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 / Blind Spot Monitor 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.

Entire System

Symptom	Suspected Area	Link
System does not operate at all	Proceed to "Power Source Circuit"
	CAN communication system
	Blind spot monitor sensor RH
System cannot be turned off	CAN communication system
System cannot be turned off	Blind spot monitor sensor RH
"Blind Spot Monitor Unavailable" or "Blind Spot Monitor System Malfunction Visit Your Dealer" is displayed on the multi-information display	Check abnormality history
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Combination meter assembly
"Rear Cross Traffic Alert Unavailable" or "Rear Cross Traffic Alert Malfunction Visit Your Dealer" is displayed on the multi-information display	Check abnormality history
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Combination meter assembly

Blind Spot Monitor Function

Symptom	Suspected Area	Link
Outer rear view mirror indicator RH does not illuminate	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
	Outer mirror RH
	Outer mirror control ECU assembly RH*3
	Outer rear view mirror assembly RH
	Blind spot monitor sensor RH
Outer rear view mirror indicator LH does not illuminate	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
	Outer mirror LH
	Outer mirror control ECU assembly LH*3
	Outer rear view mirror assembly LH
	Blind spot monitor sensor LH
Outer rear view mirror indicator RH remains illuminated	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
Outer rear view mirror indicator RH remains illuminated	Blind spot monitor sensor RH
Outer rear view mirror indicator LH remains illuminated	Proceed to "Blind Spot Monitor Beam Axis Confirmation"
Outer rear view mirror indicator LH remains illuminated	Blind spot monitor sensor LH
Outer rear view mirror indicator RH does not flash	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*4
	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*5
	Blind spot monitor sensor RH
Outer rear view mirror indicator LH does not flash	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*4
	Proceed to "Turn Signal Light" in Problem Symptoms Table for the Lighting (EXT) section*5
	Blind spot monitor sensor LH
Outer rear view mirror indicator RH continues to flash	Blind spot monitor sensor RH
Outer rear view mirror indicator LH continues to flash	Blind spot monitor sensor LH

RCTA Function

Symptom	Suspected Area	Link
Function does not operate at all (Blind spot monitor function operates normally)	Data list / active test (Reverse)
	Automatic transmission system
	Blind spot monitor sensor LH
While RCTA function is active, outer rear view mirror indicator flashes but RCTA buzzer does not sound.	Proceed to "Buzzer does not Sound"
When shift lever is in R, detection operation is normal but RCTA indicator does not appear on multi-display	CAN communication system
	Blind spot monitor sensor RH
	Blind spot monitor sensor LH
	Radio and display receiver assembly
	Television camera assembly*1
	Parking assist ECU*2

*1: w/ Parking Assist Monitor System
*2: w/ Panoramic View Monitor System
*3: w/ Seat Memory
*4: for HV Model with Cornering Light
*5: for HV Model without Cornering Light

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

Precaution

System Description

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