Tech Tips
Use the table below to help determine the cause of the problem symptom. 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 |
|---|---|---|
| No door lock/unlock functions operate via power window regulator master switch assembly or driver side door key cylinder | Proceed to "All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder" | |
| 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 | - | |
| Driver side junction block assembly | - | |
| Only front passenger door lock/unlock functions do not operate | Front door lock assembly RH (for LHD) | |
| Front door lock assembly LH (for LHD) | ||
| Harness or connector | - | |
| Driver side junction block assembly | - | |
| Only rear door LH lock/unlock functions do not operate (for Double Cab) | Rear door lock assembly LH | |
| Harness or connector | - | |
| Driver side junction block assembly | - | |
| Only rear door RH lock/unlock functions do not operate (for Double Cab) | Rear door lock assembly RH | |
| Harness or connector | - | |
| Driver side junction block assembly | - | |
| Speed-sensitive automatic door lock does not operate (for LHD) | Check customize parameters | |
| Harness or connector | - | |
| Proceed to Meter / Gauge system | ||
| Ignition switch-linked automatic door unlock does not operate (for LHD) | Check customize parameters | |
| Harness or connector | - | |
| Ignition switch assembly (for 1TR-FE) | ||
| Ignition switch assembly (for 2TR-FE) | ||
| Ignition switch assembly (for 1KD-FTV) | ||
| Ignition switch assembly (for 2KD-FTV) | ||
| Driver side junction block assembly | - | |
| Theft warning ECU assembly | - | |
| 2 step unlock function does not operate | Check customize parameters | |
| Harness or connector | - | |
| Theft warning ECU assembly | - |