Last Modified: 06-05-2026 6.11:8.1.0 Doc ID: RM1000000028C4I
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): Air Vent cannot be Switched; 2023 - 2026 MY GR Corolla Corolla Corolla Hatchback [11/2022 -        ]

Air Vent cannot be Switched

DESCRIPTION

If the air outlet does not change even after the mode switch display changes, the following causes are possible.

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

PROCEDURE

1.

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

Click here 2023 - 2025 MY GR Corolla Corolla Corolla Hatchback Corolla HV [09/2022 - 08/2025]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [08/2025 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REASSEMBLY

OK

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

Result

Result

Proceed to

B140287 and B14037F are not output

A

B140287 is output

B

B14037F is output

C
A

REPLACE AIR CONDITIONING RADIATOR ASSEMBLY

Click here 2023 - 2025 MY GR Corolla Corolla Corolla Hatchback Corolla HV [11/2022 - 09/2024]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL 2025 - 2026 MY GR Corolla Corolla Corolla Hatchback Corolla HV [09/2024 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING UNIT: REMOVAL

B

GO TO DTC B140287

Click here 2023 - 2025 MY GR Corolla Corolla Corolla Hatchback [11/2022 - 08/2025]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): B140287; Lost Communication with Front Air Outlet Damper Control Servo Motor LIN Missing Message 2026 MY GR Corolla Corolla Corolla Hatchback [08/2025 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): B140287; Lost Communication with Front Air Outlet Damper Control Servo Motor LIN Missing Message

C

GO TO DTC B14037F

Click here 2023 - 2025 MY GR Corolla Corolla Corolla Hatchback [11/2022 - 08/2025]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): B14037F; Front Air Outlet Damper Control Servo Motor Actuator Stuck Off 2026 MY GR Corolla Corolla Corolla Hatchback [08/2025 -        ]; HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): B14037F; Front Air Outlet Damper Control Servo Motor Actuator Stuck Off