HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): Air Vent cannot be Switched; 2019 - 2022 MY Avalon [04/2018

Last Modified: 08-21-2023	6.11:8.1.0	Doc ID: RM1000000019XO4
Model Year Start: 2019	Model: Avalon	Prod Date Range: [04/2018 - ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model): Air Vent cannot be Switched; 2019 - 2022 MY Avalon [04/2018 - ]

Air Vent cannot be Switched

DESCRIPTION

If the air outlet mode does not change even though the air outlet display changes, the following factors may be the cause.

Symptom	Factor
Air outlet mode cannot be changed (air outlet display changes)	No. 1 air conditioning radiator damper servo sub-assembly malfunction Damper link disconnection Air conditioner unit assembly malfunction

1.	CHECK AIR OUTLET SERVO MOTOR

(a) Confirm for which seat the air outlet mode cannot be changed.

Result	Proceed to
The air outlet mode for the driver seat cannot be changed	A
The air outlet mode for the front passenger seat cannot be changed	A
The air outlet mode for the rear seats cannot be changed	B

2.	CHECK NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Check that the No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.

OK:

The No. 1 air conditioning radiator damper servo sub-assembly is installed correctly.

INSTALL NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

3.	CHECK FOR DTC

(a) Check for DTCs.

Result	Proceed to
B1443 is not output	A
B1443 is output	B

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY

4.	CHECK NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Check that the No. 2 air conditioning radiator damper servo sub-assembly is installed correctly.

OK:

The No. 2 air conditioning radiator damper servo sub-assembly is installed correctly.

INSTALL NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

5.	CHECK FOR DTC

(a) Check for DTCs.

Result	Proceed to
B1449 is not output	A
B1449 is output	B

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY