Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001A3OP
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for HV Model): Air Vent cannot be Switched; 2019 - 2022 MY Avalon HV [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
  • No. 2 air conditioning radiator damper servo sub-assembly malfunction
  • No. 3 air conditioning radiator damper servo sub-assembly malfunction
  • Damper link disconnection
  • Air conditioner unit assembly malfunction

PROCEDURE

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

B

The air outlet mode for the rear seats cannot be changed

C
B

GO TO STEP 4

C

GO TO STEP 6

A

2.

CHECK NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY

(a) Check that the No. 3 air conditioning radiator damper servo sub-assembly is installed correctly.

OK:

The No. 3 air conditioning radiator damper servo sub-assembly is installed correctly.

NG

INSTALL NO. 3 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY 2020 - 2022 MY Avalon HV [08/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY

OK

3.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

B1443 is not output

A

B1443 is output

B
A

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2020 - 2021 MY Avalon HV [08/2019 - 08/2021]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2022 MY Avalon HV [08/2021 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL

B

GO TO DTC B1443

4.

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.

NG

INSTALL NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY 2020 - 2022 MY Avalon HV [08/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY

OK

5.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

B1448 is not output

A

B1448 is output

B
A

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2020 - 2021 MY Avalon HV [08/2019 - 08/2021]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2022 MY Avalon HV [08/2021 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL

B

GO TO DTC B1448

6.

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.

NG

INSTALL NO. 2 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY 2020 - 2022 MY Avalon HV [08/2019 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REASSEMBLY

OK

7.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Proceed to

B1449 is not output

A

B1449 is output

B
A

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY 2019 MY Avalon HV [04/2018 - 08/2019]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2020 - 2021 MY Avalon HV [08/2019 - 08/2021]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL 2022 MY Avalon HV [08/2021 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT (for HV Model): REMOVAL

B

GO TO DTC B1449