Crankshaft Position Sensor

Disconnect the ground terminal from battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
Prepare an oscilloscope.
Disconnect the connector from ECM. Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>ENGINE CONTROL MODULE (ECM)>REMOVAL .
Attach the ST between the ECM, engine wiring harness and the bulkhead wiring harness.
2.0 L model:

Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

2.5 L model:

Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .

Special tool:

CHECK BOARD (18460AA180)

Connect the probe to ST.

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Probe
(E158) No. 66	+
(B134) No. 69

Connect the ground terminal to battery sensor. Ref. to REPAIR CONTENTS>REPAIR CONTENTS>NOTE>BATTERY .
Start the engine and let it idle.
Check the waveforms and voltage.
NOTE: For waveform and voltage, refer to "Control Module (ECM) I/O Signal".

2.0 L model:

Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.0 (EXCEPT FOR HEV))>CONTROL MODULE I/O SIGNAL>ELECTRICAL SPECIFICATION .

2.5 L model:

Ref. to ENGINE (DIAGNOSTICS) (H4DO 2.5)>CONTROL MODULE I/O SIGNAL>ELECTRICAL SPECIFICATION .
After inspection, install the related parts in the reverse order of removal.
NOTE: For installation procedures of ECM connectors, refer to Engine Control Module (ECM). Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DO (EXCEPT FOR HEV))>ENGINE CONTROL MODULE (ECM)>INSTALLATION .