Note
If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
Tech Tips
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) | |
| Front door with motor lock assembly LH | ||
| Front door with motor lock assembly RH | ||
| Harness or connector | ||
| All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch. | Main body ECU (Multiplex network body ECU) | |
| Multiplex network master switch assembly | ||
| All doors lock/unlock functions do not operate via door control switch. | Main body ECU (Multiplex network body ECU) | |
| Power window regulator switch assembly | ||
| Harness or connector | ||
| Driver side junction block assembly | ||
| All doors lock function do not operate via door control switch and door key cylinder. | Driver side junction block assembly | |
| Main body ECU (Multiplex network body ECU) | ||
| All doors unlock function do not operate via door control switch and door key cylinder. | Driver side junction block assembly | |
| Main body ECU (Multiplex network body ECU) | ||
| Only driver door lock/unlock functions do not operate. | Front door with motor lock assembly (for Driver Door) | |
| Harness or connector | - | |
| Driver side junction block assembly | ||
| Only driver door unlock function does not operate (lock function operates). | Front door with motor lock assembly (for Driver Door) | |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Driver side junction block assembly | ||
| Only front passenger door lock/unlock functions do not operate. | Front door with motor lock assembly (for Front Passenger Door) | |
| Harness or connector | - | |
| Driver side junction block assembly | ||
| Speed-sensitive automatic door lock function does not operate (meter/gauge system operates normally). | CAN communication system | |
| Main body ECU (Multiplex network body ECU) | ||
| Shift-linked automatic door lock/unlock functions do not operate (electronic shift lever system operates normally). | CAN communication system | |
| Main body ECU (Multiplex network body ECU) | ||
| Shift control ECU | ||
| Key lock-in prevention function does not operate. | Courtesy light switch LH | |
| Courtesy light switch RH | ||
| Front door with motor lock assembly LH | ||
| Front door with motor lock assembly RH | ||
| Main body ECU (Multiplex network body ECU) | ||
| Driver side junction block assembly | ||
| Double locking function does not operate properly.*1 | LIN communication system | |
| Front door with motor lock assembly LH | ||
| Front door with motor lock assembly RH | ||
| Harness or connector | - | |
| Double lock door control relay assembly | ||
| Main body ECU (Multiplex network body ECU) | ||
| Lock operation continues even after doors have been locked.*2 | Front door with motor lock assembly LH | |
| Front door with motor lock assembly RH | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Driver side junction block assembly | ||
| Door lock indicator light does not operate properly. | Wireless door lock control system | |
| Front multiplex network door ECU LH | ||
| Front multiplex network door ECU RH | ||
| Indicator light assembly LH | ||
| Indicator light assembly RH | ||
| Harness or connector | ||
| When returning to the vehicle, although door unlock operation was not performed, doors were in an unlocked state. | Main body ECU (Multiplex network body ECU) | |
| When returning to the vehicle, although door lock operation was not performed, doors were in a locked state. | Main body ECU (Multiplex network body ECU) | |
| Flush handle does not operate properly. | Flush handle system |
*1: w/ Double Locking System
*2: 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 2 times.