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

Subaru Legacy BN/BS (2015-2019) Service Manual / Continuously variable transmission (diagnostics) / Learning control / Procedure

1. PREPARATION FOR LEARNING

1. Warm up or cool down until the ATF temperature displayed on the Subaru Select Monitor is 40 — 65°C (104 — 149°F).

2. After stopping the vehicle, shift the select lever to “P” range.

3. Apply the electronic parking brake.

4. Lift up the vehicle.

CAUTION:

While working, be sure to keep the lower edge of the tires 30 cm or more above the ground as vehicle will vibrate.

5. Connect the Subaru Select Monitor to data link connector.

6. Turn the ignition switch to ON.

7. Turn off all switches causing an electrical load, such as headlights, A/C, seat heater and rear defogger, etc.

2. SIMPLE LEARNING

NOTE:

Simple learning is performed with the vehicle lifted, without actually running the vehicle.

CAUTION:

Do not turn the power of the Subaru Select Monitor OFF during work, and do not disconnect the data link connector.

1. On «Start» display, select «Diagnosis».

2. On «Vehicle selection» display, input the vehicle information and select «Confirmed».

3. On «Main Menu» display, select «Each System Check».

4. On «Select System» display, select «Transmission Control System».

5. On «Select Function» display, select «Work Support».

6. On «Work Support» display, select «AT learning mode».

7. Follow the messages displayed on the screen when working.

NOTE:

During AT learning in progress, AT OIL TEMP light in the combination meter starts flashing at 2 Hz and the learning operation starts. When the AT OIL TEMP light which was flashing at 2 Hz goes off, the following message is displayed on the screen.

8. When «AT learning normally ended.» is displayed, simple AT learning is completed.

NOTE:

• If communication error occurs during learning, retry the “AT learning mode” from the beginning.

• If the message «Execute AT learning again after fixing troubles of the vehicle» appears during learning, select [OK] and display the DTC list. After repairing the locations indicated by the DTC, start the “AT learning mode” over from the beginning.

• When communication error occurs during learning, select lever does not shift occasionally. If select lever does not shift, turn the ignition switch to OFF before operating the select lever.

• If the message «AT learning ended abnormally. Try again from the beginning.» is displayed, start the “AT learning mode” over from the beginning.

Display

Main causes for abnormal termination

AT learning ended abnormally. Try again from the beginning.

• Fault is detected during AT learning.

• The accelerator pedal is depressed during AT learning.

• An unspecified operation was performed during AT learning

• ATF temperature becomes out of specification during AT learning.

• Battery voltage is low.

• Malfunction indicator light illuminates.

• Electric parking brake not applied strongly enough

• Brake pedal is not fully depressed.

• Abnormal idle speed increase, etc.

• For detailed operation procedures, refer to “Application help”.

General description

• Follow the messages displayed on the Subaru Select Monitor when working.• When the following work is performed, perform learning work for the transmission.Replacement of TCM/Replacement ...

Transmission control module (tcm) i o signal

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