Note
When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.
As the door control battery is installed between the vehicle battery and main body ECU (multiplex network body ECU), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (multiplex network body ECU) before performing this troubleshooting procedure.*
*: w/ Door Control Battery
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 |
|---|---|---|
| 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) (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 (for LHD) | |
| Front door lock assembly LH (for RHD) | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| 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) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| 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) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| All doors LOCK/UNLOCK functions do not operate | Main body ECU (Multiplex network body ECU) (for LHD) | |
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| 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" | |
| Double locking function does not operate properly*2 | LIN communication system | |
| Front door lock assembly LH | ||
| Front door lock assembly RH | ||
| Rear door lock assembly LH | ||
| Rear door lock assembly RH | ||
| Harness or connector | - | |
| Double lock door control relay assembly | ||
| 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*1 | 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) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| Only back door cannot be opened*3 | Proceed to "Only Back Door cannot be Opened" | |
| Only back door cannot be opened*4 | Back door closer system | |
| Speed-sensitive Automatic Door Lock cannot be Operate*5 | Check customize setting | |
| CAN communication system (for LHD with Central Gateway ECU) | ||
| CAN communication system (for LHD without Central Gateway ECU) | ||
| Combination meter assembly | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Shift-linked Automatic Door Lock/Unlock cannot be Operate*5 | Check customize setting | |
| CAN communication system (for LHD with Central Gateway ECU) | ||
| CAN communication system (for LHD without Central Gateway ECU) | ||
| ECM (2AR-FE) | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| All doors LOCK/UNLOCK functions do not operate*6 | Proceed to "Power Source Circuit" | |
| Collision door lock release function does not operate*6 | Proceed to "Collision Door Lock Release Function does not Operate" |
*1: 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.
*2: w/ Double Locking System
*3: w/o Power Back Door System
*4: w/ Power Back Door System
*5: w/ Panic Switch
*6: w/ Door Control Battery