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 assembly (for Driver door) | |
| 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 assembly (for Front passenger door) | |
| 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 assembly LH | |
| 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 assembly RH | |
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Instrument panel junction block assembly | - | |
| All Doors LOCK/UNLOCK Functions do not Operate | Instrument panel junction block assembly | - |
| All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder | LIN communication system | |
| Multiplex network master switch assembly | - | |
| Front door lock assembly (for Driver door) | - | |
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch | Door control switch (Power window regulator switch assembly) | |
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Double Locking Function does not Operate Properly*1 | LIN communication system | |
| Front door lock assembly LH | ||
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Wire 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*4 | Front door lock assembly LH | |
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Only Back Door cannot be Opened*2 | Back door lock assembly | |
| Back door opener switch assembly | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Wire harness or connector | - | |
| Only Back Door cannot be Opened*3 | Entry and start system (for Entry function) |
Tech Tips
*1: w/ Double Locking System
*2: w/o Entry System Back Door Open Function
*3: w/ Entry System Back Door Open Function
*4: When the 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.