Toyota Corolla Cross: Problem Symptoms Table

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / 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)*1, refer to Registration.
- *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.

Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Map Light

Symptom	Suspected Area	Link
Map light LH or map light RH does not illuminate (Other interior lights are normal)	Map light assembly
Map light LH and map light RH do not illuminate (Other interior lights are normal)	Map light assembly
	Harness or connector	-
Switch illumination or down light does not illuminate (Other interior lights are normal)	Map light assembly
Switch illumination and down light do not illuminate (Other interior lights are normal)	Map light assembly
	Harness or connector	-

Room Light

Symptom	Suspected Area	Link
Room light does not illuminate (Other interior lights are normal)	No. 1 room light assembly
	Harness or connector	-

Vanity Light (w/ Vanity Light)

Symptom	Suspected Area	Link
Vanity light LH does not illuminate (Other interior lights are normal)	Visor assembly LH
	Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness)	-
Vanity light RH does not illuminate (Other interior lights are normal)	Visor assembly RH
	Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness)	-

Luggage Compartment Light

Symptom	Suspected Area	Link
Luggage compartment light does not illuminate (Other interior lights are normal)	No. 1 luggage compartment light assembly
	Back door courtesy switch circuit
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)

Front Door Trim Illumination (w/ Ambient Illumination Light)

Symptom	Suspected Area	Link
Front Door Trim Illumination does not illuminate	Ambient illumination light circuit

Center Tray Illumination Light (w/ Ambient Illumination Light)

Symptom	Suspected Area	Link
Center Tray illumination light does not illuminate	Ambient illumination light circuit

Interior Light Power Source Control

Symptom	Suspected Area	Link
All the interior lights that receive power via the DOME CUT relay do not illuminate	Interior light auto cut circuit

Illuminated Entry System

Symptom	Suspected Area	Link
All illuminated entry system control functions do not operate under any condition	Interior light auto cut circuit
	Interior Light 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*2
	CAN communication system*3
	Smart key system (for Entry Function)*2
	Smart key system (for Entry Function)*3
	Main body ECU (Multiplex network body ECU)
Door lock/unlock-linked control function does not operate when doors are locked/unlocked	Check customize settings (Interior Lights ON when Door Unlocked Function)
	Door Unlock Detection Switch Circuit
	Main body ECU (Multiplex network body ECU)
Door open/close-linked control function does not operate when doors are opened/closed	Front door courtesy switch circuit
	Rear door courtesy switch circuit
	Back door courtesy switch circuit
	Main body ECU (Multiplex network body ECU)
Push start switch-linked control function does not operate when push start switch is operated*1	Check customize settings (Interior Lights ON when IG OFF Function)
	IG signal circuit
	Main body ECU (Multiplex network body ECU)
Push start switch illumination does not illuminate*1	CAN communication system*2
	CAN communication system*3
	Push Start Switch Illumination Circuit
Shift position-linked control does not operate when shift lever is operated	Check customize settings (Light Control Function)
	CAN communication system*2
	CAN communication system*3
	Main body ECU (Multiplex network body ECU)

*1: w/ Smart Key System
*2: for HEV Model
*3: for Gasoline Model

Auxiliary Battery Saving Control

Symptom	Suspected Area	Link
Auxiliary battery saving function does not operate	Check illuminated entry system
Auxiliary battery saving function does not operate	Main body ECU (Multiplex network body ECU)

Instrument Panel Illumination System

Symptom	Suspected Area	Link
No instrument panel illumination lights come on (taillights operate normally).	Instrument Panel Illumination does not Turn On
	Harness or connector	-

SEE MORE:

Idle Control System (P050500)

DESCRIPTION The idle speed is controlled by the electronic throttle control system. The electronic throttle control system is comprised of: 1) one valve type throttle body with motor assembly; 2) the throttle actuator, which operates the throttle valve; 3) the throttle position sensor, which detects

Engine Coolant Pump Circuit Short to Ground or Open (P26CA14)

DESCRIPTION Refer to DTC P26CA12. Click here DTC No. Detection Item DTC Detection Condition Trouble Area MIL Note P26CA14 Engine Coolant Pump Circuit Short to Ground or Open The operation duty ratio (WPO) of the monitoring inverter water pump with motor asse

Toyota Corolla Cross: Problem Symptoms Table

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Terminals Of Ecu

Data List / Active Test

IG Signal Circuit

SEE MORE:

Idle Control System (P050500)

Engine Coolant Pump Circuit Short to Ground or Open (P26CA14)