| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000002BT8P |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [03/2023 - ] |
| Title: LIGHTING (EXT): LIGHTING SYSTEM: PROBLEM SYMPTOMS TABLE; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2023 - ] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
for HV Model: Click here
![2023 - 2025 MY Corolla Corolla HV [09/2022 - ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION](/t3Portal/stylegraphics/info.gif)
for Gasoline Model: Click here
- 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.
-
When replacing the combination meter assembly, update the ECU security key.
Click here
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 (for LED Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right low beam headlight does not illuminate |
Refer to "LO-beam Headlight does not Illuminate" |
|
|
Left or right low beam headlight and parking light does not turn off |
Harness or connector (H-LP relay - Main body ECU (Multiplex network body ECU) (HRY2/HRLY terminal)) |
- |
|
Both left and right low beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
CXPI communication system |
|
|
|
Left or right high beam headlight does not illuminate |
Refer to "High Beam Headlight Circuit" |
|
|
Both left and right high beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
CXPI communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Harness or connector |
- |
|
|
High Flash (passing function) does not operate (high beam headlights are normal) |
Headlight dimmer switch circuit |
|
|
CXPI communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Headlight (for Bulb Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right low beam headlight does not illuminate |
Refer to "LO-beam Headlight does not Illuminate" |
|
|
Left or right low beam headlight does not turn off |
Harness or connector (H-LP relay - Main body ECU (Multiplex network body ECU) (HRY2/HRLY terminal)) |
- |
|
Both left and right low beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
|
Left or right high beam headlight does not illuminate |
Headlight unit assembly*1 |
|
|
Headlight assembly*2 |
|
|
|
Harness or connector |
- |
|
|
Both left and right high beam headlights do not illuminate |
Headlight dimmer switch circuit |
|
|
Refer to "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) |
|
- *1: for TMC Made
- *2: for TMMMS Made
Parking Light (for LED Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right parking light does not illuminate |
Parking light circuit |
|
|
Both left and right parking lights do not illuminate |
Headlight dimmer switch circuit |
|
|
CXPI communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Parking Light (for Bulb Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right parking light does not illuminate |
Front turn signal light bulb |
|
|
Harness or connector |
- |
|
|
Both left and right parking lights do not illuminate |
Taillight relay circuit |
|
|
Harness or connector |
- |
Front Side Marker Light (for LED Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front side marker light does not illuminate |
Headlight assembly |
|
|
Both left and right front side marker lights do not illuminate |
Headlight dimmer switch circuit |
|
|
CXPI communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Front Side Marker Light (for Bulb Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or 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 |
- |
Daytime Running Light (for LED Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right daytime running light does not illuminate |
Daytime running light circuit |
|
|
Both left and right daytime running lights do not illuminate |
Check customize settings |
|
|
Headlight dimmer switch circuit |
|
|
|
CXPI communication system |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
Daytime Running Light (for Bulb Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right daytime running light does not illuminate |
Headlight unit assembly*1 |
|
|
Headlight assembly*2 |
|
|
|
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*3 |
|
|
|
CAN communication system*4 |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
- *1: for TMC Made
- *2: for TMMMS Made
- *3: for HV Model
- *4: for Gasoline Model
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) |
|
- *: for LED Type Side Marker Light
Rear Side Marker Light (for Hatchback)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right rear side marker light does not illuminate |
Rear combination light lens and body |
|
Rear Side Marker Light (for Sedan)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right rear side marker light does not illuminate |
Rear combination light lens and body*1 |
|
|
Rear side marker light bulb*2 |
|
|
|
Harness or connector*2 |
- |
- *1: for LED Type Side Marker Light
- *2: for Bulb Type Side Marker Light
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 Sedan)
|
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 Hatchback)
|
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 |
- |
- *: for LED Type Rear Side Marker Light
High Mounted Stop Light
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
High mounted stop light does not illuminate |
Center stop light assembly*1 |
|
|
Center stop light set*2 |
|
|
|
Harness or connector |
- |
- *1: for Hatchback
- *2: for Sedan
Front Fog Light (w/ Front Fog Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front fog light does not illuminate |
Fog light assembly*1 |
|
|
Fog light LED*2 |
|
|
|
Harness or connector |
- |
|
|
Both left and right front fog light does not illuminate |
Headlight dimmer switch circuit |
|
|
Front fog light circuit |
|
|
|
Main body ECU (Multiplex network body ECU) |
|
- *1: for M20A-FKS
- *2: for G16E-GTS
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*1 |
Back-up light circuit |
|
|
Rear light LED |
|
|
|
Rear light socket and wire |
|
|
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate*2 |
BKUP LP fuse |
- |
|
Back-up light switch assembly |
|
|
|
Power distribution box assembly |
|
|
|
Harness or connector |
- |
- *1: for CVT (K121)
- *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*1 |
ECU-ACC fuse |
- |
|
Park/neutral position switch assembly |
|
|
|
Power distribution box assembly |
|
|
|
Harness or connector |
- |
|
|
Both left and right back-up lights do not illuminate*2, *3 |
Back-up light circuit |
|
|
Back-up light bulb |
|
|
|
Rear light socket and wire |
|
|
|
Harness or connector |
- |
- *1: for CVT (K120)
- *2: for HV Model
- *3: for CVT (K121)
Turn Signal Light (for LED Type Front Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Headlight 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*3 |
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*4 |
|
|
|
Meter/gauge system*5 |
|
|
|
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
- *3: w/ Side Turn Signal Light
- *4: for 12.3 Inch Display
- *5: except 12.3 Inch Display
Turn Signal Light (for Bulb Type Turn Signal Light)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Front turn signal light bulb |
|
|
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*3 |
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*4 |
|
|
|
Meter/gauge system*5 |
|
|
|
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
- *3: w/ Side Turn Signal Light
- *4: for 12.3 Inch Display
- *5: except 12.3 Inch Display
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 (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) |
|
Light Auto Turn-off System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Light auto turn-off system does not operate |
Headlight dimmer switch circuit |
|
|
IG signal circuit |
|
|
|
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) |
|
Remote Operation Function (w/ Telematics System)
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
Lights do not operate using remote operation function (Lighting system is normal) |
Telematics system |
|
|
|