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

Tire Pressure Warning System

Symptom	Suspected Area	Link
Tire pressure warning light does not illuminate despite tire pressure decreasing	Initialization
	Check Data List (ID Tire Inflation Pressure)
	ID code check (Registration)
Tire pressure warning light remains illuminated (Goes off during initial check)	Tire pressure warning light circuit
Tire pressure warning light remains illuminated (Illuminates during initial check)	Check Data List (ID Tire Inflation Pressure)
	Tire pressure adjustment
	ID code check (Registration)
	Initialization
Initialization cannot be done	Tire pressure warning reset switch
Tire position not identified	Refer to "Tire position not identified".
Cannot switch to automatic ID registration mode	Refer to "Cannot switch to automatic ID registration mode".

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Parking Assist Monitor System(for Gasoline Model): Back Camera Power Supply Failure (C1621)
DESCRIPTION This DTC is stored if the television camera assembly judges as a result of its self check that the signals or signal lines between the television camera assembly and radio and display assembly are not normal. DTC No. Detection Item DTC Detection Condition Trouble Area C1621 Back Camera P ...

Toyota Avalon (XX50) 2019-2022 Owners Manual