Primary Speed Sensor: Inspection

WARNING: This page is about a different variant/trim than selected.

Remove the bulkhead harness connector from TCM. Refer to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION CONTROL MODULE (TCM)>REMOVAL .
Set the ST between the TCM and bulkhead harness.

ST 18460AA040 CHECK BOARD
Set the probe of oscilloscope to the check board connector.
Terminals:

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

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Start and warm up the engine.
Check the waveform of primary speed sensor with engine idling.
NOTE: The waveform cycle changes as the speed changes.

Courtesy of SUBARU OF AMERICA, INC.