Note
If the main body ECU (multiplex network body ECU) is replaced, refer to 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 |
|---|---|---|
| No door lock/unlock functions operate via multiplex network master switch assembly or driver side door key cylinder | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch, Door Key Cylinder" | |
| No door lock/unlock functions operate via power window regulator switch assembly | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch" | |
| Only driver door lock/unlock functions do not operate | Front door lock assembly LH (for LHD) | |
| Front door lock assembly RH (for RHD) | ||
| Harness or connector | - | |
| Main body ECU (multiplex network body ECU) | ||
| Cowl side junction block LH | ||
| Only front passenger door lock/unlock functions do not operate | Front door lock assembly RH (for LHD) | |
| Front door lock assembly LH (for RHD) | ||
| Harness or connector | - | |
| Main body ECU (multiplex network body ECU) | ||
| Cowl side junction block LH | ||
| Only rear door LH lock/unlock functions do not operate | Rear door lock assembly LH | |
| Harness or connector | - | |
| Main body ECU (multiplex network body ECU) | ||
| Cowl side junction block LH | ||
| Only rear door RH lock/unlock functions do not operate | Rear door lock assembly RH | |
| Harness or connector | - | |
| Main body ECU (multiplex network body ECU) | ||
| Cowl side junction block LH | ||
| Speed-sensitive automatic door lock function does not operate properly (w/ Speed-sensitive automatic Door Lock Function) | Perform operation check | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Meter/gauge system | ||
| Shift-linked automatic door lock/unlock function do not operate properly (w/ Shift-linked Automatic Door Lock/Unlock Function) | Perform operation check | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) | ||
| Meter/gauge system | ||
| Double locking function does not operate properly (w/ Double Locking System) | Perform operation check | |
| Harness or connector | - | |
| Front door lock assembly LH | ||
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Front multiplex network door ECU LH | ||
| Front multiplex network door ECU RH | ||
| 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 | - | |
| Main body ECU (multiplex network body ECU) | ||
| Cowl side junction block LH |
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.