Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001OEJW
Model Year Start: 2021 Model: GR Corolla Prod Date Range: [04/2020 - 06/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): PROBLEM SYMPTOMS TABLE; 2021 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 06/2021]

PROBLEM SYMPTOMS TABLE

HINT:

  • If a problem occurs in certain locations or at certain times of day, check for the possibility of wave interference.
  • When the electrical key transmitter sub-assembly is brought near a door control receiver (RF band), door outside handle assembly (LF band), indoor electrical key antenna (LF band) or any of the electrical key antennas (LF band), the possibility of wave interference decreases. By doing this, whether wave interference is causing the problem can be checked.
  • 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.

Smart Key System (for Entry Function)

Symptom

Suspected Area

Link

Key vehicle inside lock-in prevention function does not operate

Affected by wave interference

2021 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 06/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): Power Source Mode does not Change to ON (IG and ACC)

Harness or connector

No. 1 indoor electrical key antenna assembly (front floor)

No. 2 indoor electrical key antenna assembly (rear floor)*3

No. 3 indoor electrical key antenna assembly (inside luggage compartment)

Certification ECU (Smart Key ECU Assembly)

Transmitter battery

Instrument panel junction block assembly

Engine switch

All door entry lock/unlock functions and wireless functions do not operate

Lighting system

2021 MY Corolla Corolla Hatchback GR Corolla [04/2020 - 06/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

Power door lock control system

Affected by wave interference

Code registration

Transmitter battery

Harness or connector

Electrical key transmitter sub-assembly

Door control receiver

Main body ECU (Multiplex network body ECU)

Certification ECU (Smart Key ECU Assembly)

All door entry lock/unlock functions do not operate, but wireless functions operate

Check customize setting (Entry cancel function)

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate

Affected by wave interference

Electrical key transmitter sub-assembly

Certification ECU (Smart Key ECU Assembly)

Driver side door entry unlock function does not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Driver Side Door Entry Unlock Function does not Operate

Harness or connector

Front door outside handle assembly (for driver door)

Lighting system

Certification ECU (Smart Key ECU Assembly)

Front passenger side door entry unlock function does not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Front Passenger Side Door Entry Unlock Function does not Operate

Harness or connector

Front door outside handle assembly (for front passenger door)

Lighting system

Certification ECU (Smart Key ECU Assembly)

Driver side door entry lock and unlock functions do not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Driver Side Door Entry Lock and Unlock Functions do not Operate

Affected by wave interference

Harness or connector

Front door outside handle assembly (for driver door)

Certification ECU (Smart Key ECU Assembly)

Front passenger side door entry lock and unlock functions do not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Front Passenger Side Door Entry Lock and Unlock Functions do not Operate

Affected by wave interference

Harness or connector

Front door outside handle assembly (for front passenger door)

Certification ECU (Smart Key ECU Assembly)

Driver side door entry lock function does not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Driver Side Door Entry Lock Function does not Operate

Harness or connector

Front door outside handle assembly (for driver door)

Certification ECU (Smart Key ECU Assembly)

Front passenger side door entry lock function does not operate

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Front Passenger Side Door Entry Lock Function does not Operate

Harness or connector

Front door outside handle assembly (for front passenger door)

Certification ECU (Smart Key ECU Assembly)

Entry interior alarm does not sound

Meter/gauge System

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Entry Interior Alarm does not Sound

CAN communication System

Back door entry unlock function does not operate (except Sedan)

Check customize setting (B-Dr Opening Operation)

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Back Door Entry Unlock Function does not Operate

Power door lock control system

Harness or connector

Back door opener switch sub-assembly

Certification ECU (Smart Key ECU Assembly)

Back door entry lock and unlock function does not operate (except Sedan)

Power door lock control system

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [03/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Back Door Entry Lock and Unlock Functions do not Operate

Affected by wave interference

Harness or connector

Back door opener switch sub-assembly

Electrical key antenna (outside luggage compartment)

Certification ECU (Smart Key ECU Assembly)

Back door entry lock function does not operate (except Sedan)

Power door lock control system

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Back Door Entry Lock Function does not Operate

Harness or connector

Back door opener switch sub-assembly

Certification ECU (Smart Key ECU Assembly)

Luggage compartment door entry unlock function does not operate when key is outside luggage compartment (for Sedan)

Check customize setting (Trunk Open Mode)

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Luggage Compartment Door Entry Unlock Function does not Operate when Key is Outside Luggage Compartment

Affected by wave interference

Power door lock control system

Harness or connector

Luggage electrical key switch

Electrical key antenna (outside luggage compartment)

Certification ECU (smart key ECU assembly)

Key luggage compartment lock-in prevention function does not operate (for Sedan)

Affected by wave interference

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Key Luggage Compartment Lock-in Prevention Function does not Operate

Harness or connector

No. 3 indoor electrical key antenna assembly (inside luggage compartment)

Certification ECU (smart key ECU assembly)

Entry exterior alarm and answer-back buzzer do not sound

Check customize setting (Wireless Buzzer Resp)

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Entry Exterior Alarm and Answer-back Buzzer do not Sound

Lighting system

Harness or connector

Wireless door lock buzzer

Certification ECU (Smart Key ECU Assembly)

Touching unlock sensor for certain period of time does not unlock all doors

Check customize setting (Door Unlock Mode 2 and Door Unlock Sensor Touch Time Adjust)

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function, Gasoline Model): Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors

Front door outside handle assembly (for driver door)

Certification ECU (Smart Key ECU Assembly)

When returning to the vehicle, although door unlock operation was not performed, doors were in an unlocked state

Power door lock control system*1

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Hatchback, Gasoline Model): Improper Operation

Power door lock control system*2

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, Gasoline Model): Improper Operation

When returning to the vehicle, although door lock operation was not performed, doors were in a locked state

Power door lock control system*1

2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Hatchback, Gasoline Model): Improper Operation

Power door lock control system*2

2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]; DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, Gasoline Model): Improper Operation

  • *1: except Sedan
  • *2: for Sedan
  • *3: for Hatchback