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 with motor assembly LH*1 | |
| Front door lock with motor assembly RH*2 | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| Only front passenger door LOCK/UNLOCK functions do not operate | Front door lock with motor assembly RH*1 | |
| Front door lock with motor assembly LH*2 | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| Only rear door LH LOCK/UNLOCK functions do not operate | Slider door handle assembly LH | |
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| Only rear door RH LOCK/UNLOCK functions do not operate | Slider door handle assembly RH | |
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| All doors LOCK/UNLOCK functions do not operate*1 | Proceed to "Power Source Circuit" | |
| All doors LOCK/UNLOCK functions do not operate*2 | Wire harness or connector | - |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| 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" | |
| Only Back Door cannot be Opened | Proceed to "Only Back Door cannot be Opened" | |
| Lock operation continues even after doors have been locked*7 | Front door lock with motor assembly LH | |
| Front door lock with motor assembly RH | ||
| Slider door handle assembly LH | ||
| Slider door handle assembly RH | ||
| Wire harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Junction block assembly LH | ||
| Speed-sensitive automatic door lock function does not operate (meter/gauge system operates normally). | CAN communication system*1 | |
| CAN communication system*2 | ||
| Main body ECU (Multiplex network body ECU) | ||
| Shift-linked automatic lock/unlock functions do not operate (Automatic transaxle system operates normally).*3 | CAN communication system*1 | |
| CAN communication system*2 | ||
| Main body ECU (Multiplex network body ECU) | ||
| ECM*5 | ||
| ECM*6 | ||
| Shift-linked automatic lock/unlock functions do not operate (CVT system operates normally).*4 | CAN communication system*1 | |
| CAN communication system*2 | ||
| Main body ECU (Multiplex network body ECU) | ||
| ECM*5 | ||
| ECM*6 | ||
| Key lock-in prevention function does not operate. | Proceed to "Room Oscilator does not Recognize Key" | |
| Front door courtesy light switch assembly LH*1 | ||
| Front door courtesy light switch assembly RH*2 | ||
| Harness or connector | - | |
| Junction block assembly LH | ||
| Main body ECU (Multiplex network body ECU) | ||
| Collision door lock release function does not operate | Proceed to "Collision Door Lock Release Function does not Operate" |
*1: for LHD
*2: for RHD
*3: for Automatic transaxle
*4: for CVT
*5: for 2AR-FE
*6: for 2GR-FKS
*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.