Subaru Legacy BN/BS (2015-2019) Service Manual: Inspection

Subaru Legacy BN/BS (2015-2019) Service Manual / Fuel injection (fuel systems)(h4do) / Crankshaft position sensor / Inspection

1. CRANKSHAFT POSITION SENSOR

1. Disconnect the ground terminal from battery sensor. NOTE

2. Prepare an oscilloscope.

3. While pressing the section (A) shown in the figure, move the lock lever (B) in the direction of the arrow to disconnect the connectors from the ECM in numerical order as shown in the figure.

4. Attach the ST between the ECM, engine harness and the bulkhead wiring harness. General Description > CAUTION

ST 18460AA050

CHECK BOARD

5. Connect the probe to ST.

(A)

To the check board connector (ECM connector)

Terminal No.	Probe
40	+
27	−

6. Start the engine and let it idle.

7. Check the waveforms and voltage.

NOTE:

For waveform and voltage, refer to “Engine Control Module (ECM) I/O Signal”. Engine Control Module (ECM) I/O Signal > ELECTRICAL SPECIFICATION

8. After inspection, install the related parts in the reverse order of removal.

2. OTHER INSPECTIONS

Check that the crankshaft position sensor has no deformation, cracks or other damages.

Removal

1. Disconnect the ground terminal from battery sensor. NOTE2. Remove the clip (A), and loosen the clamps (B) and (C) securing the air intake boot.3. Remove the air intake boot from the air cleaner ca ...

Installation

1. Install the crankshaft position sensor to the cylinder block, and connect the connector to the crankshaft position sensor.Tightening torque:6.4 N·m (0.7 kgf-m, 4.7 ft-lb)2. Install the air i ...

Other materials:

General precautions when starting/stopping engine
WARNING Never start the engine from outside the vehicle (except when using the remote engine start system). It may result in an accident. Do not leave the engine running in locations with poor ventilation, such as a garage and indoors. The exhau ...