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Home >> Subaru >> 2018 >> Crosstrek Base, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel System >> Crankshaft Position Sensor >> Inspection >> Crankshaft Position Sensor
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Crankshaft Position Sensor

  1. Disconnect the ground cable from battery. Ref. to REPAIR CONTENTS>NOTE>BATTERY .
  2. Prepare an oscilloscope.
  3. Disconnect the connector from ECM in numerical order as shown in the figure.
    G11252779Courtesy 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>PREPARATION TOOL>HOW TO USE CHECK BOARD .

    Special tool: 

    CHECK BOARD (18460AA120) 

  5. Connect the probe to ST.
    G11252882Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    (E158) No. 66 +
    (B134) No. 69 -
  6. Start the engine and let it idle.
  7. Check the waveforms and voltage.
    NOTE: For waveform and voltage, refer to "Control Module (ECM) I/O Signal". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>Control Module I/O Signal>ELECTRICAL SPECIFICATION .
  8. After inspection, install the related parts in the reverse order of removal.
    NOTE: For installation procedures of ECM connectors, refer to Engine Control Module (ECM). Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO)>Engine Control Module (ECM)>INSTALLATION .
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