Crankshaft Position Sensor (Method With Oscilloscope)

Connect the probe to ECM connector.

Fig 1: Measuring Resistance Between Crankshaft Position Sensor Terminals (Method With Oscilloscope)

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Probe
17	+
25	-

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

Fig 2: Crankshaft Position Sensor Single Rotation Waveform Pattern
Courtesy of SUBARU OF AMERICA, INC.
After inspection, install the related parts in the reverse order of removal.