| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001L1N2 |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [09/2019 - 04/2020] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM (for Gasoline Model with AFS): PROBLEM SYMPTOMS TABLE; 2020 MY Corolla Corolla Hatchback GR Corolla [09/2019 - 04/2020] | ||
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 Hatchback GR Corolla [09/2019 - 04/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
-
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
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- When replacing the headlight ECU sub-assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH 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.
- 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 unit assembly LH |
|
|
|
Right low beam headlight does not illuminate |
Headlight ECU sub-assembly RH |
|
|
Headlight unit 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 ECU sub-assembly LH |
|
|
|
Right high beam headlight does not illuminate |
High beam headlight circuit |
|
|
Headlight ECU sub-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 |
|
|
Left low beam headlight and high beam headlight flicker |
Headlight ECU sub-assembly LH |
|
|
Right low beam headlight and high beam headlight flicker |
Headlight ECU sub-assembly RH |
|
Parking Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left parking light does not illuminate |
Parking light circuit |
|
|
Headlight ECU sub-assembly LH |
|
|
|
Right parking light does not illuminate |
Parking 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) |
|
|
|
Left parking light flicker |
Headlight ECU sub-assembly LH |
|
|
Right parking light flicker |
Headlight ECU sub-assembly RH |
|
Daytime Running Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left daytime running light does not illuminate |
Daytime running light circuit |
|
|
Headlight ECU sub-assembly LH |
|
|
|
Right daytime running light does not illuminate |
Daytime running light circuit |
|
|
Headlight ECU sub-assembly RH |
|
|
|
Both left and right daytime running lights do not illuminate |
Check customize settings |
|
|
Headlight dimmer switch circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Left daytime running light flicker |
Headlight ECU sub-assembly LH |
|
|
Right daytime running light flicker |
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 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 |
- |
Accessory Light (w/ Accessory Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right accessory light does not illuminate |
LED illumination light |
|
|
Harness or connector |
- |
|
|
Both left and right accessory lights do not illuminate |
Taillight relay circuit |
|
|
Harness or connector |
- |
Taillight (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right taillight (rear combination light assembly) does not illuminate |
Rear combination light lens and body |
|
|
Rear combination light cord |
|
|
|
Harness or connector |
- |
|
|
Left or right taillight (rear light assembly) does not illuminate |
Rear light lens and body |
|
|
Rear light socket and wire |
|
|
|
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) |
|
Taillight (for Sedan)
|
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 |
- |
|
|
Left or right taillight (rear light assembly) does not illuminate |
Rear light lens and body |
|
|
Rear light socket and wire |
|
|
|
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 lens and body |
|
License Plate Light (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right license plate light does not illuminate |
License plate light bulb |
|
|
Harness or connector |
- |
|
|
License plate light assembly |
|
|
|
Both left and right license plate lights do not illuminate |
Taillight relay circuit |
|
|
Harness or connector |
- |
License Plate Light (for Sedan)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
License plate light does not illuminate |
License plate light assembly |
|
|
Harness or connector |
- |
Stop Light (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right stop light does not illuminate |
Rear combination light LED |
|
|
Rear combination light cord |
|
|
|
Harness or connector |
- |
|
|
All of the stop lights do not illuminate |
STOP fuse |
- |
|
Stop light switch assembly |
|
|
|
Harness or connector |
- |
Stop Light (for Sedan)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right stop light does not illuminate |
Stop light LED |
|
|
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 (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
High mounted stop light does not illuminate |
Center stop light assembly |
|
|
Harness or connector |
- |
High Mounted Stop Light (for Sedan)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
High mounted stop light does not illuminate |
Center stop light set |
|
|
Harness or connector |
- |
Front Fog Light (w/ Front Fog Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front fog light does not illuminate |
Fog light assembly |
|
|
Harness or connector |
- |
|
|
Both left and right front fog lights do not illuminate (taillights are normal) |
Headlight dimmer switch circuit |
|
|
Front fog light circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Back-up Light (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right back-up light does not illuminate |
Rear light LED |
|
|
Rear light socket and wire |
|
|
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate |
BKUP LP fuse |
- |
|
ECU-ACC fuse*1 |
- |
|
|
Park/neutral position switch assembly*1 |
|
|
|
Back-up light switch assembly*2 |
|
|
|
Instrument panel junction block assembly |
|
|
|
Harness or connector |
- |
- *1: for CVT
- *2: for Manual Transaxle
Back-up Light (for Sedan)
|
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 |
BKUP LP fuse |
- |
|
ECU-ACC fuse |
- |
|
|
Park/neutral position switch assembly*1 |
|
|
|
Park/neutral position switch assembly*2 |
|
|
|
Instrument panel junction block assembly |
|
|
|
Harness or connector |
- |
- *1: for CVT (K313)
- *2: for CVT (K120)
Turn Signal Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Headlight ECU sub-assembly |
|
|
Headlight unit assembly |
|
|
|
Harness or connector |
- |
|
|
Left or right rear turn signal light does not operate*1 |
Rear combination light LED |
|
|
Rear combination light cord |
|
|
|
Harness or connector |
- |
|
|
Left or right rear turn signal light does not operate*2 |
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 |
|
- *1: for Hatchback
- *2: for Sedan
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 (w/ Telematics System)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Lights do not operate using remote operation function (Lighting system is normal) |
Telematics system*1 |
|
|
Telematics system*2 |
|
- *1: for Hatchback
- *2: for Sedan
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 Headlight Beam Level Control System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Automatic headlight beam level control system does not operate (Left Headlight) |
Headlight ECU sub-assembly LH |
|
|
Headlight unit assembly LH |
|
|
|
Automatic headlight beam level control system does not operate (Right Headlight) |
Headlight ECU sub-assembly RH |
|
|
Headlight unit assembly RH |
|
|
|
Initialization cannot be performed |
CAN communication system |
|
|
Headlight ECU sub-assembly LH |
|
AFS
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
AFS control does not operate (Left Headlight) |
Headlight ECU sub-assembly LH |
|
|
Headlight unit assembly LH |
|
|
|
AFS control does not operate (Right Headlight) |
Headlight ECU sub-assembly RH |
|
|
Headlight unit assembly RH |
|
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" |
|
|
|