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 |
|---|---|---|
All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate |
Power door lock control system |
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Electrical key transmitter |
|
|
Transmitter battery |
|
|
Door control receiver |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
All Door Entry Lock/Unlock Functions do not Operate, but Wireless Functions Operate |
Electrical key transmitter |
|
Certification ECU |
|
|
Driver Side Door Entry Unlock Function does not Operate |
Power door lock control system |
|
Front door outside handle assembly (for driver side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Front Passenger Side Door Entry Unlock Function does not Operate |
Power door lock control system |
|
Front door outside handle assembly (for front passenger side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Driver Side Door Entry Lock and Unlock Functions do not Operate |
Power door lock control system |
|
Front door outside handle assembly (for driver side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Front Passenger Side Door Entry Lock and Unlock Functions do not Operate |
Power door lock control system |
|
Front door outside handle assembly (for front passenger side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Driver Side Door Entry Lock Function does not Operate |
Power door lock control system |
|
Front door outside handle assembly (for driver side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Front Passenger Side Door Entry Lock Function does not Operate |
Power door lock control system |
|
Front door outside handle assembly (for front passenger side) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Room Oscillator does not Recognize Key |
Smart key system (for Start Function) |
|
Indoor No. 1 electrical key antenna (front floor) |
|
|
Indoor No. 2 electrical key antenna (rear floor) |
|
|
Indoor No. 2 electrical key antenna (inside luggage) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Electrical key transmitter |
|
|
Entry Interior Alarm does not Sound |
Meter/gauge system |
|
Certification ECU |
|
|
Back Door Entry Unlock Function does not Operate |
Power door lock control system |
|
Back door control switch |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Back Door Entry Lock and Unlock Functions do not Operate |
Power door lock control system |
|
Electrical key antenna (outside luggage) |
|
|
Certification ECU |
|
|
Harness or connector |
|
|
Back Door Entry Lock Function does not Operate |
Power door lock control system |
|
Back door control switch |
|
|
Certification ECU |
|
|
Harness or connector |
|
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.