Problem Symptoms Table [11/2021 - ]
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
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 an electrical key and tire pressure monitoring system receiver assembly (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.
SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR ENTRY FUNCTION)
| Symptom | Suspected Area | Link |
|---|---|---|
| Key vehicle inside lock-in prevention function does not operate | Affected by wave interference | Refer to Power Source Mode does not Change to ON (IG and ACC) [11/2021 - ] |
| 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 | ||
| 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 [11/2021 - ] |
| 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 | E-latch system | Refer to All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate [11/2021 - ] |
| 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 [11/2021 - ] |
| Electrical key transmitter sub-assembly | ||
| Certification ECU (Smart key ECU assembly) | ||
| Driver side door entry unlock function does not operate | E-latch system | Refer to Driver Side Door Entry Unlock Function does not Operate [11/2021 - ] |
| 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 | E-latch system | Refer to Front Passenger Side Door Entry Unlock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Front door outside handle assembly (for front passenger door) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door LH entry unlock function does not operate | E-latch system | Refer to Rear Door LH Entry Unlock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Rear door outside handle assembly (for driver side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door RH entry unlock function does not operate | E-latch system | Refer to Rear Door RH Entry Unlock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Rear door outside handle assembly (for front passenger side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Driver side door entry lock and unlock functions do not operate | E-latch system | Refer to Driver Side Door Entry Lock and Unlock Functions do not Operate [11/2021 - ] |
| 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 | E-latch system | Refer to Front Passenger Side Door Entry Lock and Unlock Functions do not Operate [11/2021 - ] |
| Affected by wave interference | ||
| Harness or connector | ||
| Front door outside handle assembly (for front passenger door) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door LH entry lock and unlock functions do not operate | E-latch system | Refer to Rear Door LH Entry Lock and Unlock Functions do not Operate [11/2021 - ] |
| Affected by wave interference | ||
| Harness or connector | ||
| Rear door outside handle assembly (for driver side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door RH entry lock and unlock functions do not operate | E-latch system | Refer to Rear Door RH Entry Lock and Unlock Functions do not Operate [11/2021 - ] |
| Affected by wave interference | ||
| Harness or connector | ||
| Rear door outside handle assembly (for front passenger side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Driver side door entry lock function does not operate | E-latch system | Refer to Driver Side Door Entry Lock Function does not Operate [11/2021 - ] |
| 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 | E-latch system | Refer to Front Passenger Side Door Entry Lock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Front door outside handle assembly (for front passenger door) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door LH entry lock function does not operate | E-latch system | Refer to Rear Door LH Entry Lock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Rear door outside handle assembly (for driver side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Rear door RH entry lock function does not operate | E-latch system | Refer to Rear Door RH Entry Lock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Rear door outside handle assembly (for front passenger side) | ||
| Certification ECU (Smart key ECU assembly) | ||
| Entry interior alarm does not sound | Meter/gauge System | Refer to Entry Interior Alarm does not Sound [11/2021 - ] |
| Back door entry unlock function does not operate | E-latch system | Refer to Back Door Entry Unlock Function does not Operate [11/2021 - ] |
| Harness or connector | ||
| Back door opener switch assembly | ||
| Certification ECU (Smart key ECU assembly) | ||
| Back door entry lock and unlock function does not operate | E-latch system | Refer to Back Door Entry Lock and Unlock Functions do not Operate [11/2021 - ] |
| 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 | E-latch system | Refer to Back Door Entry Lock Function does not Operate [11/2021 - ] |
| 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*1 | Check customize setting (Kick Sensor Function) | Refer to Entry Unlock and Unlatch Functions do not Operate Using Kick Sensor [11/2021 - ] |
| 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 [11/2021 - ] |
| E-latch system | ||
| Certification ECU (Smart key ECU assembly) | ||
| Entry lock function does not operate using close & lock function*2 | Power back door system | Refer to Entry Lock Function does not Operate Using Close & Lock Function [11/2021 - ] |
| 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 [11/2021 - ] |
| Wireless door lock control system | ||
| E-latch system | ||
| Harness or connector | ||
| Wireless door lock buzzer | ||
| Certification ECU (Smart key ECU assembly) | ||
| Power distribution box assembly | ||
| Main body ECU (Multiplex network body ECU) |
- *1: w/ Hands Free Power Back Door
- *2: w/ Power Back Door System