Toyota CH-R Service Manual: Problem Symptoms Table

Toyota CH-R Service Manual / Lighting (int) / Lighting System / 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.

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*1: w/ Smart Key System

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.

Personal Light (Map light assembly)

Symptom	Suspected Area	Link
Personal light LH does not illuminate	Bulb	-
	Map light assembly
	Harness or connector	-
Personal light RH does not illuminate	Bulb	-
	Map light assembly
	Harness or connector	-

Room Light (No. 1 room light assembly)

Symptom	Suspected Area	Link
Room light does not illuminate	Bulb	-
Room light does not illuminate	Harness or connector (Including all light components that are part of the wire harness)	-

Vanity Light

Symptom	Suspected Area	Link
Vanity light LH does not illuminate	Bulb
	Visor assembly LH	-
	Harness or connector	-
Vanity light RH does not illuminate	Bulb
	Visor assembly RH	-
	Harness or connector	-

Ambient Illumination Light*1

Symptom	Suspected Area	Link
Door ambient illumination light LH does not illuminate	No. 1 interior illumination light assembly LH
Door ambient illumination light LH does not illuminate	Harness or connector	-
Door ambient illumination light RH does not illuminate	No. 1 interior illumination light assembly RH
Door ambient illumination light RH does not illuminate	Harness or connector	-
No. 1 cup holder illumination light	Instrument cluster finish panel garnish
No. 1 cup holder illumination light	Harness or connector	-
No. 2 cup holder illumination light	Instrument cluster finish panel center garnish
No. 2 cup holder illumination light	Harness or connector	-
All ambient lights do not illuminate	Ambient illumination light circuit
All ambient lights do not illuminate	Main body ECU (Multiplex network body ECU)

*1: w/ Door ambient illumination light

Glove Box Light

Symptom	Suspected Area	Link
Glove box light does not illuminate	Glove box light assembly
Glove box light does not illuminate	Harness or connector	-

Luggage Compartment Light

Symptom	Suspected Area	Link
Luggage compartment room light does not illuminate	Bulb	-
	No. 1 luggage compartment light assembly
	Back door courtesy switch circuit
	Harness or connector	-
	Instrument panel junction block assembly
	Main body ECU (Multiplex network body ECU)

Interior Light Power Source Control

Symptom	Suspected Area	Link
All the interior lights that receive power via the DOME CUT relay do not illuminate (The DOME fuse is normal)	Interior light auto cut circuit
	Main body ECU (Multiplex network body ECU)

Illuminated Entry System (Interior Light Control)

Symptom	Suspected Area	Link
All interior light control functions do not operate under any condition	Interior light circuit
	Main body ECU (Multiplex network body ECU)
Door open/close-linked control function does not operate when doors are opened/closed	Door courtesy switch circuit
	Map light assembly
	Main body ECU (Multiplex network body ECU)
Door lock/unlock-linked control function does not operate when doors are locked/unlocked	Door unlock detection switch circuit
	Main body ECU (Multiplex network body ECU)
Actuation area-linked control function does not operate when registered key is brought into any exterior detection area*1	CAN communication system
	Smart key system (for Entry Function)
	Main body ECU (Multiplex network body ECU)
Engine switch-linked control function does not operate when engine switch is operated*1	IG signal circuit
	ACC signal circuit
	Main body ECU (Multiplex network body ECU)
Ignition switch-linked control function does not operate when ignition switch is operated*2	IG signal circuit
	ACC signal circuit
	Main body ECU (Multiplex network body ECU)
Engine switch illumination does not illuminate*1	CAN communication system
	Engine switch illumination circuit
	Certification ECU (Smart key ECU assembly)

*1: w/ Smart Key System
*2: w/o Smart Key System

Illuminated Entry System (Ambient Illumination Light)*1

Symptom	Suspected Area	Link
All interior light control functions do not operate under any condition	Ambient illumination light circuit
	Main body ECU (Multiplex network body ECU)
Engine switch-linked control function does not operate when engine switch is operated*2	IG signal circuit
	ACC signal circuit
	Main body ECU (Multiplex network body ECU)
Ignition switch-linked control function does not operate when ignition switch is operated*2	IG signal circuit
	ACC signal circuit
	Main body ECU (Multiplex network body ECU)

*1: w/ Door ambient illumination light
*2: w/ Smart Key System
*3: w/o Smart Key System

Battery Saving Control

Symptom	Suspected Area	Link
Battery saving function does not operate	IG signal circuit
	ACC signal circuit
	Door courtesy switch circuit
	Back door courtesy switch circuit
	Interior light circuit
	Door unlock detection switch circuit
	Interior light auto cut circuit
	Main body ECU (Multiplex network body ECU)

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Toyota CH-R Service Manual: Problem Symptoms Table

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Terminals Of Ecu

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