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Home >> Subaru >> 2020 >> Legacy Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel Injection System (2.5L) >> Crankshaft Position Sensor >> Inspection >> Crankshaft Position Sensor
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Crankshaft Position Sensor

  1. Disconnect the ground terminal from battery sensor. Refer to REPAIR CONTENTS>NOTE>BATTERY .
  2. Prepare an oscilloscope.
  3. Disconnect the connector from ECM. Refer to Fuel Injection (Fuel Systems) (H4DO)>Engine Control Module (ECM)>REMOVAL .
  4. Attach the ST between the ECM, engine wiring harness and the bulkhead wiring harness. Refer to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

    Special tool: 

    CHECK BOARD (18460AA180)

  5. Connect the probe to ST.
    G13618485Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Probe
    (E53) No. 66 +
    (B62) No. 69 -
  6. Connect the ground terminal to battery sensor. Refer to REPAIR CONTENTS>NOTE>BATTERY .
  7. Start the engine and let it idle.
  8. Check the waveforms and voltage.
    NOTE: For waveform and voltage, refer to ENGINE (DIAGNOSTICS) (H4DO)>CONTROL MODULE I/O SIGNAL .
  9. After inspection, install the related parts in the reverse order of removal.
    NOTE: For installation procedures of ECM connectors, refer to Fuel Injection (Fuel Systems) (H4DO)>Engine Control Module (ECM)>INSTALLATION .
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