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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis >> Transmission >> Automatic Trans >> CVT Transaxle System >> Variator Chain Break-in >> Procedure
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Variator Chain Break-in: Procedure

CAUTION:
  • When replacing the variator chain, primary pulley and secondary pulley, perform the variator chain break-in.
  • Do not turn the power of the Subaru Select Monitor OFF during work, and do not disconnect the data link connector.
NOTE:
  • During variator chain break-in, VDC warning light illuminate because of the difference between the vehicle speed value and G sensor value. This is not a malfunction.
  • If the warning light illuminates, clear the VDC memory after the variator chain break-in is finished. Ref. to COMMON (diag)>Clear memory>OPERATION .
  • If the above malfunction code is detected during variator chain break-in, the system enters into fail-safe mode, and the vehicle shows symptom such as engine speed rapid increases even if the accelerator pedal is gradually depressed.
  1. Lift up the vehicle.
    CAUTION:
    • Lift up the vehicle until the tire bottom is 0.3 m (0.98 ft) or more above the ground.
    • Make sure that safety is secured where the tiers rotate.
  2. Connect the Subaru Select Monitor.
  3. Turn the ignition switch to ON. (Engine OFF)
  4. Display [ATF Temp.].
  5. Apply the parking brake.
  6. Start the engine.
  7. Raise [ATF Temp.] to 40 - 50°C (104 - 122°F).
    NOTE: When the [ATF Temp.] does not rise easily or if you want to rise the [ATF Temp.] faster, maintain the engine speed within 2, 000 - 2, 500 r/min at "P range" or "N range" to raise the [ATF Temp.].
  8. With the select lever in "P" range, increase the engine speed to 3, 000 - 3, 500 r/min, and maintain the speed for approximately five seconds, then release the accelerator pedal.
  9. Depress the accelerator pedal gradually again to increase the engine speed to 3, 000 - 3, 500 r/min, maintain the speed for approximately five seconds, then release the accelerator pedal.
  10. Release the parking brake.
  11. Shift the select lever into manual mode and set to 1st.
  12. Depress the accelerator pedal gradually, and increase the engine speed to 5, 300 r/min.
    NOTE: Increase the engine speed while taking care that the engine speed does not become too high.
  13. Release the accelerator pedal to fully closed position to lower the engine speed to 4, 000 r/min.
  14. Depress the accelerator pedal gradually again, and increase the engine speed to 5, 300 r/min.
  15. Repeat procedures 13 and 14 for 40 times.
  16. Release the accelerator pedal.
  17. Depress the brake pedal to stop the tire rotation.
  18. Shift the select lever to "P range", and then turn the engine to OFF.
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