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Primary Speed Sensor: Inspection

  1. Remove the bulkhead wiring harness connector from TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION CONTROL MODULE (TCM)>REMOVAL .
  2. Set the ST (CHECK BOARD) between the TCM and bulkhead wiring harness.
  3. Set the probe of oscilloscope to the check board connector.

    Terminals: 

    No. 14 (+) - No. 42 (-):

    G13200042Courtesy of SUBARU OF AMERICA, INC.
  4. Start and warm up the engine.
  5. Check the waveform of primary speed sensor with the engine idling.
    NOTE: The waveform cycle changes as the speed changes.
    G09482009Courtesy of SUBARU OF AMERICA, INC.
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