| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001QM6X |
| Model Year Start: 2021 | Model: Avalon | Prod Date Range: [08/2020 - 08/2021] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with Cornering Light): PROBLEM SYMPTOMS TABLE; 2021 MY Avalon [08/2020 - 08/2021] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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![2021 - 2022 MY Avalon [08/2020 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
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If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
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-
If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information the headlight ECU sub-assembly LH.
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- When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
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.
Headlight
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left low beam headlight does not illuminate |
Headlight ECU sub-assembly LH |
|
|
Headlight assembly LH |
|
|
|
Right low beam headlight does not illuminate |
Headlight ECU sub-assembly RH |
|
|
Headlight assembly RH |
|
|
|
Both left and right low beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Left high beam headlight does not illuminate |
High beam headlight circuit |
|
|
Headlight assembly LH |
|
|
|
Right high beam headlight does not illuminate |
High beam headlight circuit |
|
|
Headlight assembly RH |
|
|
|
Both left and right high beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
High Flash (passing function) does not operate (high beam headlights are normal) |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Left low beam headlight and high beam headlight do not illuminate |
Headlight ECU sub-assembly LH |
|
|
Right low beam headlight and high beam headlight do not illuminate |
Headlight ECU sub-assembly RH |
|
Parking Light/Daytime Running Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left parking light/daytime running light does not illuminate |
Parking light/daytime running light circuit |
|
|
Headlight ECU sub-assembly LH |
|
|
|
Right parking light/daytime running light does not illuminate |
Parking light/daytime running light circuit |
|
|
Headlight ECU sub-assembly RH |
|
|
|
Both left and right parking lights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Both left and right daytime running lights do not illuminate |
Check customize settings |
|
|
Headlight dimmer switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Cornering Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left cornering light does not illuminate |
Check operating conditions |
|
|
Cornering light circuit |
|
|
|
Headlight ECU sub-assembly LH |
|
|
|
Right cornering light does not illuminate |
Check operating conditions |
|
|
Cornering light circuit |
|
|
|
Headlight ECU sub-assembly RH |
|
Front Side Marker Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left front side marker light does not illuminate |
Front side marker light circuit |
|
|
Headlight ECU sub-assembly LH |
|
|
|
Right front side marker light does not illuminate |
Front side marker light circuit |
|
|
Headlight ECU sub-assembly RH |
|
|
|
Both left and right front side marker lights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
Taillight
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right taillight (rear combination light assembly) does not illuminate |
Rear combination light assembly |
|
|
Rear combination light socket and wire |
|
|
|
Harness or connector |
- |
|
|
Left or right taillight (rear light assembly) does not illuminate |
Rear light assembly |
|
|
Rear light cord |
|
|
|
Harness or connector |
- |
|
|
All of the taillights, license plate lights and rear side marker lights do not illuminate |
Headlight dimmer switch circuit |
|
|
Taillight relay circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Rear Side Marker Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right rear side marker light does not illuminate |
Rear combination light assembly |
|
|
Rear combination light socket and wire |
|
License Plate Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
License plate light does not illuminate |
License plate light assembly |
|
|
Harness or connector |
- |
Stop Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right stop light (rear combination light assembly) does not illuminate |
Rear combination light assembly |
|
|
Rear combination light socket and wire |
|
|
|
Harness or connector |
- |
|
|
Left or right stop light (rear light assembly) does not illuminate |
Rear light assembly |
|
|
Rear light cord |
|
|
|
Harness or connector |
- |
|
|
All of the stop lights do not illuminate |
STOP fuse |
- |
|
Stop light switch assembly |
|
|
|
Harness or connector |
- |
High Mounted Stop Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
High mounted stop light does not illuminate |
Center stop light set |
|
|
Harness or connector |
- |
Back-up Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right back-up light does not illuminate |
Rear light assembly |
|
|
Rear light cord |
|
|
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate |
BKUP LP fuse |
- |
|
ECU-ACC fuse |
- |
|
|
Park/neutral position switch assembly (for 2GR-FKS) |
|
|
|
Park/neutral position switch assembly (for A25A-FKS) |
|
|
|
Instrument panel junction block assembly |
|
|
|
Harness or connector |
- |
Turn Signal Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Headlight ECU sub-assembly |
|
|
Headlight assembly |
|
|
|
Harness or connector |
- |
|
|
Left or right rear turn signal light does not operate |
Rear combination light assembly |
|
|
Rear combination light socket and wire |
|
|
|
Rear light assembly |
|
|
|
Rear light cord |
|
|
|
Harness or connector |
- |
|
|
Left or right side turn signal light does not operate |
Side turn signal light assembly |
|
|
Outer rear view mirror assembly |
|
|
|
Outer mirror control ECU assembly |
|
|
|
Harness or connector |
- |
|
|
Turn signal lights do not operate in one direction |
Turn signal switch circuit |
|
|
Meter/gauge system |
|
|
|
All turn signal lights do not operate |
Turn signal switch circuit |
|
|
Combination meter assembly |
|
|
|
All turn signal lights do not flash at the correct speed |
Combination meter assembly |
|
Hazard Warning Signal Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Hazard warning signal lights do not operate |
Hazard warning switch circuit |
|
|
Combination meter assembly |
|
Automatic Light Control System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Automatic light control system does not operate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
Light Auto Turn-off System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Light auto turn-off system does not operate |
Headlight dimmer switch circuit |
|
|
IG signal circuit |
|
|
|
Front door courtesy switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Remote Operation Function
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Lights do not operate using remote operation function (lighting system is normal) |
Telematics system |
|
Wiper-linked Low Beam Headlight Control System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Wiper-linked low beam headlight control system does not operate |
Check customize settings |
|
|
Main body ECU (Multiplex network body ECU) |
|
Welcome Light Illumination Control
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Welcome light illumination control does not operate |
Check customize settings |
|
|
Main body ECU (Multiplex network body ECU) |
|
Automatic High Beam System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Automatic high beam system does not operate or automatic high beam indicator does not illuminate (low beam headlights and high beam headlights are normal) |
Check millimeter wave radar sensor assembly |
|
|
Check Data List (High Temperature Status1) |
||
|
Check automatic high beam indicator light |
||
|
Check Data List (Auto H Beam STS0) |
||
|
Perform Active Test (Multi Display All (White)) |
||
|
Auto high beam switch |
||
|
Harness or connector |
||
|
Combination meter assembly |
||
|
Forward recognition camera |
||
|
Main body ECU (Multiplex network body ECU) |
||
|
Auto high beam switch indicator does not come ON |
Refer to "Automatic High Beam Switch Indicator does not Come ON" |
|
|
|