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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Key System (For Entry) - Diagnostics - Introduction >> SMART KEY SYSTEM (for Entry Function) >> Problem Symptoms Table [11/2023 - ] >> Problem Symptoms Table [11/2023 - ]

Problem Symptoms Table [11/2023 - ]

HINT: 

SMART KEY SYSTEM (FOR ENTRY FUNCTION)

Symptom Suspected Area Link
Key vehicle inside lock-in prevention function does not operate Affected by wave interference for HV Model: Refer to Power Source Mode does not Change to ON (IG and ACC) [11/2023 - ]
for Gasoline Model: Refer to Power Source Mode does not Change to ON (IG and ACC) [11/2023 - ]
Harness or connector
No. 1 indoor electrical key antenna assembly (front floor)
No. 2 indoor electrical key antenna assembly (rear floor)
No. 3 indoor electrical key antenna assembly (inside luggage compartment)
Certification ECU (Smart key ECU assembly)
Transmitter battery
Power distribution box assembly
Power switch*1
Engine switch*2
Entry lock/unlock functions and wireless functions do not operate after new/additional key ID registration Code registration Refer to Entry Lock/Unlock Functions and Wireless Functions do not Operate After New/Additional Key ID Registration [11/2023 - ]
Main body ECU (Multiplex network body ECU)
Certification ECU (Smart key ECU assembly)
All door entry lock/unlock functions and wireless functions do not operate Lighting system (Int) Refer to All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [11/2023 - ]
Power door lock control system
Affected by wave interference
Code registration
Transmitter battery
Harness or connector
Electrical key transmitter sub-assembly
Electrical key and tire pressure monitoring system receiver assembly
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 Affected by wave interference Refer to All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate [11/2023 - ]
Electrical key transmitter sub-assembly
Certification ECU (Smart key ECU assembly)
Driver side door entry unlock function does not operate Lighting system (Int) Refer to Driver Side Door Entry Unlock Function does not Operate [11/2023 - ]
Power door lock control system
Harness or connector
Front door outside handle assembly (for driver door)
Certification ECU (Smart key ECU assembly)
Front passenger side door entry unlock function does not operate Lighting system (Int) Refer to Front Passenger Side Door Entry Unlock Function does not Operate [11/2023 - ]
Power door lock control system
Harness or connector
Front door outside handle assembly (for front passenger door)
Certification ECU (Smart key ECU assembly)
Driver side door entry lock and unlock functions do not operate Power door lock control system Refer to Driver Side Door Entry Lock and Unlock Functions do not Operate [11/2023 - ]
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 Refer to Front Passenger Side Door Entry Lock and Unlock Functions do not Operate [11/2023 - ]
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 Refer to Driver Side Door Entry Lock Function does not Operate [11/2023 - ]
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 Refer to Front Passenger Side Door Entry Lock Function does not Operate [11/2023 - ]
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 Refer to Entry Interior Alarm does not Sound [11/2023 - ]
Back door entry unlock function does not operate Power door lock control system Refer to Back Door Entry Unlock Function does not Operate [11/2023 - ]
Harness or connector
Back door opener switch assembly
Certification ECU (Smart key ECU assembly)
Back door entry lock and unlock function does not operate Power door lock control system Refer to Back Door Entry Lock and Unlock Functions do not Operate [11/2023 - ]
Affected by wave interference
Harness or connector
Back door opener switch assembly
Electrical key antenna (outside luggage compartment)
Certification ECU (Smart key ECU assembly)
Back door entry lock function does not operate Power door lock control system Refer to Back Door Entry Lock Function does not Operate [11/2023 - ]
Harness or connector
Back door opener switch assembly
Certification ECU (Smart key ECU assembly)
Entry unlock and unlatch functions do not operate using kick sensor*3 Check customize setting (Kick Sensor Function) Refer to Entry Unlock and Unlatch Functions do not Operate Using Kick Sensor [11/2023 - ]
Power back door system
Certification ECU (Smart key ECU assembly)
Touching unlock sensor for certain period of time does not unlock all doors Check customize setting (Door Unlock Sensor Touch Time Adjust) Refer to Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors [11/2023 - ]
Power door lock control system
Certification ECU (Smart key ECU assembly)
Entry exterior alarm and answer-back buzzer do not sound Check customize setting (Wireless Buzzer Response Function) Refer to Entry Exterior Alarm and Answer-back Buzzer do not Sound [11/2023 - ]
Wireless door lock control system
Lighting system (Int)
Harness or connector
Wireless buzzer (Wireless door lock buzzer)
Certification ECU (Smart key ECU assembly)
Power distribution box assembly
Main body ECU (Multiplex network body ECU)
  1. *1: for HV Model
  2. *2: for Gasoline Model
  3. *3: w/ Hands Free Power Back Door