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.
Illuminated Entry SystemSymptom | Suspected Area | See page |
|---|---|---|
Only roof console box assembly does not illuminate. |
Bulb |
- |
Harness or connector |
- |
|
Only step or spot light assembly does not illuminate. |
Bulb |
- |
Harness or connector |
- |
|
Only transponder key amplifier does not illuminate. (w/o Smart Key System) |
Transponder key amplifier |
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Harness or connector |
- |
|
Only engine switch illumination does not illuminate. (w/ Smart Key System) |
Engine switch illumination circuit |
|
Certification ECU (Smart key ECU assembly) |
|
|
Illuminated entry system does not operate normally. |
DOME fuse |
- |
Door courtesy switch circuit |
|
|
Door unlock detection switch circuit |
|
|
IG signal circuit |
|
|
ACC signal circuit |
|
|
Interior light circuit |
|
|
Engine switch illumination circuit |
|
|
Main body ECU (Driver side junction block assembly) |
|
Symptom | Suspected Area | See page |
|---|---|---|
Vanity light does not illuminate. |
Bulb |
- |
Harness or connector |
- |
Symptom | Suspected Area | See page |
|---|---|---|
Glove box light does not illuminate. |
Glove box light assembly |
|
Harness or connector |
- |
Symptom | Suspected Area | See page |
|---|---|---|
Front door courtesy light does not illuminate. |
Bulb |
- |
Courtesy light assembly |
|
|
Front door courtesy light switch |
|
|
Harness or connector |
- |
Symptom | Suspected Area | See page |
|---|---|---|
Battery saving function does not operate. |
Door courtesy light switch circuit |
|
Door unlock detection switch circuit |
|
|
IG signal circuit |
|
|
ACC signal circuit |
|
|
Interior light auto cut circuit |
|
|
Main body ECU (Driver side junction block assembly) |
|
Symptom | Suspected Area | See page |
|---|---|---|
All the interior lights that receive power via the dome cut relay do not illuminate. (The DOME fuse is normal.) |
Interior light power source circuit |
|
Main body ECU (Driver side junction block assembly) |
|
|
All the interior lights that receive power via the dome cut relay do not illuminate. (Although the DOME fuse is replaced, the fuse breaks again.) |
Roof console box assembly |
|
Courtesy light assembly |
|
|
No. 2 room light assembly |
|
|
Harness or connector (Including all light components that are part of the wire harness) |
- |
Symptom | Suspected Area | See page |
|---|---|---|
Luggage compartment light does not illuminate. |
Bulb |
- |
No. 2 room light assembly |
|
|
Back door courtesy switch |
|
|
Harness or connector |
- |
Test yourself
A quick Toyota Venza quiz: every answer comes with an explanation and a link to the manual page.