Note
If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
Note
If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
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 |
|---|---|---|
| All doors lock/unlock functions do not operate via multiplex network master switch assembly or door key cylinder. | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder" | |
| All doors lock/unlock functions do not operate via door control switch. | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch" | |
| All doors lock function do not operate via multiplex network master switch assembly and door key cylinder. | Instrument panel junction block assembly*1 | |
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| All doors unlock function do not operate via multiplex network master switch assembly and door key cylinder. | Instrument panel junction block assembly*1 | |
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| All doors LOCK/UNLOCK functions do not operate*3 | Proceed to "Power Source Circuit" |
*1: for LHD
*2: for RHD
*3: w/ Door Control Battery
| Symptom | Suspected Area | Link |
|---|---|---|
| Only driver door lock/unlock functions do not operate. | Front door lock assembly LH*1 | |
| Front door lock assembly RH*2 | ||
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Only driver door unlock function does not operate (lock function operates). | Instrument panel junction block assembly*1 | |
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| Only front passenger door lock/unlock functions do not operate. | Front door lock assembly RH*1 | |
| Front door lock assembly LH*2 | ||
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Only rear door LH lock/unlock functions do not operate. | Rear door lock assembly LH | |
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Only rear door RH lock/unlock functions do not operate. | Rear door lock assembly RH | |
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Only back door open function does not operate*3. | Power Back Door System | |
| Only back door open function does not operate*4. | Proceed to "Only Back Door cannot be Opened" |
*1: for LHD
*2: for RHD
*3: w/ Power Back Door System
*4: w/o Power Back Door System
| Symptom | Suspected Area | Link |
|---|---|---|
| Speed-sensitive automatic door lock function does not operate (meter / gauge system operates normally). | CAN communication system | |
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| Shift-linked automatic door lock/unlock functions do not operate (automatic transaxle system operates normally). | CAN communication system | |
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| ECM (for 8AR-FTS) | ||
| ECM (for 3ZR-FAE) | ||
| Key lock-in prevention function does not operate. | Proceed to "Room Oscillator does not Recognize Key" (w/ Entry Function) | |
| Proceed to "Room Oscillator does not Recognize Key" (w/o Entry Function) | ||
| Front door courtesy light switch assembly LH*1 | ||
| Front door courtesy light switch assembly RH*2 | ||
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| Double locking function does not operate properly*3. | 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)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| 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 | ||
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 | ||
| Collision door lock release function does not operate*5 | Proceed to "Collision Door Lock Release Function does not Operate" |
*1: for LHD
*2: for RHD
*3: w/ Double Locking System
*4: 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.
*5: w/ Door Control Battery