Toyota Corolla Cross: Problem Symptoms Table

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (w/o Afs) / 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.*1
- *1: w/ Smart Key System
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 forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, 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	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
	CAN communication system*1
	CAN communication system*2
	Main body ECU (Multiplex network body ECU)
	CXPI communication system*3
Left high beam headlight does not illuminate	Headlight assembly LH*3
	Headlight assembly LH*4
	Harness or connector	-
Right high beam headlight does not illuminate	Headlight assembly RH*3
	Headlight assembly RH*4
	Harness or connector	-
Both left and right high beam headlights do not illuminate	High Beam Headlight Circuit*4
	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)
	CXPI communication system*3
High Flash (passing function) does not operate (high beam headlights are normal)	High Beam Headlight Circuit*4
	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)
	CXPI communication system*3

*1: for HEV Model
*2: for Gasoline Model
*3: for LED Type Parking Light
*4: for Bulb Type Parking Light

Parking Light

Symptom	Suspected Area	Link
Left or right clearance light does not illuminate	Parking light bulb*1	-
Left or right clearance light does not illuminate	Headlight unit assembly*2
Both left and right clearance lights do not illuminate	Headlight dimmer switch circuit
Both left and right clearance lights do not illuminate	Main body ECU (Multiplex network body ECU)

*1: for Bulb Type Parking Light
*2: for LED Type Parking Light

Front Side Marker Light

Symptom	Suspected Area	Link
Left front side marker light does not illuminate	Front side marker light bulb*1	-
Left front side marker light does not illuminate	Headlight unit assembly LH*2
Right front side marker light does not illuminate	Front side marker light bulb*1	-
Right front side marker light does not illuminate	Headlight unit assembly RH*2
Both left and right front side marker lights do not illuminate	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)

*1: for Bulb Type Parking Light
*2: for LED Type Parking Light

Taillight

Symptom	Suspected Area	Link
Left or right taillights/side marker lights (rear combination light assembly) does not illuminate	Taillight bulb*1	-
	Rear side marker light bulb*1	-
	Rear combination light assembly
	Harness or connector	-
Left or right taillight (rear light assembly) do not illuminate*2	Rear light assembly
	Harness or connector	-
All of the taillights, parking lights, rear side marker lights and license plate lights do not illuminate	Headlight dimmer switch circuit
	Taillight Relay Circuit
	Main body ECU (Multiplex network body ECU)

*1: for Bulb Type Parking Light
*2: for LED Type Parking Light

License Plate Light

Symptom	Suspected Area	Link
Left or right license plate light does not illuminate	License plate light bulb
Left or right license plate light does not illuminate	Harness or connector	-
Both left and right license plate lights do not illuminate	Taillight Relay Circuit
Both left and right license plate lights do not illuminate	Harness or connector	-

Stop Light

Symptom	Suspected Area	Link
Left or right stop light does not illuminate	Rear combination light assembly
Left or right stop light does not illuminate	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 assembly
High mounted stop light does not illuminate	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	-
Left or right front fog light does not illuminate	Harness or connector	-
Both left and right front fog lights do not illuminate (taillights are normal)	Headlight dimmer switch circuit
	Front fog light circuit
	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 assembly
	Harness or connector	-
Both left and right back-up lights do not illuminate	BKUP LP fuse	-
	Park/neutral position switch assembly*1
	Park/neutral position switch assembly*2
	Back-up light circuit3, 4
	Harness or connector	-

*1: for 2WD
*2: for AWD
*3: for Gasoline Model without Smart Key System
*4: for HEV Model

Turn Signal Light

Symptom	Suspected Area	Link
Left or right front turn signal light does not operate	Front turn signal light bulb*1	-
	Headlight unit assembly*2
	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	-
Left or right rear turn signal light does not operate	Rear combination light assembly
Left or right rear turn signal light does not operate	Harness or connector	-
Turn signal lights do not operate in one direction	Turn signal switch circuit
Turn signal lights do not operate in one direction	Meter/gauge system
All turn signal lights do not operate	Turn signal switch circuit
All turn signal lights do not operate	Meter/gauge system
All turn signal lights do not flash at the correct speed	Combination meter assembly

*1: for Bulb Type Parking Light
*2: for LED Type Parking Light
*3: for Outer Rear View Mirror Type Side Turn Signal Light

Hazard Warning Signal Light

Symptom	Suspected Area	Link
Hazard warning signal lights do not operate	Hazard warning switch circuit
Hazard warning signal lights do not operate	Combination meter assembly

Automatic Light Control System (w/ Automatic Light Control System)

Symptom	Suspected Area	Link
Automatic light control system does not operate	Headlight dimmer switch circuit
Automatic light control system does not operate	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)

Daytime Running Light System

Symptom	Suspected Area	Link
Left or right daytime running light does not illuminate	Headlight unit assembly
Left or right daytime running light does not illuminate	Harness or connector	-
Both left and right daytime running lights do not illuminate	Daytime Running Light Circuit

Welcome Light Illumination Control (for LED Type Parking Light)

Symptom	Suspected Area	Link
Welcome light illumination control does not operate	Check customize settings
Welcome light illumination control does not operate	Main body ECU (Multiplex network body ECU)

Wiper-linked Low Beam Headlight Control System (w/ Automatic Light Control System)

Symptom	Suspected Area	Link
Wiper-linked low beam headlight control system does not operate	Main body ECU (Multiplex network body ECU)

SEE MORE:

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Toyota Corolla Cross: Problem Symptoms Table

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Data List / Active Test

Diagnostic Trouble Code Chart

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