| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H5VJ |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 06/2021] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for HV Model): PROBLEM SYMPTOMS TABLE; 2020 - 2021 MY Corolla Corolla HV [01/2019 - 06/2021] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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![2020 MY Corolla Corolla HV [01/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
- 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 |
Refer to "LO-beam Headlight does not Illuminate" |
|
|
Right low beam headlight does not illuminate |
Refer to "LO-beam Headlight does not Illuminate" |
|
|
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 |
Headlight unit assembly LH |
|
|
Harness or connector |
- |
|
|
Right high beam headlight does not illuminate |
Headlight unit assembly RH |
|
|
Harness or connector |
- |
|
|
Both left and right high beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
High beam headlight 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) |
|
Parking Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left parking light does not illuminate |
Headlight unit assembly LH |
|
|
Harness or connector |
- |
|
|
Right parking light does not illuminate |
Headlight unit assembly RH |
|
|
Harness or connector |
- |
|
|
Both left and right parking lights do not illuminate |
Taillight relay circuit |
|
|
Harness or connector |
- |
Front Side Marker Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left front side marker light does not illuminate |
Front side marker light bulb |
|
|
Harness or connector |
- |
|
|
Right front side marker light does not illuminate |
Front side marker light bulb |
|
|
Harness or connector |
- |
|
|
Both left and right front side marker lights do not illuminate |
Taillight relay circuit |
|
|
Harness or connector |
- |
Taillight
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right taillight (rear combination light assembly) does not illuminate |
Rear combination light LED |
|
|
Rear combination 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 side marker light bulb |
|
|
Harness or connector |
- |
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 does not illuminate |
Rear combination 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 |
Back-up light bulb |
|
|
Rear light socket and wire |
|
|
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate |
Back-up light circuit |
|
Turn Signal Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Headlight unit assembly |
|
|
Harness or connector |
- |
|
|
Left or right rear turn signal light does not operate |
Rear turn signal light bulb |
|
|
Rear combination 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 |
|
|
|
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 |
|
- *: w/ Side Turn Signal Light
Hazard Warning Signal Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Hazard warning signal lights do not operate |
Hazard warning switch circuit |
|
|
Combination meter assembly |
|
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) |
|
Follow Me Home System (w/ Follow Me Home System)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Follow me home system does not operate |
IG signal circuit |
|
|
Headlight dimmer switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Automatic Light Control System (w/ Automatic Light Control)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Automatic light control system does not operate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
Daytime Running Light System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left daytime running light does not illuminate |
Headlight unit assembly LH |
|
|
Harness or connector |
- |
|
|
Right daytime running light does not illuminate |
Headlight unit assembly RH |
|
|
Harness or connector |
- |
|
|
Both left and right daytime running lights do not illuminate |
Check customize settings |
|
|
Daytime running light circuit |
|
|
|
Headlight dimmer switch circuit |
|
|
|
IG signal circuit |
|
|
|
CAN communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
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) |
|
Automatic High Beam System (w/ 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) |
Front radar sensor system |
|
|
Check Data List (Front Recognition Camera High Temperature 2) |
||
|
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" |
|
|
|