Note
w/ Entry and Start System:
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 | See page |
|---|---|---|
| Only Driver Door Lock/Unlock Functions do not Operate | Front door lock assembly (Driver side) | |
| Harness or connector | - | |
| Driver side junction block assembly | ||
| Only Front Passenger Door Lock/Unlock Functions do not Operate | Front door lock assembly (Front passenger side) | |
| Harness or connector | - | |
| Only Rear Door LH Lock/Unlock Functions do not Operate*1 | Rear door lock assembly LH | |
| Harness or connector | - | |
| Only Rear Door RH Lock/Unlock Functions do not Operate*1 | Rear door lock assembly RH | |
| Harness or connector | - | |
| Only Back Door Lock/Unlock Functions do not Operate | Back door lock assembly | |
| Harness or connector | - | |
| All Doors Lock/Unlock Functions do not Operate*2 | Proceed to "Power Source Circuit" | |
| All Doors Lock/Unlock Functions do not Operate*3 | Harness or connector | - |
| Main body ECU (Multiplex network body ECU) | ||
| Driver side junction block assembly | ||
| All doors LOCK/UNLOCK functions do not operate via master switch or door key cylinder | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder" | |
| Double Locking Function does not Operate Properly*4 | LIN communication system | |
| Front door lock assembly LH | ||
| Front door lock assembly RH | ||
| Rear door lock assembly LH*1 | ||
| Rear door lock assembly RH*1 | ||
| Harness or connector | - | |
| Double lock door control relay assembly | ||
| Main body ECU (Multiplex network body ECU) | ||
| Speed-sensitive automatic door lock function does not operate (meter /gauge system operates normally)*5 | CAN communication system (w/ Central Gateway ECU) | |
| CAN communication system (w/o Central Gateway ECU) | ||
| Main body ECU (Multiplex network body ECU) | ||
| Driver side junction block assembly | ||
| Shift-linked automatic door lock/unlock functions do not operate (automatic transmission system operates normally).*6 | CAN communication system (w/ Central Gateway ECU) | |
| CAN communication system (w/o Central Gateway ECU) | ||
| Main body ECU (Multiplex network body ECU) | ||
| ECM (for 1GR-FE) | ||
| ECM (for 1KD-FTV) | ||
| ECM (for 1GD-FTV) | ||
| ECM (for 5L-E) | ||
| ECM (for 2GTR-FE) | ||
| Key lock-in prevention function does not operate. | Front door courtesy light switch assembly LH (for LHD) | |
| Front door courtesy light switch assembly RH (for RHD) | ||
| Harness or connector | - | |
| Driver side junction block assembly | ||
| Main body ECU (Multiplex network body ECU) | ||
| Lock operation continues even after doors have been locked*7 | Front door lock assembly LH | |
| Front door lock assembly RH | ||
| Rear door lock assembly LH*1 | ||
| Rear door lock assembly RH*1 | ||
| Back door lock assembly | ||
| Harness or connector | - | |
| Driver side junction block assembly | ||
| Main body ECU (Multiplex network body ECU) | ||
| Collision door lock release function does not operate*2, *5 | Proceed to "Collision Door Lock Release Function does not Operate" | |
| Collision door lock release function does not operate*3, *5 | Harness or connector | - |
| Driver side junction block assembly | ||
| Main body ECU (Multiplex network body ECU) | ||
| 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) |
*1: for 5 Door
*2: w/ Door Control Battery
*3: w/o Door Control Battery
*4: w/ Double Locking System
*5: w/ Speed-sensitive Automatic Door Lock Function
*6: for Automatic Transaxle
Tech Tips
*7: 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.