Toyota Corolla Cross: Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
NOTICE:
- Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
- 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.
- When replacing the combination meter assembly, update the ECU security key.
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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 unit assembly LH |
|
|
Headlight ECU sub-assembly LH |
| |
|
Right low beam headlight does not illuminate |
Headlight unit assembly RH |
|
|
Headlight ECU sub-assembly RH |
| |
|
Left low beam headlight does not turn off |
Harness or connector (Headlight ECU sub-assembly LH (HEDL terminal) - Main body ECU (Multiplex network body ECU) (HDL terminal)) |
- |
|
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 unit assembly LH |
|
|
Headlight ECU sub-assembly LH |
| |
|
Right low beam headlight and high beam headlight do not illuminate |
Headlight unit assembly RH |
|
|
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 |
|
|
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 *1 |
|
|
Headlight dimmer switch circuit |
| |
|
Main body ECU (Multiplex network body ECU) |
| |
|
Left clearance light flicker |
Headlight ECU sub-assembly LH |
|
|
Right parking light/daytime running light flicker |
Headlight ECU sub-assembly RH |
|
- *1: for vehicles with customize setting "DRL Function"
|
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) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Left or right taillight (rear combination light assembly) does not illuminate |
Rear combination light assembly |
|
|
Harness or connector |
- | |
|
Left or right taillight (rear light assembly) does not illuminate |
Rear light assembly |
|
|
Harness or connector |
- | |
|
All of the taillights and license plate lights do not illuminate |
Headlight dimmer switch circuit |
|
|
Taillight relay circuit |
| |
|
Main body ECU (Multiplex network body ECU) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
License plate light does not illuminate |
License plate light bulb |
|
|
License plate light assembly |
| |
|
Harness or connector |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Left or right stop light does not illuminate |
Rear combination light assembly |
|
|
Harness or connector |
- | |
|
All of the stop lights do not illuminate |
STOP fuse | - |
|
Stop light switch assembly |
| |
|
Harness or connector |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
High mounted stop light does not illuminate |
Center stop light assembly |
|
|
Harness or connector |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Left or right front fog light does not illuminate |
Fog light LED | - |
|
Fog light assembly |
| |
|
Harness or connector |
- | |
|
Left or right front fog light does not illuminate |
Headlight dimmer switch circuit |
|
|
Front fog light circuit |
| |
|
Main body ECU (Multiplex network body ECU) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Left or right back-up light does not illuminate |
Back-up light bulb |
|
|
Rear light assembly |
| |
|
Harness or connector |
- | |
| Both left and right back-up lights do not illuminate (for HEV Model) |
Back-up light circuit |
|
|
Both left and right back-up lights do not illuminate (for Gasoline Model) |
BKUP LP fuse | - |
|
Park/neutral position switch assembly (for 2WD) |
| |
|
Park/neutral position switch assembly (for AWD) |
| |
|
Harness or connector |
- |
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Left or right front turn signal light does not operate |
Front turn signal light LED |
- |
| Headlight ECU sub-assembly |
| |
|
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 |
- | |
|
Left or right rear turn signal light does not operate (rear combination light assembly) |
Rear combination light 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 |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Hazard warning signal lights do not operate |
Hazard warning switch circuit |
|
|
Combination meter assembly |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Automatic light control system does not operate |
Headlight dimmer switch circuit |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
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) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Welcome light illumination control does not operate |
Check customize settings |
|
|
Main body ECU (Multiplex network body ECU) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
| Wiper-linked low beam headlight control system does not operate |
Main body ECU (Multiplex network body ECU) |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Automatic headlight beam level control system does not operate (Left Headlight) |
Headlight unit assembly LH |
|
|
Headlight ECU sub-assembly LH |
| |
|
Automatic headlight beam level control system does not operate (Right Headlight) |
Headlight unit assembly RH |
|
|
Headlight ECU sub-assembly RH |
| |
|
Both left and right automatic headlight beam level control system does not operate |
Headlight ECU sub-assembly LH |
|
|
CAN communication system (for HEV Model) |
| |
|
CAN communication system (for Gasoline Model) |
| |
|
Initialization cannot be performed |
Headlight ECU sub-assembly LH |
|
|
Symptom | Suspected Area |
Link |
|---|---|---|
|
Wiper-linked low beam headlight control system does not operate |
Headlight unit assembly LH |
|
|
Headlight ECU sub-assembly LH |
| |
|
AFS control does not operate (Right Headlight) |
Headlight unit assembly RH |
|
|
Headlight ECU sub-assembly RH |
|
READ NEXT:
Terminals Of Ecu
TERMINALS OF ECU CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assemb
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a lighting system (w/ AFS) DTC is stored, the headlight ECU sub-assembly or forward recognition camera stores the current vehicle state as freeze frame
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a p
SEE MORE:
Installation
INSTALLATION
CAUTION / NOTICE / HINT
COMPONENTS (INSTALLATION)
Procedure
Part Name Code
1
REAR NO. 1 SPRING BUMPER
48341B
-
-
-
2
REAR SUSPENSION S
Removal
REMOVAL
CAUTION / NOTICE / HINT
COMPONENTS (REMOVAL)
Procedure
Part Name Code
1
REAR WHEEL
-
-
-
-
2
REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LH
