Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Problem Symptoms Table

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Intelligent Clearance Sonar System(for Gasoline Model) / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

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.

General

Symptom	Suspected Area	Link
System does not operate at all	Intuitive parking assist system
	CAN communication system
	Clearance warning ECU assembly
	Steering pad switch assembly
	Blind spot monitor system

Sonar Function

Symptom	Suspected Area	Link
Detection function operates when the operating conditions are not met	EFI system
	Clearance warning ECU assembly
Detection function operates when vehicle is not within the required speed range (speedometer not malfunctioning)	CAN communication system
	Skid control ECU
	Clearance warning ECU assembly

Buzzer Function

Symptom	Suspected Area	Link
Intelligent clearance sonar system is normal but buzzer operation is intermittent	Check that the temporary mute function is not operating	-
	Proceed to "No. 1 Clearance Warning Buzzer Circuit"
	Proceed to "No. 2 Clearance Warning Buzzer Circuit"
	Clearance warning ECU assembly
	Combination meter assembly

Display Function

Symptom	Suspected Area	Link
While the ICS system is operating, no ICS notifications are displayed on the multi-information display.	CAN communication system
	Clearance warning ECU assembly
	Combination meter assembly
While the ICS system is operating, no ICS notifications are displayed on the headup display.*	CAN communication system
	Clearance warning ECU assembly
	Meter mirror sub-assembly
"ICS Malfunction Visit Your Dealer" is displayed	Combination meter assembly
"ICS Malfunction Visit Your Dealer" is displayed	Clearance warning ECU assembly
"ICS Unavailable" is displayed	Check that no foreign matter is attached to the ultrasonic sensors.	-
	Steering angle neutral point (Intelligent clearance sonar system registration)
	CAN communication system
	Combination meter assembly
	Clearance warning ECU assembly
ICS does not operate when there is a possibility of a collision (Warning message "ICS Unavailable" not displayed)	Check the installation of the ultrasonic sensors (front)
	Check the installation of the ultrasonic sensors (rear)
	Adjust the installation of the ultrasonic sensors as necessary.
	Ultrasonic sensors (front)
	Ultrasonic sensors (rear)
	Clearance warning ECU assembly
ICS control operates when there is no possibility of a collision	Check the installation of the ultrasonic sensors (front)
	Check the installation of the ultrasonic sensors (rear)
	Adjust the installation of the ultrasonic sensors as necessary.
	Ultrasonic sensors (front)
	Ultrasonic sensors (rear)
	Clearance warning ECU assembly
ICS control cannot be turned off (ICS OFF indicator does not illuminate)	Combination meter assembly (LED): Perform Active Test (Indicat. ICS OFF LCD)
	Steering pad switch assembly
	Clearance warning ECU assembly
ICS OFF indicator blinks	If "Yes" is displayed for the Data List item "BSM Radar Communication Invalid History", the blind spot monitor system may be malfunctioning.
	Check that no foreign matter is attached to the ultrasonic sensors.	-
	Steering angle neutral point (Intelligent clearance sonar system registration)

*: w/ Headup Display System

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Telematics System(for Gasoline Model): Problem Symptoms Table
PROBLEM SYMPTOMS TABLE 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 ...

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Problem Symptoms Table

Precaution

System Description

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Toyota Avalon (XX50) 2019-2022 Owners Manual

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual