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Home › Subaru › 2018 › Forester 2.5i Touring › Repair and Diagnosis › Engine Performance › Fuel Delivery › Engine Control/Fuel Injection System (H4DO) › Camshaft Position Sensor › Inspection › Camshaft Position Sensor

Camshaft Position Sensor

  1. Disconnect the ground terminal from battery sensor. Ref. to NOTE>NOTE>BATTERY .
  2. Prepare an oscilloscope.
  3. Remove the ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Engine Control Module (ECM)>REMOVAL .
  4. Attach the ST between the ECM and bulkhead wiring harness. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>General Description>CAUTION .

    ST 18460AA050 CHECK BOARD 

  5. Connect the probe to ST.
    G12505371Courtesy of SUBARU OF AMERICA, INC.
    Camshaft position sensor Terminal No. Probe
    RH 54 +
    LH 41 +
    RH and LH 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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