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Primary Speed Sensor: Inspection

  1. Remove the instrument panel lower cover. Ref. to REMOVAL , Instrument Panel Lower Cover.
  2. Set the probe of oscilloscope to TCM harness connector.
    Fig 1: TCM Harness Connector Terminal Identification
    G06654441Courtesy of SUBARU OF AMERICA, INC.
  3. Start and warm up the engine.
  4. Check the waveform of primary speed sensor with engine idling.
    Fig 2: Identifying Signal Waveform
    G06654442Courtesy of SUBARU OF AMERICA, INC.
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