Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GWYX
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2019]
Title: STEERING COLUMN: STEERING SYSTEM: PROBLEM SYMPTOMS TABLE; 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2019]

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Steering System

Symptom

Suspected Area

Link

Heavy steering

Front tires (improperly inflated, unevenly worn)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION

Front wheel alignment (incorrect)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; ALIGNMENT / HANDLING DIAGNOSIS: FRONT WHEEL ALIGNMENT: ADJUSTMENT 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; ALIGNMENT / HANDLING DIAGNOSIS: FRONT WHEEL ALIGNMENT: ADJUSTMENT

Front suspension (Lower ball joint)

2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; FRONT SUSPENSION: FRONT LOWER BALL JOINT: ON-VEHICLE INSPECTION

Steering gear assembly

2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL

Battery and power source circuit

2019 - 2022 MY Corolla Corolla Hatchback [06/2018 - 09/2022]; M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION *1

2020 - 2022 MY Corolla [01/2019 - 09/2022]; 2ZR-FAE (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION *2

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; 2ZR-FXE (BATTERY / CHARGING): CHARGING SYSTEM: ON-VEHICLE INSPECTION *3

Power source voltage of power steering ECU assembly

2020 - 2021 MY Corolla Corolla HV [01/2019 - 06/2021]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): TERMINALS OF ECU *4

2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): TERMINALS OF ECU *5

2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): TERMINALS OF ECU *6

Power steering ECU with motor assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

Vehicle condition (Steering wheel is turned from left to right repeatedly with vehicle stopped or heavy load is continuously applied to vehicle)

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): DATA LIST / ACTIVE TEST *4

2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): DATA LIST / ACTIVE TEST *5

2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): DATA LIST / ACTIVE TEST *6

Steering effort differs between right and left or is uneven

Rotation angle sensor initialization and torque sensor zero point calibration incomplete

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for HV Model): CALIBRATION *4

2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Sedan)): CALIBRATION *5

2019 - 2020 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Gasoline Model (for Hatchback)): CALIBRATION *6

Front tires (improperly inflated, unevenly worn)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; TIRE / WHEEL: TIRE AND WHEEL SYSTEM: INSPECTION

Front wheel alignment (incorrect)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; ALIGNMENT / HANDLING DIAGNOSIS: FRONT WHEEL ALIGNMENT: ADJUSTMENT 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; ALIGNMENT / HANDLING DIAGNOSIS: FRONT WHEEL ALIGNMENT: ADJUSTMENT

Front suspension (Lower ball joint)

2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; FRONT SUSPENSION: FRONT LOWER BALL JOINT: ON-VEHICLE INSPECTION

Steering gear assembly

2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; STEERING GEAR / LINKAGE: STEERING GEAR: REMOVAL

Torque sensor (Electric power steering column sub-assembly)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL

Electric power steering column sub-assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL

Power steering ECU with motor assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

While driving, steering effort does not change in accordance with vehicle speed, or steering wheel does not return to its centered position easily

Skid control ECU assembly

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TERMINALS OF ECU *4

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): TERMINALS OF ECU *7

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): TERMINALS OF ECU *8

Speed sensor

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model): TEST MODE PROCEDURE *4

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model with Electric Parking Brake System): TEST MODE PROCEDURE *7

2020 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 03/2019]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): TEST MODE PROCEDURE 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model without Electric Parking Brake System): TEST MODE PROCEDURE *8

Torque sensor (Electric power steering column sub-assembly)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL

Power steering ECU with motor assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

CAN communication system

2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): HOW TO PROCEED WITH TROUBLESHOOTING *4

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING *9

Friction sounds occur when turning steering wheel during low speed driving

Power steering motor (Power steering ECU with motor assembly)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

Electric power steering column sub-assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL

Spiral cable with sensor sub-assembly

2019 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: INSPECTION

Steering column cover contacting steering wheel assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: INSTALLATION

High-pitched sound (squeaking) occurs when turning steering wheel slowly with vehicle stopped

Power steering motor (Power steering ECU with motor assembly)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

Steering wheel installation (incorrect)

2020 - 2025 MY Corolla Corolla Hatchback Corolla HV [01/2019 -        ]; STEERING COLUMN: STEERING WHEEL (except G16E-GTS): INSTALLATION

Steering wheel vibrates and noise occurs when turning steering wheel from lock to lock

Power steering motor (Power steering ECU with motor assembly)

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; POWER ASSIST SYSTEMS: POWER STEERING ECU: REMOVAL

Electric power steering column sub-assembly

2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2019]; STEERING COLUMN: STEERING COLUMN ASSEMBLY: REMOVAL

Steering wheel installation (incorrect)

2020 - 2025 MY Corolla Corolla Hatchback Corolla HV [01/2019 -        ]; STEERING COLUMN: STEERING WHEEL (except G16E-GTS): INSTALLATION

*1: for M20A-FKS

*2: for 2ZR-FAE

*3: for 2ZR-FXE

*4: for HV Model

*5: for Gasoline Model (for Sedan)

*6: for Gasoline Model (for Hatchback)

*7: for Gasoline Model with Electric Parking Brake System

*8: for Gasoline Model without Electric Parking Brake System

*9: for Gasoline Model