Note
If the body ECU has been replaced, it is necessary to initialize the body ECU.*1
As the door control battery is installed between the vehicle battery and body ECU, first perform the inspections to confirm that there are no malfunctions in the power source circuit for the body ECU before performing this troubleshooting procedure.*2
*1: w/ Automatic Light Control System
*2: 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 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 | - |
| D/L NO.1 relay*1 | ||
| D/L NO.2 relay*1 | ||
| Instrument panel junction block assembly*3 | ||
| Instrument panel junction block assembly*4 | ||
| Body ECU*3 | ||
| Body ECU*4 | ||
| All doors UNLOCK function does not operate via power window regulator master switch assembly and door key cylinder | Harness or connector | - |
| D/L NO.1 relay*1 | ||
| D/L NO.2 relay*1 | ||
| Instrument panel junction block assembly*3 | ||
| Instrument panel junction block assembly*4 | ||
| Body ECU*3 | ||
| Body ECU*4 | ||
| All doors LOCK/UNLOCK functions do not operate*1 | Proceed to "Power Source Circuit" | |
| All doors LOCK/UNLOCK functions do not operate*2 | Harness or connector | - |
| Instrument panel junction block assembly*3 | ||
| Instrument panel junction block assembly*4 | ||
| Body ECU*3 | ||
| Body ECU*4 |
*1: w/ Door Control Battery
*2: w/o Door Control Battery
*3: for LHD
*4: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| Only driver door LOCK/UNLOCK functions do not operate | Front door lock assembly LH*2 | |
| Front door lock assembly RH*3 | ||
| Harness or connector | - | |
| Only front passenger door LOCK/UNLOCK functions do not operate | Front door lock assembly RH*2 | |
| Front door lock assembly LH*3 | ||
| 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 | - |
*1: for Double Cab
*2: for LHD
*3: for RHD
| 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*5 | ||
| Rear door lock assembly RH*5 | ||
| Harness or connector | - | |
| Body ECU*6 | ||
| Body ECU*7 | ||
| Speed-sensitive automatic door lock function does not operate (meter / gauge system operates normally)*2 | Proceed to "Customize Parameters" | |
| Harness or connector | - | |
| Combination meter assembly | ||
| Body ECU*6 | ||
| Body ECU*7 | ||
| Driver door-linked automatic door unlock function does not operate*2 | Proceed to "Customize Parameters" | |
| Body ECU*6 | ||
| Body ECU*7 | ||
| Key lock-in prevention function does not operate*3 | Unlock warning switch assembly | |
| Harness or connector | - | |
| Body ECU*6 | ||
| Body ECU*7 | ||
| Collision door lock release function does not operate*2 | Proceed to "Collision Door Lock Release Function does not Operate" |
*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/ Speed-sensitive Automatic Door Lock Function
*3: w/o Entry and Start System
*4: w/ Door Control Battery
*5: for Double Cab
*6: for LHD
*7: for RHD