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Home >> Lexus >> 2021 >> UX 250h Base >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System W/ Push-Button Start (Entry Function) (Diagnostics - Introduction) (Hybrid) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function, HV Model) >> Problem Symptoms Table [10/2018 - 08/2021] >> Problem Symptoms Table [10/2018 - 08/2021]

Problem Symptoms Table [10/2018 - 08/2021]

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SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR ENTRY FUNCTION)

Symptom Suspected Area Link
Key vehicle inside lock-in prevention function does not operate External electrical waves Refer to Power Source Mode does not Change to ON (IG and ACC) [10/2018 - 08/2021]
Harness or connector
No. 1 indoor electrical key antenna assembly (front floor)
No. 2 indoor electrical key antenna assembly (rear floor)
No. 1 indoor electrical key antenna assembly (inside luggage compartment)
Certification ECU (Smart key ECU assembly)
Transmitter battery
Instrument panel junction block assembly
Power switch
All door entry lock/unlock functions and wireless functions do not operate Lighting system Refer to All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [10/2018 - 08/2021]
Power door lock control system
External electrical waves
Code registration
Transmitter battery
Harness or connector
Electrical key transmitter sub-assembly
Electrical key and TPMS 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 Check customize setting (Entry cancel function (manual operation)) Refer to All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate [10/2018 - ]
External electrical waves
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 Refer to Driver Side Door Entry Unlock Function does not Operate [10/2018 - ]
Harness or connector
Front door outside handle assembly LH
Lighting system
Certification ECU (Smart key ECU assembly)
Front passenger side door entry unlock function does not operate Power door lock control system Refer to Front Passenger Side Door Entry Unlock Function does not Operate [10/2018 - ]
Harness or connector
Front door outside handle assembly RH
Lighting system
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 [10/2018 - ]
External electrical waves
Harness or connector
Front door outside handle assembly LH
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 [10/2018 - ]
External electrical waves
Harness or connector
Front door outside handle assembly RH
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 [10/2018 - ]
Harness or connector
Front door outside handle assembly LH
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 [10/2018 - ]
Harness or connector
Front door outside handle assembly RH
Certification ECU (Smart key ECU assembly)
Entry interior alarm does not sound METER/GAUGE System Refer to Entry Interior Alarm does not Sound [10/2018 - ]
Back door entry unlock function does not operate Power door lock control system Refer to Back Door Entry Unlock Function does not Operate [10/2018 - ]
Back door opener switch assembly
Certification ECU (Smart key ECU assembly)
Harness or connector
Back door entry lock and unlock functions do not operate Power door lock control system Refer to Back Door Entry Lock and Unlock Functions do not Operate [10/2018 - ]
Electrical key antenna (outside luggage compartment)
Certification ECU (smart key ECU assembly)
Harness or connector
Back door entry lock function does not operate Power door lock control system Refer to Back Door Entry Lock Function does not Operate [10/2018 - ]
Back door opener switch assembly
Certification ECU (smart key ECU assembly)
Harness or connector
Entry lock function does not operate using close & lock function*1 Power back door system Refer to Entry Lock Function does not Operate Using Close & Lock Function [10/2018 - ]
Electrical key antenna (outside luggage compartment)
Certification ECU (smart key ECU assembly)
Harness or connector
Entry unlock and unlatch functions do not operate using kick sensor*1 Check customize setting (Kick Sensor Function) Refer to Entry Unlock and Unlatch Functions do not Operate Using Kick Sensor [10/2018 - ]
Power trunk lid system
Check customize setting (Kick Sensor Function)
Entry exterior alarm and answer-back buzzer do not sound Check customize setting (Wireless Buzzer Resp) Refer to Entry Exterior Alarm and Answer-back Buzzer do not Sound [10/2018 - ]
Lighting system
Harness or connector
Instrument panel junction block assembly
Wireless door lock buzzer
Main body ECU (Multiplex network body ECU)
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) Refer to Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors [10/2018 - ]
Power door lock control system
Certification ECU (Smart key ECU assembly)
  1. *1: w/ Power Back Door System