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

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Horn / Horn System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

NOTICE:

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

for Gasoline Model: Click here

for HV Model: Click here

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.

Horn System

Symptom	Suspected Area	Link
Horn does not sound	HORN fuse	-
	HORN relay
	Horn button assembly
	Spiral cable sub-assembly
	Instrument panel junction block assembly
	Harness or connector	-
Horn sounds all the time	HORN relay
	Horn button assembly
	Spiral cable sub-assembly
	Instrument panel junction block assembly
	Main body ECU (Multiplex network body ECU)
	Harness or connector	-
Low pitched horn operates but high pitched horn does not operate	High pitched horn assembly
	Harness or connector	-
High pitched horn operates but low pitched horn does not operate	Low pitched horn assembly
	Harness or connector	-

Precaution

System Diagram

See More:

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

Precaution

System Diagram

See More:

Toyota Avalon (XX50) 2019-2022 Owners Manual

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