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

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission(tr580) / Turbine speed sensor / Inspection

1. Disconnect the ground terminal from battery sensor. NOTE

2. Remove the clip (A), and loosen the clamps (B) and (C).

3. Remove the air intake boot from the throttle body, and move it to the left side wheel apron.

4. Disconnect the transmission radio ground terminal and transmission harness connector, and remove the harness clip.

(A)	Transmission radio ground terminal
(B)	Transmission harness connectors
(C)	Harness clip

5. Remove the transmission case cover.

6. Move the lock lever in the arrow direction while pressing the lock button, and disconnect the connector.

(A)	Lock button

7. Set the ST between TCM and transmission harness. General Description > CAUTION

ST 18460AA040

CHECK BOARD

8. Connect the transmission radio ground terminal and transmission harness connector, and install the harness clip.

Tightening torque:

13 N·m (1.3 kgf-m, 9.6 ft-lb)

9. Install the air intake boot assembly. Air Intake Boot > INSTALLATION

10. Connect the ground terminal to battery sensor. NOTE

11. Set the probe of oscilloscope to the check board connector.

Connector & terminal:

(B54) No. 12 (+) — No. 26 (−):

(A)	+ probe
(B)	− probe

12. Start and warm up the engine.

13. Check the waveform and output voltage of the turbine speed sensor with engine idling.

NOTE:

The waveform cycle changes as the speed changes.

Removal

CAUTION:Be sure to prevent water or oil from contacting the connector terminal of turbine speed sensor. If adhesion occurs, replace with a new part.1. Disconnect the ground terminal from battery senso ...

Installation

CAUTION:Be sure to prevent water or oil from contacting the connector terminal of turbine speed sensor. If adhesion occurs, replace with a new part.1. Install the turbine speed sensor.NOTE:• Use ...

Other materials:

Inspection
1. Check the spark plug for abnormalities. If defective, replace the spark plug.(A)Terminal damage(B)Crack or damage in insulator(C)Damaged gasket2. Check the spark plug electrode and condition of the insulator. If abnormal, check and repair the cause and replace the spark plug.(1) Normal:Brown to g ...