Problem Symptoms Table [12/2017 - 10/2023]
NOTE:
If the main body ECU (multiplex network body ECU) is replaced, refer to the Smart Access System with Push-button Start (for Start Function).
Refer to PRECAUTION [12/2017 - 10/2022] , or refer to PRECAUTION [10/2022 - 10/2023]
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.
| Symptom | Suspected Area | Link |
|---|---|---|
| All doors lock/unlock functions do not operate via door key cylinder. | Main body ECU (Multiplex network body ECU) | Refer to All Doors LOCK/UNLOCK Functions do not Operate Via Door Key Cylinder [12/2017 - 10/2023] |
| Front door with motor lock assembly LH | ||
| Front door with motor lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Harness or connector | ||
| All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch. | Main body ECU (Multiplex network body ECU) | Refer to All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch [12/2017 - 10/2023] |
| Multiplex network master switch assembly | ||
| All doors lock/unlock functions do not operate via door control switch. | Main body ECU (Multiplex network body ECU) | Refer to All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch [12/2017 - 10/2023] |
| Power window regulator switch assembly | ||
| Harness or connector | ||
| Instrument panel junction block assembly | ||
| All doors lock function do not operate via door control switch and door key cylinder. | Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| All doors unlock function do not operate via door control switch and door key cylinder. | Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only driver door lock/unlock functions do not operate. | Front door with motor lock assembly LH | Refer to INSPECTION [12/2017 - ] |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only driver door unlock function does not operate (lock function operates). | Front door with motor lock assembly LH | Refer to INSPECTION [12/2017 - ] |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only front passenger door lock/unlock functions do not operate. | Front door with motor lock assembly RH | Refer to INSPECTION [12/2017 - ] |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only rear door LH lock/unlock functions do not operate. | Rear door lock assembly LH | Refer to INSPECTION [12/2017 - ] |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only rear door RH lock/unlock functions do not operate. | Rear door lock assembly RH | Refer to INSPECTION [12/2017 - ] |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Speed-sensitive automatic door lock function does not operate (meter/gauge system operates normally). | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 10/2023] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Shift-linked automatic door lock/unlock functions do not operate (electronic shift lever system operates normally). | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 10/2023] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Shift control ECU (for AGA0E) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Shift control ECU (for AGA0F) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Key lock-in prevention function does not operate. | Front door courtesy light switch assembly LH | Refer to Door Courtesy Switch Circuit [12/2017 - 10/2023] |
| Front door courtesy light switch assembly RH | Refer to Door Courtesy Switch Circuit [12/2017 - 10/2023] | |
| Rear door courtesy light switch assembly LH | Refer to Door Courtesy Switch Circuit [12/2017 - 10/2023] | |
| Rear door courtesy light switch assembly RH | Refer to Door Courtesy Switch Circuit [12/2017 - 10/2023] | |
| Front door with motor lock assembly LH | Refer to INSPECTION [12/2017 - ] | |
| Front door with motor lock assembly RH | Refer to INSPECTION [12/2017 - ] | |
| Rear door lock assembly LH | Refer to INSPECTION [12/2017 - ] | |
| Rear door lock assembly RH | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Lock operation continues even after doors have been locked.* | Front door with motor lock assembly LH | Refer to INSPECTION [12/2017 - ] |
| Front door with motor lock assembly RH | Refer to INSPECTION [12/2017 - ] | |
| Rear door lock assembly LH | Refer to INSPECTION [12/2017 - ] | |
| Rear door lock assembly RH | Refer to INSPECTION [12/2017 - ] | |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Instrument panel junction block assembly | Refer to REMOVAL [12/2017 - 09/2018] , or refer to REMOVAL [09/2018 - 10/2020] , or refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] | |
| Only remote door LOCK/UNLOCK functions do not operate (power door lock operation is normally). (w/ Lexus Enform Remote) | Telematics system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 10/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 10/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] |
- *: When the door unlock detection switch detects an unlock position signal after a door lock operation has been performed, a door lock operation will be performed 4 times.