Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM100000001H79F
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2019]
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): CALIBRATION; 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]

CALIBRATION

POWER STEERING ECU INITIAL SETTING (TORQUE SENSOR ZERO POINT CALIBRATION AND ASSIST MAP WRITING) (USING TECHSTREAM)

NOTICE:

If any of the following conditions are met, perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing):

  • The power steering ECU with motor assembly has been replaced.
  • The electric power steering column sub-assembly has been replaced.
  • There is a difference in steering effort between turning left and right.

(a) Perform Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing).

(1) Align the front wheels straight ahead and center the steering wheel.

(2) Turn the ignition switch off.

(3) Connect the Techstream to the DLC3.

(4) Turn the ignition switch to ON.

(5) Turn the Techstream on.

(6) Enter the following menus: Chassis / EMPS / Utility / Power Steering ECU Initial Setting.

Chassis > EMPS > Utility

Tester Display

Power Steering ECU Initial Setting

NOTICE:

  • Do not turn the steering wheel sharply.
  • During the torque sensor zero point calibration the steering wheel will shudder. Do not touch the steering wheel until at least 3 seconds have elapsed after the shuddering has stopped.

(7) Check for RoBs.

Click here 2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): VEHICLE CONTROL HISTORY 2020 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): VEHICLE CONTROL HISTORY

Chassis > EMPS > Utility

Tester Display

Vehicle Control History (RoB)

NOTICE:

When Power Steering ECU Initial Setting (torque sensor zero point calibration and assist map writing) are completed, make sure to check for vehicle control history (RoB).