10262110Courtesy of SUBARU OF AMERICA, INC.
  4. Attach the ST between the ECM, engine wiring harness and the bulkhead wiring harness. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>CAUTION

    ST 18460AA050 CHECK BOARD 

  5. Connect the probe to ST.
    G12403293Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    40 +
    63 -
  6. Start the engine and let it idle.
  7. Check the waveforms and voltage.
    NOTE: For waveform and voltage, refer to "Engine Control Module (ECM) I/O Signal". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Engine Control Module (ECM) I/O Signal>ELECTRICAL SPECIFICATION
  8. After inspection, install the related parts in the reverse order of removal.
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