Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001GYS8
Model Year Start: 2020 Model: Corolla Hatchback Prod Date Range: [01/2019 - 11/2022]
Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: INITIALIZATION; 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]

INITIALIZATION

NOTICE:

  • Performing Reset Memory will clear the learned values of the yaw rate and acceleration sensor (Deceleration Sensor Zero Point Calibration) and the CVT oil pressure (CVT Oil Pressure Calibration). Make sure to perform Reset Memory, Deceleration Sensor Zero Point Calibration, and CVT Oil Pressure Calibration if any of the parts in the following table have been replaced.

    Replaced Part
    • Continuously variable transaxle assembly
    • ECM
    • Oil pressure sensor
    • Airbag sensor assembly (Yaw rate and acceleration sensor)
  • After performing Reset Memory, always perform Deceleration Sensor Zero Point Calibration first, and then CVT Oil Pressure Calibration.

PERFORM RESET MEMORY

(a) Move the shift lever to P and apply the parking brake.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

NOTICE:

Do not start the engine.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine and ECT / Utility / Reset Memory.

Powertrain > Engine and ECT > Utility

Tester Display

Reset Memory

NOTICE:

  • Make sure that the shift lever is in P.
  • Make sure that the engine is stopped. To prevent vibrations, do not start the engine.
  • Make sure that the ignition switch is ON.

PERFORM DECELERATION SENSOR ZERO CALIBRATION

(a) Turn the ignition switch to ON and wait at least 2 seconds.

(b) Enter the following menus: Powertrain / Engine and ECT / Utility / Deceleration Sensor Zero Point Calibration.

Powertrain > Engine and ECT > Utility

Tester Display

Deceleration Sensor Zero Point Calibration

NOTICE:

Keep the vehicle stopped, level and stable during calibration (Inclination: 0 +/- 0.25°).

HINT:

  • When "Complete" is displayed on the screen, Deceleration Sensor Zero Point Calibration is complete.
  • If "Error" is displayed on the screen and DTC P1589 is output, there may be a malfunction in the airbag sensor assembly (yaw rate and acceleration sensor) circuit.

    Click here 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P1589; Acceleration Sensor Learning Value

  • Shaking or vibrating the vehicle during Deceleration Sensor Zero Point Calibration may cancel calibration. If "Error" is displayed on the screen and DTC P1589 is not output, perform calibration again.

PERFORM CVT OIL PRESSURE CALIBRATION

(a) Turn the ignition switch off and wait at least 30 seconds.

(b) Turn the ignition switch to ON and wait at least 2 seconds.

NOTICE:

Do not start the engine.

HINT:

CVT Oil Pressure Sensor Zero Point Calibration is performed when the ignition switch is turned to ON (engine stopped). However, CVT Oil Pressure Sensor Zero Point Calibration will not be performed under the following conditions:

  • Oil pressure sensor value is 0.065 MPa (0.663 kgf/cm2, 9.43 psi) or more.
  • CVT oil temperature is 0°C (32°F) or less or 120°C (248°F) or more.

(c) Start the engine and wait at least 5 seconds.

(d) Enter the following menus: Powertrain / Engine and ECT / Utility / CVT Oil Pressure Calibration.

Powertrain > Engine and ECT > Utility

Tester Display

CVT Oil Pressure Calibration

HINT:

  • During CVT Oil Pressure Calibration, the engine idle speed will increase.
  • When "Complete" is displayed on the screen, CVT Oil Pressure Calibration is complete.
  • The learned values cannot be cleared by only disconnecting and reconnecting the cable to the negative (-) battery terminal.

PERFORM ATF THERMAL DEGRADATION ESTIMATE RESET

NOTICE:

If either of the following conditions is met, perform ATF Thermal Degradation Estimate Reset.

  • The CVT fluid has been replaced.

    HINT:

    If 50000 or more is displayed for the Data List item "ATF Thermal Degradation Estimate", thermal degradation of the CVT fluid is suspected. Perform ATF Thermal Degradation Estimate Reset after replacing the CVT fluid.

  • Approximately 50% or more of the CVT fluid has been replaced during a repair of the transaxle or a similar operation.

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) With the shift lever in P, turn the ignition switch to ON.

NOTICE:

Do not start the engine.

(d) Turn the Techstream on.

(e) Enter the following menu: Powertrain / Engine and ECT / Utility / ATF Thermal Degradation Estimate Reset.

Powertrain > Engine and ECT > Utility

Tester Display

ATF Thermal Degradation Estimate Reset

(f) According to the display on the Techstream, initialize the estimated thermal degradation value.