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 related to this system before inspecting the suspected areas below.

Symptom	Suspected Area	Link
Cooling fan does not operate	Engine coolant temperature sensor
	EFI-MAIN NO. 1 relay
	Cooling fan circuit
	Fan with motor assembly	-
	ECM
Cooling fan does not stop (continues to operates)	Engine coolant temperature sensor
	Cooling fan circuit
	Fan with motor assembly	-
	ECM
Cooling fan speed does not change	Cooling fan circuit
	Fan with motor assembly	-
	ECM

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Pre-collision System(for Gasoline Model): Brake System Malfunction (C1A50)
DESCRIPTION When the pre-collision system is operating, the driving support ECU assembly sends brake control signals to the skid control ECU (brake actuator assembly). If the driving support ECU assembly receives an electronically controlled brake system malfunction signal from the skid control ECU ...

Toyota Avalon (XX50) 2019-2022 Owners Manual