Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*1
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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.*2
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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.

*1: w/ Smart Key System
*2: for LED Headlight

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 Halogen Headlight)

Symptom	Suspected Area	Link
Left low beam headlight does not illuminate	No. 1 headlight bulb
Left low beam headlight does not illuminate	Harness or connector	-
Right low beam headlight does not illuminate	No. 1 headlight bulb
Right low beam headlight does not illuminate	Harness or connector	-
Both left and right low beam headlights do not illuminate	Headlight dimmer switch circuit
	Low beam headlight circuit
	Main body ECU (Multiplex network body ECU)
Left high beam headlight does not illuminate	Headlight unit assembly LH
Left high beam headlight does not illuminate	Harness or connector	-
Right high beam headlight does not illuminate	Headlight unit assembly RH
Right high beam headlight does not illuminate	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)

Headlight(for LED Headlight)

Symptom	Suspected Area	Link
Left low beam headlight does not illuminate	Headlight unit assembly LH
Left low beam headlight does not illuminate	Headlight ECU sub-assembly LH
Right low beam headlight does not illuminate	Headlight unit assembly RH
Right low beam headlight does not illuminate	Headlight ECU sub-assembly RH
Both left and right low beam headlights do not illuminate	Headlight dimmer switch circuit
Both left and right low beam headlights do not illuminate	Main body ECU (Multiplex network body ECU)
Left high beam headlight does not illuminate	High beam headlight circuit
	Headlight unit assembly LH
	Headlight ECU sub-assembly LH
Right high beam headlight does not illuminate	High beam headlight circuit
	Headlight unit assembly RH
	Headlight ECU sub-assembly RH
Both left and right high beam headlights do not illuminate	Headlight dimmer switch circuit
Both left and right high beam headlights do not illuminate	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, high beam headlight, daytime running light and clearance light do not illuminate	Power source circuit
	Headlight ECU sub-assembly LH
Right low beam headlight, high beam headlight, daytime running light and clearance light do not illuminate	Power source circuit
	Headlight ECU sub-assembly RH

Parking Light (Clearance Light)/Daytime Running Light

Symptom	Suspected Area	Link
Left parking light (clearance light)/daytime running light does not illuminate*1	Headlight unit assembly LH
	Harness or connector	-
Left clearance light/daytime running light does not illuminate*2	Clearance Light/Daytime running light circuit
	Headlight ECU sub-assembly LH
Right parking light (clearance light)/daytime running light does not illuminate*1	Headlight unit assembly RH
	Electric parking brake system
	Harness or connector	-
Right clearance light/daytime running light does not illuminate*2	Clearance Light/Daytime running light circuit
	Headlight ECU sub-assembly RH
Both left and right parking light (clearance light)/ do not illuminate*1	Electric parking brake system
	Headlight dimmer switch circuit
	Daytime running light relay circuit
	Main body ECU (Multiplex network body ECU)
Both left and right clearance lights do not illuminate*2	Electric parking brake system
	Headlight dimmer switch circuit
	Main body ECU (Multiplex network body ECU)

*1: for Halogen Headlight
*2: for LED Headlight

Taillight

Symptom	Suspected Area	Link
Left or right taillight and rear side marker light (rear combination light assembly) do not illuminate*1	Rear combination light socket and wire
	Rear combination light LED
	Harness or connector	-
Left or right taillight (rear combination light assembly) do not illuminate*2	Rear combination light assembly
	Harness or connector	-
Left or right taillight (rear light assembly) does not illuminate*2	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)

*1: w/ Toyota Safety Sense P
*2: for LED Headlight

License Plate Light

Symptom	Suspected Area	Link
Left or right license plate light does not illuminate	License plate light assembly
Left or right license plate light does not illuminate	Harness or connector	-

Stop Light

Symptom	Suspected Area	Link
Left or right stop light (rear combination light assembly) does not illuminate*1	Rear combination light assembly
	Harness or connector	-
Left or right stop light (rear combination light assembly) does not illuminate*2	Rear combination light socket and wire
	Rear combination light LED
	Harness or connector	-
Center stop light does not illuminate	Center stop light assembly
Center 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	-

*1: for LED Headlight
*2: for Halogen Headlight

Front Fog Light (w/ Fog Light)

Symptom	Suspected Area	Link
Left or right front fog light does not illuminate*1	Fog light assembly
Left or right front fog light does not illuminate*1	Harness or connector	-
Left or right front fog light does not illuminate*2	Fog light bulb	-
Left or right front fog light does not illuminate*2	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)

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

Back-up Light

Symptom	Suspected Area	Link
Left or right back-up light does not illuminate*1	BKUP LP Relay
	Back-up light bulb	-
	Back up light socket
	Harness or connector	-
Left or right back-up light does not illuminate*2	Back-up light bulb	-
	Back up light socket
	Harness or connector	-
Left or right back-up light does not illuminate*3	Rear light assembly
Left or right back-up light does not illuminate*3	Harness or connector	-
Both left and right back-up lights do not illuminate	Park/neutral position switch assembly
	Instrument panel junction block assembly
	Harness or connector	-

*1: w/ Toyota Safety Sense P
*2: for Halogen Headlight
*3: for LED Headlight

Turn Signal Light

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

*1: for Halogen Headlight
*2: for LED Headlight

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
Hazard warning signal switch indicator does not illuminate	Hazard warning signal switch assembly
	Combination meter assembly
	Harness or connector	-

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
	Door courtesy switch circuit
	Main body ECU (Multiplex network body ECU)

Door Mirror Foot Light Control (w/ Door Mirror Foot Light)

Symptom	Suspected Area	Link
All of the door mirror foot lights do not illuminate	Power door lock control system
	Wireless door lock control system (w/ Smart Key System)
	Smart key system (for Entry Function) (w/ Smart Key System)
	Door unlock detection switch circuit
	Footwell light circuit
	Main body ECU (Multiplex network body ECU)
Left or right door mirror foot light does not illuminate	Door mirror foot light
Left or right door mirror foot light does not illuminate	Harness or connector	-

Follow Me Home System (w/o Toyota Safety Sense P)

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)

Initialization

INITIALIZATION HEADLIGHT ECU SUB-ASSEMBLY LH INITIALIZATION (for LED Headlight) NOTICE: If any of the work in the table below has been performed, vehicle information registration and in ...

Terminals Of Ecu

TERMINALS OF ECU *A Main Body ECU (Multiplex Network Body ECU) with 2 Connectors - - *1 Main Body ECU (Multiplex Network Body ...

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Toyota CH-R Service Manual: Problem Symptoms Table

Initialization

Terminals Of Ecu

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