Crankshaft Position Sensor (Method With Oscilloscope)

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Prepare an oscilloscope.
Remove the glove box lower cover. < Ref. to REMOVAL , Glove Box. >
Remove the lower inner trim of passenger's side. < Ref. to REMOVAL , Lower Inner Trim. >
Turn over the floor mat of passenger's seat.
Remove the protect cover.

Fig 1: Locating Protect Cover Nuts And Bolts
Courtesy of SUBARU OF AMERICA, INC.
Remove the nuts and bolts which hold the ECM to the bracket.

Fig 2: Locating ECM Bracket Nuts And Bolts
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Connect the probe to ECM connector.

Fig 3: Connecting Probe To ECM Connector

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ECM CONNECTOR TERMINAL REFERENCE CHART

Terminal No.	Probe
17	+
25	-

Start the engine and let it idle.
Check the pattern is the same as the waveform and voltage shown below.

Fig 4: Crankshaft Voltage Pattern Waveform
Courtesy of SUBARU OF AMERICA, INC.
After inspection, install the related parts in the reverse order of removal.
Tightening torque:

7.5 N.m (0.8 kgf-m, 5.5 ft-lb)