Note
Recognition code registration is necessary when replacing the main body ECU (multiplex network body ECU).
If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
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 | See page |
|---|---|---|
| All doors lock/unlock functions do not operate via master switch assembly or door key cylinder. | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder" | |
| All doors lock/unlock functions do not operate via door control switch. | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch" | |
| All doors lock function do not operate via master switch assembly and door key cylinder. | Cowl side junction block LH (for LHD) | |
| Cowl side junction block LH (for RHD | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD | ||
| All doors unlock function do not operate via master switch assembly and door key cylinder. | Cowl side junction block LH (for LHD) | |
| Cowl side junction block LH (for RHD | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD |
| Symptom | Suspected Area | See page |
|---|---|---|
| Only driver door lock/unlock functions do not operate. | Front door lock assembly LH | |
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Only driver door unlock function does not operate (lock function operates). | Cowl side junction block LH (for LHD) | |
| Cowl side junction block LH (for RHD | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD | ||
| Only front passenger door lock/unlock functions do not operate. | Front door lock assembly RH | |
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Only rear door LH lock/unlock functions do not operate. | Rear door lock assembly LH | |
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Only rear door RH lock/unlock functions do not operate. | Rear door lock assembly RH | |
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Only back door open function does not operate. | Power Back Door System |
| Symptom | Suspected Area | See page |
|---|---|---|
| Speed-sensitive automatic door lock function does not operate (meter /gauge system operates normally). | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD | ||
| Shift-linked automatic door lock/unlock functions do not operate (transaxle hybrid transmission system operates normally). | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD | ||
| ECM (for 1VD-FTV) | ||
| ECM (for 3UR-FE) | ||
| Key lock-in prevention function does not operate. | Proceed to "Room Oscillator does not Recognize Key" | |
| Front door courtesy light switch assembly LH (for LHD) | ||
| Front door courtesy light switch assembly RH (for RHD) | ||
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD | ||
| Lock operation continues even after doors have been locked* | Front door lock assembly LH | |
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Harness or connector | - | |
| Cowl side junction block LH (for LHD) | ||
| Cowl side junction block LH (for RHD | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD |
Tech Tips
*: 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 3 times.