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 power window regulator master switch assembly or door key cylinder | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Power Window Regulator Master Switch Assembly or Door Key Cylinder" | |
| All doors LOCK function does not operate via power window regulator master switch assembly and door key cylinder | Harness or connector | - |
| Instrument panel junction block assembly | ||
| Body ECU | ||
| All doors UNLOCK function does not operate via power window regulator master switch assembly and door key cylinder | Harness or connector | - |
| Instrument panel junction block assembly | ||
| Body ECU | ||
| All doors LOCK/UNLOCK functions do not operate | Harness or connector | - |
| Instrument panel junction block assembly | ||
| Body ECU |
| Symptom | Suspected Area | Link |
|---|---|---|
| Only driver door LOCK/UNLOCK functions do not operate | Front door lock assembly RH | |
| Harness or connector | - | |
| Only front passenger door LOCK/UNLOCK functions do not operate | Front door lock assembly LH | |
| Harness or connector | - | |
| Only rear door LH LOCK/UNLOCK functions do not operate*3 | Rear door lock assembly LH | |
| Harness or connector | - | |
| Only rear door RH LOCK/UNLOCK functions do not operate*3 | Rear door lock assembly RH | |
| Harness or connector | - | |
| Only back door cannot be opened*1 | Power back door system | |
| Only back door cannot be opened*2 | Proceed to "Only Back Door cannot be Opened" |
*1: w/ Power Back Door System
*2: w/o Power Back Door System
| Symptom | Suspected Area | Link |
|---|---|---|
| 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 | - | |
| Body ECU | ||
| Key lock-in prevention function does not operate*2 | Unlock warning switch | |
| Harness or connector | - | |
| Body ECU |
*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/o Smart Entry and Start System