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 |
|---|---|---|
| Only Driver Door LOCK/UNLOCK Functions do not Operate | Front door lock with motor assembly LH (for TMMK Made) | |
| Front door lock with motor assembly LH (for TMC, TMMR Made) | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Instrument panel junction block assembly | - | |
| Only Front Passenger Door LOCK/UNLOCK Functions do not Operate | Front door lock with motor assembly RH (for TMMK Made) | |
| Front door lock with motor assembly RH (for TMC, TMMR Made) | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Instrument panel junction block assembly | - | |
| Only Rear Door LH LOCK/UNLOCK Functions do not Operate | Rear door lock with motor assembly LH (for TMMK Made) | |
| Rear door lock with motor assembly LH (for TMC, TMMR Made) | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Instrument panel junction block assembly | - | |
| Only Rear Door RH LOCK/UNLOCK Functions do not Operate | Rear door lock with motor assembly RH (for TMMK Made) | |
| Rear door lock with motor assembly RH (for TMC, TMMR Made) | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Instrument panel junction block assembly | - | |
| All Doors LOCK/UNLOCK Functions do not Operate | Main body ECU (Multiplex network body ECU) | - |
| All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder" | |
| Lock Operation Continues even after Doors have been Locked* | Front door lock with motor assembly LH (for TMMK Made) | |
| Front door lock with motor assembly LH (for TMC, TMMR Made) | ||
| Front door lock with motor assembly RH (for TMMK Made) | ||
| Front door lock with motor assembly RH (for TMC, TMMR Made) | ||
| Rear door lock with motor assembly LH (for TMMK Made) | ||
| Rear door lock with motor assembly LH (for TMC, TMMR Made) | ||
| Rear door lock with motor assembly RH (for TMMK Made) | ||
| Rear door lock with motor assembly RH (for TMC, TMMR Made) | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - |
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.