Problem Symptoms Table
HINT:
- 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 |
|---|---|---|
No Door Lock/Unlock Functions Operate Via Master Switch or Driver Side Door Key Cylinder |
Proceed to "All Doors LOCK/UNLOCK Functions Operate Via Master Switch or Driver Side Door Key Cylinder" |
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Only Driver Door Lock/Unlock Functions do not Operate |
Front door lock assembly LH |
|
Harness or connector |
- |
|
Main body ECU (Multiplex network body ECU) |
- |
|
Driver side junction block assembly |
- |
|
Only Passenger Door Lock/Unlock Functions do not Operate |
Front door lock assembly RH |
|
Harness or connector |
- |
|
Main body ECU (Multiplex network body ECU) |
- |
|
Driver side junction block assembly |
- |
|
Only Rear Door LH Lock/Unlock Functions do not Operate |
Rear door lock assembly LH |
|
Harness or connector |
- |
|
Main body ECU (Multiplex network body ECU) |
- |
|
Driver side junction block assembly |
- |
|
Only Rear Door RH Lock/Unlock Functions do not Operate |
Rear door lock assembly RH |
|
Harness or connector |
- |
|
Main body ECU (Multiplex network body ECU) |
- |
|
Driver side junction block assembly |
- |
|
Only Back Door cannot be Operated |
Proceed to "Only Back Door cannot be Operated" |
|
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.