Front Wheel Speed Sensor: Inspection

WARNING: This page is about a different car, the 2019 Subaru Ascent. However, it is still accessible from the selected car via links, so may be relevant.

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

No. 12 (+) - No. 26 (-):

Courtesy of SUBARU OF AMERICA, INC.
Lift up the vehicle and raise the vehicle speed up to 20 km/h (12 MPH).
Check the waveform of front wheel speed sensor when vehicle speed is at 20 km/h (12 MPH).
NOTE: The waveform cycle changes as the speed changes.

Courtesy of SUBARU OF AMERICA, INC.